build: keep default ceph version at 19.2.3

As discussed in the community meeting, wait until the next Rook
minor release v1.20 to change the default Ceph version to
tentacle v20. While v20 is already supported with v1.19.x,
we will just wait to change the default version in Rook.

Signed-off-by: Travis Nielsen <tnielsen@redhat.com>

Documentation/Helm-Charts/ceph-cluster-chart.md

@@ -70,7 +70,7 @@ The following table lists the configurable parameters of the rook-operator chart
 | `cephFileSystems` | A list of CephFileSystem configurations to deploy | See [below](#ceph-file-systems) |
 | `cephImage.allowUnsupported` |  | `false` |
 | `cephImage.repository` |  | `"quay.io/ceph/ceph"` |
-| `cephImage.tag` |  | `"v20.2.1"` |
+| `cephImage.tag` |  | `"v19.2.3"` |
 | `cephObjectStores` | A list of CephObjectStore configurations to deploy | See [below](#ceph-object-stores) |
 | `clusterName` | The metadata.name of the CephCluster CR | The same as the namespace |
 | `configOverride` | Cluster ceph.conf override | `nil` |

deploy/charts/rook-ceph-cluster/values.yaml

@@ -98,7 +98,7 @@ cephImage:
   # In production, use a specific version tag instead of the general v19 flag, which pulls the latest release and could result in different
   # versions running within the cluster. See tags available at https://hub.docker.com/r/ceph/ceph/tags/.
   # To be more precise, you can always use a timestamp tag such as quay.io/ceph/ceph:v19.2.3-20250717
-  tag: v20.2.1
+  tag: v19.2.3
   # Whether to allow unsupported versions of Ceph. Currently Squid and Tentacle are supported.
   # Future versions such as Tentacle (v20) would require this to be set to `true`.
   # Do not set to true in production.

deploy/examples/cluster.yaml

@@ -21,7 +21,7 @@ spec:
     # versions running within the cluster. See tags available at https://hub.docker.com/r/ceph/ceph/tags/.
     # If you want to be more precise, you can always use a timestamp tag such as quay.io/ceph/ceph:v20.2.1-20260402
     # This tag might not contain a new Ceph version, just security fixes from the underlying operating system, which will reduce vulnerabilities
-    image: quay.io/ceph/ceph:v20.2.1
+    image: quay.io/ceph/ceph:v19.2.3
     # Whether to allow unsupported versions of Ceph. Currently Squid and Tentacle are supported.
     # Future versions such as Umbrella (v21) would require this to be set to `true`.
     # Do not set to true in production.

deploy/examples/images.txt

@@ -1,6 +1,6 @@
  docker.io/rook/ceph:v1.19.3
  gcr.io/k8s-staging-sig-storage/objectstorage-sidecar:v0.2.2
- quay.io/ceph/ceph:v20.2.1
+ quay.io/ceph/ceph:v19.2.3
  quay.io/ceph/cosi:v0.1.4
  quay.io/cephcsi/ceph-csi-operator:v0.6.0
  quay.io/cephcsi/cephcsi:v3.16.2