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[ALL] Initial setup

Install required packages:

sudo apt-get install pacemaker cman resource-agents fence-agents gfs2-utils gfs2-cluster ocfs2-tools-cman openais drbd8-utils

Make sure each host can resolve all other hosts. Best way to achive this is by adding their IPs and hostnames to /etc/hosts on all nodes. In this example, that would be:

eth0 fix foxy
eth1   fix-ha   foxy-ha

Disable o2cb from starting:

update-rc.d -f o2cb remove

[ALL] Create /etc/cluster/cluster.conf

Paste this into /etc/cluster/cluster.conf :

<?xml version="1.0"?>
<cluster config_version="1" name="pacemaker">
<cman two_node="1" expected_votes="1"> </cman>
   <fence_daemon clean_start="0" post_fail_delay="0" post_join_delay="3"/>
           <clusternode name="fix" nodeid="1" votes="1">
                       <method name="pcmk-redirect">
                               <device name="pcmk" port="fix"/>
           <clusternode name="foxy" nodeid="2" votes="1">
                       <method name="pcmk-redirect">
                               <device name="pcmk" port="foxy"/>
   <fencedevice name="pcmk" agent="fence_pcmk"/>

Validate the config

# ccs_config_validate 
Configuration validates

[ALL] Edit /etc/corosync/corosync.conf

Find pacemaker service in /etc/corosync/corosync.conf and bump version to 1:

service {
        # Load the Pacemaker Cluster Resource Manager
        ver:       1
        name:      pacemaker

Replace bindnetaddr with the IP of your network. For example:


'0' is not a typo.

[ALL] Enable pacemaker init scripts

update-rc.d -f pacemaker remove
update-rc.d pacemaker start 50 1 2 3 4 5 . stop 01 0 6 .

[ALL] Start cman service and then pacemaker service

deactivat quorum

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

start cman

# service cman start
Starting cluster: 
   Checking if cluster has been disabled at boot... [  OK  ]
   Checking Network Manager... [  OK  ]
   Global setup... [  OK  ]
   Loading kernel modules... [  OK  ]
   Mounting configfs... [  OK  ]
   Starting cman... [  OK  ]
   Waiting for quorum... [  OK  ]
   Starting fenced... [  OK  ]
   Starting dlm_controld... [  OK  ]
   Unfencing self... [  OK  ]
   Joining fence domain... [  OK  ]

# cman_tool nodes
Node  Sts   Inc   Joined               Name
   1   M      4   2012-09-11 19:14:58  fix
   2   M      8   2012-09-11 19:18:35  foxy

[ALL] Enable pacemaker init scripts

update-rc.d -f pacemaker remove
update-rc.d pacemaker start 50 1 2 3 4 5 . stop 01 0 6 .

service pacemaker start
Starting Pacemaker Cluster Manager: [  OK  ]

[ONE] Setup resources

Wait for a minute until pacemaker declares all nodes online:
# crm status
Last updated: Fri Sep  7 21:18:12 2012
Last change: Fri Sep  7 21:17:17 2012 via crmd on fix
Stack: cman
Current DC: fix - partition with quorum
Version: 1.1.6-9971ebba4494012a93c03b40a2c58ec0eb60f50c
2 Nodes configured, unknown expected votes
0 Resources configured.

Online: [ fix foxy ]




[ALL] install services that will fail over between servers

In this example, I'm installing apache2

sudo apt-get install apache2

Disable their init scripts:

update-rc.d -f apache2 remove

In this example, I'll create failover for the apache2. I'll also add one additional and tie apache2.

sudo crm configure edit
primitive resAPACHE ocf:heartbeat:apache \
       params configfile="/etc/apache2/apache2.conf" httpd="/usr/sbin/apache2" \
       op monitor interval="5s"
primitive resIP-APACHE ocf:heartbeat:IPaddr2 \
       params ip="" cidr_netmask="21" nic="eth0
group groupAPACHE resIP-APACHE resAPACHE
order apache_after_ip inf: resIP-APACHE:start resAPACHE:start