feat: when the redis is disabled, AnnounceHost need to skip store redis

[gaius-qi]

Description

This pull request introduces several changes to ensure that the persistent cache feature is only used when Redis is enabled. The changes include adding checks for the presence of the persistentCacheResource before performing operations related to the persistent cache.

Persistent Cache Feature Enhancements:

• Added a check to initialize the persistent cache resource only if rdb is not nil in func New in scheduler/scheduler.go.
• Updated AnnounceHost to return early if persistentCacheResource is nil, indicating that Redis is not enabled, in scheduler/service/service_v2.go.
• Modified various methods to return an error if persistentCacheResource is nil, ensuring operations are skipped when Redis is not enabled, in scheduler/service/service_v2.go:
  • AnnouncePersistentCachePeer
  • StatPersistentCachePeer
  • DeletePersistentCachePeer
  • UploadPersistentCacheTaskStarted
  • UploadPersistentCacheTaskFinished
  • UploadPersistentCacheTaskFailed
  • StatPersistentCacheTask

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 33 lines in your changes missing coverage. Please review.

Project coverage is 35.17%. Comparing base (a370da1) to head (3af60b5).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
scheduler/service/service_v2.go	0.00%	26 Missing and 1 partial ⚠️
scheduler/scheduler.go	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3712      +/-   ##
==========================================
- Coverage   35.24%   35.17%   -0.07%     
==========================================
  Files         335      335              
  Lines       37775    37803      +28     
==========================================
- Hits        13314    13298      -16     
- Misses      23635    23676      +41     
- Partials      826      829       +3     

Flag	Coverage Δ
unittests	35.17% <0.00%> (-0.07%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
scheduler/scheduler.go	0.00% <0.00%> (ø)
scheduler/service/service_v2.go	67.28% <0.00%> (-1.19%)	⬇️

... and 3 files with indirect coverage changes