<!-- Fill in your name for FIRSTNAME and SURNAME. -->
<!-- Please adjust the date whenever revising the manpage. -->
- <!ENTITY dhdate "<date>May 16, 2007</date>">
+ <!ENTITY dhdate "<date>February 11, 2009</date>">
<!-- SECTION should be 1-8, maybe w/ subsection other parameters are
allowed: see man(7), man(1). -->
<!ENTITY dhsection "<manvolnum>8</manvolnum>">
<copyright>
<year>2006</year>
<year>2007</year>
+ <year>2008</year>
+ <year>2009</year>
<holder>Google Inc.</holder>
</copyright>
&dhdate;
&dhucpackage;
&dhsection;
- <refmiscinfo>ganeti 1.2</refmiscinfo>
+ <refmiscinfo>ganeti 2.0</refmiscinfo>
</refmeta>
<refnamediv>
<refname>&dhpackage;</refname>
<title>ADD</title>
<cmdsynopsis>
<command>add</command>
- <arg>-s <replaceable>disksize</replaceable></arg>
- <arg>--swap-size <replaceable>disksize</replaceable></arg>
- <arg>-m <replaceable>memsize</replaceable></arg>
<sbr>
- <arg>-o <replaceable>os-type</replaceable></arg>
- <arg>-b <replaceable>bridge</replaceable></arg>
- <sbr>
- <arg choice="req">-t<group>
+ <arg choice="req">-t<group choice="req">
<arg>diskless</arg>
+ <arg>file</arg>
<arg>plain</arg>
- <arg>local_raid1</arg>
- <arg>remote_raid1</arg>
<arg>drbd</arg>
- </group>
- </arg>
+ </group></arg>
+ <sbr>
+
+ <group choice="req">
+ <arg rep="repeat">--disk=<replaceable>N</replaceable>:size=<replaceable>VAL</replaceable><arg>,mode=<replaceable>ro|rw</replaceable></arg></arg>
+ <arg>-s <replaceable>SIZE</replaceable></arg>
+ </group>
+ <sbr>
+ <group>
+ <arg rep="repeat">--net=<replaceable>N</replaceable><arg rep="repeat">:options</arg></arg>
+ <arg>--no-nics</arg>
+ </group>
+ <sbr>
+ <arg>-B <replaceable>BEPARAMS</replaceable></arg>
+ <sbr>
+
+ <arg>-H <replaceable>HYPERVISOR</replaceable><arg>:<arg choice="plain" rep="repeat">option=<replaceable>value</replaceable></arg></arg></arg>
+ <sbr>
+
+ <arg>--file-storage-dir <replaceable>dir_path</replaceable></arg>
+ <arg>--file-driver<group choice="req">
+ <arg>loop</arg>
+ <arg>blktap</arg>
+ </group></arg>
+ <sbr>
+
+ <group choice="req">
+ <arg>-n <replaceable>node<optional>:secondary-node</optional></replaceable></arg>
+ <arg>--iallocator <replaceable>name</replaceable></arg>
+ </group>
+ <sbr>
+
+ <arg choice="req">-o <replaceable>os-type</replaceable></arg>
<sbr>
- <arg choice="req">-n <replaceable>node<optional>:secondary-node</optional></replaceable></arg>
+ <arg>--submit</arg>
+ <sbr>
+
<arg choice="req"><replaceable>instance</replaceable></arg>
</cmdsynopsis>
+
<para>
- Creates a new instance on the specified
- host. <replaceable>instance</replaceable> must be in DNS and
- resolve to a IP in the same network as the nodes in the
- cluster.
+ Creates a new instance on the specified host. The
+ <replaceable>instance</replaceable> argument must be in DNS,
+ but depending on the bridge setup, need not be in the same
+ network as the nodes in the cluster.
</para>
<para>
- The <option>-s</option> option specifies the disk size for
- the instance, in mebibytes (defaults to
- <constant>20480MiB</constant> =
- <constant>20GiB</constant>). You can also use one of the
- suffixes <literal>m</literal>, <literal>g</literal> or
+ The <option>disk</option> option specifies the parameters
+ for the disks of the instance. The numbering of disks starts
+ at zero, and at least one disk needs to be passed. For each
+ disk, at least the size needs to be given, and optionally
+ the access mode (read-only or the default of read-write) can
+ also be specified. The size is interpreted (when no unit is
+ given) in mebibytes. You can also use one of the suffixes
+ <literal>m</literal>, <literal>g</literal> or
<literal>t</literal> to specificy the exact the units used;
these suffixes map to mebibytes, gibibytes and tebibytes.
</para>
<para>
- The <option>--swap-size</option> option specifies the swap
- disk size (in mebibytes) for the instance (the one presented
- as <filename class="devicefile">/dev/sdb</filename>). The
- default is <constant>4096MiB</constant>. As for the disk
- size, you can specify other suffixes.
+ Alternatively, a single-disk instance can be created via the
+ <option>-s</option> option which takes a single argument,
+ the size of the disk. This is similar to the Ganeti 1.2
+ version (but will only create one disk).
+ </para>
+
+ <para>
+ The minimum disk specification is therefore
+ <userinput>--disk 0:size=20G</userinput> (or <userinput>-s
+ 20G</userinput> when using the <option>-s</option> option),
+ and a three-disk instance can be specified as
+ <userinput>--disk 0:size=20G --disk 1:size=4G --disk
+ 2:size=100G</userinput>.
+ </para>
+
+ <para>
+ The NICs of the instances can be specified via the
+ <option>--nic</option> option. By default, one NIC is
+ created for the instance, with a random MAC, and connected
+ to the default bridge. Each NIC can take up to three
+ parameters (all optional):
+ <variablelist>
+ <varlistentry>
+ <term>mac</term>
+ <listitem>
+ <simpara>either a value or <constant>GENERATE</constant>
+ to generate a new unique MAC</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>ip</term>
+ <listitem>
+ <simpara>specifies the IP address assigned to the
+ instance from the Ganeti side (this is not necessarily
+ what the instance will use, but what the node expects
+ the instance to use)</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>bridge</term>
+ <listitem>
+ <simpara>specifies the bridge to attach this NIC
+ to</simpara>
+ </listitem>
+ </varlistentry>
+ </variablelist>
</para>
<para>
- The <option>-m</option> option specifies the memory size for
- the instance, in mebibytes (defaults to 128 MiB). Again, you
- can use other suffixes (e.g. <userinput>2g</userinput>).
+ Alternatively, if no network is desired for the instance, you
+ can prevent the default of one NIC with the
+ <option>--no-nics</option> option.
</para>
<para>
</para>
<para>
- The <option>-b</option> option specifies the bridge to which the
- instance will be connected. (defaults to the cluster-wide default
- bridge specified at cluster initialization time).
+ The <option>-B</option> option specifies the backend
+ parameters for the instance. If no such parameters are
+ specified, the values are inherited from the cluster. Possible
+ parameters are:
+ <variablelist>
+ <varlistentry>
+ <term>memory</term>
+ <listitem>
+ <simpara>the memory size of the instance; as usual,
+ suffixes can be used to denote the unit, otherwise the
+ value is taken in mebibites</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>vcpus</term>
+ <listitem>
+ <simpara>the number of VCPUs to assign to the instance
+ (if this value makes sense for the hypervisor)</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>auto_balance</term>
+ <listitem>
+ <simpara>whether the instance is considered in the N+1
+ cluster checks (enough redundancy in the cluster to
+ survive a node failure)</simpara>
+ </listitem>
+ </varlistentry>
+ </variablelist>
</para>
<para>
- The <option>-t</option> options specifies the disk layout type for
- the instance. The available choices are:
+ The <option>-H</option> option specified the hypervisor to
+ use for the instance (must be one of the enabled hypervisors
+ on the cluster) and optionally custom parameters for this
+ instance. If not other options are used (i.e. the invocation
+ is just <userinput>-H
+ <replaceable>NAME</replaceable></userinput>) the instance
+ will inherit the cluster options. The defaults below show
+ the cluster defaults at cluster creation time.
+ </para>
+
+ <para>
+ The possible hypervisor options are as follows:
<variablelist>
<varlistentry>
- <term>diskless</term>
+ <term>boot_order</term>
+ <listitem>
+ <simpara>Valid for the Xen HVM and KVM
+ hypervisors.</simpara>
+
+ <simpara>A string value denoting the boot order. This
+ has different meaning for the Xen HVM hypervisor and
+ for the KVM one.</simpara>
+
+ <simpara>
+ For Xen HVM, The boot order is a string of letters
+ listing the boot devices, with valid device letters
+ being:
+ </simpara>
+ <variablelist>
+ <varlistentry>
+ <term>a</term>
+ <listitem>
+ <para>
+ floppy drive
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>c</term>
+ <listitem>
+ <para>
+ hard disk
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>d</term>
+ <listitem>
+ <para>
+ CDROM drive
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>n</term>
+ <listitem>
+ <para>
+ network boot (PXE)
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <simpara>
+ The default is not to set an HVM boot order which is
+ interpreted as 'dc'.
+ </simpara>
+
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>cdrom_image_path</term>
<listitem>
+ <simpara>Valid for the Xen HVM and KVM hypervisors.</simpara>
+
+ <simpara>The path to a CDROM image to attach to the
+ instance.</simpara>
+
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>nic_type</term>
+ <listitem>
+ <simpara>Valid for the Xen HVM and KVM hypervisors.</simpara>
+
<para>
- This creates an instance with no disks. Its useful for
- testing only (or other special cases).
+ This parameter determines the way the network cards
+ are presented to the instance. The possible options are:
+ <simplelist>
+ <member>rtl8139 (default for Xen HVM) (HVM & KVM)</member>
+ <member>ne2k_isa (HVM & KVM)</member>
+ <member>ne2k_pci (HVM & KVM)</member>
+ <member>i82551 (KVM)</member>
+ <member>i82557b (KVM)</member>
+ <member>i82559er (KVM)</member>
+ <member>pcnet (KVM)</member>
+ <member>e1000 (KVM)</member>
+ <member>paravirtual (default for KVM) (HVM & KVM)</member>
+ </simplelist>
</para>
</listitem>
</varlistentry>
<varlistentry>
- <term>plain</term>
+ <term>disk_type</term>
<listitem>
- <para>Disk devices will be logical volumes.</para>
+ <simpara>Valid for the Xen HVM and KVM hypervisors.</simpara>
+
+ <para>
+ This parameter determines the way the disks are
+ presented to the instance. The possible options are:
+ <simplelist>
+ <member>ioemu (default for HVM & KVM) (HVM & KVM)</member>
+ <member>ide (HVM & KVM)</member>
+ <member>scsi (KVM)</member>
+ <member>sd (KVM)</member>
+ <member>mtd (KVM)</member>
+ <member>pflash (KVM)</member>
+ </simplelist>
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>vnc_bind_address</term>
+ <listitem>
+ <simpara>Valid for the Xen HVM and KVM hypervisors.</simpara>
+
+ <para>Specifies the address that the VNC listener for
+ this instance should bind to. Valid values are IPv4
+ addresses. Use the address 0.0.0.0 to bind to all
+ available interfaces (this is the default) or specify
+ the address of one of the interfaces on the node to
+ restrict listening to that interface.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>vnc_tls</term>
+ <listitem>
+ <simpara>Valid for the KVM hypervisor.</simpara>
+
+ <simpara>A boolean option that controls whether the
+ VNC connection is secured with TLS.</simpara>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>vnc_x509_path</term>
+ <listitem>
+ <simpara>Valid for the KVM hypervisor.</simpara>
+
+ <para>If <option>vnc_tls</option> is enabled, this
+ options specifies the path to the x509 certificate to
+ use.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>vnc_x509_verify</term>
+ <listitem>
+ <simpara>Valid for the KVM hypervisor.</simpara>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>acpi</term>
+ <listitem>
+ <simpara>Valid for the Xen HVM and KVM hypervisors.</simpara>
+
+ <para>
+ A boolean option that specifies if the hypervisor
+ should enable ACPI support for this instance. By
+ default, ACPI is disabled.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>pae</term>
+ <listitem>
+ <simpara>Valid for the Xen HVM and KVM hypervisors.</simpara>
+
+ <para>
+ A boolean option that specifies if the hypervisor
+ should enabled PAE support for this instance. The
+ default is false, disabling PAE support.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>kernel_path</term>
+ <listitem>
+ <simpara>Valid for the Xen PVM and KVM hypervisors.</simpara>
+
+ <para>
+ This option specifies the path (on the node) to the
+ kernel to boot the instance with. Xen PVM instances
+ always require this, while for KVM if this option is
+ empty, it will cause the machine to load the kernel
+ from its disks.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>kernel_args</term>
+ <listitem>
+ <simpara>Valid for the Xen PVM and KVM hypervisors.</simpara>
+
+ <para>
+ This options specifies extra arguments to the kernel
+ that will be loaded. device. This is always used
+ for Xen PVM, while for KVM it is only used if the
+ <option>kernel_path</option> option is also
+ specified.
+ </para>
+
+ <para>
+ The default setting for this value is simply
+ <constant>"ro"</constant>, which mounts the root
+ disk (initially) in read-only one. For example,
+ setting this to <userinput>single</userinput> will
+ cause the instance to start in single-user mode.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>initrd_path</term>
+ <listitem>
+ <simpara>Valid for the Xen PVM and KVM hypervisors.</simpara>
+
+ <para>
+ This option specifies the path (on the node) to the
+ initrd to boot the instance with. Xen PVM instances
+ can use this always, while for KVM if this option is
+ only used if the <option>kernel_path</option> option
+ is also specified. You can pass here either an
+ absolute filename (the path to the initrd) if you
+ want to use an initrd, or use the format
+ <userinput>no_initrd_path</userinput> for no initrd.
+ </para>
</listitem>
</varlistentry>
+
<varlistentry>
- <term>local_raid1</term>
+ <term>root_path</term>
<listitem>
+ <simpara>Valid for the Xen PVM and KVM hypervisors.</simpara>
+
<para>
- Disk devices will be md raid1 arrays over two local
- logical volumes.
+ This options specifies the name of the root
+ device. This is always needed for Xen PVM, while for
+ KVM it is only used if the
+ <option>kernel_path</option> option is also
+ specified.
</para>
</listitem>
</varlistentry>
+
+ <varlistentry>
+ <term>serial_console</term>
+ <listitem>
+ <simpara>Valid for the KVM hypervisor.</simpara>
+
+ <simpara>This boolean option specifies whether to
+ emulate a serial console for the instance.</simpara>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </para>
+
+ <para>
+ </para>
+
+ <para>
+ The <option>--iallocator</option> option specifies the instance
+ allocator plugin to use. If you pass in this option the allocator
+ will select nodes for this instance automatically, so you don't need
+ to pass them with the <option>-n</option> option. For more
+ information please refer to the instance allocator documentation.
+ </para>
+
+ <para>
+ The <option>-t</option> options specifies the disk layout type for
+ the instance. The available choices are:
+ <variablelist>
<varlistentry>
- <term>remote_raid1</term>
+ <term>diskless</term>
<listitem>
<para>
- Disk devices will be md raid1 arrays with one
- component (so it's not actually raid1): a drbd
- (0.7.x) device between the instance's primary node
- and the node given by the second value of the
- <option>--node</option> option.
+ This creates an instance with no disks. Its useful for
+ testing only (or other special cases).
</para>
</listitem>
</varlistentry>
<varlistentry>
+ <term>file</term>
+ <listitem>
+ <para>Disk devices will be regular files.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>plain</term>
+ <listitem>
+ <para>Disk devices will be logical volumes.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
<term>drbd</term>
<listitem>
<para>
Disk devices will be drbd (version 8.x) on top of
- lvm volumes. They are equivalent in functionality to
- <replaceable>remote_raid1</replaceable>, but are
- recommended for new instances (if you have drbd 8.x
- installed).
+ lvm volumes.
</para>
</listitem>
</varlistentry>
<para>
The optional second value of the <option>--node</option> is used for
- the remote raid template type and specifies the remote node.
+ the drbd template type and specifies the remote node.
</para>
<para>
</para>
<para>
+ The <option>--file-storage-dir</option> specifies the relative path
+ under the cluster-wide file storage directory to store file-based
+ disks. It is useful for having different subdirectories for
+ different instances. The full path of the directory where the disk
+ files are stored will consist of cluster-wide file storage directory
+ + optional subdirectory + instance name. Example:
+ /srv/ganeti/file-storage/mysubdir/instance1.example.com. This option
+ is only relevant for instances using the file storage backend.
+ </para>
+
+ <para>
+ The <option>--file-driver</option> specifies the driver to use for
+ file-based disks. Note that currently these drivers work with the
+ xen hypervisor only. This option is only relevant for instances using
+ the file storage backend. The available choices are:
+ <variablelist>
+ <varlistentry>
+ <term>loop</term>
+ <listitem>
+ <para>
+ Kernel loopback driver. This driver uses loopback
+ devices to access the filesystem within the
+ file. However, running I/O intensive applications in
+ your instance using the loop driver might result in
+ slowdowns. Furthermore, if you use the loopback
+ driver consider increasing the maximum amount of
+ loopback devices (on most systems it's 8) using the
+ max_loop param.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>blktap</term>
+ <listitem>
+ <para>The blktap driver (for Xen hypervisors). In
+ order to be able to use the blktap driver you should
+ check if the 'blktapctrl' user space disk agent is
+ running (usually automatically started via xend). This
+ user-level disk I/O interface has the advantage of
+ better performance. Especially if you use a network
+ file system (e.g. NFS) to store your instances this is
+ the recommended choice.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </para>
+
+ <para>
+ The <option>--submit</option> option is used to send the job to
+ the master daemon but not wait for its completion. The job
+ ID will be shown so that it can be examined via
+ <command>gnt-job info</command>.
+ </para>
+
+ <para>
Example:
<screen>
-# gnt-instance add -t plain -s 30g -m 512 -o debian-etch \
+# gnt-instance add -t file --disk 0:size=30g -B memory=512 -o debian-etch \
+ -n node1.example.com --file-storage-dir=mysubdir instance1.example.com
+# gnt-instance add -t plain --disk 0:size=30g -B memory=512 -o debian-etch \
-n node1.example.com instance1.example.com
-# gnt-instance add -t remote_raid1 -s 30g -m 512 -o debian-etch \
+# gnt-instance add -t drbd --disk 0:size=30g -B memory=512 -o debian-etch \
-n node1.example.com:node2.example.com instance2.example.com
</screen>
</para>
</refsect3>
<refsect3>
+ <title>BATCH-CREATE</title>
+ <cmdsynopsis>
+ <command>batch-create</command>
+ <arg choice="req">instances_file.json</arg>
+ </cmdsynopsis>
+
+ <para>
+ This command (similar to the Ganeti 1.2
+ <command>batcher</command> tool) submits multiple instance
+ creation jobs based on a definition file. The instance
+ configurations do not encompass all the possible options for
+ the <command>add</command> command, but only a subset.
+ </para>
+
+ <para>
+ The instance file should be a valid-formed JSON file,
+ containing a dictionary with instance name and instance
+ parameters. The accepted parameters are:
+
+ <variablelist>
+ <varlistentry>
+ <term>disk_size</term>
+ <listitem>
+ <simpara>The size of the disks of the instance.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>disk_templace</term>
+ <listitem>
+ <simpara>The disk template to use for the instance,
+ the same as in the <command>add</command>
+ command.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>backend</term>
+ <listitem>
+ <simpara>A dictionary of backend parameters.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>hypervisor</term>
+ <listitem>
+ <simpara>A dictionary with a single key (the
+ hypervisor name), and as value the hypervisor
+ options. If not passed, the default hypervisor and
+ hypervisor options will be inherited.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>mac, ip, bridge</term>
+ <listitem>
+ <simpara>Specifications for the one NIC that will be
+ created for the instance.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>primary_node, secondary_node</term>
+ <listitem>
+ <simpara>The primary and optionally the secondary node
+ to use for the instance (in case an iallocator script
+ is not used).</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>iallocator</term>
+ <listitem>
+ <simpara>Instead of specifying the nodes, an
+ iallocator script can be used to automatically compute
+ them.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>start</term>
+ <listitem>
+ <simpara>whether to start the instance</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>ip_check</term>
+ <listitem>
+ <simpara>Skip the check for already-in-use instance;
+ see the description in the <command>add</command>
+ command for details.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>file_storage_dir, file_driver</term>
+ <listitem>
+ <simpara>Configuration for the <literal>file</literal>
+ disk type, see the <command>add</command> command for
+ details.</simpara>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </para>
+
+ <para>
+ A simple definition for one instance can be (with most of
+ the parameters taken from the cluster defaults):
+ <screen>
+{
+ "instance3": {
+ "template": "drbd",
+ "os": "debootstrap",
+ "disk_size": ["25G"],
+ "iallocator": "dumb"
+ },
+ "instance5": {
+ "template": "drbd",
+ "os": "debootstrap",
+ "disk_size": ["25G"],
+ "iallocator": "dumb",
+ "hypervisor": "xen-hvm",
+ "hvparams": {"acpi": true},
+ "backend": {"memory": 512}
+ }
+}
+</screen>
+ </para>
+
+ <para>
+ The command will display the job id for each submitted instance, as follows:
+ <screen>
+# gnt-instance batch-create instances.json
+instance3: 11224
+instance5: 11225
+</screen>
+ </para>
+
+ </refsect3>
+
+ <refsect3>
<title>REMOVE</title>
<cmdsynopsis>
<command>remove</command>
<arg>--ignore-failures</arg>
+ <arg>--submit</arg>
<arg choice="req"><replaceable>instance</replaceable></arg>
</cmdsynopsis>
</para>
<para>
+ The <option>--submit</option> option is used to send the job to
+ the master daemon but not wait for its completion. The job
+ ID will be shown so that it can be examined via
+ <command>gnt-job info</command>.
+ </para>
+
+ <para>
Example:
<screen>
# gnt-instance remove instance1.example.com
<command>list</command>
<arg>--no-headers</arg>
<arg>--separator=<replaceable>SEPARATOR</replaceable></arg>
- <arg>-o <replaceable>FIELD,...</replaceable></arg>
+ <arg>-o <replaceable>[+]FIELD,...</replaceable></arg>
+ <arg rep="repeat">instance</arg>
</cmdsynopsis>
<para>
Shows the currently configured instances with memory usage,
- disk usage, the node they are running on, and the CPU time,
- counted in seconds, used by each instance since its latest
- restart.
+ disk usage, the node they are running on, and their run
+ status.
</para>
<para>
are:
<variablelist>
<varlistentry>
- <term>name</term>
+ <term>name</term>
+ <listitem>
+ <simpara>the instance name</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>os</term>
+ <listitem>
+ <simpara>the OS of the instance</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>pnode</term>
+ <listitem>
+ <simpara>the primary node of the instance</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>snodes</term>
+ <listitem>
+ <simpara>comma-separated list of secondary nodes for the
+ instance; usually this will be just one node</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>admin_state</term>
+ <listitem>
+ <simpara>the desired state of the instance (either "yes"
+ or "no" denoting the instance should run or
+ not)</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>disk_template</term>
+ <listitem>
+ <simpara>the disk template of the instance</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>oper_state</term>
+ <listitem>
+ <simpara>the actual state of the instance; can be
+ one of the values "running", "stopped", "(node
+ down)"</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>status</term>
+ <listitem>
+ <simpara>combined form of admin_state and oper_stat;
+ this can be one of:
+ <computeroutput>ERROR_nodedown</computeroutput> if the
+ node of the instance is down,
+ <computeroutput>ERROR_down</computeroutput> if the
+ instance should run but is down,
+ <computeroutput>ERROR_up</computeroutput> if the
+ instance should be stopped but is actually running,
+ <computeroutput>ADMIN_down</computeroutput> if the
+ instance has been stopped (and is stopped) and
+ <computeroutput>running</computeroutput> if the
+ instance is set to be running (and is
+ running)</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>oper_ram</term>
+ <listitem>
+ <simpara>the actual memory usage of the instance as seen
+ by the hypervisor</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>ip</term>
+ <listitem>
+ <simpara>the ip address ganeti recognizes as associated with
+ the first instance interface</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>mac</term>
+ <listitem>
+ <simpara>the first instance interface MAC address</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>bridge</term>
<listitem>
- <simpara>the instance name</simpara>
+ <simpara>the bridge of the first instance NIC
+ </simpara>
</listitem>
</varlistentry>
<varlistentry>
- <term>os</term>
+ <term>sda_size</term>
<listitem>
- <simpara>the OS of the instance</simpara>
+ <simpara>the size of the instance's first disk</simpara>
</listitem>
</varlistentry>
<varlistentry>
- <term>pnode</term>
+ <term>sdb_size</term>
<listitem>
- <simpara>the primary node of the instance</simpara>
+ <simpara>the size of the instance's second disk, if
+ any</simpara>
</listitem>
</varlistentry>
<varlistentry>
- <term>snodes</term>
+ <term>vcpus</term>
<listitem>
- <simpara>comma-separated list of secondary nodes for the
- instance; usually this will be just one node</simpara>
+ <simpara>the number of VCPUs allocated to the
+ instance</simpara>
</listitem>
</varlistentry>
<varlistentry>
- <term>admin_state</term>
+ <term>tags</term>
<listitem>
- <simpara>the desired state of the instance (either "yes"
- or "no" denoting the instance should run or
- not)</simpara>
+ <simpara>comma-separated list of the instances's
+ tags</simpara>
</listitem>
</varlistentry>
<varlistentry>
- <term>admin_ram</term>
+ <term>serial_no</term>
<listitem>
- <simpara>the desired memory for the instance</simpara>
+ <simpara>the so called 'serial number' of the
+ instance; this is a numeric field that is incremented
+ each time the instance is modified, and it can be used
+ to track modifications</simpara>
</listitem>
</varlistentry>
<varlistentry>
- <term>disk_template</term>
+ <term>network_port</term>
<listitem>
- <simpara>the disk template of the instance</simpara>
+ <simpara>If the instance has a network port assigned
+ to it (e.g. for VNC connections), this will be shown,
+ otherwise <literal>-</literal> will be
+ displayed.</simpara>
</listitem>
</varlistentry>
<varlistentry>
- <term>oper_state</term>
+ <term>beparams</term>
<listitem>
- <simpara>the actual state of the instance; can take of
- the values "running", "stopped", "(node down)"</simpara>
+ <simpara>A text format of the entire beparams for the
+ instance. It's more useful to select individual fields
+ from this dictionary, see below.</simpara>
</listitem>
</varlistentry>
<varlistentry>
- <term>oper_ram</term>
+ <term>disk.count</term>
<listitem>
- <simpara>the actual memory usage of the instance as seen
- by the hypervisor</simpara>
+ <simpara>The number of instance disks.</simpara>
</listitem>
</varlistentry>
<varlistentry>
- <term>ip</term>
+ <term>disk.size/N</term>
<listitem>
- <simpara>the ip address ganeti recognizes as associated with
- the instance interface</simpara>
+ <simpara>The size of the instance's Nth disk. This is
+ a more generic form of the <literal>sda_size</literal>
+ and <literal>sdb_size</literal> fields.</simpara>
</listitem>
</varlistentry>
<varlistentry>
- <term>mac</term>
+ <term>disk.sizes</term>
<listitem>
- <simpara>the instance interface MAC address</simpara>
+ <simpara>A comma-separated list of the disk sizes for
+ this instance.</simpara>
</listitem>
</varlistentry>
<varlistentry>
- <term>bridge</term>
+ <term>disk_usage</term>
<listitem>
- <simpara>bridge the instance is connected to
- </simpara>
+ <simpara>The total disk space used by this instance on
+ each of its nodes. This is not the instance-visible
+ disk size, but the actual disk "cost" of the
+ instance.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>nic.mac/N</term>
+ <listitem>
+ <simpara>The MAC of the Nth instance NIC.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>nic.ip/N</term>
+ <listitem>
+ <simpara>The IP address of the Nth instance NIC.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>nic.bridge/N</term>
+ <listitem>
+ <simpara>The bridge the Nth instance NIC is attached
+ to.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>nic.macs</term>
+ <listitem>
+ <simpara>A comma-separated list of all the MACs of the
+ instance's NICs.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>nic.ips</term>
+ <listitem>
+ <simpara>A comma-separated list of all the IP
+ addresses of the instance's NICs.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>nic.bridges</term>
+ <listitem>
+ <simpara>A comma-separated list of all the bridges of the
+ instance's NICs.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>nic.count</term>
+ <listitem>
+ <simpara>The number of instance nics.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>hv/<replaceable>NAME</replaceable></term>
+ <listitem>
+ <simpara>The value of the hypervisor parameter called
+ <replaceable>NAME</replaceable>. For details of what
+ hypervisor parameters exist and their meaning, see the
+ <command>add</command> command.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>be/memory</term>
+ <listitem>
+ <simpara>The configured memory for the instance.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>be/vcpus</term>
+ <listitem>
+ <simpara>The configured number of VCPUs for the
+ instance.</simpara>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>be/auto_balance</term>
+ <listitem>
+ <simpara>Whether the instance is considered in N+1
+ checks.</simpara>
</listitem>
</varlistentry>
</variablelist>
</para>
<para>
+ If the value of the option starts with the character
+ <constant>+</constant>, the new field(s) will be added to the
+ default list. This allows to quickly see the default list
+ plus a few other fields, instead of retyping the entire list
+ of fields.
+ </para>
+
+ <para>
There is a subtle grouping about the available output
- fields: all fields except for <option>oper_state</option>
- and <option>oper_ram</option> are configuration value and
- not run-time values. So if you don't select any of the
- <option>oper_*</option> fields, the query will be satisfied
+ fields: all fields except for <option>oper_state</option>,
+ <option>oper_ram</option> and <option>status</option> are
+ configuration value and not run-time values. So if you don't
+ select any of the these fields, the query will be satisfied
instantly from the cluster configuration, without having to
ask the remote nodes for the data. This can be helpful for
big clusters when you only want some data and it makes sense
<cmdsynopsis>
<command>info</command>
- <arg rep="repeat"><replaceable>instance</replaceable></arg>
+ <group>
+ <arg>-s</arg>
+ <arg>--static</arg>
+ </group>
+ <group choice="req">
+ <arg>--all</arg>
+ <arg rep="repeat"><replaceable>instance</replaceable></arg>
+ </group>
</cmdsynopsis>
<para>
- Show detailed information about the (given) instances. This
- is different from <command>list</command> as it shows
- detailed data about the instance's disks (especially useful
- for remote raid templates).
+ Show detailed information about the given instance(s). This is
+ different from <command>list</command> as it shows detailed data
+ about the instance's disks (especially useful for the drbd disk
+ template).
+ </para>
+
+ <para>
+ If the option <option>-s</option> is used, only information
+ available in the configuration file is returned, without
+ querying nodes, making the operation faster.
+ </para>
+
+ <para>
+ Use the <option>--all</option> to get info about all instances,
+ rather than explicitely passing the ones you're interested in.
</para>
</refsect3>
<cmdsynopsis>
<command>modify</command>
- <arg choice="opt">-m <replaceable>memsize</replaceable></arg>
- <arg choice="opt">-p <replaceable>vcpus</replaceable></arg>
- <arg choice="opt">-i <replaceable>ip</replaceable></arg>
- <arg choice="opt">-b <replaceable>bridge</replaceable></arg>
+ <sbr>
+ <arg choice="opt">-H <replaceable>HYPERVISOR_PARAMETERS</replaceable></arg>
+ <sbr>
+ <arg choice="opt">-B <replaceable>BACKEND_PARAMETERS</replaceable></arg>
+ <sbr>
+ <group>
+ <arg>--net add<replaceable><optional>:options</optional></replaceable></arg>
+ <arg>--net remove</arg>
+ <arg>--net <replaceable>N:options</replaceable></arg>
+ </group>
+ <sbr>
+ <group>
+ <arg>--disk add:size=<replaceable>SIZE</replaceable></arg>
+ <arg>--disk remove</arg>
+ <arg>--disk <replaceable>N</replaceable>:mode=<replaceable>MODE</replaceable></arg>
+ </group>
+
+ <sbr>
+ <arg>--submit</arg>
+ <sbr>
<arg choice="req"><replaceable>instance</replaceable></arg>
</cmdsynopsis>
<para>
- Modify the memory size, number of vcpus, ip address and/or bridge
- for an instance.
+ Modifies the memory size, number of vcpus, ip address, MAC
+ address and/or bridge for an instance. It can also add and
+ remove disks and NICs to/from the instance. Note that you
+ need to give at least one of the arguments, otherwise the
+ command complains.
+ </para>
+
+ <para>
+ The <option>-H</option> option specifies hypervisor options
+ in the form of <userinput>name=value[,...]</userinput>. For details which options can be specified, see the <command>add</command> command.
+ </para>
+
+ <para>
+ The <option>--disk
+ add:size=<replaceable>SIZE</replaceable></option> option
+ adds a disk to the instance. The <option>--disk
+ remove</option> will remove the last disk of the
+ instance. The <option>--disk
+ <replaceable>N</replaceable>:mode=<replaceable>MODE</replaceable></option>
+ option will change the mode of the Nth disk of the instance
+ between read-only (<literal>ro</literal>) and read-write
+ (<literal>rw</literal>).
</para>
<para>
- The memory size is given in MiB. Note that you need to give
- at least one of the arguments, otherwise the command
- complains.
+ The <option>--nic
+ add:<replaceable>options</replaceable></option> option will
+ add a new NIC to the instance. The available options are the
+ same as in the <command>add</command> command (mac, ip,
+ bridge). The <option>--nice remove</option> will remove the
+ last NIC of the instance, while the <option>--nic
+ <replaceable>N</replaceable>:<replaceable>options</replaceable></option>
+ option will change the parameters of the Nth instance NIC.
+ </para>
+
+ <para>
+ The <option>--submit</option> option is used to send the job to
+ the master daemon but not wait for its completion. The job
+ ID will be shown so that it can be examined via
+ <command>gnt-job info</command>.
</para>
<para>
<cmdsynopsis>
<command>reinstall</command>
<arg choice="opt">-o <replaceable>os-type</replaceable></arg>
+ <arg>--select-os</arg>
<arg choice="opt">-f <replaceable>force</replaceable></arg>
- <arg choice="req"><replaceable>instance</replaceable></arg>
+ <arg>--force-multiple</arg>
+ <sbr>
+ <group choice="opt">
+ <arg>--instance</arg>
+ <arg>--node</arg>
+ <arg>--primary</arg>
+ <arg>--secondary</arg>
+ <arg>--all</arg>
+ </group>
+ <arg>--submit</arg>
+ <arg choice="opt" rep="repeat"><replaceable>instance</replaceable></arg>
</cmdsynopsis>
<para>
- Reinstalls the operating system on the given instance. The instance
- must be stopped when running this command. If the
- <option>--os-type</option> is specified, the operating system is
- changed.
+ Reinstalls the operating system on the given instance(s). The
+ instance(s) must be stopped when running this command. If the
+ <option>--os-type</option> is specified, the operating
+ system is changed.
+ </para>
+
+ <para>
+ The <option>--select-os</option> option switches to an
+ interactive OS reinstall. The user is prompted to select the OS
+ template from the list of available OS templates.
+ </para>
+
+ <para>
+ Since this is a potentially dangerous command, the user will
+ be required to confirm this action, unless the
+ <option>-f</option> flag is passed. When multiple instances
+ are selected (either by passing multiple arguments or by
+ using the <option>--node</option>,
+ <option>--primary</option>, <option>--secondary</option> or
+ <option>--all</option> options), the user must pass both the
+ <option>--force</option> and
+ <option>--force-multiple</option> options to skip the
+ interactive confirmation.
+ </para>
+
+ <para>
+ The <option>--submit</option> option is used to send the job to
+ the master daemon but not wait for its completion. The job
+ ID will be shown so that it can be examined via
+ <command>gnt-job info</command>.
</para>
+
+
</refsect3>
<refsect3>
<cmdsynopsis>
<command>rename</command>
<arg>--no-ip-check</arg>
+ <arg>--submit</arg>
<arg choice="req"><replaceable>instance</replaceable></arg>
<arg choice="req"><replaceable>new_name</replaceable></arg>
</cmdsynopsis>
instance is started). The IP test can be skipped if the
<option>--no-ip-check</option> option is passed.
</para>
+
+ <para>
+ The <option>--submit</option> option is used to send the job to
+ the master daemon but not wait for its completion. The job
+ ID will be shown so that it can be examined via
+ <command>gnt-job info</command>.
+ </para>
+
</refsect3>
</refsect2>
<cmdsynopsis>
<command>startup</command>
- <arg>--extra=<replaceable>PARAMS</replaceable></arg>
+ <sbr>
<arg>--force</arg>
<sbr>
+ <arg>--force-multiple</arg>
+ <sbr>
<group choice="opt">
<arg>--instance</arg>
<arg>--node</arg>
<arg>--all</arg>
</group>
<sbr>
+ <arg>-H <option>key=value...</option></arg>
+ <arg>-B <option>key=value...</option></arg>
+ <sbr>
+ <arg>--submit</arg>
+ <sbr>
<arg choice="opt"
rep="repeat"><replaceable>name</replaceable></arg>
</cmdsynopsis>
</para>
<para>
- The <option>--extra</option> option is used to pass
- additional argument to the instance's kernel for this start
- only. Currently there is no way to specify a persistent set
- of arguments (beside the one hardcoded). Note that this may
- not apply to all virtualization types.
+ Use <option>--force</option> to start even if secondary disks are
+ failing.
</para>
<para>
- Use <option>--force</option> to start even if secondary disks are
- failing.
+ The <option>--force-multiple</option> will skip the
+ interactive confirmation in the case the more than one
+ instance will be affected.
+ </para>
+
+ <para>
+ The <option>-H</option> and <option>-B</option> options
+ specify extra, temporary hypervisor and backend parameters
+ that can be used to start an instance with modified
+ parameters. They can be useful for quick testing without
+ having to modify an instance back and forth, e.g.:
+ <screen>
+# gnt-instance start -H root_args="single" instance1
+# gnt-instance start -B memory=2048 instance2
+ </screen>
+ The first form will start the instance
+ <userinput>instance1</userinput> in single-user mode, and
+ the instance <userinput>instance2</userinput> with 2GB of
+ RAM (this time only, unless that is the actual instance
+ memory size already).
+ </para>
+
+ <para>
+ The <option>--submit</option> option is used to send the job to
+ the master daemon but not wait for its completion. The job
+ ID will be shown so that it can be examined via
+ <command>gnt-job info</command>.
</para>
<para>
Example:
<screen>
# gnt-instance start instance1.example.com
-# gnt-instance start --extra single test1.example.com
# gnt-instance start --node node1.example.com node2.example.com
# gnt-instance start --all
</screen>
<cmdsynopsis>
<command>shutdown</command>
<sbr>
+ <arg>--force-multiple</arg>
+ <sbr>
<group choice="opt">
<arg>--instance</arg>
<arg>--node</arg>
<arg>--all</arg>
</group>
<sbr>
-
+ <arg>--submit</arg>
+ <sbr>
<arg choice="opt"
rep="repeat"><replaceable>name</replaceable></arg>
</cmdsynopsis>
</para>
<para>
+ The <option>--submit</option> option is used to send the job to
+ the master daemon but not wait for its completion. The job
+ ID will be shown so that it can be examined via
+ <command>gnt-job info</command>.
+ </para>
+
+
+ <para>
Example:
<screen>
# gnt-instance shutdown instance1.example.com
<cmdsynopsis>
<command>reboot</command>
<sbr>
- <arg>--extra=<replaceable>PARAMS</replaceable></arg>
- <sbr>
<arg>--type=<replaceable>REBOOT-TYPE</replaceable></arg>
<sbr>
<arg>--ignore-secondaries</arg>
<arg>--all</arg>
</group>
<sbr>
-
+ <arg>--submit</arg>
+ <sbr>
<arg choice="opt"
rep="repeat"><replaceable>name</replaceable></arg>
</cmdsynopsis>
recreates the hypervisor config for the instance and
starts the instance. A full reboot does the equivalent
of <command>gnt-instance shutdown && gnt-instance
- startup</command>. The default is soft reboot.
+ startup</command>. The default is hard reboot.
</para>
<para>
</para>
<para>
- Use the <option>--force-multiple</option> option to keep
- gnt-instance from asking for confirmation when more than one
- instance is affected.
+ The <option>--force-multiple</option> will skip the
+ interactive confirmation in the case the more than one
+ instance will be affected.
</para>
<para>
<title>CONSOLE</title>
<cmdsynopsis>
<command>console</command>
+ <arg choice="opt">--show-cmd</arg>
<arg choice="req"><replaceable>instance</replaceable></arg>
</cmdsynopsis>
<para>
- Connects to the console of the given instance. If the instance
- is not up, an error is returned.
+ Connects to the console of the given instance. If the
+ instance is not up, an error is returned. Use the
+ <option>--show-cmd</option> option to display the command
+ instead of executing it.
+ </para>
+
+ <para>
+ For HVM instances, this will attempt to connect to the
+ serial console of the instance. To connect to the
+ virtualized "physical" console of a HVM instance, use a VNC
+ client with the connection info from the
+ <command>info</command> command.
</para>
<para>
<cmdsynopsis>
<command>replace-disks</command>
- <arg choice="opt">--new-secondary <replaceable>NODE</replaceable></arg>
+ <arg>--submit</arg>
+ <arg choice="req">-p</arg>
+ <arg>--disks <replaceable>idx</replaceable></arg>
<arg choice="req"><replaceable>instance</replaceable></arg>
</cmdsynopsis>
<cmdsynopsis>
<command>replace-disks</command>
+ <arg>--submit</arg>
<arg choice="req">-s</arg>
- <arg choice="req">--new-secondary <replaceable>NODE</replaceable></arg>
+ <arg>--disks <replaceable>idx</replaceable></arg>
<arg choice="req"><replaceable>instance</replaceable></arg>
</cmdsynopsis>
<cmdsynopsis>
<command>replace-disks</command>
- <group>
- <arg choice="req">-s</arg>
- <arg choice="req">-p</arg>
+ <arg>--submit</arg>
+ <group choice="req">
+ <arg>--iallocator <replaceable>name</replaceable></arg>
+ <arg>--new-secondary <replaceable>NODE</replaceable></arg>
</group>
+
<arg choice="req"><replaceable>instance</replaceable></arg>
</cmdsynopsis>
<para>
- This command is a generalized form for adding and replacing
- disks.
+ This command is a generalized form for replacing disks. It
+ is currently only valid for the mirrored (DRBD) disk
+ template.
</para>
<para>
- The first form is usable with the
- <literal>remote_raid1</literal> disk template. This will
- replace the disks on both the primary and secondary node,
- and optionally will change the secondary node to a new one
- if you pass the <option>--new-secondary</option> option.
+ The first form (when passing the <option>-p</option> option)
+ will replace the disks on the primary, while the second form
+ (when passing the <option>-s</option> option will replace
+ the disks on the secondary node. For these two cases (as the
+ node doesn't change), it is possible to only run the replace
+ for a subset of the disks, using the option
+ <option>--disks</option> which takes a list of
+ comma-delimited disk indices (zero-based),
+ e.g. <userinput>0,2</userinput> to replace only the first
+ and third disks.
</para>
<para>
- The second and third forms are usable with the
- <literal>drbd</literal> disk template. The second form will
- do a secondary replacement, but as opposed to the
- <literal>remote_raid1</literal> will not replace the disks
- on the primary, therefore it will execute faster. The third
- form will replace the disks on either the primary
- (<option>-p</option>) or the secondary (<option>-s</option>)
- node of the instance only, without changing the node.
+ The third form (when passing either the
+ <option>--iallocator</option> or the
+ <option>--new-secondary</option> option) is designed to
+ change secondary node of the instance. Specifying
+ <option>--iallocator</option> makes the new secondary be
+ selected automatically by the specified allocator plugin,
+ otherwise the new secondary node will be the one chosen
+ manually via the <option>--new-secondary</option> option.
</para>
- </refsect3>
-
- <refsect3>
- <title>ADD-MIRROR</title>
- <cmdsynopsis>
- <command>add-mirror</command>
- <arg choice="req">-b <replaceable>sdX</replaceable></arg>
- <arg choice="req">-n <replaceable>node</replaceable></arg>
- <arg choice="req"><replaceable>instance</replaceable></arg>
- </cmdsynopsis>
<para>
- Adds a new mirror to the disk layout of the instance, if the
- instance has a remote raid disk layout.
-
- The new mirror member will be between the instance's primary
- node and the node given with the <option>-n</option> option.
+ The <option>--submit</option> option is used to send the job to
+ the master daemon but not wait for its completion. The job
+ ID will be shown so that it can be examined via
+ <command>gnt-job info</command>.
</para>
- </refsect3>
-
- <refsect3>
- <title>REMOVE-MIRROR</title>
- <cmdsynopsis>
- <command>removemirror</command>
- <arg choice="req">-b <replaceable>sdX</replaceable></arg>
- <arg choice="req">-p <replaceable>id</replaceable></arg>
- <arg choice="req"><replaceable>instance</replaceable></arg>
- </cmdsynopsis>
<para>
- Removes a mirror componenent from the disk layout of the
- instance, if the instance has a remote raid disk layout.
+ Note that it is not possible to select an offline or drained
+ node as a new secondary.
</para>
- <para>
- You need to specifiy on which disk to act on using the
- <option>-b</option> option (either <filename>sda</filename>
- or <filename>sdb</filename>) and the mirror component, which
- is identified by the <option>-p</option> option. You can
- find the list of valid identifiers with the
- <command>info</command> command.
- </para>
+ </refsect3>
<refsect3>
<title>ACTIVATE-DISKS</title>
<cmdsynopsis>
<command>activate-disks</command>
+ <arg>--submit</arg>
<arg choice="req"><replaceable>instance</replaceable></arg>
</cmdsynopsis>
<para>
successful, the command will show the location and name of
the block devices:
<screen>
-node1.example.com:sda:/dev/md0
-node1.example.com:sdb:/dev/md1
+node1.example.com:disk/0:/dev/drbd0
+node1.example.com:disk/1:/dev/drbd1
</screen>
In this example, <emphasis>node1.example.com</emphasis> is
the name of the node on which the devices have been
- activated. The <emphasis>sda</emphasis> and
- <emphasis>sdb</emphasis> are the names of the block devices
- inside the instance. <emphasis>/dev/md0</emphasis> and
- <emphasis>/dev/md1</emphasis> are the names of the block
- devices as visible on the node.
+ activated. The <emphasis>disk/0</emphasis> and
+ <emphasis>disk/1</emphasis> are the Ganeti-names of the
+ instance disks; how they are visible inside the instance is
+ hypervisor-specific. <emphasis>/dev/drbd0</emphasis> and
+ <emphasis>/dev/drbd1</emphasis> are the actual block devices
+ as visible on the node.
+ </para>
+
+ <para>
+ The <option>--submit</option> option is used to send the job to
+ the master daemon but not wait for its completion. The job
+ ID will be shown so that it can be examined via
+ <command>gnt-job info</command>.
</para>
<para>
<cmdsynopsis>
<command>deactivate-disks</command>
+ <arg>--submit</arg>
<arg choice="req"><replaceable>instance</replaceable></arg>
</cmdsynopsis>
<para>
De-activates the block devices of the given instance. Note
- that if you run this command for a remote raid instance
- type, while it is running, it will not be able to shutdown
- the block devices on the primary node, but it will shutdown
- the block devices on the secondary nodes, thus breaking the
- replication.
+ that if you run this command for an instance with a drbd
+ disk template, while it is running, it will not be able to
+ shutdown the block devices on the primary node, but it will
+ shutdown the block devices on the secondary nodes, thus
+ breaking the replication.
+ </para>
+
+ <para>
+ The <option>--submit</option> option is used to send the job to
+ the master daemon but not wait for its completion. The job
+ ID will be shown so that it can be examined via
+ <command>gnt-job info</command>.
+ </para>
+
+ </refsect3>
+
+ <refsect3>
+ <title>GROW-DISK</title>
+ <cmdsynopsis>
+ <command>grow-disk</command>
+ <arg>--no-wait-for-sync</arg>
+ <arg>--submit</arg>
+ <arg choice="req"><replaceable>instance</replaceable></arg>
+ <arg choice="req"><replaceable>disk</replaceable></arg>
+ <arg choice="req"><replaceable>amount</replaceable></arg>
+ </cmdsynopsis>
+
+ <para>
+ Grows an instance's disk. This is only possible for
+ instances having a <literal>plain</literal> or
+ <literal>drbd</literal> disk template.
+ </para>
+
+ <para>
+ Note that this command only change the block device size; it
+ will not grow the actual filesystems, partitions, etc. that
+ live on that disk. Usually, you will need to:
+ <orderedlist>
+ <listitem>
+ <simpara>use <command>gnt-instance grow-disk</command></simpara>
+ </listitem>
+ <listitem>
+ <simpara>reboot the instance (later, at a convenient
+ time)</simpara>
+ </listitem>
+ <listitem>
+ <simpara>use a filesystem resizer, such as
+ <citerefentry> <refentrytitle>ext2online</refentrytitle>
+ <manvolnum>8</manvolnum> </citerefentry> or
+ <citerefentry> <refentrytitle>xfs_growfs</refentrytitle>
+ <manvolnum>8</manvolnum> </citerefentry> to resize the
+ filesystem, or use <citerefentry>
+ <refentrytitle>fdisk</refentrytitle>
+ <manvolnum>8</manvolnum> </citerefentry> to change the
+ partition table on the disk
+ </simpara>
+ </listitem>
+ </orderedlist>
+ </para>
+
+
+ <para>
+ The <replaceable>disk</replaceable> argument is the index of
+ the instance disk to grow. The
+ <replaceable>amount</replaceable> argument is given either
+ as a number (and it represents the amount to increase the
+ disk with in mebibytes) or can be given similar to the
+ arguments in the create instance operation, with a suffix
+ denoting the unit.
+ </para>
+
+ <para>
+ Note that the disk grow operation might complete on one node
+ but fail on the other; this will leave the instance with
+ different-sized LVs on the two nodes, but this will not
+ create problems (except for unused space).
</para>
+ <para>
+ If you do not want gnt-instance to wait for the new disk
+ region to be synced, use the
+ <option>--no-wait-for-sync</option> option.
+ </para>
+
+ <para>
+ The <option>--submit</option> option is used to send the job to
+ the master daemon but not wait for its completion. The job
+ ID will be shown so that it can be examined via
+ <command>gnt-job info</command>.
+ </para>
+
+
+ <para>Example (increase the first disk for instance1 by 16GiB):
+ <screen>
+# gnt-instance grow-disk instance1.example.com 0 16g
+ </screen>
+ </para>
+
+ <para>
+ Also note that disk shrinking is not supported; use
+ <command>gnt-backup export</command> and then
+ <command>gnt-backup import</command> to reduce the disk size
+ of an instance.
+ </para>
</refsect3>
</refsect2>
<command>failover</command>
<arg>-f</arg>
<arg>--ignore-consistency</arg>
+ <arg>--submit</arg>
<arg choice="req"><replaceable>instance</replaceable></arg>
</cmdsynopsis>
<para>
Failover will fail the instance over its secondary
- node. This works only for instances having a remote raid
- disk layout.
+ node. This works only for instances having a drbd disk
+ template.
</para>
<para>
</para>
<para>
+ The <option>--submit</option> option is used to send the job to
+ the master daemon but not wait for its completion. The job
+ ID will be shown so that it can be examined via
+ <command>gnt-job info</command>.
+ </para>
+
+ <para>
Example:
<screen>
# gnt-instance failover instance1.example.com
</para>
</refsect3>
+ <refsect3>
+ <title>MIGRATE</title>
+
+ <cmdsynopsis>
+ <command>migrate</command>
+ <arg>-f</arg>
+ <arg choice="req">--cleanup</arg>
+ <arg choice="req"><replaceable>instance</replaceable></arg>
+ </cmdsynopsis>
+
+ <cmdsynopsis>
+ <command>migrate</command>
+ <arg>-f</arg>
+ <arg>--non-live</arg>
+ <arg choice="req"><replaceable>instance</replaceable></arg>
+ </cmdsynopsis>
+
+ <para>
+ Migrate will move the instance to its secondary node without
+ shutdown. It only works for instances having the drbd8 disk
+ template type.
+ </para>
+
+ <para>
+ The migration command needs a perfectly healthy instance, as
+ we rely on the dual-master capability of drbd8 and the disks
+ of the instance are not allowed to be degraded.
+ </para>
+
+ <para>
+ The <option>--non-live</option> option will switch (for the
+ hypervisors that support it) between a "fully live"
+ (i.e. the interruption is as minimal as possible) migration
+ and one in which the instance is frozen, its state saved and
+ transported to the remote node, and then resumed there. This
+ all depends on the hypervisor support for two different
+ methods. In any case, it is not an error to pass this
+ parameter (it will just be ignored if the hypervisor doesn't
+ support it).
+ </para>
+
+ <para>
+ If the <option>--cleanup</option> option is passed, the
+ operation changes from migration to attempting recovery from
+ a failed previous migration. In this mode, ganeti checks if
+ the instance runs on the correct node (and updates its
+ configuration if not) and ensures the instances's disks are
+ configured correctly. In this mode, the
+ <option>--non-live</option> option is ignored.
+ </para>
+
+ <para>
+ The option <option>-f</option> will skip the prompting for
+ confirmation.
+ </para>
+ <para>
+ Example (and expected output):
+ <screen>
+# gnt-instance migrate instance1
+Migrate will happen to the instance instance1. Note that migration is
+**experimental** in this version. This might impact the instance if
+anything goes wrong. Continue?
+y/[n]/?: y
+* checking disk consistency between source and target
+* ensuring the target is in secondary mode
+* changing disks into dual-master mode
+ - INFO: Waiting for instance instance1 to sync disks.
+ - INFO: Instance instance1's disks are in sync.
+* migrating instance to node2.example.com
+* changing the instance's disks on source node to secondary
+ - INFO: Waiting for instance instance1 to sync disks.
+ - INFO: Instance instance1's disks are in sync.
+* changing the instance's disks to single-master
+#
+ </screen>
+ </para>
+ </refsect3>
+
</refsect2>
<refsect2>
projects / ganeti-local / blobdiff