Address review suggestions for better thread safety and code clarity:
1. **Thread Safety**: Add RWMutex to FilerEtcStore
- Protects filerAddressFunc and grpcDialOption from concurrent access
- Initialize() uses write lock when setting function
- SetFilerAddressFunc() uses write lock
- withFilerClient() uses read lock to get function and dial option
- GetPolicies() uses read lock to check if configured
2. **Improved Error Messages**:
- Prefix errors with "filer_etc:" for easier debugging
- "filer address not configured" → "filer_etc: filer address function not configured"
- "filer address is empty" → "filer_etc: filer address is empty"
3. **Clarified Comments**:
- auth_credentials.go: Clarify that initial setup is temporary
- Document that it's updated in s3api_server.go after FilerClient creation
- Remove ambiguity about when FilerClient.GetCurrentFiler is used
Benefits:
- Safe for concurrent credential operations
- Clear error messages for debugging
- Explicit documentation of initialization order
Remove deprecated wrapper functions and update all callers to use the
new function names directly.
Removed:
- genPartUploadUrl() → all callers now use genPartUploadPath()
- toFilerUrl() → all callers now use toFilerPath()
- SetFilerClient() → removed along with fallback code
Updated:
- s3api_object_handlers_multipart.go: uploadUrl → filePath
- s3api_object_handlers_put.go: uploadUrl → filePath, versionUploadUrl → versionFilePath
- s3api_object_versioning.go: toFilerUrl → toFilerPath
- s3api_object_handlers_test.go: toFilerUrl → toFilerPath
- auth_credentials.go: removed SetFilerClient fallback
- filer_etc_store.go: removed deprecated SetFilerClient method
Benefits:
- Cleaner codebase with no deprecated functions
- All variable names accurately reflect that they're paths, not URLs
- Single interface for credential stores (SetFilerAddressFunc only)
All code now consistently uses the new path-based approach.
Update FilerEtcStore to use a function that returns the current active
filer instead of a fixed address, enabling high availability.
Changes:
- Add SetFilerAddressFunc() method to FilerEtcStore
- Store uses filerAddressFunc instead of fixed filerGrpcAddress
- withFilerClient() calls the function to get current active filer
- Keep SetFilerClient() for backward compatibility (marked deprecated)
- Update S3ApiServer to pass FilerClient.GetCurrentFiler to store
Benefits:
- Credential store now uses currently active/healthy filer
- Automatic failover when filer becomes unavailable
- True HA for credential operations
- Backward compatible with old SetFilerClient interface
This addresses the credential store limitation - no longer pinned to
first filer, uses FilerClient's tracked current active filer.
Chris Lu