Deprecate 'querier.ingester-metadata-streaming' flag (#6147)

* Deprecate 'querier.ingester-metadata-streaming' flag

Signed-off-by: alanprot <alanprot@gmail.com>

* Changelog

Signed-off-by: alanprot <alanprot@gmail.com>

---------

Signed-off-by: alanprot <alanprot@gmail.com>

Author: alanprot

CHANGELOG.md

@@ -6,6 +6,7 @@
 * [CHANGE] Server: Instrument `cortex_request_duration_seconds` metric with native histogram. If `native-histograms` feature is enabled in monitoring Prometheus then the metric name needs to be updated in your dashboards. #6056
 * [CHANGE] Distributor/Ingester: Change `cortex_distributor_ingester_appends_total`, `cortex_distributor_ingester_append_failures_total`, `cortex_distributor_ingester_queries_total`, and `cortex_distributor_ingester_query_failures_total` metrics to use the ingester ID instead of its IP as the label value. #6078
 * [CHANGE] OTLP: Set `AddMetricSuffixes` to true to always enable metric name normalization. #6136
+* [CHANGE] Querier: Deprecate and enable by default `querier.ingester-metadata-streaming` flag. #6147
 * [FEATURE] Ingester/Distributor: Experimental: Enable native histogram ingestion via `-blocks-storage.tsdb.enable-native-histograms` flag. #5986 #6010 #6020
 * [FEATURE] Querier: Enable querying native histogram chunks. #5944 #6031
 * [FEATURE] Query Frontend: Support native histogram in query frontend response. #5996 #6043

docs/blocks-storage/querier.md

@@ -104,9 +104,10 @@ querier:
   # CLI flag: -querier.timeout
   [timeout: <duration> | default = 2m]
 
-  # Use streaming RPCs for metadata APIs from ingester.
+  # Deprecated (This feature will be always on after v1.18): Use streaming RPCs
+  # for metadata APIs from ingester.
   # CLI flag: -querier.ingester-metadata-streaming
-  [ingester_metadata_streaming: <boolean> | default = false]
+  [ingester_metadata_streaming: <boolean> | default = true]
 
   # Maximum number of samples a single query can load into memory.
   # CLI flag: -querier.max-samples

docs/configuration/config-file-reference.md

@@ -3698,9 +3698,10 @@ The `querier_config` configures the Cortex querier.
 # CLI flag: -querier.timeout
 [timeout: <duration> | default = 2m]
 
-# Use streaming RPCs for metadata APIs from ingester.
+# Deprecated (This feature will be always on after v1.18): Use streaming RPCs
+# for metadata APIs from ingester.
 # CLI flag: -querier.ingester-metadata-streaming
-[ingester_metadata_streaming: <boolean> | default = false]
+[ingester_metadata_streaming: <boolean> | default = true]
 
 # Maximum number of samples a single query can load into memory.
 # CLI flag: -querier.max-samples

pkg/querier/querier.go

@@ -108,7 +108,7 @@ func (cfg *Config) RegisterFlags(f *flag.FlagSet) {
 	cfg.StoreGatewayClient.RegisterFlagsWithPrefix("querier.store-gateway-client", f)
 	f.IntVar(&cfg.MaxConcurrent, "querier.max-concurrent", 20, "The maximum number of concurrent queries.")
 	f.DurationVar(&cfg.Timeout, "querier.timeout", 2*time.Minute, "The timeout for a query.")
-	f.BoolVar(&cfg.IngesterMetadataStreaming, "querier.ingester-metadata-streaming", false, "Use streaming RPCs for metadata APIs from ingester.")
+	f.BoolVar(&cfg.IngesterMetadataStreaming, "querier.ingester-metadata-streaming", true, "Deprecated (This feature will be always on after v1.18): Use streaming RPCs for metadata APIs from ingester.")
 	f.IntVar(&cfg.MaxSamples, "querier.max-samples", 50e6, "Maximum number of samples a single query can load into memory.")
 	f.DurationVar(&cfg.QueryIngestersWithin, "querier.query-ingesters-within", 0, "Maximum lookback beyond which queries are not sent to ingester. 0 means all queries are sent to ingester.")
 	f.BoolVar(&cfg.EnablePerStepStats, "querier.per-step-stats-enabled", false, "Enable returning samples stats per steps in query response.")