Remove experimental tag on WAL

CHANGELOG.md

@@ -48,6 +48,7 @@
 * [ENHANCEMENT] query-frontend now also logs the POST data of long queries. #2481
 * [ENHANCEMENT] Experimental WAL: Ingester WAL records now have type header and the custom WAL records have been replaced by Prometheus TSDB's WAL records. Old records will not be supported from 1.3 onwards. Note: once this is deployed, you cannot downgrade without data loss. #2436
 * [ENHANCEMENT] Redis Cache: Added `idle_timeout`, `wait_on_pool_exhaustion` and `max_conn_lifetime` options to redis cache configuration. #2550
+* [ENHANCEMENT] WAL: the experimental tag has been removed on the WAL in ingesters.
 * [BUGFIX] Ruler: Ensure temporary rule files with special characters are properly mapped and cleaned up. #2506
 * [BUGFIX] Fixes #2411, Ensure requests are properly routed to the prometheus api embedded in the query if `-server.path-prefix` is set. #2372
 * [BUGFIX] Experimental TSDB: fixed chunk data corruption when querying back series using the experimental blocks storage. #2400

docs/architecture.md

@@ -180,7 +180,7 @@ The **write-ahead log** (WAL) is used to write to a persistent local disk all in
 
 Contrary to the sole replication and given the persistent local disk data is not lost, in the event of multiple ingesters failure each ingester will recover the in-memory series samples from WAL upon subsequent restart. The replication is still recommended in order to ensure no temporary failures on the read path in the event of a single ingester failure.
 
-The WAL for the chunks storage is an experimental feature (disabled by default), while it's always enabled for the blocks storage.
+The WAL for the chunks storage is disabled by default, while it's always enabled for the blocks storage.
 
 #### Ingesters write de-amplification
 

docs/configuration/v1-guarantees.md

@@ -35,7 +35,6 @@ Cortex is an actively developed project and we want to encourage the introductio
 Currently experimental features are:
 
 - TSDB block storage.
-- Ingester chunk WAL.
 - Cassandra storage engine.
 - Azure blob storage.
 - Zone awareness based replication.

docs/production/ingesters-with-wal.md

@@ -9,8 +9,6 @@ Currently the ingesters running in the chunks storage mode, store all their data
 
 To use WAL, there are some changes that needs to be made in the deployment.
 
-_The WAL is currently considered experimental._
-
 ## Changes to deployment
 
 1. Since ingesters need to have the same persistent volume across restarts/rollout, all the ingesters should be run on [statefulset](https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/) with fixed volumes.

pkg/ingester/wal.go

@@ -110,8 +110,6 @@ func newWAL(cfg WALConfig, userStatesFunc func() map[string]*userState, register
 		return &noopWAL{}, nil
 	}
 
-	util.WarnExperimentalUse("Chunks WAL")
-
 	var walRegistry prometheus.Registerer
 	if registerer != nil {
 		walRegistry = prometheus.WrapRegistererWith(prometheus.Labels{"kind": "wal"}, registerer)