Remove node from 2 nodes cluster

Cyberavis

Member
Oct 9, 2016
8
0
6
40
Following the documentation

I have found a problem
Code:
root@NODE-2:~# pvecm delnode NODE-1
cluster not ready - no quorum?

Using pvecm status I am able to see that the quorum status is listed as "Activity blocked" and is 2.
So you can't remove node from 2 nodes cluster because quorum is 2.

My solution for this is to set the quorum to 1 by
Code:
root@NODE-2:~# pvecm expected 1

Might someone tell that is good way to decrease the quorum of cluster or is there a better way?
And should I do something after that, when I want to add another node to this one node cluster (now remaining node have Nodeid 2)?
 
Hi,

what Proxmox VE Version you are using?
 
Hi, Cyberavis.

I successfully split 2 node cluster online with working vms with simple scripts
executing on both nodes.

Code:
~# cat stop.sh
#!/bin/sh
systemctl stop pvestatd.service
systemctl stop pvedaemon.service
systemctl stop pve-cluster.service
systemctl stop corosync
systemctl stop pve-cluster
systemctl stop pve-ha-crm.service
systemctl stop pve-ha-lrm.service

~# cat del.sh
#!/bin/sh
DIR="/var/lib/pve-cluster"
DB="$DIR/config.db"
BIN="sqlite3 -line"
$BIN $DB ".dump" >$DIR/config.db.sql
$BIN $DB "delete from tree where name = 'corosync.conf';"
$BIN $DB "delete from tree where name like 'ha%';"
$BIN $DB "delete from tree where name = 'resources.cfg';"
$BIN $DB "delete from tree where name = 'groups.cfg';"
$BIN $DB "delete from tree where name = 'manager_status';"
$BIN $DB "delete from tree where name = 'crm_commands';"
$BIN $DB "delete from tree where name = 'lock';"
$BIN $DB "delete from tree where name = 'lrm_status';"
pmxcfs -l
rm /etc/pve/corosync.conf
rm /etc/corosync/*
rm /var/lib/corosync/*
find /etc/pve/nodes/* -maxdepth 0 ! -name `hostname` -exec rm -Rf {} \;          

~# cat start.sh
#!/bin/sh
killall pmxcfs
systemctl start pve-cluster
systemctl start corosync
systemctl start pvedaemon.service
systemctl start pvestatd.service
systemctl start pve-ha-crm.service
systemctl start pve-ha-lrm.service

proxmox version 4.X

dale.
 
Last edited:
I try do it in 5.1

Code:
root@NODE-2:~# pveversion -v
proxmox-ve: 5.1-25 (running kernel: 4.13.4-1-pve)
pve-manager: 5.1-35 (running version: 5.1-35/722cc488)
pve-kernel-4.13.4-1-pve: 4.13.4-25
libpve-http-server-perl: 2.0-6
lvm2: 2.02.168-pve6
corosync: 2.4.2-pve3
libqb0: 1.0.1-1
pve-cluster: 5.0-15
qemu-server: 5.0-17
pve-firmware: 2.0-3
libpve-common-perl: 5.0-20
libpve-guest-common-perl: 2.0-13
libpve-access-control: 5.0-7
libpve-storage-perl: 5.0-16
pve-libspice-server1: 0.12.8-3
vncterm: 1.5-2
pve-docs: 5.1-12
pve-qemu-kvm: 2.9.1-2
pve-container: 2.0-17
pve-firewall: 3.0-3
pve-ha-manager: 2.0-3
ksm-control-daemon: 1.2-2
glusterfs-client: 3.8.8-1
lxc-pve: 2.1.0-2
lxcfs: 2.0.7-pve4
criu: 2.11.1-1~bpo90
novnc-pve: 0.6-4
smartmontools: 6.5+svn4324-1
zfsutils-linux: 0.7.2-pve1~bpo90
 
Exactly what I'm looking for!

I try it to 5.2.

But is it safe? No trouble at all until now?
 

About

The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!