[Users] hostname issues with cPanel containers on OpenVZ node

[Narcis Garcia]

I remember something for MTA behavior depended on the names order at
/etc/hosts in VPS.
The difference:
127.0.1.1 myserver.example.net myserver
127.0.1.1 myserver myserver.example.net


El 26/09/17 a les 19:06, German D ha escrit:
> Hi everyone!
> 
> Recently we've faced hostname issue on container running on CentOS with
> cPanel. 
> 
> When container is rebooted, hostname became "server1" instead of
> "server1.example.com <http://server1.example.com/>". We understand that
> hostname shouldn't be FQDN, but unfortunately it breaks cPanel (we've
> faced at least 2 issues such as invalid HELO name and revoked
> certificate for WHM). So we made a patch for script
> /etc/vz/dists/scripts/redhat-set_hostname.sh. If the server running
> cPanel, it doesn't apply hostname. It would be great to add it to future
> updates of OpenVZ.
> 
> Details of the patch are below:
> 
> --- redhat-set_hostname.sh2017-09-21 02:27:57.080899967 -0600
> +++ redhat-set_hostname_new.sh2017-09-21 02:30:24.921061967 -0600
> @@ -28,8 +28,8 @@
>  
>  if [ -f /etc/hostname ]; then
>  # New style: RHEL7/Fedora15+
> -# Note hostname(5) says it should NOT be FQDN
> -val=${val%%.*}
> +# Note hostname(5) says it should NOT be FQDN, but it breaks cPanel
> +[ -e /usr/local/cpanel/version ] || val=${val%%.*}
>  echo "$val" > /etc/hostname
>  else
>  # "Classic" style
> 
> --
> Best regards,
> NK Support Team
> http://www.nksupport.com/
> 
> 
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