fix panic error on containerd id finder task

[kyasbal]

The logutil.ExtractKLogField can return an empty string without error. This can cause panic on the ID finder.

[kyasbal]

/gemini review

[gemini-code-assist]

Code Review

This pull request correctly addresses a panic caused by an empty string return from logutil.ExtractKLogField. The fix prevents the panic by adding a check and returning an error. The inclusion of new test cases to cover this scenario is a great addition. I have a couple of suggestions to improve the error handling to make it more robust by preserving the original error information, and a minor suggestion to improve the clarity of a test case description.

[kyasbal]

/gemini summary

[gemini-code-assist]

Summary of Changes

This pull request addresses a critical panic error within the containerd ID finder task by refining the error handling logic when extracting log fields. The changes ensure that both extraction errors and empty message scenarios are explicitly caught and reported with specific error messages, preventing unexpected crashes. The update also includes new test coverage to validate the improved robustness of these functions.

Highlights

• Panic Error Fix: Resolved a panic error in the containerd ID finder task that occurred when logutil.ExtractKLogField returned an empty string without an error.
• Improved Error Handling: Refactored error handling in findPodSandboxIDInfo and findContainerIDInfo to explicitly differentiate between extraction errors and cases where the main message is empty, returning more descriptive errors.
• New Test Cases: Added new test cases for processPodSandboxIDDiscoveryForLog and processContainerIDDiscoveryForLog to cover scenarios with empty log messages, enhancing test coverage for robustness.

Changelog

• pkg/task/inspection/googlecloudlogk8snode/impl/containerd_task.go
  • Modified findPodSandboxIDInfo to separate error checking for logutil.ExtractKLogField results, handling err != nil and msg == "" distinctly with specific fmt.Errorf messages.
  • Modified findContainerIDInfo with similar separated error handling logic for logutil.ExtractKLogField results.
• pkg/task/inspection/googlecloudlogk8snode/impl/containerd_task_test.go
  • Added TestProcessPodSandboxIDDiscoveryForLog to test the processPodSandboxIDDiscoveryForLog function, including a test case for an empty message.
  • Added TestProcessContainerIDDiscoveryForLog to test the processContainerIDDiscoveryForLog function, including a test case for an empty message.

Activity

• kyasbal requested a Gemini review.
• gemini-code-assist[bot] provided review comments suggesting to separate error checks for err != nil and msg == "" in findPodSandboxIDInfo and findContainerIDInfo for clarity and robustness.
• gemini-code-assist[bot] suggested renaming a test case description from "log message without RunPodSandbox prefix" to "empty log message" for accuracy.
• kyasbal requested a Gemini summary.