Action scripts

Revision as of 15:26, 25 June 2014 by Xemul (talk | contribs)

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.