[lxc-users] Setting hostname different than container name

[Ron Kelley]

Awesome, thanks Stephane. We can use the raw lxc command as a good fix.




On August 19, 2017 7:43:34 PM Stéphane Graber <stgraber at ubuntu.com> wrote:

> On Sat, Aug 19, 2017 at 04:48:51PM -0400, Ron Kelley wrote:
>> Greetings all,
>>
>> Trying to set the container hostname different that the container name.  
>> Editing /etc/hostname and /etc/hosts seems to work on Ubuntu but not on 
>> CentOS 6 containers.  What is the proper way to set the hostname so it is 
>> persistent among reboots for CentOS containers?  The LXD config guide 
>> (https://github.com/lxc/lxd/blob/master/doc/configuration.md) has no 
>> mention of a hostname keyword.
>
> I'm not very familiar with RHEL/Centos and indeed couldn't find an easy
> way (short of using /etc/rc.local) to set the hostname in a Centos 6
> container the way I'd expect it to work...
>
> It looks like centos6 looks at the kernel utsname and if it's already
> set, won't change it, no matter what you put in /etc/hostname or
> /etc/sysconfig/network. Though maybe I'm missing something and one of
> our Red Hat / CentOS users will know how to get around this.
>
>
> At the LXD level, you can use raw.lxc to force the utsname to another
> value and that part does seem to work:
>
>     lxc config set c1 raw.lxc lxc.utsname=some-name
>
> --
> Stéphane Graber
> Ubuntu developer
> http://www.ubuntu.com
>
>
>
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