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my-rook-config/PendingReleaseNotes.md
T
Sébastien Han dab9233c8b ceph: add CRD setting for pool size 1
As of Octopus, Ceph will prevent you from creating a pool with a
replica size of 1. Allowing such pool could lead to data loss, so enable
the new option: requireSafeReplicaSize: false if you are **ABSOLUTELY**
certain that is what you want.

Closes: https://github.com/rook/rook/issues/4889
Signed-off-by: Sébastien Han <seb@redhat.com>
2020-02-25 16:28:58 +01:00

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Markdown

# Major Themes
## Action Required
## Notable Features
- Added K8s 1.17 to the test matrix and removed K8s 1.12 from the test matrix.
### Ceph
- OSD refactor: drop support for Rook legacy OSD, directory OSD and Filestore OSD. For more details refer to the [corresponding issue](https://github.com/rook/rook/issues/4724).
- OSD on PVC now supports a metadata device, [refer to the cluster on PVC section](Documentation/ceph-cluster-crd.html#dedicated-metatada-device) or the [corresponding issue](https://github.com/rook/rook/issues/3852).
- OSD on PVC now supports PVC expansion, if the size of the underlying block increases the Bluestore main block and the overall storage capacity will grow up.
- Ceph Nautilus 14.2.5 is the minimum supported version
- OSD on PVC doesn't use LVM anymore to configure OSD, but solely relies on the entire block device, done [here](https://github.com/rook/rook/pull/4435).
- Specific devices for OSDs can now be specified using the full udev path (e.g. /dev/disk/by-id/ata-ST4000DM004-XXXX) instead of the device name.
- OSD on PVC CRUSH device storage class can now be changed by setting an annotation "crushDeviceClass" on the "data" volume template. See "cluster-on-pvc.yaml" for example.
- Rook will now refuse to create pools with replica size 1 unless `requireSafeReplicaSize` is set to false.
### EdgeFS
### YugabyteDB
### Cassandra
- Added [JMX Prometheus exporter](https://github.com/prometheus/jmx_exporter) support.
## Breaking Changes
### <Storage Provider>
### Minio
- The minio operator was removed from Rook
## Known Issues
### <Storage Provider>
## Deprecations
### <Storage Provider>