Remove UseEtcdWrapper feature gate (#999)

docs/concepts/etcd-cluster-components.md

@@ -8,21 +8,21 @@ For every `Etcd` cluster that is provisioned by `etcd-druid` it deploys a set of
 
 * Replicas for the StatefulSet are derived from `Etcd.Spec.Replicas` in the custom resource.
 
-* Each pod comprises of two containers:
+* Each pod comprises two containers:
   * `etcd-wrapper` : This is the main container which runs an etcd process.
 
   * `etcd-backup-restore` : This is a side-container which does the following:
 
     * Orchestrates the initialization of etcd. This includes validation of any existing etcd data directory, restoration in case of corrupt etcd data directory files for a single-member etcd cluster.
-    * Periodically renewes member lease.
-    * Optionally takes schedule and thresold based delta and full snapshots and pushes them to a configured object store.
+    * Periodically renews member lease.
+    * Optionally takes schedule and threshold based delta and full snapshots and pushes them to a configured object store.
     * Orchestrates scheduled etcd-db defragmentation.
 
     > NOTE: This is not a complete list of functionalities offered out of `etcd-backup-restore`. 
 
 **Code reference:** [StatefulSet-Component](https://github.com/gardener/etcd-druid/tree/480213808813c5282b19aff5f3fd6868529e779c/internal/component/statefulset)
 
-> For detailed information on each container you can visit [etcd-wrapper](https://github.com/gardener/etcd-wrapper) and [etcd-backup-restore](https://github.com/gardener/etcd-backup-restore) respositories.
+> For detailed information on each container you can visit [etcd-wrapper](https://github.com/gardener/etcd-wrapper) and [etcd-backup-restore](https://github.com/gardener/etcd-backup-restore) repositories.
 
 ## ConfigMap
 

docs/deployment/feature-gates.md

@@ -25,11 +25,12 @@ The following tables are a summary of the feature gates that you can set on etcd
 
 ## Feature Gates for Graduated or Deprecated Features
 
-| Feature          | Default | Stage   | Since  | Until  |
-|------------------|---------|---------|--------|--------|
-| `UseEtcdWrapper` | `false` | `Alpha` | `0.19` | `0.21` |
-| `UseEtcdWrapper` | `true`  | `Beta`  | `0.22` | `0.24` |
-| `UseEtcdWrapper` | `true`  | `GA`    | `0.25` |        |
+| Feature          | Default | Stage     | Since  | Until  |
+|------------------|---------|-----------|--------|--------|
+| `UseEtcdWrapper` | `false` | `Alpha`   | `0.19` | `0.21` |
+| `UseEtcdWrapper` | `true`  | `Beta`    | `0.22` | `0.24` |
+| `UseEtcdWrapper` | `true`  | `GA`      | `0.25` | `0.27` |
+| `UseEtcdWrapper` |         | `Removed` | `0.28` |        |
 
 ## Using a Feature
 

docs/deployment/version-compatibility-matrix.md

@@ -7,15 +7,15 @@
 We strongly recommend using `etcd-druid` with the supported kubernetes versions, published in this document.
 The following is a list of kubernetes versions supported by the respective `etcd-druid` versions.
 
-| etcd-druid version | Kubernetes version |
-|------|------|
-| >=v0.20 | >=v1.21 |
-| >=v0.14 && <0.20 | All versions supported |
-| <v0.14 | < v1.25 |
+| etcd-druid version | Kubernetes version     |
+|--------------------|------------------------|
+| >=v0.20            | >=v1.21                |
+| >=v0.14 && <0.20   | All versions supported |
+| <v0.14             | < v1.25                |
 
 ## etcd-backup-restore & etcd-wrapper
 
 | etcd-druid version | etcd-backup-restore version | etcd-wrapper version |
-| ------------------ | --------------------------- | -------------------- |
+|--------------------|-----------------------------|----------------------|
 | >=v0.23.1          | >=v0.30.2                   | >=v0.2.0             |
 

internal/component/statefulset/builder.go

@@ -468,7 +468,6 @@ func (b *stsBuilder) getBackupRestoreContainerCommandArgs() []string {
 	commandArgs = append(commandArgs, fmt.Sprintf("--snapstore-temp-directory=%s/temp", common.VolumeMountPathEtcdData))
 	commandArgs = append(commandArgs, fmt.Sprintf("--etcd-connection-timeout=%s", defaultEtcdConnectionTimeout))
 	commandArgs = append(commandArgs, "--enable-member-lease-renewal=true")
-	// Enable/Disable use Etcd Wrapper in BackupRestore container. Once `use-etcd-wrapper` feature-gate is GA then this value will always be true.
 	commandArgs = append(commandArgs, "--use-etcd-wrapper=true")
 
 	var quota = defaultQuota

internal/features/features.go

@@ -9,28 +9,15 @@ import (
 )
 
 const (
-	// Every feature should add method here following this template:
-	//
-	// // MyFeature enables Foo.
-	// // owner: @username
-	// // alpha: v0.X
-	// MyFeature featuregate.Feature = "MyFeature"
-
-	// UseEtcdWrapper enables the use of etcd-wrapper image and a compatible version
-	// of etcd-backup-restore, along with component-specific configuration
-	// changes required for the usage of the etcd-wrapper image.
-	// owner @unmarshall @aaronfern
-	// alpha: v0.19
-	// beta:  v0.22
-	// GA:    v0.25
-	UseEtcdWrapper featuregate.Feature = "UseEtcdWrapper"
+// Every feature should add method here following this template:
+//
+// // MyFeature enables Foo.
+// // owner: @username
+// // alpha: v0.X
+// MyFeature featuregate.Feature = "MyFeature"
 )
 
-var defaultFeatures = map[featuregate.Feature]featuregate.FeatureSpec{
-	UseEtcdWrapper: {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
-}
-
 // GetDefaultFeatures returns the default feature gates known to etcd-druid.
 func GetDefaultFeatures() map[featuregate.Feature]featuregate.FeatureSpec {
-	return defaultFeatures
+	return nil
 }