UCP: support AutoSclaerRef for TidbCluster

[Yisaer]

Description

Currently, 1 tidbcluster could be controlled by multi TidbclusterAutoScaler which is not we want. We need 1 tidbcluster should be controlled by no more than 1 TidbclusterAutoScaler.

To achieve this purpose, We want to add a new attribute in TidbCluster Status and named as AutoSclaerRef.

The AutoSclaerRef would be kind like mutex that the TidbclusterAutoScaler should first patch itself to the target Tidbcluster's AutoSclaerRef. If success, it would start to sync the auto-scaler procss for the target tidbcluster. If not success, it just only skip the current syncing.

The controller logic is much more similar as MonitorRef, you can know the reference from this pr. #2424

Score

• 400

Mentor(s)

• @yisaer

Contact the mentors: #tidb-challenge-program channel in TiDB-Operator Community Slack Workspace
As the logic is not simple and the detail is still needed to be discussed, we are welcome for every challenger to contact the mentor if you have any questions.

Recommended Skills

• Golang
• Kubernetes

[sre-bot]

@PengJi don't have enough score, pick up failed

Progress 0/200
You may pick up some easy issues first

[sre-bot]

@PengJi don't have enough score, pick up failed

Progress 0/200
You may pick up some easy issues first

[Yisaer]

@PengJi assign the challenge to you, take your time.

[PengJi]

@Yisaer OK，I'm interested in it

[Yisaer]

@PengJi Hi, this feature is important to Auto-scaling, so I'm going to realize this feature myself as it seems haven't any progress now.