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My cluster seems broken, please help

Here is my setup:

I have 2 nodes (let's call them node1 and node2) on ip addresses 10.19.82.1 and 10.19.82.2. It used to work nicely.
I now want to add a third node (with ip address 10.19.82.3) but it fails :


Code:

root@node3:~# pvecm add 10.19.82.1
unable to copy ssh ID

root@node3:~# ssh-copy-id 10.19.82.1
cat: write error: Permission denied

root@node1:~# touch /etc/pve/test
touch: cannot touch `/etc/pve/test': Permission denied

It looks like my /etc/pve is read only, but I can't find why.

Status looks OK on both nodes:
Code:

root@node1:~# pvecm status
Version: 6.2.0
Config Version: 8
Cluster Name: ponytech
Cluster Id: 28530
Cluster Member: Yes
Cluster Generation: 62192
Membership state: Cluster-Member
Nodes: 2
Expected votes: 2
Total votes: 2
Node votes: 1
Quorum: 2
Active subsystems: 5
Flags:
Ports Bound: 0
Node name: node1
Node ID: 2
Multicast addresses: 239.192.111.225
Node addresses: 10.19.82.1

root@node2:~# pvecm status
Version: 6.2.0
Config Version: 8
Cluster Name: ponytech
Cluster Id: 28530
Cluster Member: Yes
Cluster Generation: 62192
Membership state: Cluster-Member
Nodes: 2
Expected votes: 2
Total votes: 2
Node votes: 1
Quorum: 2
Active subsystems: 5
Flags:
Ports Bound: 0
Node name: node2
Node ID: 1
Multicast addresses: 239.192.111.225
Node addresses: 10.19.82.2

Unicast is working:
Code:

root@node1:~# ssmpingd

root@node2:# asmping 239.192.111.225 10.19.82.1
asmping joined (S,G) = (*,239.192.111.234)
pinging 10.19.82.1 from 10.19.82.2
  unicast from 10.19.82.1, seq=1 dist=0 time=8.970 ms


root@node3:# asmping 239.192.111.225 10.19.82.1
asmping joined (S,G) = (*,239.192.111.234)
pinging 10.19.82.1 from 10.19.82.3
  unicast from 10.19.82.1, seq=1 dist=0 time=9.123 ms
 ...

I tried restarting pve-cluster, cman, pvedaemon, pvestatd, pve-manager. It all worked but cman :

Code:

root@node1# service cman restart
Stopping cluster:
  Stopping dlm_controld...
[FAILED]

Anyone can help ? I had been stuck on this for hours :(
Thanks a lot.

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