How to turn a cluster into a single machine

[hellangledar]

原来5节点的集群想变成2节点的集群，但是两个节点关闭后就不能链接了。我想问如何将5节点集群变成2节点集群

 

[t.lamprecht]

See https://pve.proxmox.com/pve-docs/chapter-pvecm.html#pvecm_separate_node_without_reinstall

 

[hellangledar]

请参阅https://pve.proxmox.com/pve-docs/chapter-pvecm.html#pvecm_separate_node_without_reinstall

你好，我看看。按照这种方法，先取消集群，再隔离一个节点。最后，留下一两个节点运行。操作不是在集群模式下吗？

 

[t.lamprecht]

Sorry but this forum is using English, I only got the general question from your english title.

 

[hellangledar]

See https://pve.proxmox.com/pve-docs/chapter-pvecm.html#pvecm_separate_node_without_reinstall

Hello, I have a look. According to this method, the cluster is cancelled, and then one node is isolated. Finally, one or two nodes are left to run. The operation is not in cluster mode?

 

[t.lamprecht]

With the how-to the cluster stay intact, but one node is removed from it and made stand alone again.
That can then be repeated for other nodes you want to remove from the cluster.

 

[hellangledar]

With the how-to the cluster stay intact, but one node is removed from it and made stand alone again.
That can then be repeated for other nodes you want to remove from the cluster.

But my cluster uses CEPH, which is the same operation?

 

[t.lamprecht]

No, with ceph special care is required. Depends on what do you want to do with the ceph cluster, as it cannot work with less than 3 nodes anyway - so do you want to destroy ceph?

 

[hellangledar]

No, with ceph special care is required. Depends on what do you want to do with the ceph cluster, as it cannot work with less than 3 nodes anyway - so do you want to destroy ceph?

I don't want to. Because there are virtual machines used in production on the cluster, we can't let CEPH have problems

 

[t.lamprecht]

Why do you want to separate the Proxmox VE cluster then?

Separating a PVE node to stand alone makes while keeping it as active ceph node and let it host OSDs is possible but makes IMO not much sense, especially if the other ceph nodes are still in a PVE cluster.

What is your original reason for wanting to separate the PVE cluster?