[lxc-users] LXC, criu and cgroups...

[Dirk Geschke]

Hi Tycho,

I'm one step further again. rsync seems to use nc -U, but this
option is not part of netcat.traditional, but netcat.openbsd 
knows it. So with this packages I'm one step ahead.

I guess, one should react on errors if rsync fails...

Now it stops at:

   2015/04/07 21:51:45 client cert != key for 192.168.1.233
   2015/04/07 21:51:45 allowing untrusted GET to /1.0/operations/70d96f6d-5dd0-49dc-b86c-c5e33702a01d/websocket?secret=LhfAenvHyoM2p4ycwkvYdc5pU6cX9XuLIh%2FLr8b6luTEkBqn4gjf81KEnbbEKXLdLMxGWKTbBQaPTaP8hwMPAx89rLI0FQLDK%2FfvX45RlcvbUHRuMGfW3PH9ijRmdLOEzHhm8g%3D%3D
   2015/04/07 21:51:47 got error getting next reader websocket: close 1005, &{{%!s(*net.netFD=&{{10 0 0} 15 1 1 false unix 0xc2080e1b60 0xc2080e1b80 {139714654178008}})}}

The first two messages are irritating, but it seems to work. On
the target host, I can find the img-files in /var/tmp/lxd_migration_...

But then, nothting else. After a reboot of the source host, nothing
changes. On the source host I see again:

   2015/04/07 22:06:51 got error getting next reader websocket: close 1005 , &{{%!s(*net.netFD=&{{10 0 0} 14 1 1 false unix 0xc20811d780 0xc20811d7a0 {140705565387480}})}}

and on the target system:

   2015/04/07 22:06:51 got error getting next reader read tcp 192.168.1.233:8443: use of closed network connection, &{%!s(*os.File=&{0xc2080d6ae0}) {{%!s(int32=0) %!s(uint32=0)} %!s(uint32=0)} <nil>}

strange...

> > PS: I was not aware, that simply installing lxcfs will start it,
> >     I did not even see it running. But probably it installs some 
> >     lxc hooks for the bind mounts...
> 
> Yep, that's exactly right. Unfortunately, there are a couple of
> problems with lxcfs: criu doesn't understand overmounting, and criu
> doesn't understand how to dump fuse filesystems. So for now, we can't
> c/r containers with lxcfs.

Ah, okay, systemd in a container seems to be no good idea at all.
It takes multiple times more to start then plain old SysVInit...

Best regards

Dirk

-- 
+----------------------------------------------------------------------+
| Dr. Dirk Geschke       / Plankensteinweg 61    / 85435 Erding        |
| Telefon: 08122-559448  / Mobil: 0176-96906350 / Fax: 08122-9818106   |
| dirk at geschke-online.de / dirk at lug-erding.de  / kontakt at lug-erding.de |
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