Re: [libvirt-users] [libvirt] [LXC] Tyring to locate livbvirt operations for LXC relocation

From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; To: Avi Weit/Haifa/IBM@IBMIL Cc: libvirt-users(a)redhat.com Date: 04/02/2010 03:45 PM Subject: Re: [libvirt-users] [libvirt] [LXC] Tyring to locate livbvirt operations for LXC relocation 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

> 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

> 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

> use the corresponding operations via virsh (save / restore).. > > >From looking into lxcDriver object (defined

> 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

> 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

the running guest/container state to a file or load it from a file, respectively. These operations have not yet been implemented for

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-

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