[library] Deployment fails: DNS resolving is broken on nodes with Mongo role

[Artem Panchenko]

Fuel version info (6.1 build # 234): http://paste.openstack.org/show/197658/

Environment deployment fails on Ubuntu if 'Ceilometer' is enabled, because after deployment (dns-client.pp) of nodes with 'mongo' role, they can't resolve DNS names:

http://paste.openstack.org/show/197660/

Steps to reproduce:

1. Create new environment: Ubuntu, Neutron+Vlan, Ceph for all, Ceilometer
2. Add 3 controller+mongo nodes and 1+ compute+ceph nodes
3. Enable 'Classic' provision method on settings tab
4. Start deployment

Expected result:

- cluster successfully deployed and passes health checks

Actual:

- cluster deployment failed

Here is a content of '/etc/resolv.conf/' file on controller+mongo node after deployment failed:

http://paste.openstack.org/show/197661/

and tasks deployment sequence:

http://paste.openstack.org/show/197664/

As you can see node was configured to use management VIP as DNS resolver before controller roles were deployed.

[Artem Panchenko (apanchenko-8)]

Seems that image based provisioning on Ubuntu isn't affected, because resolvconf is unable to update '/etc/resolf.conf':

root@node-1:~# cat /etc/resolv.conf
# re-generated by cloud-init boothook only at the first boot;
search mirantis.com
domain mirantis.com
nameserver 172.16.39.130
root@node-1:~# resolvconf -u
/etc/resolvconf/update.d/libc: Warning: /etc/resolv.conf is not a symbolic link to /run/resolvconf/resolv.conf
root@node-1:~# ls -1l /etc/resolv.conf
-rw-r--r-- 1 root root 127 Mar 31 11:54 /etc/resolv.conf

but I think this breaks 'external dns' feature (see blueprint external-dns-ntp-support)

[Oleksiy Molchanov (omolchanov)]

Artem,

We are waiting for patch to fix the issue you described in last comment
https://bugs.launchpad.net/fuel/+bug/1434232

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/169321

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/169321
Committed: https://git.openstack.org/cgit/stackforge/fuel-library/commit/?id=71d9b80942b8096e2510644e403bbaf6e08cb3c1
Submitter: Jenkins
Branch: master

commit 71d9b80942b8096e2510644e403bbaf6e08cb3c1
Author: Oleksiy Molchanov <email address hidden>
Date: Tue Mar 31 17:04:29 2015 +0300

    Configure resolv.conf in post-deploy

    Configure resolv.conf to run in post-deploy stage

    Change-Id: I4600cfa97466fad4fc70dd2e6b03b1d7a02b2509
    Closes-Bug: 1438591