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Fix S3 Gateway Read Failover #8076 (#8087)
Fix S3 Gateway Read Failover #8076 (#8087)
* fix s3 read failover #8076 - Implement cache invalidation in vidMapClient - Add retry logic in shared PrepareStreamContentWithThrottler - Update S3 Gateway to use FilerClient directly for invalidation support - Remove obsolete simpleMasterClient struct * improve observability for chunk re-lookup failures Added a warning log when volume location re-lookup fails after cache invalidation in PrepareStreamContentWithThrottler. * address code review feedback - Prevent infinite retry loops by comparing old/new URLs before retry - Update fileId2Url map after successful re-lookup for subsequent references - Add comprehensive test coverage for failover logic - Add tests for InvalidateCache method * Fix: prevent data duplication in stream retry and improve VidMap robustness * Cleanup: remove redundant check in InvalidateCachepull/8016/merge
Chris Lu
1 day ago
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7 changed files with 476 additions and 22 deletions
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12weed/filer/filechunk_manifest.go
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57weed/filer/stream.go
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175weed/filer/stream_failover_test.go
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19weed/s3api/s3api_object_handlers.go
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12weed/wdclient/vid_map.go
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16weed/wdclient/vidmap_client.go
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207weed/wdclient/vidmap_invalidation_test.go
@ -0,0 +1,175 @@ |
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package filer |
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import ( |
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"context" |
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"testing" |
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"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb" |
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"github.com/seaweedfs/seaweedfs/weed/wdclient" |
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) |
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|
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// mockMasterClient implements HasLookupFileIdFunction and CacheInvalidator
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type mockMasterClient struct { |
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lookupFunc func(ctx context.Context, fileId string) ([]string, error) |
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invalidatedFileIds []string |
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} |
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func (m *mockMasterClient) GetLookupFileIdFunction() wdclient.LookupFileIdFunctionType { |
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return m.lookupFunc |
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} |
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func (m *mockMasterClient) InvalidateCache(fileId string) { |
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m.invalidatedFileIds = append(m.invalidatedFileIds, fileId) |
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} |
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// Test urlSlicesEqual helper function
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func TestUrlSlicesEqual(t *testing.T) { |
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tests := []struct { |
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name string |
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a []string |
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b []string |
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expected bool |
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}{ |
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{ |
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name: "identical slices", |
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a: []string{"http://server1", "http://server2"}, |
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b: []string{"http://server1", "http://server2"}, |
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expected: true, |
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}, |
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{ |
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name: "same URLs different order", |
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a: []string{"http://server1", "http://server2"}, |
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b: []string{"http://server2", "http://server1"}, |
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expected: true, |
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}, |
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{ |
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name: "different URLs", |
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a: []string{"http://server1", "http://server2"}, |
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b: []string{"http://server1", "http://server3"}, |
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expected: false, |
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}, |
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{ |
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name: "different lengths", |
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a: []string{"http://server1"}, |
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b: []string{"http://server1", "http://server2"}, |
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expected: false, |
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}, |
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{ |
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name: "empty slices", |
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a: []string{}, |
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b: []string{}, |
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expected: true, |
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}, |
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{ |
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name: "duplicates in both", |
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a: []string{"http://server1", "http://server1"}, |
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b: []string{"http://server1", "http://server1"}, |
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expected: true, |
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}, |
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{ |
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name: "different duplicate counts", |
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a: []string{"http://server1", "http://server1"}, |
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b: []string{"http://server1", "http://server2"}, |
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expected: false, |
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}, |
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} |
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for _, tt := range tests { |
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t.Run(tt.name, func(t *testing.T) { |
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result := urlSlicesEqual(tt.a, tt.b) |
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if result != tt.expected { |
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t.Errorf("urlSlicesEqual(%v, %v) = %v; want %v", tt.a, tt.b, result, tt.expected) |
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} |
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}) |
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} |
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} |
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// Test cache invalidation when read fails
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func TestStreamContentWithCacheInvalidation(t *testing.T) { |
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ctx := context.Background() |
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fileId := "3,01234567890" |
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callCount := 0 |
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oldUrls := []string{"http://failed-server:8080"} |
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newUrls := []string{"http://working-server:8080"} |
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mock := &mockMasterClient{ |
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lookupFunc: func(ctx context.Context, fid string) ([]string, error) { |
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callCount++ |
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if callCount == 1 { |
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// First call returns failing server
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return oldUrls, nil |
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} |
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// After invalidation, return working server
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return newUrls, nil |
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}, |
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} |
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// Create a simple chunk
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chunks := []*filer_pb.FileChunk{ |
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{ |
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FileId: fileId, |
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Offset: 0, |
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Size: 10, |
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}, |
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} |
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streamFn, err := PrepareStreamContentWithThrottler(ctx, mock, noJwtFunc, chunks, 0, 10, 0) |
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if err != nil { |
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t.Fatalf("PrepareStreamContentWithThrottler failed: %v", err) |
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} |
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// Note: This test can't fully execute streamFn because it would require actual HTTP servers
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// However, we can verify the setup was created correctly
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if streamFn == nil { |
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t.Fatal("Expected non-nil stream function") |
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} |
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// Verify the lookup was called
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if callCount != 1 { |
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t.Errorf("Expected 1 lookup call, got %d", callCount) |
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} |
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} |
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// Test that InvalidateCache is called on read failure
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func TestCacheInvalidationInterface(t *testing.T) { |
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mock := &mockMasterClient{ |
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lookupFunc: func(ctx context.Context, fileId string) ([]string, error) { |
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return []string{"http://server:8080"}, nil |
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}, |
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} |
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fileId := "3,test123" |
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// Simulate invalidation
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if invalidator, ok := interface{}(mock).(CacheInvalidator); ok { |
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invalidator.InvalidateCache(fileId) |
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} else { |
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t.Fatal("mockMasterClient should implement CacheInvalidator") |
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} |
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// Check that the file ID was recorded as invalidated
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if len(mock.invalidatedFileIds) != 1 { |
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t.Fatalf("Expected 1 invalidated file ID, got %d", len(mock.invalidatedFileIds)) |
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} |
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if mock.invalidatedFileIds[0] != fileId { |
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t.Errorf("Expected invalidated file ID %s, got %s", fileId, mock.invalidatedFileIds[0]) |
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} |
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} |
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// Test retry logic doesn't retry with same URLs
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func TestRetryLogicSkipsSameUrls(t *testing.T) { |
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// This test verifies that the urlSlicesEqual check prevents infinite retries
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sameUrls := []string{"http://server1:8080", "http://server2:8080"} |
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differentUrls := []string{"http://server3:8080", "http://server4:8080"} |
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// Same URLs should return true (and thus skip retry)
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if !urlSlicesEqual(sameUrls, sameUrls) { |
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t.Error("Expected same URLs to be equal") |
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} |
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// Different URLs should return false (and thus allow retry)
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if urlSlicesEqual(sameUrls, differentUrls) { |
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t.Error("Expected different URLs to not be equal") |
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} |
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} |
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@ -0,0 +1,207 @@ |
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package wdclient |
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import ( |
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"testing" |
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) |
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// TestInvalidateCacheValidFileId tests cache invalidation with a valid file ID
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func TestInvalidateCacheValidFileId(t *testing.T) { |
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// Create a simple vidMapClient (can use nil provider for this test)
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vc := &vidMapClient{ |
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vidMap: newVidMap(""), |
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vidMapCacheSize: 5, |
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} |
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// Add some locations to the cache
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vid := uint32(456) |
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vc.vidMap.Lock() |
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vc.vidMap.vid2Locations[vid] = []Location{{Url: "http://server1:8080"}} |
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vc.vidMap.Unlock() |
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// Verify location exists
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vc.vidMap.RLock() |
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_, found := vc.vidMap.vid2Locations[vid] |
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vc.vidMap.RUnlock() |
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if !found { |
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t.Fatal("Location should exist before invalidation") |
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} |
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// Call InvalidateCache with a properly formatted file ID
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fileId := "456,abcdef123456" |
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vc.InvalidateCache(fileId) |
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// Verify the locations were removed
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vc.vidMap.RLock() |
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_, foundAfter := vc.vidMap.vid2Locations[vid] |
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vc.vidMap.RUnlock() |
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if foundAfter { |
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t.Errorf("Expected locations for vid %d to be removed after InvalidateCache", vid) |
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} |
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} |
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// TestInvalidateCacheInvalidFileId tests cache invalidation with invalid file IDs
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func TestInvalidateCacheInvalidFileId(t *testing.T) { |
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testCases := []struct { |
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name string |
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fileId string |
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}{ |
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{"empty file ID", ""}, |
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{"no comma separator", "12345"}, |
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{"non-numeric vid", "abc,defg"}, |
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{"negative vid", "-1,abcd"}, |
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{"oversized vid", "999999999999999999999,abcd"}, |
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} |
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for _, tc := range testCases { |
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t.Run(tc.name, func(t *testing.T) { |
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vc := &vidMapClient{ |
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vidMap: newVidMap(""), |
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vidMapCacheSize: 5, |
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} |
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// Add a location to ensure the cache isn't empty
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vc.vidMap.Lock() |
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vc.vidMap.vid2Locations[1] = []Location{{Url: "http://server:8080"}} |
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vc.vidMap.Unlock() |
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// This should not panic or cause errors
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vc.InvalidateCache(tc.fileId) |
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// Verify the existing location is still there (not affected)
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vc.vidMap.RLock() |
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_, found := vc.vidMap.vid2Locations[1] |
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vc.vidMap.RUnlock() |
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if !found { |
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t.Errorf("InvalidateCache with invalid fileId '%s' should not affect other entries", tc.fileId) |
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} |
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}) |
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} |
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} |
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// TestInvalidateCacheWithHistory tests that invalidation propagates through cache history
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func TestInvalidateCacheWithHistory(t *testing.T) { |
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vid := uint32(789) |
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// Create first vidMap with the volume
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vm1 := newVidMap("") |
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vm1.Lock() |
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vm1.vid2Locations[vid] = []Location{{Url: "http://server1:8080"}} |
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vm1.Unlock() |
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// Create second vidMap with the cached first one
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vm2 := newVidMap("") |
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vm2.cache.Store(vm1) // vm1 becomes the cache/history
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vm2.Lock() |
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vm2.vid2Locations[vid] = []Location{{Url: "http://server2:8080"}} |
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vm2.Unlock() |
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// Create vidMapClient with vm2 as current
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vc := &vidMapClient{ |
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vidMap: vm2, |
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vidMapCacheSize: 5, |
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} |
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// Verify both have the vid before invalidation
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vm2.RLock() |
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_, foundInCurrent := vm2.vid2Locations[vid] |
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vm2.RUnlock() |
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vm1.RLock() |
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_, foundInCache := vm1.vid2Locations[vid] |
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vm1.RUnlock() |
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if !foundInCurrent || !foundInCache { |
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t.Fatal("Both maps should have the vid before invalidation") |
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} |
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// Invalidate the cache
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fileId := "789,xyz123" |
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vc.InvalidateCache(fileId) |
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// Check that current map doesn't have the vid
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vm2.RLock() |
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_, foundInCurrentAfter := vm2.vid2Locations[vid] |
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vm2.RUnlock() |
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if foundInCurrentAfter { |
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t.Error("Expected vid to be removed from current vidMap after InvalidateCache") |
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} |
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// Check that cache doesn't have the vid either (recursive deletion)
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vm1.RLock() |
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_, foundInCacheAfter := vm1.vid2Locations[vid] |
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vm1.RUnlock() |
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if foundInCacheAfter { |
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t.Error("Expected vid to be removed from cached vidMap as well (recursive deletion)") |
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} |
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} |
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// TestDeleteVidRecursion tests the deleteVid method removes from history chain
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func TestDeleteVidRecursion(t *testing.T) { |
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vid := uint32(999) |
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// Create a chain: vm3 -> vm2 -> vm1
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vm1 := newVidMap("") |
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vm1.Lock() |
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vm1.vid2Locations[vid] = []Location{{Url: "http://server1:8080"}} |
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vm1.Unlock() |
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vm2 := newVidMap("") |
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vm2.cache.Store(vm1) |
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vm2.Lock() |
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vm2.vid2Locations[vid] = []Location{{Url: "http://server2:8080"}} |
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vm2.Unlock() |
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vm3 := newVidMap("") |
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vm3.cache.Store(vm2) |
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vm3.Lock() |
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vm3.vid2Locations[vid] = []Location{{Url: "http://server3:8080"}} |
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vm3.Unlock() |
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// Verify all have the vid
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vm3.RLock() |
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_, found3 := vm3.vid2Locations[vid] |
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vm3.RUnlock() |
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vm2.RLock() |
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_, found2 := vm2.vid2Locations[vid] |
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vm2.RUnlock() |
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vm1.RLock() |
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_, found1 := vm1.vid2Locations[vid] |
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vm1.RUnlock() |
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if !found1 || !found2 || !found3 { |
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t.Fatal("All maps should have the vid before deletion") |
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} |
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// Delete from vm3 (should cascade)
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vm3.deleteVid(vid) |
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// Verify it's gone from all
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vm3.RLock() |
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_, found3After := vm3.vid2Locations[vid] |
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vm3.RUnlock() |
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vm2.RLock() |
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_, found2After := vm2.vid2Locations[vid] |
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vm2.RUnlock() |
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vm1.RLock() |
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_, found1After := vm1.vid2Locations[vid] |
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vm1.RUnlock() |
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if found3After { |
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t.Error("Expected vid to be removed from vm3") |
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} |
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if found2After { |
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t.Error("Expected vid to be removed from vm2 (cascaded)") |
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} |
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if found1After { |
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t.Error("Expected vid to be removed from vm1 (cascaded)") |
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} |
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} |
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