Ceph

When upgrading to v16.2.6 a v16.2.4 cluster using Docker the upgrade fails because it is not able to pull the image from Docker Hub:

ceph orch upgrade status {
"target_image": "docker.io/ceph/ceph:v16.2.6",
"in_progress": true,
"services_complete": [],
"progress": "",
"message": "Error: UPGRADE_FAILED_PULL: Upgrade: failed to pull target image"
}

The reason is that Docker Hub is no longer updated and does not have the v16.2.6 so we have to use quay.io instead:

ceph orch upgrade start --image quay.io/ceph/ceph:v16.2.6

I think the upgrade documentation should be updated (PR coming)