Hostname not fully set during Fuelmenu and breaks rabbitmq

[Scott Machtmes]

Summary: Fuel 9.0 - Despite the inclusion of hostnamectl in Fuelmenu from bug https://bugs.launchpad.net/fuel/+bug/1543357 , a hostname entered in Fuelmenu does not cause the server to boot up with correct hostname in all required locations.

The net effect is that rabbitmq gets broken and won't start by still being configured for the default fuel.domain.tld hostname.

Further Details:

- To reproduce, install a fuel server using default settings except hostname. Change the hostname to some new name.

- When fuel server completes and boots up to login prompt, login and compare /etc/hostname, /etc/hosts, and output of hostname command, uname -n, and hostnamectl status. There will be a mix of default and new hostname.

- /etc/hosts and /etc/hostname will have the new name.
- hostname command and uname -n will show the default fuel name. sysctl kernel.hostname shows the still default hostname present from the utsname structure.

Also, hostnamectl status will show mix of names. Example:

[root@fuel ~]# hostnamectl
   Static hostname: maui
Transient hostname: fuel.domain.tld
         Icon name: computer-vm
           Chassis: vm
        Machine ID: 9fe38d589a644660b3522847df186ca9
           Boot ID: 61ee4120e2064c57bb85dce97436d188
    Virtualization: kvm
  Operating System: CentOS Linux 7 (Core)
       CPE OS Name: cpe:/o:centos:centos:7
            Kernel: Linux 3.10.0-327.18.2.el7.x86_64
      Architecture: x86-64

Also as a result, rabbitmq fails to start due to default fuel name still present in /etc/rabbitmq/rabbitmq-env.conf. Changing the nodename in this file now will allow rabbitmq to start, however, rabbitmq will be missing many required vhosts, settings, perms. Rabbitmq has started with a default configuration at this point.

Final notes:
Rebooting the fuel server now again manually will yield the correct hostname when the server comes back up. But the damage has already been done to rabbitmq server.

[Oleksiy Molchanov (omolchanov)]

What fuel version is it?

[Scott Machtmes (smachtmes)]

My apologies, for the omission. It is Fuel 9.0. I've updated the bug description also.

[Dmitry Pyzhov (dpyzhov)]

FYI. Workaround for rabbitmq is described in bug #1630518

[Scott Machtmes (smachtmes)]

Should this bug be marked duplicate then?

[Oleksiy Molchanov (omolchanov)]

Scott, have you tried latest 9.x version?

[Oleksiy Molchanov (omolchanov)]

Scott, we have a fix for this issue https://review.openstack.org/#/c/346694/, but you can apply it just after you set up a master. Unfortunately it makes no sense.

[Dmitry Pyzhov (dpyzhov)]

@Scott, this bug is not duplicate because it also covers issue with stalled hostname in sysctl. We should fix it at least in master branch.

[Oleksiy Molchanov (omolchanov)]

Marking as won't fix, because patch can be applied just after you set up a master. Unfortunately it makes no sense.