lxc-checkpoint(1) - Linux man page

Name

lxc-checkpoint - checkpoint a running container (not implemented yet)

Synopsis

lxc-checkpoint --statefile=FILE --statefd=FD --name=NAME [ -k|-p ]

Description

lxc-checkpoint is a command to checkpoint the specified container NAME and dumps its state into the file FILE. If the option --kill is specified, the application running in the container will terminate after the checkpoint just before resuming its execution. If the option --pause is specified, the application will be stopped after the checkpoint just before resuming execution. The command lxc-unfreeze will resume its execution.

Checkpoint Options

-S, --statefile=FILE

write the state of the container in this FILE. This option is exclusive with --statefd below.
-d, --statefd=FD
write the state of the container in this FD file descriptor. This option is exclusive with above --statefile.
-k,--kill
Kill container processes after checkpoint. the processes are sent a SIGKILL signal.

This option is mutually exclusive with the following --pause option.

-p,--pause
Pause container processes after checkpoint. The container will be stopped until you resume it. This option is mutually exclusive with previously mentionned --kill option.

Common Options

These options are common to most of lxc commands.

-?, -h, --help
Print a longer usage message than normal.
--usage
Give the usage message
-q, --quiet
mute on
-o, --logfile=FILE
Output to an alternate log FILE. The default is no log.
-l, --logpriority=LEVEL
Set log priority to LEVEL. The default log priority is ERROR. Possible values are : FATAL, CRIT, WARN, ERROR, NOTICE, INFO, DEBUG.

Note that this option is setting the priority of the events log in the alternate log file. It do not have effect on the ERROR events log on stderr.

-n, --name=NAME
Use container identifier NAME. The container identifier format is an alphanumeric string.

Examples

To start a new container 123 computing decimals of pi 

lxc-execute -n 123 -- pi1 -d 500000
lxc-execute --name=123 -- pi1 -d 500000
to checkpoint the same container in dump-death mode 
lxc-checkpoint -n 123 -S /share/123/chkpt1 -k
lxc-checkpoint --name=123 -S /share/123/chkpt1 -k
to checkpoint the same container and pause it 
lxc-checkpoint -n 123 -S /share/123/chkpt1 -p
lxc-checkpoint --name=123 -S /share/123/chkpt1 -p

Notes

Actually, this command does not operate. Its description helps to define a CLI api for future Checkpoint / Restart solution

See Also

lxc(1), lxc-create(1), lxc-destroy(1), lxc-start(1), lxc-stop(1), lxc-execute(1), lxc-kill(1), lxc-console(1), lxc-monitor(1), lxc-wait(1), lxc-cgroup(1), lxc-ls(1), lxc-ps(1), lxc-info(1), lxc-freeze(1), lxc-unfreeze(1), lxc-attach(1), lxc.conf(5)

Author

Daniel Lezcano <daniel.lezcano@free.fr>