[lxc-users] lxc insttability

[Guido Jäkel]

Dear Bostjan

The veth will not disappear after shutdown of the container until all pending TCP connections through this veth-pair are timed out (CLOSE/FIN-WAIT). Sometimes, i even can't delete it on the host. And because, i name the host-side of each veth to the name of the container, i have to get rid of it to start the Container again. I use

	ip link set dev $DEV name away.$RANDOM

to archive this

Guido




On 19.02.2016 17:08, Bostjan Skufca wrote:
> Does it delete both interfaces, the one in host's namespace which is added
> to bridge (vethX) and the one in container's namespace (appears as ethX in
> there) too?
> 
> b.
> 
> 
> On 19 February 2016 at 11:58, Fajar A. Nugraha <list at fajar.net> wrote:
> 
>> On Fri, Feb 19, 2016 at 5:41 PM, Bostjan Skufca <bostjan at a2o.si> wrote:
>>
>>> 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).
>>>
>>>
>>
>> I use a workaround:
>>
>> # ls -la /etc/lxc/script/net-down
>> -rwxr-xr-x 1 197623 197121 36 Apr 27  2015 /etc/lxc/script/net-down
>>
>>
>> # cat /etc/lxc/script/net-down
>> #!/bin/bash
>> /sbin/ip link del "$5"
>>
>>
>> # grep script /var/lib/lxc/rdp/config
>> lxc.network.script.down = /etc/lxc/script/net-down
>>
>>
>> The correct interface name is passed as argument to script executed
>> by lxc.network.script.down.
>>
>> --
>> Fajar
>>
>>
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>>
> 
> 
> 
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