Revert cluster to single instance systems

[tirili]

Having a 2 node cluster like

# pvecm status
Quorum information
------------------
Date:             Wed May  1 13:33:16 2019
Quorum provider:  corosync_votequorum
Nodes:            2
Node ID:          0x00000001
Ring ID:          1/8
Quorate:          Yes

Votequorum information
----------------------
Expected votes:   2
Highest expected: 2
Total votes:      2
Quorum:           2
Flags:            Quorate

Membership information
----------------------
    Nodeid      Votes Name
0x00000001          1 10.40.20.47 (local)
0x00000002          1 10.40.20.54

I was able to remove on the master all nodes:

# pvecm delnode n2054

Now I have

# pvecm status
Quorum information
------------------
Date:             Wed May  1 14:04:29 2019
Quorum provider:  corosync_votequorum
Nodes:            1
Node ID:          0x00000001
Ring ID:          1/12
Quorate:          No

Votequorum information
----------------------
Expected votes:   2
Highest expected: 2
Total votes:      1
Quorum:           2 Activity blocked
Flags:

Membership information
----------------------
    Nodeid      Votes Name
0x00000001          1 10.40.20.47 (local)

Which is the recommended way to make the last(local) reverting to a standalone system again?

 

[tirili]

When I go to the system n2054 (which I removed before), (although I rebooted it), it still shows in the GUI the "master"/cluster in the "Datacenter" view. How can this being reverted as well?

Any help is appreciated.

 

[wolfgang]

Hi,

see
https://forum.proxmox.com/threads/t...luster-without-killing-the-running-vms.53892/

 

[tirili]

Hello Wolfgang,

Something went wrong, my last node is readonly!

 # rm /etc/pve/corosync.conf
rm: cannot remove '/etc/pve/corosync.conf': Permission denied
# pvecm expected 1
Cannot initialize CMAP service

# pmxcfs -l
[main] notice: unable to acquire pmxcfs lock - trying again
[main] crit: unable to acquire pmxcfs lock: Resource temporarily unavailable
[main] notice: exit proxmox configuration filesystem (-1)

Do you have any idea / hint?

 

[tirili]

I Solved by myself

# rm /var/lib/pve-cluster/.pmxcfs.lockfile
# pmxcfs -l
[main] notice: forcing local mode (although corosync.conf exists)
# mv /etc/pve/corosync.conf{,.disabled}
# shutdown -r now