On Wed, Feb 03, 2010 at 04:03:10PM +0200, Avi Weit wrote: > > Hello, > > I am searching for the libvirt operations for relocating LXC (system or > application) containers. LXC relocation mechanism is done by checkpoint / > restart. I went over libvirt API documentation and found the following > methods: > > virDomainSave that receives a domain and path to state file. The method > saves domain's memory contents into a disk file. > virDomainRestore that receives a domain and path to state file. The method > restores the domain from the state file created by save operation. > > Are these the proper methods to use for LXC relocation? I assume I can also > use the corresponding operations via virsh (save / restore).. > > >From looking into lxcDriver object (defined under /src/lxc/xlc_driver.c in > libvirt server source) I can see that NULLs are set in save and restore > methods. Does that mean that there is no support for saving and restoring > Linux containers? Is there a libvirt patch beyond the kernel patch that > needs to be applied? That is correct - the virDomainSave/Restore functions are intended to save the running guest/container state to a file or load it from a file, respectively. These operations have not yet been implemented for libvirt's LXC driver. I'm not sure how mature the kernel support for container save/restore is yet, but if it has stabilized sufficiently, then we will obviously accept patches from anyone wanting to try implementing... Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|
