proxmox node gone

[MrTof]

i had 5 nodes pve cluster who was working but on one node i move the network cable on an another switch
then the cluster see only 4 nodes and expected 5
pvecm status
Quorum information
------------------
Date: Wed Jun 12 15:48:44 2019
Quorum provider: corosync_votequorum
Nodes: 4
Node ID: 0x00000003
Ring ID: 3/1028
Quorate: Yes

Votequorum information
----------------------
Expected votes: 5
Highest expected: 5
Total votes: 4
Quorum: 3
Flags: Quorate

Membership information
----------------------
Nodeid Votes Name
0x00000003 1 X.X.X.4 (local)
0x00000001 1 X.X.X.3
0x00000002 1 X.X.X.2
0x00000004 1 X.X.X.1

and on the node now is alone despite reboot
pvecm status
Quorum information
------------------
Date: Wed Jun 12 16:13:17 2019
Quorum provider: corosync_votequorum
Nodes: 1
Node ID: 0x00000005
Ring ID: 5/1036
Quorate: No

Votequorum information
----------------------
Expected votes: 5
Highest expected: 5
Total votes: 1
Quorum: 3 Activity blocked
Flags:

Membership information
----------------------
Nodeid Votes Name
0x00000005 1 X.X.X.5 (local)
How can i tell him to rejoin the initial cluster ?

 

[Chris]

Hi,
as a first step you could test multicast communication with omping https://pve.proxmox.com/wiki/Multicast_notes#Using_omping_to_test_multicast
Also, check your journal for errors `journalctl -b` and check the status of corosync and pve-cluster services `systemctl status corosync pve-cluster`.

 

[MrTof]

Thanks,
you re right when i come back on the older switch
everything is allright there is a multicast problem between the netgear switch and the cisco.