====== Installation on Debian 8 Jessie ======
  - install necessary packages:<code bash>
apt-get install cman clvm gfs2-utils gfs2-cluster multipath-tools xmlstarlet ntp</code>
  - in case you are using iscsi attached quorum disk - install iscsi:<code bash>
apt-get install open-iscsi</code>
  - install fencing-agents either via apt or from git (better):<code bash>
apt-get install fence-agents</code>or [[linux:netio-fencing | the newest version from git]]
    * in case you are using Netio 230A copy its agent from [[linux:netio-fencing#netio_230a_agent]] to /usr/sbin/fence_netio_230A
  - disable waiting for quorum device:<code bash>echo "CMAN_QUORUM_TIMEOUT=0" >> /etc/default/cman</code>
  - edit /etc/lvm/lmv.conf, set:<code bash>
mirror_logs_require_separate_pvs = 1
locking_type = 3
</code>

====== Adding node to the cluster ======
  - add node to the /etc/hosts for all nodes in cluster e.g. (essential when cluster based on FQDN instead of IPs):<code bash>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</code>
  - copy /root/cluster_bin directory from existing node to new one
  - add new node on one of existing nodes:<code bash>ccs_tool addnode 10.0.0.140 -v 1 -f ac_node port=4 -n 4</code>
  - distribute the configruation in cluster<code bash>cluster_bin/distribute_config</code>
  - disable services on startup (it will be handled manually)<code bash>
systemctl disable cman.service
systemctl disable clvm.service
systemctl disable gfs2-cluster.service</code>
  - (optional) if is qourum disk connected via iscsi set it conect automatically
  - if using gfs2 filesystem add journal for it:<code bash>gfs2_jadd -j Number MountPoint</code>
  - run <code bash>cluster_bin/start_cluster.sh</code>