[Lxc-users] Can't connect to an LXC container after restart

[Serge Hallyn]

Quoting David Parks (davidparks21 at yahoo.com):
> I was playing with a container today, we took the following actions:
> 
> .         Change from static to DHCP IP

Exactly how?  What is the guest distro+release?

> .         Shut down container, add an fstab entry to LXCs fstab file

What entry did you add?

> .         Started, failed to start
> 
> .         Undid all changes, re-configured static IP and removed the fstab
> entry
> 
>  
> 
> Now when I try to start the container I see this in the debug log -o
> debugfile -l DEBUG:
> 
>  
> 
>      lxc-start 1367826547.900 DEBUG    lxc_conf - umounted
> '/lxc_putold/sys/kernel/security'
> 
>       lxc-start 1367826547.900 DEBUG    lxc_conf - umounted
> '/lxc_putold/proc'
> 
>       lxc-start 1367826547.900 DEBUG    lxc_conf - umounted
> '/lxc_putold/mnt/hdfs'
> 
>       lxc-start 1367826547.900 DEBUG    lxc_conf - umounted
> '/lxc_putold/dev'
> 
>       lxc-start 1367826547.900 DEBUG    lxc_conf - umounted
> '/lxc_putold/run'
> 
>       lxc-start 1367826547.900 DEBUG    lxc_conf - umounted
> '/lxc_putold/sys/fs/cgroup'
> 
>       lxc-start 1367826547.900 DEBUG    lxc_conf - umounted
> '/lxc_putold/sys'
> 
>       lxc-start 1367826547.900 DEBUG    lxc_conf - umounted '/lxc_putold'
> 
>       lxc-start 1367826547.900 INFO     lxc_conf - created new pts instance
> 
>       lxc-start 1367826547.900 INFO     lxc_conf - set personality to '0x0'
> 
>       lxc-start 1367826547.900 DEBUG    lxc_conf - drop capability
> 'sys_module' (16)
> 
>       lxc-start 1367826547.900 DEBUG    lxc_conf - drop capability
> 'mac_admin' (33)
> 
>       lxc-start 1367826547.900 DEBUG    lxc_conf - capabilities has been
> setup
> 
>       lxc-start 1367826547.900 NOTICE   lxc_conf - 'testsandboxa01' is
> setup.
> 
>       lxc-start 1367826547.900 INFO     lxc_start - changed apparmor profile
> to unconfined
> 
>       lxc-start 1367826547.900 NOTICE   lxc_start - exec'ing '/sbin/init'
> 
>       lxc-start 1367826547.917 NOTICE   lxc_start - '/sbin/init' started
> with pid '32017'
> 
>       lxc-start 1367826547.917 WARN     lxc_console - console input disabled
> 
>       lxc-start 1367826547.917 WARN     lxc_start - invalid pid for SIGCHLD
> 
>       lxc-start 1367826561.715 DEBUG    lxc_commands - peer has disconnected
> 
>  
> 
> I can connect to the console, but I get nothing back from the console, I
> can't SSH to the container, it just appears hung. We had this container
> running fine for weeks now, only on the restart did I get this, and I'm
> reasonably confident that we un-did any changes we had made in our testing.

What does 'sudo lxc-ps -n testsandboxa01' show?

-serge