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Ran 21 Jun 2024 05:45PM UTC

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Committed 21 Jun 2024 05:11PM UTC coverage: 71.496% (-0.002%) from 71.498%

Job # 01903bc8-798b-41ce-bd5b-c8557de7de2b.1

Build Type

push

buildkite

Committed by

web-flow

Commit Message

Persist failover history in DomainInfo data (#6139)

**What changed?**
Added functionality to persist recent failover event data in the DomainInfo whenever a valid failover is executed.
`FailoverEvent` contains the failover `timestamp`, `fromCluster`, `toCluster`, and `FailoverType`("Force"/"Grace") information.
`FailoverHistory` is the key in the `DomainInfo` `data`. It's a slice stored as a string containing the `FailoverEvents`, with max size defined by `dynamicconfig.FrontendFailoverHistoryMaxSize`. It has a default value of 5 and domain filter allowed.
`FailoverHistory` always keep the n most recent `FailoverEvents` and it's sorted by descending timestamp.

**Why?**
Persist failover information, improving failover visibility to clients and the cadence team.

**How did you test it?**
Unit tests and integration tests. Tested locally, triggering failovers in a multiple Cadence clusters with replication environment.

**Potential risks**
The change does not affect the logic of UpdateDomain. It adds the failover info to the DomainInfo data. The main risk is that we introduce something that can cause the code to panic. Errors while adding the FailoverHistory are logged as warnings and do not return/interrupt the UpdateDomain action.

**Release notes**

**Documentation Changes**

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