[Users] Hostname issue on CentOS 7.x

[Jean-Pierre Abboud]

Hello everyone,

We’re facing an issue on many CentOS 7.x containers running cPanel. Clients are getting emails saying that the hostnames are not valid, for example it will show server1   instead of the fully qualified domain name server1.domain.com 

I have tried changing the hostname via cPanel or even manually but after rebooting it goes back to server1

The container’s openvz config does contain the appropriate HOSTNAME line
HOSTNAME=“server1.domain.com"

[root at server1 network-scripts]# cat /etc/hosts
127.0.0.1 localhost.localdomain localhost localhost4.localdomain4 localhost4
# Auto-generated hostname. Please do not remove this comment.
104.245.200.10 server1.domain.com localhost6 localhost6.localdomain6  server1 localhost.localdomain
::1             localhost

[root at server1 network-scripts]# cat /etc/hostname
server1

[root at server1 network-scripts]# cat /proc/sys/kernel/hostname
server1

[root at server1 network-scripts]# cat /etc/sysconfig/network
NETWORKING="yes"
GATEWAYDEV="venet0"
NETWORKING_IPV6="yes"
IPV6_DEFAULTDEV="venet0"
HOSTNAME=server1.domain.com
DOMAINNAME=domain.com

[root at server1 network-scripts]# cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)

Please note that I replaced the client’s domain and IP for privacy reasons.


Thank you!

--
Jean-Pierre Abboud
Account Manager / Gotekky
888.915.4400 / 514.316.1885
Email: jpabboud at gotekky.com