[lxc-users] lxc-start failed to retrieve the index for eth1

[Christian Tardif]

Hi,

I'm on CentOS 6.5, kernel 3.10.59, lxc-1.0.5 (have another installation 
with 1.0.6, and it gives the same result)

Here's the sequence that leads to my problem:

1) Boot the host
     - Have 4 different interfaces, only eth0 configured (my management 
ip), eth1, eth2, and eth3 are used as physical devices for containers

2) Boot a container (hooked to eth1)
     - Works OK, got the IP in the container, all works great

3) Shutdown the container

4) Boot the container again and voilà!  Getting this:
     - lax-start: failed to retrieve the index for eth1

For now, the only way to get my container back is to.....  reboot the 
host  :-(

Here's what I found on the list:

https://www.mail-archive.com/lxc-users@lists.sourceforge.net/msg01769.html

This is exactly my problem. My eth1 device became dev3. For sure I can 
use dev3 in the config file, and then the container will be able to 
reboot as I want...  until the host reboots. At boot time on the host, 
dev3 does not exists.

The thread suggests that this problem has fixed in 0.7.4.1 but....  I'm 
on 1.0.5

I found the issue. The problem comes, in fact, when, in the config file, 
you have different name between the link (the eth card on the host) and 
the nic name in the container. I always use to have eth0 as the first 
nic on a host, being physical, virtual, or container. And that's the 
problem, here. The config files says to use eth1, eth2, eth3, .....  
while all my containers are at eth0. If I change this behaviour so the 
physical link is eth1 and the container eth card is also eth1, then I 
get no problem at all. I can reboot the host, reboot the container 
hundreds of times, and it always work. But as soon as I get a 
discrepancy between the host eth card name and the container eth card 
name, I'm stucked.

Has anyone experienced that this way?

--------------------------------------------------------------------------------

Christian Tardif
christian.tardif at servinfo.ca


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