k=Installation=

[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
192.168.244.161 fix
192.168.244.162 foxy
eth1
10.168.244.161   fix-ha
10.168.244.162   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="4" name="pacemaker">
    <fence_daemon clean_start="0" post_fail_delay="0" post_join_delay="3"/>
    <clusternodes>
            <clusternode name="server1" nodeid="1" votes="1">
                <fence>
                        <method name="pcmk-redirect">
                                <device name="pcmk" port="server1"/>
                        </method>
                </fence>
            </clusternode>
            <clusternode name="server2" nodeid="2" votes="1">
                <fence>
                        <method name="pcmk-redirect">
                                <device name="pcmk" port="server2"/>
                        </method>
                </fence>
            </clusternode>
            <clusternode name="server3" nodeid="3" votes="1">
                <fence>
                        <method name="pcmk-redirect">
                                <device name="pcmk" port="server3"/>
                        </method>
                </fence>
            </clusternode>
    </clusternodes>
  <fencedevices>
    <fencedevice name="pcmk" agent="fence_pcmk"/>
  </fencedevices>
    <cman/>
</cluster>

[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:

                bindnetaddr: 10.168.244.0

'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

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  ]

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 ]

Set up dlm_controld and o2cb in cluster's CIB

node fix
node foxy
primitive resDLM ocf:pacemaker:controld \
        params daemon="dlm_controld" \
        op monitor interval="120s"
primitive resO2CB ocf:pacemaker:o2cb \
       params stack="cman" \
       op monitor interval="120s"
clone cloneDLM resDLM \
        meta globally-unique="false" interleave="true"
clone cloneO2CB resO2CB \
        meta globally-unique="false" interleave="true"
colocation colO2CBDLM inf: cloneO2CB cloneDLM
order ordDLMO2CB 0: cloneDLM cloneO2CB
property $id="cib-bootstrap-options" \
       dc-version="1.1.6-9971ebba4494012a93c03b40a2c58ec0eb60f50c" \
       cluster-infrastructure="cman" \
       stonith-enabled="false" \
       no-quorum-policy="ignore"

Set up dlm_controld and o2cb with drbd in cluster's CIB

node fix
node foxy
primitive resDLM ocf:pacemaker:controld \
       params daemon="dlm_controld" \
       op monitor interval="120s"
primitive resDRBD ocf:linbit:drbd \
       params drbd_resource="disk0" \
       operations $id="resDRBD-operations" \
       op monitor interval="20" role="Master" timeout="20" \
       op monitor interval="30" role="Slave" timeout="20"
primitive resO2CB ocf:pacemaker:o2cb \
       params stack="cman" \
       op monitor interval="120s"
ms msDRBD resDRBD \
       meta resource-stickines="100" notify="true" master-max="2" interleave="true"
clone cloneDLM resDLM \
       meta globally-unique="false" interleave="true"
clone cloneO2CB resO2CB \
       meta globally-unique="false" interleave="true"
colocation colDLMDRBD inf: cloneDLM msDRBD:Master
colocation colO2CBDLM inf: cloneO2CB cloneDLM
order ordDLMO2CB 0: cloneDLM cloneO2CB
property $id="cib-bootstrap-options" \
       dc-version="1.1.6-9971ebba4494012a93c03b40a2c58ec0eb60f50c" \
       cluster-infrastructure="cman" \
       stonith-enabled="false" \
       no-quorum-policy="ignore"

now we format one site with ocfs2

sudo mkfs.ocfs2 /dev/drbd/by-res/disk0

Set up dlm_controld and o2cb with drbd and mounting in both sites in cluster's CIB

node fix
node foxy
primitive resDLM ocf:pacemaker:controld \
        params daemon="dlm_controld" \
        op monitor interval="120s"
primitive resDRBD ocf:linbit:drbd \
        params drbd_resource="disk0" \
        operations $id="resDRBD-operations" \
        op monitor interval="20" role="Master" timeout="20" \
       op monitor interval="30" role="Slave" timeout="20"
primitive resFS ocf:heartbeat:Filesystem \
        params device="/dev/drbd/by-res/disk0" directory="/opt" fstype="ocfs2" \
        op monitor interval="120s"
primitive resO2CB ocf:pacemaker:o2cb \
       params stack="cman" \
       op monitor interval="120s"
ms msDRBD resDRBD \
       meta resource-stickines="100" notify="true" master-max="2" interleave="true"
clone cloneDLM resDLM \
       meta globally-unique="false" interleave="true"
clone cloneFS resFS \
       meta interleave="true" ordered="true"
clone cloneO2CB resO2CB \
       meta globally-unique="false" interleave="true"
colocation colDLMDRBD inf: cloneDLM msDRBD:Master
colocation colFSO2CB inf: cloneFS cloneO2CB
colocation colO2CBDLM inf: cloneO2CB cloneDLM
order ordDLMO2CB 0: cloneDLM cloneO2CB
order ordO2CBFS 0: cloneO2CB cloneFS
property $id="cib-bootstrap-options" \
       dc-version="1.1.6-9971ebba4494012a93c03b40a2c58ec0eb60f50c" \
       cluster-infrastructure="cman" \
       stonith-enabled="false" \
       no-quorum-policy="ignore"

crm configure edit

node fix
node foxy
primitive resDLM ocf:pacemaker:controld \
        params daemon="dlm_controld" \
        op monitor interval="120s"
primitive resGFSD ocf:pacemaker:controld \
        params daemon="gfs_controld" args="" \
        op monitor interval="120s"
primitive resO2CB ocf:pacemaker:o2cb \
        params stack="cman" \
        op monitor interval="120s"
clone cloneDLM resDLM \
        meta globally-unique="false" interleave="true"
clone cloneGFSD resGFSD \
        meta globally-unique="false" interleave="true" target-role="Started"
clone cloneO2CB resO2CB \
        meta globally-unique="false" interleave="true"
colocation colGFSDDLM inf: cloneGFSD cloneDLM
colocation colO2CBDLM inf: cloneO2CB cloneDLM
order ordDLMGFSD 0: cloneDLM cloneGFSD
order ordDLMO2CB 0: cloneDLM cloneO2CB
property $id="cib-bootstrap-options" \
        dc-version="1.1.6-9971ebba4494012a93c03b40a2c58ec0eb60f50c" \
        cluster-infrastructure="cman" \
       stonith-enabled="false" \
       no-quorum-policy="ignore"

EXTREMELY IMPORTANT: Notice that this example has STONITH disabled. This is just a HOWTO for a basic
setup. You should't be running shared resources with disabled STONITH. Check pacemaker's documentation 
for guidance on setting this up. If you are not sure about this, stop right now!

Save and quit. Running

crm status

should now show all these services running:

# crm status
============
Last updated: Fri Sep  7 21:28:36 2012
Last change: Fri Sep  7 21:26:36 2012 via cibadmin on fix
Stack: cman
Current DC: fix - partition with quorum
Version: 1.1.6-9971ebba4494012a93c03b40a2c58ec0eb60f50c
2 Nodes configured, unknown expected votes
6 Resources configured.
============ 

Online: [ fix foxy ] 

Clone Set: cloneDLM [resDLM]
    Started: [ fix foxy ]
Clone Set: cloneGFSD [resGFSD]
    Started: [ fix foxy ]
Clone Set: cloneO2CB [resO2CB]
    Started: [ fix foxy ]

PACEMAKER

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