detached c357053

fix(config): sync external_routes and network_groups to viper before Save to prevent dotted-key corruption

commit
c3570537b20063616101a6ea43be359e4c36fccf
author
bnema · · 2026-02-24 21:51 UTC
parent
d7ba6d9
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2 files · +60 -2
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M internal/usecase/config/service.go +6 -1
@@ -418,9 +418,14 @@ func (s *Service) Save(ctx context.Context) error {
418418 s.mu.Lock()
419419 defer s.mu.Unlock()
420420
421- // Update viper with current config
421+ // Sync ALL mutable config sections back to Viper before writing.
422+ // Using explicit Set() ensures the values are stored as proper flat maps,
423+ // preventing viper from splitting dotted keys (e.g. "reg.example.com") into
424+ // nested TOML subtrees which corrupts the data on re-read.
422425 s.viper.Set("routes", s.config.Routes)
426+ s.viper.Set("external_routes", s.config.ExternalRoutes)
423427 s.viper.Set("attachments", s.config.Attachments)
428+ s.viper.Set("network_groups", s.config.NetworkGroups)
424429
425430 // Record save time to debounce file watcher events
426431 atomic.StoreInt64(&s.lastSaveTime, time.Now().UnixNano())
@@ -418,9 +418,14 @@ func (s *Service) Save(ctx context.Context) error {
418 s.mu.Lock()418 s.mu.Lock()
419 defer s.mu.Unlock()419 defer s.mu.Unlock()
420 420
421- // Update viper with current config421+ // Sync ALL mutable config sections back to Viper before writing.
422+ // Using explicit Set() ensures the values are stored as proper flat maps,
423+ // preventing viper from splitting dotted keys (e.g. "reg.example.com") into
424+ // nested TOML subtrees which corrupts the data on re-read.
422 s.viper.Set("routes", s.config.Routes)425 s.viper.Set("routes", s.config.Routes)
426+ s.viper.Set("external_routes", s.config.ExternalRoutes)
423 s.viper.Set("attachments", s.config.Attachments)427 s.viper.Set("attachments", s.config.Attachments)
428+ s.viper.Set("network_groups", s.config.NetworkGroups)
424 429
425 // Record save time to debounce file watcher events430 // Record save time to debounce file watcher events
426 atomic.StoreInt64(&s.lastSaveTime, time.Now().UnixNano())431 atomic.StoreInt64(&s.lastSaveTime, time.Now().UnixNano())
M internal/usecase/config/service_test.go +54 -1
@@ -1135,7 +1135,7 @@ frontend = ["app1.example.com", "app2.example.com"]
11351135 err = v2.ReadInConfig()
11361136 require.NoError(t, err)
11371137
1138- // Verify network_groups is still in the file after save
1138+ // Verify network_groups is still intact and correct after save
11391139 savedGroups := loadStringArrayMap(v2.Get("network_groups"))
11401140 assert.Len(t, savedGroups, 1, "network_groups should still be present in saved config")
11411141 assert.ElementsMatch(t, []string{"app1.example.com", "app2.example.com"}, savedGroups["frontend"])
@@ -1148,6 +1148,59 @@ frontend = ["app1.example.com", "app2.example.com"]
11481148 assert.Equal(t, 9999, v2.GetInt("server.port"))
11491149 })
11501150
1151+ // Regression test: external_routes keys contain dots (e.g. "reg.example.com").
1152+ // Without explicitly calling viper.Set("external_routes", ...) before WriteConfig,
1153+ // viper splits dotted keys into nested subtrees, corrupting the data on re-read.
1154+ t.Run("external_routes with dotted domain keys are not corrupted on Save", func(t *testing.T) {
1155+ tmpDir := t.TempDir()
1156+ configFile := filepath.Join(tmpDir, "gordon.toml")
1157+ initialConfig := `
1158+[server]
1159+port = 8080
1160+
1161+[routes]
1162+"app.example.com" = "myapp:latest"
1163+
1164+[external_routes]
1165+"reg.example.com" = "localhost:5000"
1166+`
1167+ err := os.WriteFile(configFile, []byte(initialConfig), 0600)
1168+ require.NoError(t, err)
1169+
1170+ v := viper.New()
1171+ v.SetConfigFile(configFile)
1172+ err = v.ReadInConfig()
1173+ require.NoError(t, err)
1174+
1175+ eventBus := mocks.NewMockEventPublisher(t)
1176+ svc := NewService(v, eventBus)
1177+ ctx := testContext()
1178+
1179+ err = svc.Load(ctx)
1180+ require.NoError(t, err)
1181+
1182+ // Verify external_routes loaded correctly in memory
1183+ extRoutes := svc.GetExternalRoutes()
1184+ require.Equal(t, "localhost:5000", extRoutes["reg.example.com"])
1185+
1186+ // Trigger Save
1187+ err = svc.AddRoute(ctx, domain.Route{Domain: "new.example.com", Image: "newapp:latest"})
1188+ require.NoError(t, err)
1189+
1190+ // Re-read the file with a fresh viper instance
1191+ v2 := viper.New()
1192+ v2.SetConfigFile(configFile)
1193+ err = v2.ReadInConfig()
1194+ require.NoError(t, err)
1195+
1196+ // external_routes must survive Save with correct flat map structure.
1197+ // Without the fix, viper splits "reg.example.com" into nested TOML subtrees
1198+ // and GetString("external_routes.reg\\.example\\.com") returns empty string.
1199+ savedExtRoutes := loadStringMap(v2.Get("external_routes"))
1200+ assert.Equal(t, "localhost:5000", savedExtRoutes["reg.example.com"],
1201+ "external_routes must not be corrupted by viper's dot-path splitting on WriteConfig")
1202+ })
1203+
11511204 t.Run("network_groups added in memory are written to disk on Save", func(t *testing.T) {
11521205 // Setup: config file WITHOUT network_groups
11531206 tmpDir := t.TempDir()
@@ -1135,7 +1135,7 @@ frontend = ["app1.example.com", "app2.example.com"]
1135 err = v2.ReadInConfig()1135 err = v2.ReadInConfig()
1136 require.NoError(t, err)1136 require.NoError(t, err)
1137 1137
1138- // Verify network_groups is still in the file after save1138+ // Verify network_groups is still intact and correct after save
1139 savedGroups := loadStringArrayMap(v2.Get("network_groups"))1139 savedGroups := loadStringArrayMap(v2.Get("network_groups"))
1140 assert.Len(t, savedGroups, 1, "network_groups should still be present in saved config")1140 assert.Len(t, savedGroups, 1, "network_groups should still be present in saved config")
1141 assert.ElementsMatch(t, []string{"app1.example.com", "app2.example.com"}, savedGroups["frontend"])1141 assert.ElementsMatch(t, []string{"app1.example.com", "app2.example.com"}, savedGroups["frontend"])
@@ -1148,6 +1148,59 @@ frontend = ["app1.example.com", "app2.example.com"]
1148 assert.Equal(t, 9999, v2.GetInt("server.port"))1148 assert.Equal(t, 9999, v2.GetInt("server.port"))
1149 })1149 })
1150 1150
1151+ // Regression test: external_routes keys contain dots (e.g. "reg.example.com").
1152+ // Without explicitly calling viper.Set("external_routes", ...) before WriteConfig,
1153+ // viper splits dotted keys into nested subtrees, corrupting the data on re-read.
1154+ t.Run("external_routes with dotted domain keys are not corrupted on Save", func(t *testing.T) {
1155+ tmpDir := t.TempDir()
1156+ configFile := filepath.Join(tmpDir, "gordon.toml")
1157+ initialConfig := `
1158+[server]
1159+port = 8080
1160+
1161+[routes]
1162+"app.example.com" = "myapp:latest"
1163+
1164+[external_routes]
1165+"reg.example.com" = "localhost:5000"
1166+`
1167+ err := os.WriteFile(configFile, []byte(initialConfig), 0600)
1168+ require.NoError(t, err)
1169+
1170+ v := viper.New()
1171+ v.SetConfigFile(configFile)
1172+ err = v.ReadInConfig()
1173+ require.NoError(t, err)
1174+
1175+ eventBus := mocks.NewMockEventPublisher(t)
1176+ svc := NewService(v, eventBus)
1177+ ctx := testContext()
1178+
1179+ err = svc.Load(ctx)
1180+ require.NoError(t, err)
1181+
1182+ // Verify external_routes loaded correctly in memory
1183+ extRoutes := svc.GetExternalRoutes()
1184+ require.Equal(t, "localhost:5000", extRoutes["reg.example.com"])
1185+
1186+ // Trigger Save
1187+ err = svc.AddRoute(ctx, domain.Route{Domain: "new.example.com", Image: "newapp:latest"})
1188+ require.NoError(t, err)
1189+
1190+ // Re-read the file with a fresh viper instance
1191+ v2 := viper.New()
1192+ v2.SetConfigFile(configFile)
1193+ err = v2.ReadInConfig()
1194+ require.NoError(t, err)
1195+
1196+ // external_routes must survive Save with correct flat map structure.
1197+ // Without the fix, viper splits "reg.example.com" into nested TOML subtrees
1198+ // and GetString("external_routes.reg\\.example\\.com") returns empty string.
1199+ savedExtRoutes := loadStringMap(v2.Get("external_routes"))
1200+ assert.Equal(t, "localhost:5000", savedExtRoutes["reg.example.com"],
1201+ "external_routes must not be corrupted by viper's dot-path splitting on WriteConfig")
1202+ })
1203+
1151 t.Run("network_groups added in memory are written to disk on Save", func(t *testing.T) {1204 t.Run("network_groups added in memory are written to disk on Save", func(t *testing.T) {
1152 // Setup: config file WITHOUT network_groups1205 // Setup: config file WITHOUT network_groups
1153 tmpDir := t.TempDir()1206 tmpDir := t.TempDir()

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