Difference between revisions of "Action scripts"
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| − | The criu can call your hooks on various stages of dumping/restoring. | + | The criu can call your hooks on various stages of dumping/restoring. Cooks can be one of |
;network-lock | ;network-lock | ||
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;setup-namespaces | ;setup-namespaces | ||
: called when the root task is alive and new set of namespaces is created to set them up | : called when the root task is alive and new set of namespaces is created to set them up | ||
| + | |||
| + | |||
| + | == CLI == | ||
| + | These hooks are added with the --action-script shell-code-to-execute option. When called, the CRTOOLS_SCRIPT_ACTION environment is set to a value determining which type of action is performed. | ||
== RPC == | == RPC == | ||
In case or RPC, action scripts are implemented as notifications -- once CRIU service wants to execute a script it send an RPC message to caller and waits for it to respond with <code>criu_req</code> message having <code>notify_success = true</code>. | In case or RPC, action scripts are implemented as notifications -- once CRIU service wants to execute a script it send an RPC message to caller and waits for it to respond with <code>criu_req</code> message having <code>notify_success = true</code>. | ||
| + | |||
| + | == Library == | ||
| + | |||
| + | When using a library one can setup a callback using the <code>criu_set_notify</code> routine. | ||
Revision as of 15:26, 25 June 2014
The criu can call your hooks on various stages of dumping/restoring. Cooks can be one of
- network-lock
- request to lock an LXC container network
- network-unlock
- requested to unlock an LXC container network
- post-dump
- called when CRIU finished dumping tasks before unfreezing them
- setup-namespaces
- called when the root task is alive and new set of namespaces is created to set them up
CLI
These hooks are added with the --action-script shell-code-to-execute option. When called, the CRTOOLS_SCRIPT_ACTION environment is set to a value determining which type of action is performed.
RPC
In case or RPC, action scripts are implemented as notifications -- once CRIU service wants to execute a script it send an RPC message to caller and waits for it to respond with criu_req message having notify_success = true.
Library
When using a library one can setup a callback using the criu_set_notify routine.