[lxc-users] LXD Live Migration

[Jamie Brown]

That is also my ultimate target, but do understand this project is not yet considered ready for production. If you don't have vSphere capabilities at the moment, then LXD is still a step forward as managing multiple hosts is much simpler, and copying offline containers between hosts works great. Hopefully my problem is a straightforward one.

On 4 Nov 2015, at 15:50, Saint Michael <venefax at gmail.com<mailto:venefax at gmail.com>> wrote:

I am about to get rid of vmware ESX and use only Ubuntu + LXD +LXC, but I will hold a little longer.

On Wed, Nov 4, 2015 at 8:48 AM, Jamie Brown <Jamie.Brown at mpec.co.uk<mailto:Jamie.Brown at mpec.co.uk>> 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!

Thank you,

Jamie

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