PROX01 # pvecm create cluster01

Corosync Cluster Engine Authentication key generator.
Gathering 2048 bits for key from /dev/urandom.
Writing corosync key to /etc/corosync/authkey.
Writing corosync config to /etc/pve/corosync.conf
Restart corosync and cluster filesystem

PROX01 # pvecm status

Cluster information
-------------------
Name:             cluster01
Config Version:   1
Transport:        knet
Secure auth:      on

Quorum information
------------------
Date:             Fri Sep  6 15:47:03 2024
Quorum provider:  corosync_votequorum
Nodes:            1
Node ID:          0x00000001
Ring ID:          1.40
Quorate:          Yes

Votequorum information
----------------------
Expected votes:   1
Highest expected: 1
Total votes:      1
Quorum:           1
Flags:            Quorate

Membership information
----------------------
    Nodeid      Votes Name
0x00000001          1 192.168.204.240 (local)

PROX02 # pvecm add 192.168.204.240

Please enter superuser (root) password for '192.168.204.240': *******
Establishing API connection with host '192.168.204.240'
The authenticity of host '192.168.204.240' can't be established.
X509 SHA256 key fingerprint is 63:4A:20:E8:FB:6A:3E:72:50:61:1B:F0:01:F7:9C:61:29:0E:9C:52:48:C7:52:87:AC:71:CA:83:62:A0:3F:87.
Are you sure you want to continue connecting (yes/no)? yes
Login succeeded.
check cluster join API version
No cluster network links passed explicitly, fallback to local node IP '192.168.204.242'
Request addition of this node
Join request OK, finishing setup locally
stopping pve-cluster service
backup old database to '/var/lib/pve-cluster/backup/config-1725638089.sql.gz'
waiting for quorum...OK
(re)generate node files
generate new node certificate
merge authorized SSH keys
generated new node certificate, restart pveproxy and pvedaemon services
successfully added node 'DELL' to cluster.

PROX02 # pvecm status

Cluster information
-------------------
Name:             cluster01
Config Version:   2
Transport:        knet
Secure auth:      on

Quorum information
------------------
Date:             Sat Sep  7 00:57:02 2024
Quorum provider:  corosync_votequorum
Nodes:            2
Node ID:          0x00000002
Ring ID:          1.44
Quorate:          Yes

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

Membership information
----------------------
    Nodeid      Votes Name
0x00000001          1 192.168.204.240
0x00000002          1 192.168.204.242 (local)

# pvecm nodes

Membership information
----------------------
    Nodeid      Votes Name
         1          1 SUPERMICRO (local)
         2          1 DELL
         3          1 LENOVO

# pvecm delnode LENOVO

Killing node 3

# rm -rf /etc/pve/nodes/LENOVO

# systemctl stop pve-cluster corosync
# pmxcfs -l
# rm /etc/corosync/*
# rm /etc/pve/corosync.conf
# killall pmxcfs
# rm -rf /etc/pve/nodes/SUPERMICRO
# rm -rf /etc/pve/nodes/DELL
# systemctl start pve-cluster

# systemctl stop pve-cluster corosync
# pmxcfs -l
# rm /etc/corosync/*
# rm /etc/pve/corosync.conf
# killall pmxcfs
# systemctl start pve-cluster