[etcd-druid]

⚠️ Breaking Changes

[OPERATOR] CronJob is no more used to schedule compaction job at regular interval. Instead, we are using Job. (gardener/etcd-druid#235, @abdasgupta)
- Therefore, BackupCompactionSchedule field is removed from ETCD backup spec, as it was only necessary for scheduling CronJob.
[DEVELOPER] The sub-module github.com/gardener/etcd-druid/api has been removed. Please use github.com/gardener/etcd-druid instead if your module(s) depend on etcd-druid. (gardener/etcd-druid#244, @timuthy)

[USER] druid will now also reconcile a serviceaccount, a role, and a rolebinding as part of it's etcd reconcile flow and associate it with the etcd pod (gardener/etcd-druid#233, @aaronfern)
[OPERATOR] A new flag --enable-backup-compation has been introduced which globally enables automatic compaction of backups. (gardener/etcd-druid#258, @timuthy)
[OPERATOR] A new controller named lease controller has been introduced. Lease controller will be responsible for creating compaction job based on the delta event lease. (gardener/etcd-druid#235, @abdasgupta)
- For this, two new Leases are introduced: One to hold the value of the latest full snapshot revision and one for the last delta revision.

[OPERATOR] The multi-node etcd proposal has been updated and now considers ephemeral volumes not being an integral part of the multi-node feature set. (gardener/etcd-druid#256, @timuthy)

[OPERATOR] It is now possible to specify owner check parameters in the Etcd resource. (gardener/etcd-druid#239, @stoyanr)

[OPERATOR] The backup-restore sidecar will now check if the owner domain name resolves to the specified owner ID and if not, take a final full snapshot and disable the cluster. (gardener/etcd-backup-restore#383, @stoyanr)

[OPERATOR] Added health package to allow backup-restore to renew member leases to indicate member health and snapshot leases to indicate snapshots being taken successfully (gardener/etcd-backup-restore#382, @aaronfern)
- Added flags to the server and compact subcommand. --enable-snapshot-lease-renewal to enable snapshot lease renewal, --enable-member-lease-renewal to enable member lease updates, full-snapshot-lease-name to specify the full snapshot lease name, and delta-snapshot-lease-name to specify the delta snapshot lease name
- Pod name and namespace has to be passed via environment variables (POD_NAME and POD_NAMESPACE) when running the server subcommand when --enable-member-lease-renewal flag is set to true
- Pod namespace needs to be passed via an environment variable (POD_NAMESPACE) when running the server subcommand when --enable-snapshot-lease-renewal flag is set to true
- Pod namespace needs to be passed via an environment variable (POD_NAMESPACE) when running the compact subcommand when --enable-snapshot-lease-renewal flag is set to true