Collect container logs for restarted components in E2E tests

[XiShanYongYe-Chang]

What type of PR is this?

/kind cleanup

• Added log collection functionality to check_component_restart function
• Automatically collect logs from previous container instances using kubectl logs -p when Karmada components are detected to have restarted
• Save collected logs to $ARTIFACTS_PATH directory with filename format: ${component_name}-${pod_name}-previous-logs.log

What this PR does / why we need it:

• Facilitate troubleshooting of component restart causes (OOM, panic, etc.)
• Provide more detailed debugging information to improve issue identification efficiency
• Collect logs alongside other E2E test artifacts for comprehensive test reporting

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

• Log collection only occurs when component restarts are detected, no impact on normal test flow
• Added error handling to ensure log collection failures don't interrupt test execution

Does this PR introduce a user-facing change?:

NONE

[gemini-code-assist]

Summary of Changes

Hello @XiShanYongYe-Chang, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the debugging capabilities of E2E tests by introducing automatic log collection for restarted Karmada components. When a component restart is detected, the system now captures logs from the previous container instance, saving them as artifacts. This change aims to streamline troubleshooting of issues like OOM errors or panics, providing more comprehensive data for efficient problem identification and resolution, while ensuring no disruption to the standard test flow.

Highlights

• Enhanced E2E Test Debugging: Implemented automatic collection of previous container logs for restarted Karmada components during E2E tests.
• Log Collection Mechanism: Utilizes "kubectl logs -p" to retrieve logs from prior container instances, saving them to the "$ARTIFACTS_PATH" for analysis.
• Impact on Troubleshooting: Provides crucial debugging information for investigating component restarts (e.g., OOM, panic) without affecting normal test execution.
• Robustness: Includes error handling to ensure that failures during log collection do not interrupt the ongoing test execution.

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[karmada-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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Once this PR has been reviewed and has the lgtm label, please ask for approval from xishanyongye-chang. For more information see the Kubernetes Code Review Process.

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[gemini-code-assist]

Code Review

This pull request enhances the E2E test script to automatically collect logs from previous container instances when a component restart is detected. This is a valuable addition for debugging failures like OOMs or panics. The implementation is straightforward and includes error handling to prevent log collection failures from interrupting the test flow. I've provided one suggestion to improve the shell script's style and make the error reporting more helpful.

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.22%. Comparing base (a892fef) to head (d15b156).
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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6871      +/-   ##
==========================================
- Coverage   46.24%   46.22%   -0.02%     
==========================================
  Files         692      692              
  Lines       47194    47194              
==========================================
- Hits        21825    21817       -8     
- Misses      23717    23722       +5     
- Partials     1652     1655       +3     

Flag	Coverage Δ
unittests	46.22% <ø> (-0.02%)	⬇️

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[RainbowMango]

cc @zach593

[XiShanYongYe-Chang]

/retest