[etcd-druid]

✨ New Features

[OPERATOR] A Helm chart for deploying Etcd-Druid is now available in charts/druid. (gardener/etcd-druid#296, @timuthy)
[DEVELOPER] Developers can now run Druid e2e tests via make test-e2e. Please see docs/development/local-e2e-tests.md for detailed information. (gardener/etcd-druid#296, @timuthy)

[USER] Fix statefulset volumeClaimTemplate StorageClassName value population if etcd storageClass is an empty string. (gardener/etcd-druid#400, @shreyas-s-rao)
[OPERATOR] An issue has been fixed that caused Etcd-Druid to update immutable fields sts.spec.serviceName and sts.spec.podManagementPolicy for older etcd resources that had different values configured. These updates must only happen when a etcd cluster is scaled up for the first time (1 -> x) because (a) then these values are mandatory and (b) a disruption is accepted. (gardener/etcd-druid#408, @timuthy)
[OPERATOR] An issue has been fixed that caused Etcd-Druid to not consider the hostPath configuration in the referenced backup secret etcd.spec.backup.store.secretRef. (gardener/etcd-druid#412, @timuthy)

[OPERATOR] Liveness and startup probes for etcd were removed. After activating them in the last release, we noticed that they cause more harm than good since the startup time for etcd clusters varies and isn't predicable. Killing the etcd container in such a case doesn't solve the situation and will rather end in an endless loop of restarts. This change will cause a restart of etcd clusters. (gardener/etcd-druid#423, @timuthy)
[OPERATOR] The Golang version used to compile Etcd-Druid has been updated to go 1.18.5. (gardener/etcd-druid#410, @timuthy)
[OPERATOR] Adds a document mentioning the metrics for multi-node etcd. (gardener/etcd-druid#414, @ishan16696)

[OPERATOR] Fix the probeEtcd func() to probe the corresponding Etcd by getting its Endpoint Status rather than just Get a key. (gardener/etcd-backup-restore#523, @ishan16696)

[OPERATOR] Handles the bolt database panic in case of database found to be corrupt. (gardener/etcd-backup-restore#521, @ishan16696)
[OPERATOR] Added new metrics for multi-node etcd: etcdbr_defragmentation_duration_seconds, etcdbr_restoration_duration_seconds , etcdbr_cluster_size , etcdbr_is_learner , etcdbr_is_learner_count_total , etcdbr_add_learner_duration_seconds , etcdbr_member_remove_duration_seconds , etcdbr_member_promote_duration_seconds . (gardener/etcd-backup-restore#522, @ishan16696)
[OPERATOR] Adds an annotation to etcd lease which indicates if the peer url is TLS enabled. (gardener/etcd-backup-restore#530, @unmarshall)

[OPERATOR] Base alpine image upgraded from 3.15.4 to 3.15.6 (gardener/etcd-backup-restore#520, @aaronfern)

[OPERATOR] Base alpine image upgraded from 3.15.4 to 3.15.6. (gardener/etcd-custom-image#24, @aaronfern)