Rename max exemplars limit flag to ingester.max-exemplars. (cortexproject#5122)

Signed-off-by: sahnib <sahnib@amazon.com>
Signed-off-by: Alex Le <leqiyue@amazon.com>

Author: Bhuwan Sahni

docs/configuration/config-file-reference.md

@@ -2722,7 +2722,7 @@ The `limits_config` configures default and per-tenant limits imposed by Cortex s
 # Enables support for exemplars in TSDB and sets the maximum number that will be
 # stored. less than zero means disabled. If the value is set to zero, cortex
 # will fallback to blocks-storage.tsdb.max-exemplars value.
-# CLI flag: -block-storage.tsdb.max-exemplars
+# CLI flag: -ingester.max-exemplars
 [max_exemplars: <int> | default = 0]
 
 # The maximum number of series for which a query can fetch samples from each

pkg/util/validation/limits.go

@@ -149,7 +149,7 @@ func (l *Limits) RegisterFlags(f *flag.FlagSet) {
 	f.IntVar(&l.MaxLocalSeriesPerMetric, "ingester.max-series-per-metric", 50000, "The maximum number of active series per metric name, per ingester. 0 to disable.")
 	f.IntVar(&l.MaxGlobalSeriesPerUser, "ingester.max-global-series-per-user", 0, "The maximum number of active series per user, across the cluster before replication. 0 to disable. Supported only if -distributor.shard-by-all-labels is true.")
 	f.IntVar(&l.MaxGlobalSeriesPerMetric, "ingester.max-global-series-per-metric", 0, "The maximum number of active series per metric name, across the cluster before replication. 0 to disable.")
-	f.IntVar(&l.MaxExemplars, "block-storage.tsdb.max-exemplars", 0, "Enables support for exemplars in TSDB and sets the maximum number that will be stored. less than zero means disabled. If the value is set to zero, cortex will fallback to blocks-storage.tsdb.max-exemplars value.")
+	f.IntVar(&l.MaxExemplars, "ingester.max-exemplars", 0, "Enables support for exemplars in TSDB and sets the maximum number that will be stored. less than zero means disabled. If the value is set to zero, cortex will fallback to blocks-storage.tsdb.max-exemplars value.")
 
 	f.IntVar(&l.MaxLocalMetricsWithMetadataPerUser, "ingester.max-metadata-per-user", 8000, "The maximum number of active metrics with metadata per user, per ingester. 0 to disable.")
 	f.IntVar(&l.MaxLocalMetadataPerMetric, "ingester.max-metadata-per-metric", 10, "The maximum number of metadata per metric, per ingester. 0 to disable.")