[lxc-users] LXD Live Migration

[Tycho Andersen]

On Wed, Nov 04, 2015 at 01:48:44PM +0000, Jamie Brown wrote:
> Greetings all.
> 
> I’ve been using LXD in a development environment for a few weeks and so far very impressed, 
> I can see a really bright future for this technology!
> 
> However, today I thought I’d try out the live migration, based on the following guide;
> https://insights.ubuntu.com/2015/05/06/live-migration-in-lxd/
> 
> I believe I have followed the steps correctly, however when I run the move command, I 
> receive the following output;
> 
> # lxc move host1:test host2:test
> error: Error transferring container data: checkpoint failed:
> Problem accessing CRIU log: open /tmp/lxd_migration_899480871/dump.log: no such file or directory
> 
> The file it is referring to above doesn't exist. However, there are other lxd_migration_* 
> directories with different numbers appended. Each time I attempt the migration a new directory 
> is created (e.g. lxd_migration_192965652), but there is no dump.log in there.
> 
> The migration doesn't create a log file as per the guide above in;
> /var/log/lxd/test/migration_{dump|restore}_.log
> 
> Steps I've taken;
> 
> - Copied all profiles from host1 to host2
> - Added the migratable profile to the container
> - Removed lxcfs package (on both hosts)
> - Added the remote HTTPS hosts for both the local and remote hosts
> 
> Both hosts are running Ubuntu 14.04.3 LTS (x64) with LXD version 0.21.
> 
> The only difference I can tell between my hosts and the guide is that the 'migratable'
> profile (which came out-the-box with my LXD installation) doesn't contain the autostart
> entries as in the guide above;
> 
> # lxc profile show migratable
> name: migratable
> config:
>   raw.lxc: |-
>     lxc.console = none
>     lxc.cgroup.devices.deny = c 5:1 rwm
>     lxc.seccomp =
>   security.privileged: "true"
> devices: {}
> 
> 
> Any help would be much appreciated!

Have you installed CRIU? lxc info --show-log test probably has more
info about what failed, but my guess is that it can't find CRIU if you
haven't installed it.

Tycho

> Thank you,
> 
> Jamie
> 
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