We monitor the health of DB replicas, and on a fatal error,
take them out of the pool.
On a separate goroutine, we keep pinging the unhealthy replicas,
and on getting a good response back, we add them back to the pool.
https://mattermost.atlassian.net/browse/MM-50427
```release-note
Mattermost is now resilient against DB replica outages and will
dynamically choose a replica if it's alive.
Also added a config parameter ReplicaMonitorIntervalSeconds
whose default value is 5. This controls how frequently unhealthy
replicas will be monitored for liveness check.
```
Co-authored-by: Mattermost Build <build@mattermost.com>
* Enable products for channels tests
* increase unit test timeout; check IsConfigReadOnly
* make app-layers
* Avoid loading boards tempaltes between tests to improve speed
* Fix delete query to be compatible with both databases
* Avoid preserving the templates for boards store tests
* Run all tests in one command
* Revert "Run all tests in one command"
This reverts commit 0330f7cd8f96b47776770e8f80ba6ba18d98b8d1.
* concurrent pkg group tests in CI
* Revert "Revert "Run all tests in one command""
This reverts commit 73892fec772575ff054a99ba9e00a7b57ca74164.
* Revert "concurrent pkg group tests in CI"
This reverts commit 550fb6cdd4a7f14d9632f2626bc66f389173b5d9.
* try testing 3 subsets of packages concurrently to improve time taken
* Revert "try testing 3 subsets of packages concurrently to improve time taken"
This reverts commit 97475f3c4eafa8bbe047097e0841220884f68cdc.
---------
Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: wiggin77 <wiggin77@warpmail.net>
