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| − | ''Main article: [[:Category:CLI|CLI]]''
| + | This is a collection of articles describing specific CRIU command line options. |
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| − | == Synopsis ==
| + | {{Special:PrefixIndex/CLI/}} |
| − | <pre>
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| − | criu <command> -t <pid> [<options>]
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| − | </pre>
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| − | | |
| − | == Description ==
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| − | criu is command line utility to steer checkpoint and restore procedure.
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| − | | |
| − | == Options ==
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| − | <pre>
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| − | <command>::
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| − | One of the following commands
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| − | * 'dump'
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| − | to initiate checkpoint procedure
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| − | * 'restore'
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| − | to restore previously checkpointed processes
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| − | * 'show'
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| − | to decode binary dump files and show their contents in human
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| − | readable format
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| − | * 'check'
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| − | to test whether the kernel support is up-to-date
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| − | * 'exec'
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| − | to execute a system call from another task's context
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| − | * 'page-server'
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| − | to launch a page-server
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| − | * 'service'
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| − | to start RPC service
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| − | | |
| − | -c::
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| − | In case of 'show' command the dumped pages content will be shown in hex format.
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| − | -D <path>::
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| − | Use path 'path' as a base directory where to look for dump files set. This
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| − | commands allpies to any <command>.
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| − | -s::
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| − | Leave tasks in stopped state after checkpoint instead of killing them.
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| − | -f <file>::
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| − | This option is valid for 'show' command only and allows to see content of
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| − | the <file> specified.
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| − | -t <pid>::
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| − | Checkpoint the whole process tree starting from 'pid'.
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| − | -d::
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| − | Detach criu itself once restore is complete.
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| − | -n <ns>::
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| − | Checkpoint namespaces. Namespaces must be separated by comma.
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| − | We now support all namespaces -- uts, ipc, net and mnt
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| − | -o <file>::
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| − | Write logging messages to 'file'.
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| − | -v <num>::
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| − | Set logging level to 'num'. Valid options are: 0 - (silent, error messages
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| − | only), 1 - informative (default), 2 - debug messages.
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| − | </pre>
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| − | | |
| − | == Examples ==
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| − | First thing to do is to [[Checking the kernel|check]] the kernel support being up-to-date with the
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| − | <pre>
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| − | # criu check
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| − | </pre>
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| − | | |
| − | command. If it says "Looks good", then you can proceed, otherwise dump/restore may not work.
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| − | | |
| − | To checkpoint a program with pid 1234 and write all image files into directory checkpoint one should type
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| − | | |
| − | <pre>
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| − | # criu dump -D checkpoint -t 1234
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| − | </pre>
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| − | | |
| − | To restore this program detaching criu itself, one should type
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| − | <pre>
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| − | criu restore -d -D checkpoint
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| − | </pre>
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| − | "Detaching" (the <code>-d</code> option) here means, that criu will exit after restoring the processes
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| − | and the latter will get re-parent-ed to the init task.
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| − | To close a file descriptor number 1 in task with pid 1234 run
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| − | | |
| − | <pre>
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| − | criu exec -t 1234 close 1
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| − | </pre>
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| − | To open a file named /foo/bar for read-write in the task with pid 1234 run
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| − | | |
| − | <pre>
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| − | criu exec -t 1234 open '&/foo/bar' 2
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| − | </pre>
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| − | | |
| − | == Security ==
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| − | | |
| − | See [[Security]]
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| | == See also == | | == See also == |
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| | * [[:Category:HOWTO]] | | * [[:Category:HOWTO]] |
| | * [[:Category:Live migration]] | | * [[:Category:Live migration]] |
| − | * [[Incremental dumps]]
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| | * [[Statistics]] | | * [[Statistics]] |
| − | * [[RPC]] API to C/R functionality | + | * [[RPC]] -- an API to C/R functionality |
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| | [[Category: API]] | | [[Category: API]] |