[DRBD-user] linstor-server 1.20.0 final release

[Rene Peinthor]

Hi!

Here is the final release, which adds support for Amazon EBS backed storage
and several fixes to backup-shipping.

Also additional notes for the final release:

Changed property Cluster/LocalId:
We had to re-randomize this property (on controller level) for k8s/CRD
setups. This does NOT affect SQL or ETCD setups.
The Cluster/LocalId is currently only used for linstor-to-linstor backup
shipping. If you have already setup linstor
remotes, you have to update the specified ClusterIds using:
  linstor remote modify linstor <remote_name> --cluster-id
<new_cluster_id_of_remote_cluster>
Please make sure to grab the ClusterId from the remote, not the local
cluster.
If you forget to update the ClusterId you will get an "Unknown cluster"
error on the next "backup ship" attempt.

Deprecation of the OpenFlex layer:
With this release we are deprecating the OpenFlex layer. This has no effect
on the NVMe layer. Complete removal of the OpenFlex layer will be done
through one of the releases in the summer 2023.

Here are the changes since rc1:

## linstor-server
### Added
- Added SnapshotVolumeNode as part of SnapshotNode to include a snapshot
state
- Status of EBS volumes and snapshots are now queried periodically
- Added property DrbdOptions/ForceInitialSync that forces thin resources to
do an initial full sync

### Fixed
- Snapshots and SnapshotVolumes now properly delete their properties +
cleanup migration existing DB entries
- Randomized Cluster/LocalId for CRD setups since all installations had the
same ID
- Backup restore now creates new DRBD metadata and forces the initial sync
to be a full sync

https://pkg.linbit.com//downloads/linstor/linstor-server-1.20.0.tar.gz


Linstor PPA:
https://launchpad.net/~linbit/+archive/ubuntu/linbit-drbd9-stack

Cheers,
Rene
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