We just built a new HA controller pair on 4.5.9.2, utilizing the Enterprise Console for the first time. The EC runs on a stand-alone server. As we tested the HA failover from the GUI, everything appeared to work properly, but at the CLI we could see that the watchdog process was not starting on the passive node. We expected to see the watchdog running as it does on our 4.3.5.7 production system. The EC GUI does not provide this level of detail and shows everything is healthy; however, we do not have confidence that our HA is working properly so we opened a support ticket. Shown below is what AppD Support is advising me to do:
"Please be aware that there are known issues in Enterprise Console that affect its high availability, (HA), and service life cycle functionalities:
ECONSOLE-2711: If EC is down, then EC-based controller HA failover won't happen
ECONSOLE-3853: "Start database" job does not start a down database on the primary controller host
The issues noted above can prevent HA fail-overs from happening when they are needed, and increase the difficulty of restarting controller services after a host crash, causing preventable controller down-time.
To work around these issues, we recommend the following steps:
1) If you are using Enterprise Console's automatic failover feature, disable it.
2) Avoid using Enterprise Console to manage the lifecycle of controller components, establish or re-establish MySQL replication, or failover between nodes in an HA controller pair
3) Please install or upgrade and use the legacy HA toolkit and its bundled init scripts for the following functions:
-Starting and stopping the controller and its database
-Establishing or re-establishing MySQL database replication
-Manual and automatic failover between controller nodes"
I can find no 'known issues' or AppD publications online that would indicate that the EC is not ready for prime time. I am reaching out to the Community to see if anyone else is having trouble with the 4.5.9.2 EC, or is aware of the EC problems noted above.
