install necessary packages:

apt-get install cman clvm gfs2-utils gfs2-cluster multipath-tools xmlstarlet ntp

in case you are using iscsi attached quorum disk - install iscsi:

apt-get install open-iscsi

disable waiting for quorum device:

echo "CMAN_QUORUM_TIMEOUT=0" >> /etc/default/cman

edit /etc/lvm/lmv.conf, set:

mirror_logs_require_separate_pvs = 1
locking_type = 3

add node to the /etc/hosts for all nodes in cluster e.g. (essential when cluster based on FQDN instead of IPs):

127.0.0.1       localhost
127.0.1.1       zemi.starlab.cz zemi
 
# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
 
10.0.0.23 semi.starlab.cz
10.0.0.120 demi.starlab.cz
10.0.0.130 lemmy.starlab.cz
10.0.0.140 zemi.starlab.cz

copy /root/cluster_bin directory from existing node to new one

add new node on one of existing nodes:

ccs_tool addnode 10.0.0.140 -v 1 -f ac_node port=4 -n 4

distribute the configruation in cluster

cluster_bin/distribute_config

disable services on startup (it will be handled manually)

systemctl disable cman.service
systemctl disable clvm.service
systemctl disable gfs2-cluster.service

(optional) if is qourum disk connected via iscsi set it conect automatically

if using gfs2 filesystem add journal for it:

gfs2_jadd -j Number MountPoint

run

cluster_bin/start_cluster.sh