By: John Bryson user 26 Mar 2015 at 3:07 p.m. CDT

3 Responses
John Bryson gravatar
We have installed the centos rpm on our Redhat RHEL6 platform. Most things seem fine. However restart of the application, changes the hostname GLUU.[root@pariksha ~]# hostname <<<< Correct and expected host name GLUU.[root@pariksha ~]# logout service gluu-server stop Shutting down Gluu Server... Stopping opendj... OK Stopping Tomcat... Failed Stopping Apache... Failed service gluu-server start Starting Gluu server, please wait... hostname We have seen that name in this file, under the chroot: cd /home/gluu-server/etc grep -ri . ./sysconfig/ Once the hostname is changed, we would have to get a system admin to get us back into the system, since our login processes are depending on the hostname being the original string.

By Mohib Zico staff 26 Mar 2015 at 3:48 p.m. CDT

Mohib Zico gravatar
You can change the hostname permanently in this way: * Apply desired hostname in "network" ( /etc/sysconfig/network ) * Log into chroot container as root. * Again - Apply desired hostname in "network" ( /etc/sysconfig/network ) * Check if your hostname is included in /etc/hosts file; if not add it with proper IP address. * Apply command: hostname <new_hostname> (without < > ) * Apply command: service network restart Feel free to let us know how it is going there.

By Bert Bee-Lindgren user 26 Mar 2015 at 8:43 p.m. CDT

Bert Bee-Lindgren gravatar
Thank you for the information. I think it will work to prevent breakage. From a slightly philosophical and a slightly forward-looking viewpoint... It's suboptimal for an application to reconfigure the global host information when it is run (hostname, ip address, etc), even if that application is partially pretending to be a virtual machine. Perhaps docker does the right thing in these cases and it will matter less. However, if these host-config changes cannot be prevented or cannot be made to refer to the global OS configuration (eg, have the start scripts update the chroot /etc/sysconfig files from the host's current information), then I suggest a document or FAQ about what is stored in that chroot area that needs to be updated when a host needs to be readdressed or renamed.

By Mohib Zico staff 31 Mar 2015 at 8:51 a.m. CDT

Mohib Zico gravatar
John / Bert, I am closing this ticket for now. Please feel free to open a new one if you have any other issue or question. Kind regards, Zico