Add DB node RH OS procedure

[Slobodan Blatnjak]

This is about procedure to add/replace new DB node in Contrail.
For Ubuntu we have this one: https://github.com/Juniper/contrail-controller/wiki/Removing_Adding_DB_Node
line: " echo "manual" >> /etc/init/supervisord-contrail-database.override"
-prevents starting cassandra and supervisor-database immediately after installing contrail-openstack-database:
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2016-12-05 05:08:19:895606: [root@172.30.157.205] out: ======= Enabling the services ======
2016-12-05 05:08:19:911500: [root@172.30.157.205] out: ======= Starting the services ======
2016-12-05 05:08:20:112792: [root@172.30.157.205] out: Rest[ OK ]upervisor-database (via systemctl):
2016-12-05 05:08:23:350629: [root@172.30.157.205] out:
2016-12-05 05:08:23:350861: [root@172.30.157.205] out: Rest[ OK ]assandra (via systemctl):
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This will not work for RH OS.
Also, following one "vi /etc/zookeeper/conf/myid - fixup server id as 4 instead of 3" will not work. In RH myid is in /var/lib/zookeeper/data/
If I understand in correctly RH doesn't have something like that (service first has to be installed and then disabled). Than what to do in this case? Could it be harmful for the cluster, and if yes how can we prevent starting those services after installation?

[Jeba Paulaiyan (jebap)]

Testing and code commits needed are made as part of Bug 1654151. Need to review documentation.

[Ranjeet R (rranjeet-n)]

As mentioned above, the bug was fixed as part of 1654151. As mentioned in the bug, we have handled the myid case separately for redhat in the code.