Introduced options to ignore old indexes based on build time and build version. (#111168)

pkg/setting/setting.go

@@ -579,6 +579,8 @@ type Cfg struct {
 	IndexMinCount                              int
 	IndexRebuildInterval                       time.Duration
 	IndexCacheTTL                              time.Duration
+	MaxFileIndexAge                            time.Duration // Max age of file-based indexes. Index older than this will not be reused between restarts.
+	MinFileIndexBuildVersion                   string        // Minimum version of Grafana that built the file-based index. If index was built with older Grafana, it will not be reused between restarts.
 	EnableSharding                             bool
 	QOSEnabled                                 bool
 	QOSNumberWorker                            int

pkg/setting/setting_unified_storage.go

@@ -76,4 +76,7 @@ func (cfg *Cfg) setUnifiedStorageConfig() {
 	cfg.SprinklesApiServerPageLimit = section.Key("sprinkles_api_server_page_limit").MustInt(10000)
 	cfg.CACertPath = section.Key("ca_cert_path").String()
 	cfg.HttpsSkipVerify = section.Key("https_skip_verify").MustBool(false)
+
+	cfg.MaxFileIndexAge = section.Key("max_file_index_age").MustDuration(0)
+	cfg.MinFileIndexBuildVersion = section.Key("min_file_index_build_version").MustString("")
 }