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gnt-instance(8) Ganeti | Version @GANETI_VERSION@ |
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================================================= |
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|
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Name |
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---- |
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|
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gnt-instance - Ganeti instance administration |
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|
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Synopsis |
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-------- |
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|
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**gnt-instance** {command} [arguments...] |
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|
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DESCRIPTION |
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----------- |
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|
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The **gnt-instance** command is used for instance administration in |
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the Ganeti system. |
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|
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COMMANDS |
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-------- |
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|
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Creation/removal/querying |
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~~~~~~~~~~~~~~~~~~~~~~~~~ |
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|
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ADD |
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^^^ |
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|
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| **add** |
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| {-t|\--disk-template {diskless | file \| plain \| drbd \| rbd}} |
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| {\--disk=*N*: {size=*VAL* \| adopt=*LV*}[,vg=*VG*][,metavg=*VG*][,mode=*ro\|rw*] |
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| \| {size=*VAL*,provider=*PROVIDER*}[,param=*value*... ][,mode=*ro\|rw*] |
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| \| {-s|\--os-size} *SIZE*} |
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| [\--no-ip-check] [\--no-name-check] [\--no-conflicts-check] |
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| [\--no-start] [\--no-install] |
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| [\--net=*N* [:options...] \| \--no-nics] |
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| [{-B|\--backend-parameters} *BEPARAMS*] |
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| [{-H|\--hypervisor-parameters} *HYPERVISOR* [: option=*value*... ]] |
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| [{-O|\--os-parameters} *param*=*value*... ] |
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| [\--file-storage-dir *dir\_path*] [\--file-driver {loop \| blktap}] |
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| {{-n|\--node} *node[:secondary-node]* \| {-I|\--iallocator} *name*} |
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| {{-o|\--os-type} *os-type*} |
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| [\--submit] |
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| [\--ignore-ipolicy] |
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| {*instance*} |
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|
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Creates a new instance on the specified host. The *instance* argument |
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must be in DNS, but depending on the bridge/routing setup, need not be |
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in the same network as the nodes in the cluster. |
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|
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The ``disk`` option specifies the parameters for the disks of the |
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instance. The numbering of disks starts at zero, and at least one disk |
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needs to be passed. For each disk, either the size or the adoption |
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source needs to be given, and optionally the access mode (read-only or |
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the default of read-write). The size is interpreted (when no unit is |
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given) in mebibytes. You can also use one of the suffixes *m*, *g* or |
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*t* to specify the exact the units used; these suffixes map to |
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mebibytes, gibibytes and tebibytes. For LVM and DRBD devices, the LVM |
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volume group can also be specified (via the ``vg`` key). For DRBD |
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devices, a different VG can be specified for the metadata device using |
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the ``metavg`` key. For ExtStorage devices, also the ``provider`` |
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option is mandatory, to specify which ExtStorage provider to use. |
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|
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When creating ExtStorage disks, also arbitrary parameters can be passed, |
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to the ExtStorage provider. Those parameters are passed as additional |
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comma separated options. Therefore, an ExtStorage disk provided by |
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provider ``pvdr1`` with parameters ``param1``, ``param2`` would be |
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passed as ``--disk 0:size=10G,provider=pvdr1,param1=val1,param2=val2``. |
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|
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When using the ``adopt`` key in the disk definition, Ganeti will |
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reuse those volumes (instead of creating new ones) as the |
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instance's disks. Ganeti will rename these volumes to the standard |
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format, and (without installing the OS) will use them as-is for the |
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instance. This allows migrating instances from non-managed mode |
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(e.g. plain KVM with LVM) to being managed via Ganeti. Please note that |
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this works only for the \`plain' disk template (see below for |
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template details). |
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|
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Alternatively, a single-disk instance can be created via the ``-s`` |
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option which takes a single argument, the size of the disk. This is |
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similar to the Ganeti 1.2 version (but will only create one disk). |
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|
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The minimum disk specification is therefore ``--disk 0:size=20G`` (or |
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``-s 20G`` when using the ``-s`` option), and a three-disk instance |
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can be specified as ``--disk 0:size=20G --disk 1:size=4G --disk |
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2:size=100G``. |
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|
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The minimum information needed to specify an ExtStorage disk are the |
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``size`` and the ``provider``. For example: |
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``--disk 0:size=20G,provider=pvdr1``. |
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|
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The ``--no-ip-check`` skips the checks that are done to see if the |
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instance's IP is not already alive (i.e. reachable from the master |
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node). |
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|
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The ``--no-name-check`` skips the check for the instance name via |
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the resolver (e.g. in DNS or /etc/hosts, depending on your setup). |
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Since the name check is used to compute the IP address, if you pass |
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this option you must also pass the ``--no-ip-check`` option. |
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|
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If you don't want the instance to automatically start after |
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creation, this is possible via the ``--no-start`` option. This will |
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leave the instance down until a subsequent **gnt-instance start** |
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command. |
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|
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The NICs of the instances can be specified via the ``--net`` |
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option. By default, one NIC is created for the instance, with a |
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random MAC, and set up according the the cluster level NIC |
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parameters. Each NIC can take these parameters (all optional): |
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|
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mac |
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either a value or 'generate' to generate a new unique MAC |
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|
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ip |
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specifies the IP address assigned to the instance from the Ganeti |
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side (this is not necessarily what the instance will use, but what |
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the node expects the instance to use). Note that if an IP in the |
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range of a network configured with **gnt-network**\(8) is used, |
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and the NIC is not already connected to it, this network has to be |
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passed in the **network** parameter if this NIC is meant to be |
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connected to the said network. ``--no-conflicts-check`` can be used |
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to override this check. The special value **pool** causes Ganeti to |
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select an IP from the the network the NIC is or will be connected to. |
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|
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mode |
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specifies the connection mode for this NIC: routed, bridged or |
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openvswitch. |
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|
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link |
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in bridged or openvswitch mode specifies the interface to attach |
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this NIC to, in routed mode it's intended to differentiate between |
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different routing tables/instance groups (but the meaning is |
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dependent on the network script, see **gnt-cluster**\(8) for more |
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details). Note that openvswitch support is also hypervisor |
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dependent. |
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|
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network |
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derives the mode and the link from the settings of the network |
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which is identified by its name. If the network option is chosen, |
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link and mode must not be specified. Note that the mode and link |
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depend on the network-to-nodegroup connection, thus allowing |
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different nodegroups to be connected to the same network in |
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different ways. |
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|
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|
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Of these "mode" and "link" are NIC parameters, and inherit their |
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default at cluster level. Alternatively, if no network is desired for |
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the instance, you can prevent the default of one NIC with the |
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``--no-nics`` option. |
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|
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The ``-o (--os-type)`` option specifies the operating system to be |
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installed. The available operating systems can be listed with |
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**gnt-os list**. Passing ``--no-install`` will however skip the OS |
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installation, allowing a manual import if so desired. Note that the |
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no-installation mode will automatically disable the start-up of the |
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instance (without an OS, it most likely won't be able to start-up |
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successfully). |
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|
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The ``-B (--backend-parameters)`` option specifies the backend |
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parameters for the instance. If no such parameters are specified, the |
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values are inherited from the cluster. Possible parameters are: |
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|
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maxmem |
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the maximum memory size of the instance; as usual, suffixes can be |
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used to denote the unit, otherwise the value is taken in mebibytes |
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|
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minmem |
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the minimum memory size of the instance; as usual, suffixes can be |
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used to denote the unit, otherwise the value is taken in mebibytes |
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|
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vcpus |
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the number of VCPUs to assign to the instance (if this value makes |
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sense for the hypervisor) |
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|
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auto\_balance |
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whether the instance is considered in the N+1 cluster checks |
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(enough redundancy in the cluster to survive a node failure) |
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|
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always\_failover |
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``True`` or ``False``, whether the instance must be failed over |
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(shut down and rebooted) always or it may be migrated (briefly |
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suspended) |
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|
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Note that before 2.6 Ganeti had a ``memory`` parameter, which was the |
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only value of memory an instance could have. With the |
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``maxmem``/``minmem`` change Ganeti guarantees that at least the minimum |
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memory is always available for an instance, but allows more memory to be |
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used (up to the maximum memory) should it be free. |
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|
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The ``-H (--hypervisor-parameters)`` option specified the hypervisor |
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to use for the instance (must be one of the enabled hypervisors on the |
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cluster) and optionally custom parameters for this instance. If not |
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other options are used (i.e. the invocation is just -H *NAME*) the |
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instance will inherit the cluster options. The defaults below show the |
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cluster defaults at cluster creation time. |
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|
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The possible hypervisor options are as follows: |
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|
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boot\_order |
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Valid for the Xen HVM and KVM hypervisors. |
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|
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A string value denoting the boot order. This has different meaning |
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for the Xen HVM hypervisor and for the KVM one. |
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|
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For Xen HVM, The boot order is a string of letters listing the boot |
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devices, with valid device letters being: |
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|
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a |
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floppy drive |
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|
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c |
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hard disk |
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|
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d |
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CDROM drive |
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|
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n |
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network boot (PXE) |
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|
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The default is not to set an HVM boot order, which is interpreted |
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as 'dc'. |
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|
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For KVM the boot order is either "floppy", "cdrom", "disk" or |
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"network". Please note that older versions of KVM couldn't netboot |
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from virtio interfaces. This has been fixed in more recent versions |
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and is confirmed to work at least with qemu-kvm 0.11.1. Also note |
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that if you have set the ``kernel_path`` option, that will be used |
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for booting, and this setting will be silently ignored. |
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|
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blockdev\_prefix |
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Valid for the Xen HVM and PVM hypervisors. |
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|
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Relevant to non-pvops guest kernels, in which the disk device names |
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are given by the host. Allows one to specify 'xvd', which helps run |
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Red Hat based installers, driven by anaconda. |
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|
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floppy\_image\_path |
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Valid for the KVM hypervisor. |
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|
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The path to a floppy disk image to attach to the instance. This |
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is useful to install Windows operating systems on Virt/IO disks |
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because you can specify here the floppy for the drivers at |
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installation time. |
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|
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cdrom\_image\_path |
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Valid for the Xen HVM and KVM hypervisors. |
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|
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The path to a CDROM image to attach to the instance. |
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|
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cdrom2\_image\_path |
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Valid for the KVM hypervisor. |
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|
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The path to a second CDROM image to attach to the instance. |
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**NOTE**: This image can't be used to boot the system. To do that |
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you have to use the 'cdrom\_image\_path' option. |
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|
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nic\_type |
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Valid for the Xen HVM and KVM hypervisors. |
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|
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This parameter determines the way the network cards are presented |
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to the instance. The possible options are: |
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|
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- rtl8139 (default for Xen HVM) (HVM & KVM) |
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- ne2k\_isa (HVM & KVM) |
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- ne2k\_pci (HVM & KVM) |
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- i82551 (KVM) |
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- i82557b (KVM) |
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- i82559er (KVM) |
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- pcnet (KVM) |
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- e1000 (KVM) |
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- paravirtual (default for KVM) (HVM & KVM) |
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|
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vif\_type |
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Valid for the Xen HVM hypervisor. |
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|
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This parameter specifies the vif type of the nic configuration |
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of the instance. Unsetting the value leads to no type being specified |
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in the configuration. Note that this parameter only takes effect when |
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the 'nic_type' is not set. The possible options are: |
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|
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- ioemu |
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- vif |
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|
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disk\_type |
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Valid for the Xen HVM and KVM hypervisors. |
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|
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This parameter determines the way the disks are presented to the |
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instance. The possible options are: |
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|
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- ioemu [default] (HVM & KVM) |
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- ide (HVM & KVM) |
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- scsi (KVM) |
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- sd (KVM) |
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- mtd (KVM) |
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- pflash (KVM) |
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|
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|
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cdrom\_disk\_type |
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Valid for the KVM hypervisor. |
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|
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This parameter determines the way the cdroms disks are presented |
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to the instance. The default behavior is to get the same value of |
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the earlier parameter (disk_type). The possible options are: |
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|
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- paravirtual |
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- ide |
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- scsi |
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- sd |
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- mtd |
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- pflash |
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|
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|
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vnc\_bind\_address |
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Valid for the Xen HVM and KVM hypervisors. |
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|
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Specifies the address that the VNC listener for this instance |
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should bind to. Valid values are IPv4 addresses. Use the address |
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0.0.0.0 to bind to all available interfaces (this is the default) |
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or specify the address of one of the interfaces on the node to |
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restrict listening to that interface. |
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|
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vnc\_tls |
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Valid for the KVM hypervisor. |
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|
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A boolean option that controls whether the VNC connection is |
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secured with TLS. |
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|
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vnc\_x509\_path |
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Valid for the KVM hypervisor. |
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|
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If ``vnc_tls`` is enabled, this options specifies the path to the |
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x509 certificate to use. |
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|
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vnc\_x509\_verify |
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Valid for the KVM hypervisor. |
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|
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spice\_bind |
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Valid for the KVM hypervisor. |
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|
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Specifies the address or interface on which the SPICE server will |
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listen. Valid values are: |
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|
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- IPv4 addresses, including 0.0.0.0 and 127.0.0.1 |
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- IPv6 addresses, including :: and ::1 |
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- names of network interfaces |
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|
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If a network interface is specified, the SPICE server will be bound |
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to one of the addresses of that interface. |
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|
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spice\_ip\_version |
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Valid for the KVM hypervisor. |
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|
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Specifies which version of the IP protocol should be used by the |
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SPICE server. |
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|
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It is mainly intended to be used for specifying what kind of IP |
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addresses should be used if a network interface with both IPv4 and |
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IPv6 addresses is specified via the ``spice_bind`` parameter. In |
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this case, if the ``spice_ip_version`` parameter is not used, the |
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default IP version of the cluster will be used. |
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|
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spice\_password\_file |
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Valid for the KVM hypervisor. |
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|
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Specifies a file containing the password that must be used when |
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connecting via the SPICE protocol. If the option is not specified, |
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passwordless connections are allowed. |
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|
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spice\_image\_compression |
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Valid for the KVM hypervisor. |
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|
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Configures the SPICE lossless image compression. Valid values are: |
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|
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- auto_glz |
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- auto_lz |
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- quic |
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- glz |
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- lz |
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- off |
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|
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spice\_jpeg\_wan\_compression |
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Valid for the KVM hypervisor. |
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|
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Configures how SPICE should use the jpeg algorithm for lossy image |
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compression on slow links. Valid values are: |
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|
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- auto |
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- never |
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- always |
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|
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spice\_zlib\_glz\_wan\_compression |
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Valid for the KVM hypervisor. |
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|
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Configures how SPICE should use the zlib-glz algorithm for lossy image |
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compression on slow links. Valid values are: |
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|
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- auto |
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- never |
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- always |
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|
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spice\_streaming\_video |
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Valid for the KVM hypervisor. |
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|
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Configures how SPICE should detect video streams. Valid values are: |
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|
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- off |
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- all |
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- filter |
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|
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spice\_playback\_compression |
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Valid for the KVM hypervisor. |
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|
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Configures whether SPICE should compress audio streams or not. |
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|
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spice\_use\_tls |
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Valid for the KVM hypervisor. |
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|
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Specifies that the SPICE server must use TLS to encrypt all the |
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traffic with the client. |
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|
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spice\_tls\_ciphers |
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Valid for the KVM hypervisor. |
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|
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Specifies a list of comma-separated ciphers that SPICE should use |
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for TLS connections. For the format, see man **cipher**\(1). |
426 |
|
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spice\_use\_vdagent |
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Valid for the KVM hypervisor. |
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|
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Enables or disables passing mouse events via SPICE vdagent. |
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|
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cpu\_type |
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Valid for the KVM hypervisor. |
434 |
|
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This parameter determines the emulated cpu for the instance. If this |
436 |
parameter is empty (which is the default configuration), it will not |
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be passed to KVM. |
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|
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Be aware of setting this parameter to ``"host"`` if you have nodes |
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with different CPUs from each other. Live migration may stop working |
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in this situation. |
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|
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For more information please refer to the KVM manual. |
444 |
|
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acpi |
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Valid for the Xen HVM and KVM hypervisors. |
447 |
|
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A boolean option that specifies if the hypervisor should enable |
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ACPI support for this instance. By default, ACPI is disabled. |
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|
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pae |
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Valid for the Xen HVM and KVM hypervisors. |
453 |
|
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A boolean option that specifies if the hypervisor should enabled |
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PAE support for this instance. The default is false, disabling PAE |
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support. |
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|
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use\_localtime |
459 |
Valid for the Xen HVM and KVM hypervisors. |
460 |
|
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A boolean option that specifies if the instance should be started |
462 |
with its clock set to the localtime of the machine (when true) or |
463 |
to the UTC (When false). The default is false, which is useful for |
464 |
Linux/Unix machines; for Windows OSes, it is recommended to enable |
465 |
this parameter. |
466 |
|
467 |
kernel\_path |
468 |
Valid for the Xen PVM and KVM hypervisors. |
469 |
|
470 |
This option specifies the path (on the node) to the kernel to boot |
471 |
the instance with. Xen PVM instances always require this, while for |
472 |
KVM if this option is empty, it will cause the machine to load the |
473 |
kernel from its disks (and the boot will be done accordingly to |
474 |
``boot_order``). |
475 |
|
476 |
kernel\_args |
477 |
Valid for the Xen PVM and KVM hypervisors. |
478 |
|
479 |
This options specifies extra arguments to the kernel that will be |
480 |
loaded. device. This is always used for Xen PVM, while for KVM it |
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is only used if the ``kernel_path`` option is also specified. |
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|
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The default setting for this value is simply ``"ro"``, which |
484 |
mounts the root disk (initially) in read-only one. For example, |
485 |
setting this to single will cause the instance to start in |
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single-user mode. |
487 |
|
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initrd\_path |
489 |
Valid for the Xen PVM and KVM hypervisors. |
490 |
|
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This option specifies the path (on the node) to the initrd to boot |
492 |
the instance with. Xen PVM instances can use this always, while |
493 |
for KVM if this option is only used if the ``kernel_path`` option |
494 |
is also specified. You can pass here either an absolute filename |
495 |
(the path to the initrd) if you want to use an initrd, or use the |
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format no\_initrd\_path for no initrd. |
497 |
|
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root\_path |
499 |
Valid for the Xen PVM and KVM hypervisors. |
500 |
|
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This options specifies the name of the root device. This is always |
502 |
needed for Xen PVM, while for KVM it is only used if the |
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``kernel_path`` option is also specified. |
504 |
|
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Please note, that if this setting is an empty string and the |
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hypervisor is Xen it will not be written to the Xen configuration |
507 |
file |
508 |
|
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serial\_console |
510 |
Valid for the KVM hypervisor. |
511 |
|
512 |
This boolean option specifies whether to emulate a serial console |
513 |
for the instance. Note that some versions of KVM have a bug that |
514 |
will make an instance hang when configured to use the serial console |
515 |
unless a connection is made to it within about 2 seconds of the |
516 |
instance's startup. For such case it's recommended to disable this |
517 |
option, which is enabled by default. |
518 |
|
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serial\_speed |
520 |
Valid for the KVM hypervisor. |
521 |
|
522 |
This integer option specifies the speed of the serial console. |
523 |
Common values are 9600, 19200, 38400, 57600 and 115200: choose the |
524 |
one which works on your system. (The default is 38400 for historical |
525 |
reasons, but newer versions of kvm/qemu work with 115200) |
526 |
|
527 |
disk\_cache |
528 |
Valid for the KVM hypervisor. |
529 |
|
530 |
The disk cache mode. It can be either default to not pass any |
531 |
cache option to KVM, or one of the KVM cache modes: none (for |
532 |
direct I/O), writethrough (to use the host cache but report |
533 |
completion to the guest only when the host has committed the |
534 |
changes to disk) or writeback (to use the host cache and report |
535 |
completion as soon as the data is in the host cache). Note that |
536 |
there are special considerations for the cache mode depending on |
537 |
version of KVM used and disk type (always raw file under Ganeti), |
538 |
please refer to the KVM documentation for more details. |
539 |
|
540 |
security\_model |
541 |
Valid for the KVM hypervisor. |
542 |
|
543 |
The security model for kvm. Currently one of *none*, *user* or |
544 |
*pool*. Under *none*, the default, nothing is done and instances |
545 |
are run as the Ganeti daemon user (normally root). |
546 |
|
547 |
Under *user* kvm will drop privileges and become the user |
548 |
specified by the security\_domain parameter. |
549 |
|
550 |
Under *pool* a global cluster pool of users will be used, making |
551 |
sure no two instances share the same user on the same node. (this |
552 |
mode is not implemented yet) |
553 |
|
554 |
security\_domain |
555 |
Valid for the KVM hypervisor. |
556 |
|
557 |
Under security model *user* the username to run the instance |
558 |
under. It must be a valid username existing on the host. |
559 |
|
560 |
Cannot be set under security model *none* or *pool*. |
561 |
|
562 |
kvm\_flag |
563 |
Valid for the KVM hypervisor. |
564 |
|
565 |
If *enabled* the -enable-kvm flag is passed to kvm. If *disabled* |
566 |
-disable-kvm is passed. If unset no flag is passed, and the |
567 |
default running mode for your kvm binary will be used. |
568 |
|
569 |
mem\_path |
570 |
Valid for the KVM hypervisor. |
571 |
|
572 |
This option passes the -mem-path argument to kvm with the path (on |
573 |
the node) to the mount point of the hugetlbfs file system, along |
574 |
with the -mem-prealloc argument too. |
575 |
|
576 |
use\_chroot |
577 |
Valid for the KVM hypervisor. |
578 |
|
579 |
This boolean option determines whether to run the KVM instance in a |
580 |
chroot directory. |
581 |
|
582 |
If it is set to ``true``, an empty directory is created before |
583 |
starting the instance and its path is passed via the -chroot flag |
584 |
to kvm. The directory is removed when the instance is stopped. |
585 |
|
586 |
It is set to ``false`` by default. |
587 |
|
588 |
migration\_downtime |
589 |
Valid for the KVM hypervisor. |
590 |
|
591 |
The maximum amount of time (in ms) a KVM instance is allowed to be |
592 |
frozen during a live migration, in order to copy dirty memory |
593 |
pages. Default value is 30ms, but you may need to increase this |
594 |
value for busy instances. |
595 |
|
596 |
This option is only effective with kvm versions >= 87 and qemu-kvm |
597 |
versions >= 0.11.0. |
598 |
|
599 |
cpu\_mask |
600 |
Valid for the Xen, KVM and LXC hypervisors. |
601 |
|
602 |
The processes belonging to the given instance are only scheduled |
603 |
on the specified CPUs. |
604 |
|
605 |
The format of the mask can be given in three forms. First, the word |
606 |
"all", which signifies the common case where all VCPUs can live on |
607 |
any CPU, based on the hypervisor's decisions. |
608 |
|
609 |
Second, a comma-separated list of CPU IDs or CPU ID ranges. The |
610 |
ranges are defined by a lower and higher boundary, separated by a |
611 |
dash, and the boundaries are inclusive. In this form, all VCPUs of |
612 |
the instance will be mapped on the selected list of CPUs. Example: |
613 |
``0-2,5``, mapping all VCPUs (no matter how many) onto physical CPUs |
614 |
0, 1, 2 and 5. |
615 |
|
616 |
The last form is used for explicit control of VCPU-CPU pinnings. In |
617 |
this form, the list of VCPU mappings is given as a colon (:) |
618 |
separated list, whose elements are the possible values for the |
619 |
second or first form above. In this form, the number of elements in |
620 |
the colon-separated list _must_ equal the number of VCPUs of the |
621 |
instance. |
622 |
|
623 |
Example: |
624 |
|
625 |
.. code-block:: bash |
626 |
|
627 |
# Map the entire instance to CPUs 0-2 |
628 |
gnt-instance modify -H cpu_mask=0-2 my-inst |
629 |
|
630 |
# Map vCPU 0 to physical CPU 1 and vCPU 1 to CPU 3 (assuming 2 vCPUs) |
631 |
gnt-instance modify -H cpu_mask=1:3 my-inst |
632 |
|
633 |
# Pin vCPU 0 to CPUs 1 or 2, and vCPU 1 to any CPU |
634 |
gnt-instance modify -H cpu_mask=1-2:all my-inst |
635 |
|
636 |
# Pin vCPU 0 to any CPU, vCPU 1 to CPUs 1, 3, 4 or 5, and CPU 2 to |
637 |
# CPU 0 (backslashes for escaping the comma) |
638 |
gnt-instance modify -H cpu_mask=all:1\\,3-5:0 my-inst |
639 |
|
640 |
# Pin entire VM to CPU 0 |
641 |
gnt-instance modify -H cpu_mask=0 my-inst |
642 |
|
643 |
# Turn off CPU pinning (default setting) |
644 |
gnt-instance modify -H cpu_mask=all my-inst |
645 |
|
646 |
cpu\_cap |
647 |
Valid for the Xen hypervisor. |
648 |
|
649 |
Set the maximum amount of cpu usage by the VM. The value is a percentage |
650 |
between 0 and (100 * number of VCPUs). Default cap is 0: unlimited. |
651 |
|
652 |
cpu\_weight |
653 |
Valid for the Xen hypervisor. |
654 |
|
655 |
Set the cpu time ratio to be allocated to the VM. Valid values are |
656 |
between 1 and 65535. Default weight is 256. |
657 |
|
658 |
usb\_mouse |
659 |
Valid for the KVM hypervisor. |
660 |
|
661 |
This option specifies the usb mouse type to be used. It can be |
662 |
"mouse" or "tablet". When using VNC it's recommended to set it to |
663 |
"tablet". |
664 |
|
665 |
keymap |
666 |
Valid for the KVM hypervisor. |
667 |
|
668 |
This option specifies the keyboard mapping to be used. It is only |
669 |
needed when using the VNC console. For example: "fr" or "en-gb". |
670 |
|
671 |
reboot\_behavior |
672 |
Valid for Xen PVM, Xen HVM and KVM hypervisors. |
673 |
|
674 |
Normally if an instance reboots, the hypervisor will restart it. If |
675 |
this option is set to ``exit``, the hypervisor will treat a reboot |
676 |
as a shutdown instead. |
677 |
|
678 |
It is set to ``reboot`` by default. |
679 |
|
680 |
cpu\_cores |
681 |
Valid for the KVM hypervisor. |
682 |
|
683 |
Number of emulated CPU cores. |
684 |
|
685 |
cpu\_threads |
686 |
Valid for the KVM hypervisor. |
687 |
|
688 |
Number of emulated CPU threads. |
689 |
|
690 |
cpu\_sockets |
691 |
Valid for the KVM hypervisor. |
692 |
|
693 |
Number of emulated CPU sockets. |
694 |
|
695 |
soundhw |
696 |
Valid for the KVM hypervisor. |
697 |
|
698 |
Comma separated list of emulated sounds cards, or "all" to enable |
699 |
all the available ones. |
700 |
|
701 |
usb\_devices |
702 |
Valid for the KVM hypervisor. |
703 |
|
704 |
Comma separated list of usb devices. These can be emulated devices |
705 |
or passthrough ones, and each one gets passed to kvm with its own |
706 |
``-usbdevice`` option. See the **qemu**\(1) manpage for the syntax |
707 |
of the possible components. |
708 |
|
709 |
vga |
710 |
Valid for the KVM hypervisor. |
711 |
|
712 |
Emulated vga mode, passed the the kvm -vga option. |
713 |
|
714 |
kvm\_extra |
715 |
Valid for the KVM hypervisor. |
716 |
|
717 |
Any other option to the KVM hypervisor, useful tweaking anything |
718 |
that Ganeti doesn't support. Note that values set with this |
719 |
parameter are split on a space character and currently don't support |
720 |
quoting. |
721 |
|
722 |
machine\_version |
723 |
Valid for the KVM hypervisor. |
724 |
|
725 |
Use in case an instance must be booted with an exact type of |
726 |
machine version (due to e.g. outdated drivers). In case it's not set |
727 |
the default version supported by your version of kvm is used. |
728 |
|
729 |
kvm\_path |
730 |
Valid for the KVM hypervisor. |
731 |
|
732 |
Path to the userspace KVM (or qemu) program. |
733 |
|
734 |
The ``-O (--os-parameters)`` option allows customisation of the OS |
735 |
parameters. The actual parameter names and values depends on the OS |
736 |
being used, but the syntax is the same key=value. For example, setting |
737 |
a hypothetical ``dhcp`` parameter to yes can be achieved by:: |
738 |
|
739 |
gnt-instance add -O dhcp=yes ... |
740 |
|
741 |
The ``-I (--iallocator)`` option specifies the instance allocator plugin |
742 |
to use (``.`` means the default allocator). If you pass in this option |
743 |
the allocator will select nodes for this instance automatically, so you |
744 |
don't need to pass them with the ``-n`` option. For more information |
745 |
please refer to the instance allocator documentation. |
746 |
|
747 |
The ``-t (--disk-template)`` options specifies the disk layout type |
748 |
for the instance. The available choices are: |
749 |
|
750 |
diskless |
751 |
This creates an instance with no disks. Its useful for testing only |
752 |
(or other special cases). |
753 |
|
754 |
file |
755 |
Disk devices will be regular files. |
756 |
|
757 |
sharedfile |
758 |
Disk devices will be regulare files on a shared directory. |
759 |
|
760 |
plain |
761 |
Disk devices will be logical volumes. |
762 |
|
763 |
drbd |
764 |
Disk devices will be drbd (version 8.x) on top of lvm volumes. |
765 |
|
766 |
rbd |
767 |
Disk devices will be rbd volumes residing inside a RADOS cluster. |
768 |
|
769 |
blockdev |
770 |
Disk devices will be adopted pre-existent block devices. |
771 |
|
772 |
ext |
773 |
Disk devices will be provided by external shared storage, |
774 |
through the ExtStorage Interface using ExtStorage providers. |
775 |
|
776 |
The optional second value of the ``-n (--node)`` is used for the drbd |
777 |
template type and specifies the remote node. |
778 |
|
779 |
If you do not want gnt-instance to wait for the disk mirror to be |
780 |
synced, use the ``--no-wait-for-sync`` option. |
781 |
|
782 |
The ``--file-storage-dir`` specifies the relative path under the |
783 |
cluster-wide file storage directory to store file-based disks. It is |
784 |
useful for having different subdirectories for different |
785 |
instances. The full path of the directory where the disk files are |
786 |
stored will consist of cluster-wide file storage directory + optional |
787 |
subdirectory + instance name. Example: |
788 |
``@RPL_FILE_STORAGE_DIR@/mysubdir/instance1.example.com``. This |
789 |
option is only relevant for instances using the file storage backend. |
790 |
|
791 |
The ``--file-driver`` specifies the driver to use for file-based |
792 |
disks. Note that currently these drivers work with the xen hypervisor |
793 |
only. This option is only relevant for instances using the file |
794 |
storage backend. The available choices are: |
795 |
|
796 |
loop |
797 |
Kernel loopback driver. This driver uses loopback devices to |
798 |
access the filesystem within the file. However, running I/O |
799 |
intensive applications in your instance using the loop driver |
800 |
might result in slowdowns. Furthermore, if you use the loopback |
801 |
driver consider increasing the maximum amount of loopback devices |
802 |
(on most systems it's 8) using the max\_loop param. |
803 |
|
804 |
blktap |
805 |
The blktap driver (for Xen hypervisors). In order to be able to |
806 |
use the blktap driver you should check if the 'blktapctrl' user |
807 |
space disk agent is running (usually automatically started via |
808 |
xend). This user-level disk I/O interface has the advantage of |
809 |
better performance. Especially if you use a network file system |
810 |
(e.g. NFS) to store your instances this is the recommended choice. |
811 |
|
812 |
If ``--ignore-ipolicy`` is given any instance policy violations occuring |
813 |
during this operation are ignored. |
814 |
|
815 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
816 |
options. |
817 |
|
818 |
Example:: |
819 |
|
820 |
# gnt-instance add -t file --disk 0:size=30g -B maxmem=512 -o debian-etch \ |
821 |
-n node1.example.com --file-storage-dir=mysubdir instance1.example.com |
822 |
# gnt-instance add -t plain --disk 0:size=30g -B maxmem=1024,minmem=512 \ |
823 |
-o debian-etch -n node1.example.com instance1.example.com |
824 |
# gnt-instance add -t plain --disk 0:size=30g --disk 1:size=100g,vg=san \ |
825 |
-B maxmem=512 -o debian-etch -n node1.example.com instance1.example.com |
826 |
# gnt-instance add -t drbd --disk 0:size=30g -B maxmem=512 -o debian-etch \ |
827 |
-n node1.example.com:node2.example.com instance2.example.com |
828 |
# gnt-instance add -t rbd --disk 0:size=30g -B maxmem=512 -o debian-etch \ |
829 |
-n node1.example.com instance1.example.com |
830 |
# gnt-instance add -t ext --disk 0:size=30g,provider=pvdr1 -B maxmem=512 \ |
831 |
-o debian-etch -n node1.example.com instance1.example.com |
832 |
# gnt-instance add -t ext --disk 0:size=30g,provider=pvdr1,param1=val1 \ |
833 |
--disk 1:size=40g,provider=pvdr2,param2=val2,param3=val3 -B maxmem=512 \ |
834 |
-o debian-etch -n node1.example.com instance1.example.com |
835 |
|
836 |
|
837 |
BATCH-CREATE |
838 |
^^^^^^^^^^^^ |
839 |
|
840 |
**batch-create** {instances\_file.json} |
841 |
|
842 |
This command (similar to the Ganeti 1.2 **batcher** tool) submits |
843 |
multiple instance creation jobs based on a definition file. The |
844 |
instance configurations do not encompass all the possible options for |
845 |
the **add** command, but only a subset. |
846 |
|
847 |
The instance file should be a valid-formed JSON file, containing a |
848 |
dictionary with instance name and instance parameters. The accepted |
849 |
parameters are: |
850 |
|
851 |
disk\_size |
852 |
The size of the disks of the instance. |
853 |
|
854 |
disk\_template |
855 |
The disk template to use for the instance, the same as in the |
856 |
**add** command. |
857 |
|
858 |
backend |
859 |
A dictionary of backend parameters. |
860 |
|
861 |
hypervisor |
862 |
A dictionary with a single key (the hypervisor name), and as value |
863 |
the hypervisor options. If not passed, the default hypervisor and |
864 |
hypervisor options will be inherited. |
865 |
|
866 |
mac, ip, mode, link |
867 |
Specifications for the one NIC that will be created for the |
868 |
instance. 'bridge' is also accepted as a backwards compatible |
869 |
key. |
870 |
|
871 |
nics |
872 |
List of NICs that will be created for the instance. Each entry |
873 |
should be a dict, with mac, ip, mode and link as possible keys. |
874 |
Please don't provide the "mac, ip, mode, link" parent keys if you |
875 |
use this method for specifying NICs. |
876 |
|
877 |
primary\_node, secondary\_node |
878 |
The primary and optionally the secondary node to use for the |
879 |
instance (in case an iallocator script is not used). |
880 |
|
881 |
iallocator |
882 |
Instead of specifying the nodes, an iallocator script can be used |
883 |
to automatically compute them. |
884 |
|
885 |
start |
886 |
whether to start the instance |
887 |
|
888 |
ip\_check |
889 |
Skip the check for already-in-use instance; see the description in |
890 |
the **add** command for details. |
891 |
|
892 |
name\_check |
893 |
Skip the name check for instances; see the description in the |
894 |
**add** command for details. |
895 |
|
896 |
file\_storage\_dir, file\_driver |
897 |
Configuration for the file disk type, see the **add** command for |
898 |
details. |
899 |
|
900 |
|
901 |
A simple definition for one instance can be (with most of the |
902 |
parameters taken from the cluster defaults):: |
903 |
|
904 |
{ |
905 |
"instance3": { |
906 |
"template": "drbd", |
907 |
"os": "debootstrap", |
908 |
"disk_size": ["25G"], |
909 |
"iallocator": "dumb" |
910 |
}, |
911 |
"instance5": { |
912 |
"template": "drbd", |
913 |
"os": "debootstrap", |
914 |
"disk_size": ["25G"], |
915 |
"iallocator": "dumb", |
916 |
"hypervisor": "xen-hvm", |
917 |
"hvparams": {"acpi": true}, |
918 |
"backend": {"maxmem": 512, "minmem": 256} |
919 |
} |
920 |
} |
921 |
|
922 |
The command will display the job id for each submitted instance, as |
923 |
follows:: |
924 |
|
925 |
# gnt-instance batch-create instances.json |
926 |
instance3: 11224 |
927 |
instance5: 11225 |
928 |
|
929 |
REMOVE |
930 |
^^^^^^ |
931 |
|
932 |
**remove** [\--ignore-failures] [\--shutdown-timeout=*N*] [\--submit] |
933 |
[\--force] {*instance*} |
934 |
|
935 |
Remove an instance. This will remove all data from the instance and |
936 |
there is *no way back*. If you are not sure if you use an instance |
937 |
again, use **shutdown** first and leave it in the shutdown state for a |
938 |
while. |
939 |
|
940 |
The ``--ignore-failures`` option will cause the removal to proceed |
941 |
even in the presence of errors during the removal of the instance |
942 |
(e.g. during the shutdown or the disk removal). If this option is not |
943 |
given, the command will stop at the first error. |
944 |
|
945 |
The ``--shutdown-timeout`` is used to specify how much time to wait |
946 |
before forcing the shutdown (e.g. ``xm destroy`` in Xen, killing the |
947 |
kvm process for KVM, etc.). By default two minutes are given to each |
948 |
instance to stop. |
949 |
|
950 |
The ``--force`` option is used to skip the interactive confirmation. |
951 |
|
952 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
953 |
options. |
954 |
|
955 |
Example:: |
956 |
|
957 |
# gnt-instance remove instance1.example.com |
958 |
|
959 |
|
960 |
LIST |
961 |
^^^^ |
962 |
|
963 |
| **list** |
964 |
| [\--no-headers] [\--separator=*SEPARATOR*] [\--units=*UNITS*] [-v] |
965 |
| [{-o|\--output} *[+]FIELD,...*] [\--filter] [instance...] |
966 |
|
967 |
Shows the currently configured instances with memory usage, disk |
968 |
usage, the node they are running on, and their run status. |
969 |
|
970 |
The ``--no-headers`` option will skip the initial header line. The |
971 |
``--separator`` option takes an argument which denotes what will be |
972 |
used between the output fields. Both these options are to help |
973 |
scripting. |
974 |
|
975 |
The units used to display the numeric values in the output varies, |
976 |
depending on the options given. By default, the values will be |
977 |
formatted in the most appropriate unit. If the ``--separator`` option |
978 |
is given, then the values are shown in mebibytes to allow parsing by |
979 |
scripts. In both cases, the ``--units`` option can be used to enforce |
980 |
a given output unit. |
981 |
|
982 |
The ``-v`` option activates verbose mode, which changes the display of |
983 |
special field states (see **ganeti**\(7)). |
984 |
|
985 |
The ``-o (--output)`` option takes a comma-separated list of output |
986 |
fields. The available fields and their meaning are: |
987 |
|
988 |
@QUERY_FIELDS_INSTANCE@ |
989 |
|
990 |
If the value of the option starts with the character ``+``, the new |
991 |
field(s) will be added to the default list. This allows one to quickly |
992 |
see the default list plus a few other fields, instead of retyping the |
993 |
entire list of fields. |
994 |
|
995 |
There is a subtle grouping about the available output fields: all |
996 |
fields except for ``oper_state``, ``oper_ram``, ``oper_vcpus`` and |
997 |
``status`` are configuration value and not run-time values. So if you |
998 |
don't select any of the these fields, the query will be satisfied |
999 |
instantly from the cluster configuration, without having to ask the |
1000 |
remote nodes for the data. This can be helpful for big clusters when |
1001 |
you only want some data and it makes sense to specify a reduced set of |
1002 |
output fields. |
1003 |
|
1004 |
If exactly one argument is given and it appears to be a query filter |
1005 |
(see **ganeti**\(7)), the query result is filtered accordingly. For |
1006 |
ambiguous cases (e.g. a single field name as a filter) the ``--filter`` |
1007 |
(``-F``) option forces the argument to be treated as a filter (e.g. |
1008 |
``gnt-instance list -F admin_state``). |
1009 |
|
1010 |
The default output field list is: ``name``, ``os``, ``pnode``, |
1011 |
``admin_state``, ``oper_state``, ``oper_ram``. |
1012 |
|
1013 |
|
1014 |
LIST-FIELDS |
1015 |
^^^^^^^^^^^ |
1016 |
|
1017 |
**list-fields** [field...] |
1018 |
|
1019 |
Lists available fields for instances. |
1020 |
|
1021 |
|
1022 |
INFO |
1023 |
^^^^ |
1024 |
|
1025 |
**info** [-s \| \--static] [\--roman] {\--all \| *instance*} |
1026 |
|
1027 |
Show detailed information about the given instance(s). This is |
1028 |
different from **list** as it shows detailed data about the instance's |
1029 |
disks (especially useful for the drbd disk template). |
1030 |
|
1031 |
If the option ``-s`` is used, only information available in the |
1032 |
configuration file is returned, without querying nodes, making the |
1033 |
operation faster. |
1034 |
|
1035 |
Use the ``--all`` to get info about all instances, rather than |
1036 |
explicitly passing the ones you're interested in. |
1037 |
|
1038 |
The ``--roman`` option can be used to cause envy among people who like |
1039 |
ancient cultures, but are stuck with non-latin-friendly cluster |
1040 |
virtualization technologies. |
1041 |
|
1042 |
MODIFY |
1043 |
^^^^^^ |
1044 |
|
1045 |
| **modify** |
1046 |
| [{-H|\--hypervisor-parameters} *HYPERVISOR\_PARAMETERS*] |
1047 |
| [{-B|\--backend-parameters} *BACKEND\_PARAMETERS*] |
1048 |
| [{-m|\--runtime-memory} *SIZE*] |
1049 |
| [\--net add*[:options]* \| \--net [*N*:]remove \| \--net *N:options*] |
1050 |
| [\--disk add:size=*SIZE*[,vg=*VG*][,metavg=*VG*] \| |
1051 |
| \--disk add:size=*SIZE*,provider=*PROVIDER*[,param=*value*... ] \| |
1052 |
| \--disk [*N*:]remove \| |
1053 |
| \--disk *N*:mode=*MODE*] |
1054 |
| [{-t|\--disk-template} plain | {-t|\--disk-template} drbd -n *new_secondary*] [\--no-wait-for-sync] |
1055 |
| [\--os-type=*OS* [\--force-variant]] |
1056 |
| [{-O|\--os-parameters} *param*=*value*... ] |
1057 |
| [\--offline \| \--online] |
1058 |
| [\--submit] |
1059 |
| [\--ignore-ipolicy] |
1060 |
| {*instance*} |
1061 |
|
1062 |
Modifies the memory size, number of vcpus, ip address, MAC address |
1063 |
and/or NIC parameters for an instance. It can also add and remove |
1064 |
disks and NICs to/from the instance. Note that you need to give at |
1065 |
least one of the arguments, otherwise the command complains. |
1066 |
|
1067 |
The ``-H (--hypervisor-parameters)``, ``-B (--backend-parameters)`` |
1068 |
and ``-O (--os-parameters)`` options specifies hypervisor, backend and |
1069 |
OS parameter options in the form of name=value[,...]. For details |
1070 |
which options can be specified, see the **add** command. |
1071 |
|
1072 |
The ``-t (--disk-template)`` option will change the disk template of |
1073 |
the instance. Currently only conversions between the plain and drbd |
1074 |
disk templates are supported, and the instance must be stopped before |
1075 |
attempting the conversion. When changing from the plain to the drbd |
1076 |
disk template, a new secondary node must be specified via the ``-n`` |
1077 |
option. The option ``--no-wait-for-sync`` can be used when converting |
1078 |
to the ``drbd`` template in order to make the instance available for |
1079 |
startup before DRBD has finished resyncing. |
1080 |
|
1081 |
The ``-m (--runtime-memory)`` option will change an instance's runtime |
1082 |
memory to the given size (in MB if a different suffix is not specified), |
1083 |
by ballooning it up or down to the new value. |
1084 |
|
1085 |
The ``--disk add:size=``*SIZE* option adds a disk to the instance. The |
1086 |
optional ``vg=``*VG* option specifies an LVM volume group other than the |
1087 |
default volume group to create the disk on. For DRBD disks, the |
1088 |
``metavg=``*VG* option specifies the volume group for the metadata |
1089 |
device. When adding an ExtStorage disk the ``provider=``*PROVIDER* |
1090 |
option is also mandatory and specifies the ExtStorage provider. Also, |
1091 |
for ExtStorage disks arbitrary parameters can be passed as additional |
1092 |
comma separated options, same as in the **add** command. ``--disk`` |
1093 |
*N*``:add,size=``**SIZE** can be used to add a disk at a specific index. |
1094 |
The ``--disk remove`` option will remove the last disk of the instance. |
1095 |
Use ``--disk `` *N*``:remove`` to remove a disk by its index. The |
1096 |
``--disk`` *N*``:mode=``*MODE* option will change the mode of the Nth |
1097 |
disk of the instance between read-only (``ro``) and read-write (``rw``). |
1098 |
|
1099 |
The ``--net add:``*options* and ``--net`` *N*``:add,``*options* option |
1100 |
will add a new network interface to the instance. The available options |
1101 |
are the same as in the **add** command (``mac``, ``ip``, ``link``, |
1102 |
``mode``, ``network``). The ``--net remove`` will remove the last network |
1103 |
interface of the instance (``--net`` *N*``:remove`` for a specific index), |
1104 |
while the ``--net`` *N*``:``*options* option will change the parameters of |
1105 |
the Nth instance network interface. |
1106 |
|
1107 |
The option ``-o (--os-type)`` will change the OS name for the instance |
1108 |
(without reinstallation). In case an OS variant is specified that is |
1109 |
not found, then by default the modification is refused, unless |
1110 |
``--force-variant`` is passed. An invalid OS will also be refused, |
1111 |
unless the ``--force`` option is given. |
1112 |
|
1113 |
The ``--online`` and ``--offline`` options are used to transition an |
1114 |
instance into and out of the ``offline`` state. An instance can be |
1115 |
turned offline only if it was previously down. The ``--online`` option |
1116 |
fails if the instance was not in the ``offline`` state, otherwise it |
1117 |
changes instance's state to ``down``. These modifications take effect |
1118 |
immediately. |
1119 |
|
1120 |
If ``--ignore-ipolicy`` is given any instance policy violations occuring |
1121 |
during this operation are ignored. |
1122 |
|
1123 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1124 |
options. |
1125 |
|
1126 |
Most of the changes take effect at the next restart. If the instance is |
1127 |
running, there is no effect on the instance. |
1128 |
|
1129 |
REINSTALL |
1130 |
^^^^^^^^^ |
1131 |
|
1132 |
| **reinstall** [{-o|\--os-type} *os-type*] [\--select-os] [-f *force*] |
1133 |
| [\--force-multiple] |
1134 |
| [\--instance \| \--node \| \--primary \| \--secondary \| \--all] |
1135 |
| [{-O|\--os-parameters} *OS\_PARAMETERS*] [\--submit] {*instance*...} |
1136 |
|
1137 |
Reinstalls the operating system on the given instance(s). The |
1138 |
instance(s) must be stopped when running this command. If the ``-o |
1139 |
(--os-type)`` is specified, the operating system is changed. |
1140 |
|
1141 |
The ``--select-os`` option switches to an interactive OS reinstall. |
1142 |
The user is prompted to select the OS template from the list of |
1143 |
available OS templates. OS parameters can be overridden using ``-O |
1144 |
(--os-parameters)`` (more documentation for this option under the |
1145 |
**add** command). |
1146 |
|
1147 |
Since this is a potentially dangerous command, the user will be |
1148 |
required to confirm this action, unless the ``-f`` flag is passed. |
1149 |
When multiple instances are selected (either by passing multiple |
1150 |
arguments or by using the ``--node``, ``--primary``, ``--secondary`` |
1151 |
or ``--all`` options), the user must pass the ``--force-multiple`` |
1152 |
options to skip the interactive confirmation. |
1153 |
|
1154 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1155 |
options. |
1156 |
|
1157 |
RENAME |
1158 |
^^^^^^ |
1159 |
|
1160 |
| **rename** [\--no-ip-check] [\--no-name-check] [\--submit] |
1161 |
| {*instance*} {*new\_name*} |
1162 |
|
1163 |
Renames the given instance. The instance must be stopped when running |
1164 |
this command. The requirements for the new name are the same as for |
1165 |
adding an instance: the new name must be resolvable and the IP it |
1166 |
resolves to must not be reachable (in order to prevent duplicate IPs |
1167 |
the next time the instance is started). The IP test can be skipped if |
1168 |
the ``--no-ip-check`` option is passed. |
1169 |
|
1170 |
Note that you can rename an instance to its same name, to force |
1171 |
re-executing the os-specific rename script for that instance, if |
1172 |
needed. |
1173 |
|
1174 |
The ``--no-name-check`` skips the check for the new instance name via |
1175 |
the resolver (e.g. in DNS or /etc/hosts, depending on your setup) and |
1176 |
that the resolved name matches the provided name. Since the name check |
1177 |
is used to compute the IP address, if you pass this option you must also |
1178 |
pass the ``--no-ip-check`` option. |
1179 |
|
1180 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1181 |
options. |
1182 |
|
1183 |
Starting/stopping/connecting to console |
1184 |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
1185 |
|
1186 |
STARTUP |
1187 |
^^^^^^^ |
1188 |
|
1189 |
| **startup** |
1190 |
| [\--force] [\--ignore-offline] |
1191 |
| [\--force-multiple] [\--no-remember] |
1192 |
| [\--instance \| \--node \| \--primary \| \--secondary \| \--all \| |
1193 |
| \--tags \| \--node-tags \| \--pri-node-tags \| \--sec-node-tags] |
1194 |
| [{-H|\--hypervisor-parameters} ``key=value...``] |
1195 |
| [{-B|\--backend-parameters} ``key=value...``] |
1196 |
| [\--submit] [\--paused] |
1197 |
| {*name*...} |
1198 |
|
1199 |
Starts one or more instances, depending on the following options. The |
1200 |
four available modes are: |
1201 |
|
1202 |
\--instance |
1203 |
will start the instances given as arguments (at least one argument |
1204 |
required); this is the default selection |
1205 |
|
1206 |
\--node |
1207 |
will start the instances who have the given node as either primary |
1208 |
or secondary |
1209 |
|
1210 |
\--primary |
1211 |
will start all instances whose primary node is in the list of nodes |
1212 |
passed as arguments (at least one node required) |
1213 |
|
1214 |
\--secondary |
1215 |
will start all instances whose secondary node is in the list of |
1216 |
nodes passed as arguments (at least one node required) |
1217 |
|
1218 |
\--all |
1219 |
will start all instances in the cluster (no arguments accepted) |
1220 |
|
1221 |
\--tags |
1222 |
will start all instances in the cluster with the tags given as |
1223 |
arguments |
1224 |
|
1225 |
\--node-tags |
1226 |
will start all instances in the cluster on nodes with the tags |
1227 |
given as arguments |
1228 |
|
1229 |
\--pri-node-tags |
1230 |
will start all instances in the cluster on primary nodes with the |
1231 |
tags given as arguments |
1232 |
|
1233 |
\--sec-node-tags |
1234 |
will start all instances in the cluster on secondary nodes with the |
1235 |
tags given as arguments |
1236 |
|
1237 |
Note that although you can pass more than one selection option, the |
1238 |
last one wins, so in order to guarantee the desired result, don't pass |
1239 |
more than one such option. |
1240 |
|
1241 |
Use ``--force`` to start even if secondary disks are failing. |
1242 |
``--ignore-offline`` can be used to ignore offline primary nodes and |
1243 |
mark the instance as started even if the primary is not available. |
1244 |
|
1245 |
The ``--force-multiple`` will skip the interactive confirmation in the |
1246 |
case the more than one instance will be affected. |
1247 |
|
1248 |
The ``--no-remember`` option will perform the startup but not change |
1249 |
the state of the instance in the configuration file (if it was stopped |
1250 |
before, Ganeti will still think it needs to be stopped). This can be |
1251 |
used for testing, or for a one shot-start where you don't want the |
1252 |
watcher to restart the instance if it crashes. |
1253 |
|
1254 |
The ``-H (--hypervisor-parameters)`` and ``-B (--backend-parameters)`` |
1255 |
options specify temporary hypervisor and backend parameters that can |
1256 |
be used to start an instance with modified parameters. They can be |
1257 |
useful for quick testing without having to modify an instance back and |
1258 |
forth, e.g.:: |
1259 |
|
1260 |
# gnt-instance start -H kernel_args="single" instance1 |
1261 |
# gnt-instance start -B maxmem=2048 instance2 |
1262 |
|
1263 |
|
1264 |
The first form will start the instance instance1 in single-user mode, |
1265 |
and the instance instance2 with 2GB of RAM (this time only, unless |
1266 |
that is the actual instance memory size already). Note that the values |
1267 |
override the instance parameters (and not extend them): an instance |
1268 |
with "kernel\_args=ro" when started with -H kernel\_args=single will |
1269 |
result in "single", not "ro single". |
1270 |
|
1271 |
The ``--paused`` option is only valid for Xen and kvm hypervisors. This |
1272 |
pauses the instance at the start of bootup, awaiting ``gnt-instance |
1273 |
console`` to unpause it, allowing the entire boot process to be |
1274 |
monitored for debugging. |
1275 |
|
1276 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1277 |
options. |
1278 |
|
1279 |
Example:: |
1280 |
|
1281 |
# gnt-instance start instance1.example.com |
1282 |
# gnt-instance start --node node1.example.com node2.example.com |
1283 |
# gnt-instance start --all |
1284 |
|
1285 |
|
1286 |
SHUTDOWN |
1287 |
^^^^^^^^ |
1288 |
|
1289 |
| **shutdown** |
1290 |
| [\--timeout=*N*] |
1291 |
| [\--force] [\--force-multiple] [\--ignore-offline] [\--no-remember] |
1292 |
| [\--instance \| \--node \| \--primary \| \--secondary \| \--all \| |
1293 |
| \--tags \| \--node-tags \| \--pri-node-tags \| \--sec-node-tags] |
1294 |
| [\--submit] |
1295 |
| {*name*...} |
1296 |
|
1297 |
Stops one or more instances. If the instance cannot be cleanly stopped |
1298 |
during a hardcoded interval (currently 2 minutes), it will forcibly |
1299 |
stop the instance (equivalent to switching off the power on a physical |
1300 |
machine). |
1301 |
|
1302 |
The ``--timeout`` is used to specify how much time to wait before |
1303 |
forcing the shutdown (e.g. ``xm destroy`` in Xen, killing the kvm |
1304 |
process for KVM, etc.). By default two minutes are given to each |
1305 |
instance to stop. |
1306 |
|
1307 |
The ``--instance``, ``--node``, ``--primary``, ``--secondary``, |
1308 |
``--all``, ``--tags``, ``--node-tags``, ``--pri-node-tags`` and |
1309 |
``--sec-node-tags`` options are similar as for the **startup** command |
1310 |
and they influence the actual instances being shutdown. |
1311 |
|
1312 |
``--ignore-offline`` can be used to ignore offline primary nodes and |
1313 |
force the instance to be marked as stopped. This option should be used |
1314 |
with care as it can lead to an inconsistent cluster state. |
1315 |
|
1316 |
Use ``--force`` to be able to shutdown an instance even when it's marked |
1317 |
as offline. This is useful is an offline instance ends up in the |
1318 |
``ERROR_up`` state, for example. |
1319 |
|
1320 |
The ``--no-remember`` option will perform the shutdown but not change |
1321 |
the state of the instance in the configuration file (if it was running |
1322 |
before, Ganeti will still thinks it needs to be running). This can be |
1323 |
useful for a cluster-wide shutdown, where some instances are marked as |
1324 |
up and some as down, and you don't want to change the running state: |
1325 |
you just need to disable the watcher, shutdown all instances with |
1326 |
``--no-remember``, and when the watcher is activated again it will |
1327 |
restore the correct runtime state for all instances. |
1328 |
|
1329 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1330 |
options. |
1331 |
|
1332 |
Example:: |
1333 |
|
1334 |
# gnt-instance shutdown instance1.example.com |
1335 |
# gnt-instance shutdown --all |
1336 |
|
1337 |
|
1338 |
REBOOT |
1339 |
^^^^^^ |
1340 |
|
1341 |
| **reboot** |
1342 |
| [{-t|\--type} *REBOOT-TYPE*] |
1343 |
| [\--ignore-secondaries] |
1344 |
| [\--shutdown-timeout=*N*] |
1345 |
| [\--force-multiple] |
1346 |
| [\--instance \| \--node \| \--primary \| \--secondary \| \--all \| |
1347 |
| \--tags \| \--node-tags \| \--pri-node-tags \| \--sec-node-tags] |
1348 |
| [\--submit] |
1349 |
| [*name*...] |
1350 |
|
1351 |
Reboots one or more instances. The type of reboot depends on the value |
1352 |
of ``-t (--type)``. A soft reboot does a hypervisor reboot, a hard reboot |
1353 |
does a instance stop, recreates the hypervisor config for the instance |
1354 |
and starts the instance. A full reboot does the equivalent of |
1355 |
**gnt-instance shutdown && gnt-instance startup**. The default is |
1356 |
hard reboot. |
1357 |
|
1358 |
For the hard reboot the option ``--ignore-secondaries`` ignores errors |
1359 |
for the secondary node while re-assembling the instance disks. |
1360 |
|
1361 |
The ``--instance``, ``--node``, ``--primary``, ``--secondary``, |
1362 |
``--all``, ``--tags``, ``--node-tags``, ``--pri-node-tags`` and |
1363 |
``--sec-node-tags`` options are similar as for the **startup** command |
1364 |
and they influence the actual instances being rebooted. |
1365 |
|
1366 |
The ``--shutdown-timeout`` is used to specify how much time to wait |
1367 |
before forcing the shutdown (xm destroy in xen, killing the kvm |
1368 |
process, for kvm). By default two minutes are given to each instance |
1369 |
to stop. |
1370 |
|
1371 |
The ``--force-multiple`` will skip the interactive confirmation in the |
1372 |
case the more than one instance will be affected. |
1373 |
|
1374 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1375 |
options. |
1376 |
|
1377 |
Example:: |
1378 |
|
1379 |
# gnt-instance reboot instance1.example.com |
1380 |
# gnt-instance reboot --type=full instance1.example.com |
1381 |
|
1382 |
|
1383 |
CONSOLE |
1384 |
^^^^^^^ |
1385 |
|
1386 |
**console** [\--show-cmd] {*instance*} |
1387 |
|
1388 |
Connects to the console of the given instance. If the instance is not |
1389 |
up, an error is returned. Use the ``--show-cmd`` option to display the |
1390 |
command instead of executing it. |
1391 |
|
1392 |
For HVM instances, this will attempt to connect to the serial console |
1393 |
of the instance. To connect to the virtualized "physical" console of a |
1394 |
HVM instance, use a VNC client with the connection info from the |
1395 |
**info** command. |
1396 |
|
1397 |
For Xen/kvm instances, if the instance is paused, this attempts to |
1398 |
unpause the instance after waiting a few seconds for the connection to |
1399 |
the console to be made. |
1400 |
|
1401 |
Example:: |
1402 |
|
1403 |
# gnt-instance console instance1.example.com |
1404 |
|
1405 |
|
1406 |
Disk management |
1407 |
~~~~~~~~~~~~~~~ |
1408 |
|
1409 |
REPLACE-DISKS |
1410 |
^^^^^^^^^^^^^ |
1411 |
|
1412 |
**replace-disks** [\--submit] [\--early-release] [\--ignore-ipolicy] {-p} |
1413 |
[\--disks *idx*] {*instance*} |
1414 |
|
1415 |
**replace-disks** [\--submit] [\--early-release] [\--ignore-ipolicy] {-s} |
1416 |
[\--disks *idx*] {*instance*} |
1417 |
|
1418 |
**replace-disks** [\--submit] [\--early-release] [\--ignore-ipolicy] |
1419 |
{{-I\|\--iallocator} *name* \| {{-n|\--new-secondary} *node* } {*instance*} |
1420 |
|
1421 |
**replace-disks** [\--submit] [\--early-release] [\--ignore-ipolicy] |
1422 |
{-a\|\--auto} {*instance*} |
1423 |
|
1424 |
This command is a generalized form for replacing disks. It is |
1425 |
currently only valid for the mirrored (DRBD) disk template. |
1426 |
|
1427 |
The first form (when passing the ``-p`` option) will replace the disks |
1428 |
on the primary, while the second form (when passing the ``-s`` option |
1429 |
will replace the disks on the secondary node. For these two cases (as |
1430 |
the node doesn't change), it is possible to only run the replace for a |
1431 |
subset of the disks, using the option ``--disks`` which takes a list |
1432 |
of comma-delimited disk indices (zero-based), e.g. 0,2 to replace only |
1433 |
the first and third disks. |
1434 |
|
1435 |
The third form (when passing either the ``--iallocator`` or the |
1436 |
``--new-secondary`` option) is designed to change secondary node of the |
1437 |
instance. Specifying ``--iallocator`` makes the new secondary be |
1438 |
selected automatically by the specified allocator plugin (use ``.`` to |
1439 |
indicate the default allocator), otherwise the new secondary node will |
1440 |
be the one chosen manually via the ``--new-secondary`` option. |
1441 |
|
1442 |
Note that it is not possible to select an offline or drained node as a |
1443 |
new secondary. |
1444 |
|
1445 |
The fourth form (when using ``--auto``) will automatically determine |
1446 |
which disks of an instance are faulty and replace them within the same |
1447 |
node. The ``--auto`` option works only when an instance has only |
1448 |
faulty disks on either the primary or secondary node; it doesn't work |
1449 |
when both sides have faulty disks. |
1450 |
|
1451 |
The ``--early-release`` changes the code so that the old storage on |
1452 |
secondary node(s) is removed early (before the resync is completed) |
1453 |
and the internal Ganeti locks for the current (and new, if any) |
1454 |
secondary node are also released, thus allowing more parallelism in |
1455 |
the cluster operation. This should be used only when recovering from a |
1456 |
disk failure on the current secondary (thus the old storage is already |
1457 |
broken) or when the storage on the primary node is known to be fine |
1458 |
(thus we won't need the old storage for potential recovery). |
1459 |
|
1460 |
The ``--ignore-ipolicy`` let the command ignore instance policy |
1461 |
violations if replace-disks changes groups and the instance would |
1462 |
violate the new groups instance policy. |
1463 |
|
1464 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1465 |
options. |
1466 |
|
1467 |
ACTIVATE-DISKS |
1468 |
^^^^^^^^^^^^^^ |
1469 |
|
1470 |
**activate-disks** [\--submit] [\--ignore-size] [\--wait-for-sync] {*instance*} |
1471 |
|
1472 |
Activates the block devices of the given instance. If successful, the |
1473 |
command will show the location and name of the block devices:: |
1474 |
|
1475 |
node1.example.com:disk/0:/dev/drbd0 |
1476 |
node1.example.com:disk/1:/dev/drbd1 |
1477 |
|
1478 |
|
1479 |
In this example, *node1.example.com* is the name of the node on which |
1480 |
the devices have been activated. The *disk/0* and *disk/1* are the |
1481 |
Ganeti-names of the instance disks; how they are visible inside the |
1482 |
instance is hypervisor-specific. */dev/drbd0* and */dev/drbd1* are the |
1483 |
actual block devices as visible on the node. |
1484 |
|
1485 |
The ``--ignore-size`` option can be used to activate disks ignoring |
1486 |
the currently configured size in Ganeti. This can be used in cases |
1487 |
where the configuration has gotten out of sync with the real-world |
1488 |
(e.g. after a partially-failed grow-disk operation or due to rounding |
1489 |
in LVM devices). This should not be used in normal cases, but only |
1490 |
when activate-disks fails without it. |
1491 |
|
1492 |
The ``--wait-for-sync`` option will ensure that the command returns only |
1493 |
after the instance's disks are synchronised (mostly for DRBD); this can |
1494 |
be useful to ensure consistency, as otherwise there are no commands that |
1495 |
can wait until synchronisation is done. However when passing this |
1496 |
option, the command will have additional output, making it harder to |
1497 |
parse the disk information. |
1498 |
|
1499 |
Note that it is safe to run this command while the instance is already |
1500 |
running. |
1501 |
|
1502 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1503 |
options. |
1504 |
|
1505 |
DEACTIVATE-DISKS |
1506 |
^^^^^^^^^^^^^^^^ |
1507 |
|
1508 |
**deactivate-disks** [-f] [\--submit] {*instance*} |
1509 |
|
1510 |
De-activates the block devices of the given instance. Note that if you |
1511 |
run this command for an instance with a drbd disk template, while it |
1512 |
is running, it will not be able to shutdown the block devices on the |
1513 |
primary node, but it will shutdown the block devices on the secondary |
1514 |
nodes, thus breaking the replication. |
1515 |
|
1516 |
The ``-f``/``--force`` option will skip checks that the instance is |
1517 |
down; in case the hypervisor is confused and we can't talk to it, |
1518 |
normally Ganeti will refuse to deactivate the disks, but with this |
1519 |
option passed it will skip this check and directly try to deactivate |
1520 |
the disks. This can still fail due to the instance actually running or |
1521 |
other issues. |
1522 |
|
1523 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1524 |
options. |
1525 |
|
1526 |
GROW-DISK |
1527 |
^^^^^^^^^ |
1528 |
|
1529 |
| **grow-disk** [\--no-wait-for-sync] [\--submit] [\--absolute] |
1530 |
| {*instance*} {*disk*} {*amount*} |
1531 |
|
1532 |
Grows an instance's disk. This is only possible for instances having a |
1533 |
plain, drbd, file, sharedfile, rbd or ext disk template. For the ext |
1534 |
template to work, the ExtStorage provider should also support growing. |
1535 |
This means having a ``grow`` script that actually grows the volume of |
1536 |
the external shared storage. |
1537 |
|
1538 |
Note that this command only change the block device size; it will not |
1539 |
grow the actual filesystems, partitions, etc. that live on that |
1540 |
disk. Usually, you will need to: |
1541 |
|
1542 |
#. use **gnt-instance grow-disk** |
1543 |
|
1544 |
#. reboot the instance (later, at a convenient time) |
1545 |
|
1546 |
#. use a filesystem resizer, such as **ext2online**\(8) or |
1547 |
**xfs\_growfs**\(8) to resize the filesystem, or use **fdisk**\(8) to |
1548 |
change the partition table on the disk |
1549 |
|
1550 |
The *disk* argument is the index of the instance disk to grow. The |
1551 |
*amount* argument is given as a number which can have a suffix (like the |
1552 |
disk size in instance create); if the suffix is missing, the value will |
1553 |
be interpreted as mebibytes. |
1554 |
|
1555 |
By default, the *amount* value represents the desired increase in the |
1556 |
disk size (e.g. an amount of 1G will take a disk of size 3G to 4G). If |
1557 |
the optional ``--absolute`` parameter is passed, then the *amount* |
1558 |
argument doesn't represent the delta, but instead the desired final disk |
1559 |
size (e.g. an amount of 8G will take a disk of size 4G to 8G). |
1560 |
|
1561 |
For instances with a drbd template, note that the disk grow operation |
1562 |
might complete on one node but fail on the other; this will leave the |
1563 |
instance with different-sized LVs on the two nodes, but this will not |
1564 |
create problems (except for unused space). |
1565 |
|
1566 |
If you do not want gnt-instance to wait for the new disk region to be |
1567 |
synced, use the ``--no-wait-for-sync`` option. |
1568 |
|
1569 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1570 |
options. |
1571 |
|
1572 |
Example (increase the first disk for instance1 by 16GiB):: |
1573 |
|
1574 |
# gnt-instance grow-disk instance1.example.com 0 16g |
1575 |
|
1576 |
Example for increasing the disk size to a certain size:: |
1577 |
|
1578 |
# gnt-instance grow-disk --absolute instance1.example.com 0 32g |
1579 |
|
1580 |
Also note that disk shrinking is not supported; use **gnt-backup |
1581 |
export** and then **gnt-backup import** to reduce the disk size of an |
1582 |
instance. |
1583 |
|
1584 |
RECREATE-DISKS |
1585 |
^^^^^^^^^^^^^^ |
1586 |
|
1587 |
| **recreate-disks** [\--submit] |
1588 |
| [{-n node1:[node2] \| {-I\|\--iallocator *name*}}] |
1589 |
| [\--disk=*N*[:[size=*VAL*][,mode=*ro\|rw*]]] {*instance*} |
1590 |
|
1591 |
Recreates all or a subset of disks of the given instance. |
1592 |
|
1593 |
Note that this functionality should only be used for missing disks; if |
1594 |
any of the given disks already exists, the operation will fail. While |
1595 |
this is suboptimal, recreate-disks should hopefully not be needed in |
1596 |
normal operation and as such the impact of this is low. |
1597 |
|
1598 |
If only a subset should be recreated, any number of ``disk`` options can |
1599 |
be specified. It expects a disk index and an optional list of disk |
1600 |
parameters to change. Only ``size`` and ``mode`` can be changed while |
1601 |
recreating disks. To recreate all disks while changing parameters on |
1602 |
a subset only, a ``--disk`` option must be given for every disk of the |
1603 |
instance. |
1604 |
|
1605 |
Optionally the instance's disks can be recreated on different |
1606 |
nodes. This can be useful if, for example, the original nodes of the |
1607 |
instance have gone down (and are marked offline), so we can't recreate |
1608 |
on the same nodes. To do this, pass the new node(s) via ``-n`` option, |
1609 |
with a syntax similar to the **add** command. The number of nodes |
1610 |
passed must equal the number of nodes that the instance currently |
1611 |
has. Note that changing nodes is only allowed when all disks are |
1612 |
replaced, e.g. when no ``--disk`` option is passed. |
1613 |
|
1614 |
Another method of choosing which nodes to place the instance on is by |
1615 |
using the specified iallocator, passing the ``--iallocator`` option. |
1616 |
The primary and secondary nodes will be chosen by the specified |
1617 |
iallocator plugin, or by the default allocator if ``.`` is specified. |
1618 |
|
1619 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1620 |
options. |
1621 |
|
1622 |
Recovery/moving |
1623 |
~~~~~~~~~~~~~~~ |
1624 |
|
1625 |
FAILOVER |
1626 |
^^^^^^^^ |
1627 |
|
1628 |
| **failover** [-f] [\--ignore-consistency] [\--ignore-ipolicy] |
1629 |
| [\--shutdown-timeout=*N*] |
1630 |
| [{-n|\--target-node} *node* \| {-I|\--iallocator} *name*] |
1631 |
| [\--submit] |
1632 |
| {*instance*} |
1633 |
|
1634 |
Failover will stop the instance (if running), change its primary node, |
1635 |
and if it was originally running it will start it again (on the new |
1636 |
primary). This works for instances with drbd template (in which case you |
1637 |
can only fail to the secondary node) and for externally mirrored |
1638 |
templates (sharedfile, blockdev, rbd and ext) (in which case you can |
1639 |
fail to any other node). |
1640 |
|
1641 |
If the instance's disk template is of type sharedfile, blockdev, rbd or |
1642 |
ext, then you can explicitly specify the target node (which can be any |
1643 |
node) using the ``-n`` or ``--target-node`` option, or specify an |
1644 |
iallocator plugin using the ``-I`` or ``--iallocator`` option. If you |
1645 |
omit both, the default iallocator will be used to specify the target |
1646 |
node. |
1647 |
|
1648 |
If the instance's disk template is of type drbd, the target node is |
1649 |
automatically selected as the drbd's secondary node. Changing the |
1650 |
secondary node is possible with a replace-disks operation. |
1651 |
|
1652 |
Normally the failover will check the consistency of the disks before |
1653 |
failing over the instance. If you are trying to migrate instances off |
1654 |
a dead node, this will fail. Use the ``--ignore-consistency`` option |
1655 |
for this purpose. Note that this option can be dangerous as errors in |
1656 |
shutting down the instance will be ignored, resulting in possibly |
1657 |
having the instance running on two machines in parallel (on |
1658 |
disconnected DRBD drives). |
1659 |
|
1660 |
The ``--shutdown-timeout`` is used to specify how much time to wait |
1661 |
before forcing the shutdown (xm destroy in xen, killing the kvm |
1662 |
process, for kvm). By default two minutes are given to each instance |
1663 |
to stop. |
1664 |
|
1665 |
If ``--ignore-ipolicy`` is given any instance policy violations occuring |
1666 |
during this operation are ignored. |
1667 |
|
1668 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1669 |
options. |
1670 |
|
1671 |
Example:: |
1672 |
|
1673 |
# gnt-instance failover instance1.example.com |
1674 |
|
1675 |
For externally mirrored templates also ``-n`` is available:: |
1676 |
|
1677 |
# gnt-instance failover -n node3.example.com instance1.example.com |
1678 |
|
1679 |
|
1680 |
MIGRATE |
1681 |
^^^^^^^ |
1682 |
|
1683 |
| **migrate** [-f] [\--allow-failover] [\--non-live] |
1684 |
| [\--migration-mode=live\|non-live] [\--ignore-ipolicy] |
1685 |
| [\--no-runtime-changes] [\--submit] |
1686 |
| [{-n|\--target-node} *node* \| {-I|\--iallocator} *name*] {*instance*} |
1687 |
|
1688 |
| **migrate** [-f] \--cleanup [\--submit] {*instance*} |
1689 |
|
1690 |
Migrate will move the instance to its secondary node without shutdown. |
1691 |
As with failover, it works for instances having the drbd disk template |
1692 |
or an externally mirrored disk template type such as sharedfile, |
1693 |
blockdev, rbd or ext. |
1694 |
|
1695 |
If the instance's disk template is of type sharedfile, blockdev, rbd or |
1696 |
ext, then you can explicitly specify the target node (which can be any |
1697 |
node) using the ``-n`` or ``--target-node`` option, or specify an |
1698 |
iallocator plugin using the ``-I`` or ``--iallocator`` option. If you |
1699 |
omit both, the default iallocator will be used to specify the target |
1700 |
node. Alternatively, the default iallocator can be requested by |
1701 |
specifying ``.`` as the name of the plugin. |
1702 |
|
1703 |
If the instance's disk template is of type drbd, the target node is |
1704 |
automatically selected as the drbd's secondary node. Changing the |
1705 |
secondary node is possible with a replace-disks operation. |
1706 |
|
1707 |
The migration command needs a perfectly healthy instance for drbd |
1708 |
instances, as we rely on the dual-master capability of drbd8 and the |
1709 |
disks of the instance are not allowed to be degraded. |
1710 |
|
1711 |
The ``--non-live`` and ``--migration-mode=non-live`` options will |
1712 |
switch (for the hypervisors that support it) between a "fully live" |
1713 |
(i.e. the interruption is as minimal as possible) migration and one in |
1714 |
which the instance is frozen, its state saved and transported to the |
1715 |
remote node, and then resumed there. This all depends on the |
1716 |
hypervisor support for two different methods. In any case, it is not |
1717 |
an error to pass this parameter (it will just be ignored if the |
1718 |
hypervisor doesn't support it). The option ``--migration-mode=live`` |
1719 |
option will request a fully-live migration. The default, when neither |
1720 |
option is passed, depends on the hypervisor parameters (and can be |
1721 |
viewed with the **gnt-cluster info** command). |
1722 |
|
1723 |
If the ``--cleanup`` option is passed, the operation changes from |
1724 |
migration to attempting recovery from a failed previous migration. In |
1725 |
this mode, Ganeti checks if the instance runs on the correct node (and |
1726 |
updates its configuration if not) and ensures the instances' disks |
1727 |
are configured correctly. In this mode, the ``--non-live`` option is |
1728 |
ignored. |
1729 |
|
1730 |
The option ``-f`` will skip the prompting for confirmation. |
1731 |
|
1732 |
If ``--allow-failover`` is specified it tries to fallback to failover if |
1733 |
it already can determine that a migration won't work (e.g. if the |
1734 |
instance is shut down). Please note that the fallback will not happen |
1735 |
during execution. If a migration fails during execution it still fails. |
1736 |
|
1737 |
If ``--ignore-ipolicy`` is given any instance policy violations occuring |
1738 |
during this operation are ignored. |
1739 |
|
1740 |
The ``--no-runtime-changes`` option forbids migrate to alter an |
1741 |
instance's runtime before migrating it (eg. ballooning an instance |
1742 |
down because the target node doesn't have enough available memory). |
1743 |
|
1744 |
If an instance has the backend parameter ``always_failover`` set to |
1745 |
true, then the migration is automatically converted into a failover. |
1746 |
|
1747 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1748 |
options. |
1749 |
|
1750 |
Example (and expected output):: |
1751 |
|
1752 |
# gnt-instance migrate instance1 |
1753 |
Instance instance1 will be migrated. Note that migration |
1754 |
might impact the instance if anything goes wrong (e.g. due to bugs in |
1755 |
the hypervisor). Continue? |
1756 |
y/[n]/?: y |
1757 |
Migrating instance instance1.example.com |
1758 |
* checking disk consistency between source and target |
1759 |
* switching node node2.example.com to secondary mode |
1760 |
* changing into standalone mode |
1761 |
* changing disks into dual-master mode |
1762 |
* wait until resync is done |
1763 |
* preparing node2.example.com to accept the instance |
1764 |
* migrating instance to node2.example.com |
1765 |
* switching node node1.example.com to secondary mode |
1766 |
* wait until resync is done |
1767 |
* changing into standalone mode |
1768 |
* changing disks into single-master mode |
1769 |
* wait until resync is done |
1770 |
* done |
1771 |
# |
1772 |
|
1773 |
|
1774 |
MOVE |
1775 |
^^^^ |
1776 |
|
1777 |
| **move** [-f] [\--ignore-consistency] |
1778 |
| [-n *node*] [\--shutdown-timeout=*N*] [\--submit] [\--ignore-ipolicy] |
1779 |
| {*instance*} |
1780 |
|
1781 |
Move will move the instance to an arbitrary node in the cluster. This |
1782 |
works only for instances having a plain or file disk template. |
1783 |
|
1784 |
Note that since this operation is done via data copy, it will take a |
1785 |
long time for big disks (similar to replace-disks for a drbd |
1786 |
instance). |
1787 |
|
1788 |
The ``--shutdown-timeout`` is used to specify how much time to wait |
1789 |
before forcing the shutdown (e.g. ``xm destroy`` in XEN, killing the |
1790 |
kvm process for KVM, etc.). By default two minutes are given to each |
1791 |
instance to stop. |
1792 |
|
1793 |
The ``--ignore-consistency`` option will make Ganeti ignore any errors |
1794 |
in trying to shutdown the instance on its node; useful if the |
1795 |
hypervisor is broken and you want to recover the data. |
1796 |
|
1797 |
If ``--ignore-ipolicy`` is given any instance policy violations occuring |
1798 |
during this operation are ignored. |
1799 |
|
1800 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1801 |
options. |
1802 |
|
1803 |
Example:: |
1804 |
|
1805 |
# gnt-instance move -n node3.example.com instance1.example.com |
1806 |
|
1807 |
|
1808 |
CHANGE-GROUP |
1809 |
^^^^^^^^^^^^ |
1810 |
|
1811 |
| **change-group** [\--submit] |
1812 |
| [\--iallocator *NAME*] [\--to *GROUP*...] {*instance*} |
1813 |
|
1814 |
This command moves an instance to another node group. The move is |
1815 |
calculated by an iallocator, either given on the command line or as a |
1816 |
cluster default. |
1817 |
|
1818 |
If no specific destination groups are specified using ``--to``, all |
1819 |
groups except the one containing the instance are considered. |
1820 |
|
1821 |
See **ganeti**\(7) for a description of ``--submit`` and other common |
1822 |
options. |
1823 |
|
1824 |
Example:: |
1825 |
|
1826 |
# gnt-instance change-group -I hail --to rack2 inst1.example.com |
1827 |
|
1828 |
|
1829 |
Tags |
1830 |
~~~~ |
1831 |
|
1832 |
ADD-TAGS |
1833 |
^^^^^^^^ |
1834 |
|
1835 |
**add-tags** [\--from *file*] {*instancename*} {*tag*...} |
1836 |
|
1837 |
Add tags to the given instance. If any of the tags contains invalid |
1838 |
characters, the entire operation will abort. |
1839 |
|
1840 |
If the ``--from`` option is given, the list of tags will be extended |
1841 |
with the contents of that file (each line becomes a tag). In this |
1842 |
case, there is not need to pass tags on the command line (if you do, |
1843 |
both sources will be used). A file name of ``-`` will be interpreted |
1844 |
as stdin. |
1845 |
|
1846 |
LIST-TAGS |
1847 |
^^^^^^^^^ |
1848 |
|
1849 |
**list-tags** {*instancename*} |
1850 |
|
1851 |
List the tags of the given instance. |
1852 |
|
1853 |
REMOVE-TAGS |
1854 |
^^^^^^^^^^^ |
1855 |
|
1856 |
**remove-tags** [\--from *file*] {*instancename*} {*tag*...} |
1857 |
|
1858 |
Remove tags from the given instance. If any of the tags are not |
1859 |
existing on the node, the entire operation will abort. |
1860 |
|
1861 |
If the ``--from`` option is given, the list of tags to be removed will |
1862 |
be extended with the contents of that file (each line becomes a tag). |
1863 |
In this case, there is not need to pass tags on the command line (if |
1864 |
you do, tags from both sources will be removed). A file name of ``-`` |
1865 |
will be interpreted as stdin. |
1866 |
|
1867 |
.. vim: set textwidth=72 : |
1868 |
.. Local Variables: |
1869 |
.. mode: rst |
1870 |
.. fill-column: 72 |
1871 |
.. End: |