[Bug]: Trivy Analyzer has concurrent map write issue about k8sgpt HOT 2 OPEN

hi, I will fix this, and create PR soon

from k8sgpt.

I have implemented a solution and I'm ready to submit a PR if you approve.

1. Proposed Solution:
   To address this issue, we propose introducing a mutex lock to synchronize access to the mergedAnalyzerMap. This will ensure that only one goroutine can modify the map at a time, preventing race conditions and maintaining data integrity.

2. Implementation Steps:
   a. Import the sync package in the relevant files.
   b. Add a sync.Mutex field to the Trivy struct in the trivy.go file.
   c. Modify the AddAnalyzer method to use the mutex for synchronization:

   • Acquire the lock before modifying the mergedAnalyzerMap.
   • Release the lock after the modification is complete.
     d. Update any other methods that access or modify the mergedAnalyzerMap to use the mutex.

3. Impact Analysis:

   • Positive impacts:
     • Eliminates race conditions and ensures data integrity.
     • Improves overall stability and reliability of the Trivy Analyzer integration.
   • Potential drawbacks:
     • Slight performance overhead due to mutex operations.
     • May introduce potential deadlocks if not implemented carefully.

4. Testing Plan:
   a. Unit Tests:

   • Develop unit tests that simulate concurrent access to the AddAnalyzer method.
   • Verify that the mutex correctly synchronizes access to the mergedAnalyzerMap.
     b. Integration Tests:
   • Create integration tests that exercise the Trivy Analyzer in a concurrent environment.
   • Ensure that no race conditions occur during parallel execution of multiple analyzers.
     c. Performance Testing:
   • Conduct performance tests to measure the impact of the mutex on overall system performance.
   • Compare results with the previous implementation to ensure acceptable performance.
     d. Code Review:
   • Perform a thorough code review to ensure proper implementation of the mutex and identify any potential issues.

5. Implementation Details:
   File: /home/ubuntu/k8sgpt/pkg/integration/trivy/trivy.go

   • Add a new field to the Trivy struct: mu sync.Mutex
   • Modify the AddAnalyzer method:

     func (t *Trivy) AddAnalyzer(mergedMap *map[string]common.IAnalyzer) {
         t.mu.Lock()
         defer t.mu.Unlock()
         // Existing code for adding analyzers
     }

   File: /home/ubuntu/k8sgpt/pkg/analyzer/analyzer.go

   • Ensure that the call to AddAnalyzer is thread-safe:

     in.AddAnalyzer(&mergedAnalyzerMap)

     (This call is already correct, as the synchronization is handled within the AddAnalyzer method)

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