<cmdsynopsis>
<command>add</command>
<sbr>
- <arg rep="repeat">--disk=<replaceable>N</replaceable>:size=<replaceable>VAL</replaceable><arg>,mode=<replaceable>ro|rw</replaceable></arg></arg>
+ <arg choice="req">-t<group choice="req">
+ <arg>diskless</arg>
+ <arg>file</arg>
+ <arg>plain</arg>
+ <arg>drbd</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>
</group></arg>
<sbr>
- <arg choice="req">-t<group choice="req">
- <arg>diskless</arg>
- <arg>file</arg>
- <arg>plain</arg>
- <arg>drbd</arg>
- </group></arg>
- <sbr>
-
<group choice="req">
<arg>-n <replaceable>node<optional>:secondary-node</optional></replaceable></arg>
<arg>--iallocator <replaceable>name</replaceable></arg>
</para>
<para>
+ 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>, and a three-disk
- instance can be specified as <userinput>--disk 0:size=20G
- --disk 1:size=4G --disk 2:size=100G</userinput>.
+ <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>
</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>
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.
+ 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>
<arg>-s</arg>
<arg>--static</arg>
</group>
- <arg rep="repeat"><replaceable>instance</replaceable></arg>
+ <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 drbd disk template).
+ 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>
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>
<refsect3>
<cmdsynopsis>
<command>reinstall</command>
<arg choice="opt">-o <replaceable>os-type</replaceable></arg>
- <arg choice="opt">-f <replaceable>force</replaceable></arg>
<arg>--select-os</arg>
+ <arg choice="opt">-f <replaceable>force</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="req"><replaceable>instance</replaceable></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>
</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
<cmdsynopsis>
<command>startup</command>
<sbr>
- <arg>--extra=<replaceable>PARAMS</replaceable></arg>
<arg>--force</arg>
<sbr>
<arg>--force-multiple</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"
</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.
- </para>
-
- <para>
Use <option>--force</option> to start even if secondary disks are
failing.
</para>
</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
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>reboot</command>
<sbr>
- <arg>--extra=<replaceable>PARAMS</replaceable></arg>
- <sbr>
<arg>--type=<replaceable>REBOOT-TYPE</replaceable></arg>
<sbr>
<arg>--ignore-secondaries</arg>
<command>replace-disks</command>
<arg>--submit</arg>
<arg choice="req">-p</arg>
+ <arg>--disks <replaceable>idx</replaceable></arg>
<arg choice="req"><replaceable>instance</replaceable></arg>
</cmdsynopsis>
<command>replace-disks</command>
<arg>--submit</arg>
<arg choice="req">-s</arg>
+ <arg>--disks <replaceable>idx</replaceable></arg>
<arg choice="req"><replaceable>instance</replaceable></arg>
</cmdsynopsis>
</cmdsynopsis>
<para>
- This command is a generalized form for adding and replacing
- disks. It is currently only valid for the mirrored (DRBD)
- disk template.
+ 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 (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.
+ 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>
projects / ganeti-local / blobdiff