Fix/release ip

[l1b0k]

No description provided.

[Copilot]

Pull Request Overview

This PR refactors the IP release and resource management logic in the multi-IP node controller. Key improvements include better separation of concerns between IP allocation and cleanup phases, enhanced observability through additional metrics and events, and improved test infrastructure with reusable test helpers and factories.

• Separates cleanup logic from pool adjustment, allowing IP operations to proceed independently
• Adds comprehensive latency metrics and Kubernetes events for better observability
• Introduces test helper utilities (MockAPIHelper, NodeFactory, ENIFactory) to improve test maintainability

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
pkg/controller/multi-ip/node/pool.go	Core logic changes: separates cleanup from pool management, adds metrics/events, implements IP deletion verification
pkg/controller/multi-ip/node/metric.go	Adds new ReconcileLatency histogram metric for tracking method performance
pkg/controller/multi-ip/node/pool_test.go	Refactors tests to use new factory helpers, improving readability and reducing boilerplate
pkg/controller/multi-ip/node/pool_test_mocks_test.go	New mock helper utilities for setting up Aliyun API expectations in tests
pkg/controller/multi-ip/node/pool_test_factory_test.go	New factory utilities for creating test nodes, ENIs, and reconcilers
pkg/backoff/backoff.go	Adds backoff configuration for IP removal wait operations

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[codecov]

Codecov Report

❌ Patch coverage is 77.69784% with 31 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.87%. Comparing base (bd72ac0) to head (31dacfe).
⚠️ Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/controller/multi-ip/node/pool.go	77.69%	25 Missing and 6 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #920      +/-   ##
==========================================
+ Coverage   59.73%   59.87%   +0.13%     
==========================================
  Files         131      131              
  Lines       19795    19888      +93     
==========================================
+ Hits        11825    11907      +82     
- Misses       6807     6812       +5     
- Partials     1163     1169       +6     

Flag	Coverage Δ
unittests	59.87% <77.69%> (+0.13%)	⬆️

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