Add `sync.Group` to wait for the election goroutines to exit for etcd storage

apache / kvrocks-controller

Apache Kvrocks Controller is a cluster management tool for Apache Kvrocks.

https://kvrocks.apache.org/

Apache License 2.0

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Closed jihuayu closed 7 months ago

jihuayu commented 7 months ago

In this PR, I added sync.Group to the etcd storage to wait for the goroutines (observeLeaderEvent and electLoop) for the election to exit.

In addition, I fixed the bug in test case.