From:
"Daniel P. Berrange" <berrange@redhat.com>
To:
Avi Weit/Haifa/IBM@IBMIL
Cc:
libvirt-users@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
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
Hi Daniel, I wanted to ask on whether virDomainSave/Restore functions of libvirt are implemented now for the LXC containers? If yes, what libivrt version should I install please? Thanks, - Avi "Daniel P. Berrange" <berrange@redhat.com> wrote on 04/02/2010 03:44:49 PM: 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...
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