[lxc-users] Trying out migration, getting "error: checkpoint failed"

[Tycho Andersen]

On Wed, May 27, 2015 at 06:26:56PM +0100, Giles Thomas wrote:
> Hi Tycho,
> 
> Sorry again for the slow turnaround!
> 
> On 15/05/15 18:59, Tycho Andersen wrote:
> >I suspect it still can't find criu and it just isn't finding the binary.
> >Can you symlink it into /bin just to be sure?
> 
> That didn't help.   However, installing criu from their github repo seems to
> have moved things on a bit.   Now, instead of getting "error: checkpoint
> failed", I get "error: restore failed".   Inside /var/log/lxd/migratee,
> there is a file called "migration_dump_2015-05-27T17:18:45Z.log", about 536K
> long.  I've not attached it, as I figure that would be pretty annoying for
> everyone else on the list, but I can sent it directly to you if it would be
> useful.   There is also a 78K lxc.log.
> 
> On the destination machine, there's also a /var/log/lxd/migratee/lxc.log,
> which is significantly shorter; here are the contents:
> 
>             lxc 1432744458.034 INFO     lxc_confile -
> confile.c:config_idmap:1390 - read uid map: type u nsid 0 hostid 100000
> range 65536
>             lxc 1432744458.034 INFO     lxc_confile -
> confile.c:config_idmap:1390 - read uid map: type g nsid 0 hostid 100000
> range 65536
>             lxc 1432744544.115 INFO     lxc_confile -
> confile.c:config_idmap:1390 - read uid map: type u nsid 0 hostid 100000
> range 65536
>             lxc 1432744544.115 INFO     lxc_confile -
> confile.c:config_idmap:1390 - read uid map: type g nsid 0 hostid 100000
> range 65536
>             lxc 1432744765.397 INFO     lxc_confile -
> confile.c:config_idmap:1390 - read uid map: type u nsid 0 hostid 100000
> range 65536
>             lxc 1432744765.398 INFO     lxc_confile -
> confile.c:config_idmap:1390 - read uid map: type g nsid 0 hostid 100000
> range 65536
>             lxc 1432747103.562 INFO     lxc_confile -
> confile.c:config_idmap:1390 - read uid map: type u nsid 0 hostid 100000
> range 65536
>             lxc 1432747103.563 INFO     lxc_confile -
> confile.c:config_idmap:1390 - read uid map: type g nsid 0 hostid 100000
> range 65536
>             lxc 1432747128.877 ERROR    lxc_criu - criu.c:criu_ok:333 -
> couldn't find devices.deny = c 5:1 rwm

Ah, this is a sanity check to make sure that various container config
properties are set. It looks like things aren't set on the destination
host correctly; I think there was a bug with this in the 0.9 client,
fixed by 6b5595d03dff7d360f05fa48ee6198d71e7f1ef4, so you may want to
upgrade to 0.10.

Tycho

> 
> All the best,
> 
> Giles
> 
> -- 
> Giles Thomas <giles at pythonanywhere.com>
> 
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