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You need to do the following ceph osd crush rm osd_num ceph osd auth del osd_num ceph osd rm osd_num ceph osd crush rm nodename All the steps you have to do after stopping ceph mon and ceph mgr service on nodes to be removed To avoid rebalancing you may set nout and norebalance flags

I had the same issue but with changing sysctl values in vm and settings recommend by Alwin, I am not facing issue now

Something like this dir: local path /var/lib/vz content snippets,backup,rootdir,vztmpl,images,iso maxfiles 0 shared 1 is_mountpoint 1 mkdir 0 and /etc/fstab You have following entry <ip of nfs>: <shared directory> /var/lib/vz nfs rw,hard 0 0

Just mount the nfs using fstab file and use the is mountable flag in storage.cfg

My usecase is working fine I have a VM on cluster1, I need to transfer this to cluster 2 as proxmox does not support migration from cluster1 to cluster2. 1) I have added ceph storage of cluster2 as external RBD in cluster 1 2) Create a clone of running VM and chose the destination as External...

But on the auth side I am still getting error but the pvesm error is gone Name Type Status Total Used Available % BackupNFS pbs active 4294967296 663574528 3631392768 15.45% BackupRBD rbd...

There was a typo mistake in the pool name of the external ceph It is working fine Thank you

All ceph are on 14.2.10

No only ssh works fine, rest is giving error root@inc1pve25:/etc/pve/priv/ceph# ceph -m 172.19.2.24 --user admin -s [errno 1] error connecting to the cluster

Yes all nodes are reachable no issues. I am able to login to all mon hosts of external ceph cluster from my cluster In the UI I get following error when i click on content on external Ceph rbd error: rbd: listing images failed: (2) No such file or directory (500)

I meant adding the external Ceph == This is the change

I have followed this procedure https://pve.proxmox.com/wiki/Storage:_RBD

I have two proxmox ceph clusters , I have added the ceph block storage of one cluster to another another cluster as follows rbd: BackupRBD content images krbd 1 monhost 172.19.2.24 172.19.2.25 172.19.2.26 172.19.2.27 172.19.2.28 172.19.2.29 172.19.2.30 172.19.2.31...

I meant managing multi cluster , I have subscribed to devel list to get an update

Ok Ok When are you winking for Cross Cluster Authentication

it is already released apt-get dist-upgrade will upgrade it

Ceph cannot run on single node, it require minimum 3 nodes. So Ceph is out

can you change the setting of VM from KVM64 to Host and try again

It is correct only. The memory showing available is actually a reclaimable space by kernel. Read the article attached for your reference. It is true for Ubuntu/RHEL/CentOS