feat(CSI-303): add livenessProbe to attacher sidecar

[sergeyberezansky]

TL;DR

Added support for attacher metrics and leader election configuration in the CSI WekaFS plugin.

What changed?

• Added configureAttacherLeaderElection option in the controller section of values.yaml
• Included attacher metrics port (default 9095) in the Prometheus annotations
• Updated the csi-attacher container configuration in the controller deployment:
  • Added conditional leader election flags
  • Added HTTP endpoint for metrics
  • Included liveness probe for leader election health check
• Added attacherPort (default 9095) to the metrics section in values.yaml

How to test?

1. Deploy the chart with controller.configureAttacherLeaderElection set to true
2. Verify that the attacher container in the controller deployment has the leader election flags and liveness probe
3. Check if the Prometheus annotations include the attacher metrics port
4. Access the attacher metrics endpoint at http://<pod-ip>:9095/metrics

Why make this change?

This change enhances the CSI WekaFS plugin by:

1. Allowing users to configure leader election for the attacher sidecar, improving high availability and fault tolerance
2. Exposing attacher metrics, enabling better monitoring and observability of the CSI plugin's performance
3. Providing a health check endpoint for the attacher's leader election, ensuring proper functioning in distributed environments

[sergeyberezansky]

• refactor(CSI-305): change mount Map logic for WEKAFS to align with NFS and support same fs name on SCMC #383
• feat(CSI-300): add arm64 support #379
• feat(CSI-303): add livenessProbe to attacher sidecar #382 👈
• feat(CSI-302): convert controller StatefulSet to Deployment #381
• feat(CSI-301): bump locar to version 0.4.2 #380
• dev

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1 reviewer was added to this PR based on Sergey Berezansky's automation.

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Merge activity

• Oct 30, 3:26 AM EDT: A user started a stack merge that includes this pull request via Graphite.
• Oct 30, 3:27 AM EDT: Graphite couldn't merge this pull request because a downstack PR feat(CSI-301): bump locar to version 0.4.2 #380 failed to merge.
• Oct 30, 5:19 AM EDT: A user started a stack merge that includes this pull request via Graphite.
• Oct 30, 5:42 AM EDT: Graphite rebased this pull request as part of a merge.
• Oct 30, 5:45 AM EDT: Graphite rebased this pull request as part of a merge.
• Oct 30, 6:05 AM EDT: A user merged this pull request with Graphite.