[lxc-users] lxc insttability

[Bostjan Skufca]

I had similar experience using CentOS 7 as host.

I did not investigate it yet, but for some reason veth network interfaces
were not being destroyed when containers stopped, and this could only be
seen with "brctl show" as more interfaces were attached to a bridge than
there were containers running. The effect was that multiple network
interfaces with the same MAC were attached to the bridge and successful
connections were, well, sporadic.

On the first inspection it only happened to some containers that had
explicit mounts from outside (unconfirmed!, just a hunch for now).

b.




On 19 February 2016 at 02:23, Király, István <laking at d250.hu> wrote:

> Hello list, ..
>
> I'm wondering if anyone experienced this ...
>
> Randomly after some operation, eg, starting / stopping / adding
> containers, or some software installation one-two containers start being
> errorrous. ssh is running in the container, but connections from the host
> get refused, nfs that worked stops to work, errno 111 (Connection refused),
> webservers go down, .. Ping responds usually fast, and lxc-attach works,
> but then ... slowly the number of faulty containers grow, until all
> containers get unresponsive, and at the end even the host can get
> unresponsive. After the host is rebooted everything starts up, and works,
> and things operate again normal for months, .. with 120 containers or even
> more.
>
> I'm wondering where the bug might be, and how to find it. I use the
> default libvirt network, maybe the bug is over there, but since i didnt
> find a way to reproduce this, Im kind of tapping in the dark. On my
> development server it happens often, where I change configurations
> frequently ... but needless to say, sometimes that can hhappen on
> production-like systems .. :/
> I use the packaged fedora lxc now. I know that the dev is more taking
> place on ubuntu, but I would like to stick to fedora.
>
> So anyone saw anything similar?
>
> Greetings, ...
>
>
>
> --
>  Király István
> +36 209 753 758
> LaKing at D250.hu
> <http://d250.hu/>
>
> _______________________________________________
> lxc-users mailing list
> lxc-users at lists.linuxcontainers.org
> http://lists.linuxcontainers.org/listinfo/lxc-users
>
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