[Feature] The latest snapshot info in etcd status about etcd-druid HOT 4 OPEN

@shreyas-s-rao @swapnilgm

from etcd-druid.

The etcd-backup-restore, restores from latest snapshot and there is no PITR supported. So such requirements should not be there.

But it makes sense, as ab individual project - irrespective of gardener, where case of dynamic snapshot demand, i.e. when snapshot is triggered via API call on etcd-backup-restore server is valid. It makes sense to me, to druid to introduce snapshot resource, on creation of which druid will call API on etcd-backup-restore to take dynamic snapshot. Currently that call is synchronous and only returns error in case anything goes wrong. We should modify this to return the snapshot metadata. This could be preserved in snapshot resource.

from etcd-druid.

In that case, don't we want a separate API to simply expose latest snapshot details? Or is the case that druid will have to take a snapshot in order to get the latest snapshot info?

from etcd-druid.

Will be solved by #206 , which allows the leading backup sidecar to update its snapshot info (LastSnapshot, SnapshotType, LastRevision, Timestamp, SnapshotStatus) as part of the EtcdMember status or the EtcdMemberState spec, discussion for which is currently ongoing.

from etcd-druid.