Step Q: Re-enable high availability

1. If you're using a virtual machine (VM), take a snapshot before you enable HA. See the VMware VSphere help text for more information.

2. On the web interface for the primary Conductor Live node, go to the Cluster page and choose Redundancy. In the High Availability field, choose Enable.

To verify that HA is correctly enabled, follow these steps on each Conductor Live node.

1. At your workstation, start a remote terminal session to the Conductor Live node.

2. Enter the following command to verify that Conductor Live HA is enabled:

   [elemental@hostname log]$ tail -F /opt/elemental_se/web/log/conductor_live247.output

   The conductor_live247.output log starts to scroll on the screen and shows messages as they are occurring. Watch for the following INFO lines on the primary Conductor Live node:

   CONDUCTOR: Initializing environment
   I, [2015-11-13T04:37:54.491204 #4978]  INFO -- : Configuring the HA environment
   I, [2015-11-13T04:37:54.660644 #4978]  INFO -- : configuring keepalived
   .
   .
   .
   I, [2015-11-13T04:38:03.905069 #4978]  INFO -- : Elemental Conductor is ready

3. Press Ctrl - C to exit the tail command.

4. Enter the following commands:

   [elemental@hostname ~]$ sudo -s
   [elemental@hostname ~]$ cd /data/pgsql/logs
   [elemental@hostname ~]$ tail -F postgresql-<day>.log

   where <day> is today (the day you are upgrading), typed with an initial capital letter: Mon, Tue, Wed, Thu, Fri, Sat, Sun

5. Confirm that you see database system is ready to accept connections on the primary Conductor Live, and database system is ready to accept read only connections on the secondary Conductor Live.

6. Press Ctrl - C to exit the tail command.

7. Type the following command to exit the session as the sudo user:

   [elemental@hostname ~]$ exit