---------------------drbd.conf---------------------
resource drbd0 {
protocol C;
incon-degr-cmd "echo '!DRBD! pri on incon-degr' | wall ; sleep 60 ; halt -f" ;
startup {
 degr-wfc-timeout 120;    # 2 minutes.
}

disk {
   on-io-error   pass_on;
}

net {
   # TODO: Should these timeouts be relative to some heartbeat settings?
   # timeout       60;    #  6 seconds  (unit = 0.1 seconds)
   # connect-int   10;    # 10 seconds  (unit = 1 second)
   # ping-int      10;    # 10 seconds  (unit = 1 second)
  on-disconnect reconnect;
}
syncer {
  rate 1000M;
  group 1;
  al-extents 257;
}
on apolo-master {
   device     /dev/drbd0;
   disk /dev/sda3;
   address    192.168.2.120:7788;
   meta-disk  internal;

}


on apolo-slave {

 device     /dev/drbd0;
 disk       /dev/sda3;
 address    192.168.2.121:7788;
 meta-disk  internal;

  }
}

---some inf about the nodes------------
apolo-master eth0 192.168.2.104 eth1 192.168.2.120
apolo-slave eth0 192.168.2.107 eth1 192.168.2.121
/etc/hosts in both
apolo-master 192.168.2.104 
apolo-slave 192.168.2.107

-----------------cib.xml-------------
   <configuration>
     <crm_config>
       <cluster_property_set id="cib-bootstrap-options">
         <attributes>
           <nvpair id="cib-bootstrap-options-dc-version" name="dc-version" value ="2.1.3-node: 552305612591183b1628baa5bc6e903e0f1e26a3"/>
           <nvpair id="cib-bootstrap-options-symmetric-cluster" name="symmetric-cluster" value="true"/>
           <nvpair id="cib-bootstrap-options-no-quorum-policy" name="no-quorum-policy" value="stop"/>
           <nvpair id="cib-bootstrap-options-default-resource-stickiness" name="default-resource-stickiness" value="0"/>
           <nvpair id="cib-bootstrap-options-default-resource-failure-stickiness" name="default-resource-failure-stickiness" value="0"/>
           <nvpair id="cib-bootstrap-options-stonith-enabled" name="stonith-enabled" value="true"/>
           <nvpair id="cib-bootstrap-options-stonith-action" name="stonith-action" value="reboot"/>
           <nvpair id="cib-bootstrap-options-startup-fencing" name="startup-fencing" value="true"/>
           <nvpair id="cib-bootstrap-options-stop-orphan-resources" name="stop-orphan-resources" value="true"/>
           <nvpair id="cib-bootstrap-options-stop-orphan-actions" name="stop-orphan-actions" value="true"/>
           <nvpair id="cib-bootstrap-options-remove-after-stop" name="remove-after-stop" value="false"/>
           <nvpair id="cib-bootstrap-options-short-resource-names" name="short-resource-names" value="true"/>
           <nvpair id="cib-bootstrap-options-transition-idle-timeout" name="transition-idle-timeout" value="5min"/>
           <nvpair id="cib-bootstrap-options-default-action-timeout" name="default-action-timeout" value="20s"/>
           <nvpair id="cib-bootstrap-options-is-managed-default" name="is-managed-default" value="true"/>
           <nvpair id="cib-bootstrap-options-cluster-delay" name="cluster-delay" value="60s"/>
           <nvpair id="cib-bootstrap-options-pe-error-series-max" name="pe-error-series-max" value="-1"/>
           <nvpair id="cib-bootstrap-options-pe-warn-series-max" name="pe-warn-series-max" value="-1"/>
           <nvpair id="cib-bootstrap-options-pe-input-series-max" name="pe-input-series-max" value="-1"/>
         </attributes>
       </cluster_property_set>
     </crm_config>
     <nodes>
       <node id="30fcbb73-aabd-4d15-8f71-bfb9e538885c" uname="apolo-slave" type="normal"/>
       <node id="23e734e2-b052-429a-b5ae-c3d31c4487a1" uname="apolo-master" type="normal"/>
     </nodes>
     <resources>
       <group id="group_1">
         <primitive class="ocf" id="IPaddr_192_168_2_150" provider="heartbeat" type="IPaddr">
           <operations>
             <op id="IPaddr_192_168_2_150_mon" interval="5s" name="monitor" timeout="5s"/>
           </operations>
           <instance_attributes id="IPaddr_192_168_2_150_inst_attr">
             <attributes>
               <nvpair id="IPaddr_192_168_2_150_attr_0" name="ip" value="192.168.2.150"/>
             </attributes>
           </instance_attributes>
         </primitive>
         <primitive class="lsb" id="ssh_2" provider="heartbeat" type="ssh">
           <operations>
             <op id="ssh_2_mon" interval="120s" name="monitor" timeout="60s"/>
           </operations>
         </primitive>
       </group>
       <clone id="stonithclone">
         <instance_attributes id="7c1def24-c429-48ea-825c-5c41d7d7b663">
           <attributes>
             <nvpair name="clone_max" value="2" id="ed79d6c0-f65b-4315-93d3-bebb
71c54515"/>
             <nvpair name="clone_node_max" value="1" id="f024f1e4-d455-442b-95d7-d4c959016094"/>
           </attributes>
         </instance_attributes>
         <primitive id="stonithclone" class="stonith" type="external/ssh" provid
er="heartbeat">
           <operations>
             <op name="monitor" interval="5s" timeout="20s" prereq="nothing" id="4d1aee4e-16fd-495b-8b96-1a4fcf4fca91"/>
             <op name="start" timeout="20s" prereq="nothing" id="6c78b7a3-6468-4f63-96a8-f176fc4b49d7"/>
           </operations>
           <instance_attributes id="8a6ec4ad-747c-4412-b8f4-267e7610eb68">
             <attributes>
               <nvpair name="hostlist" value="apolo-master,apolo-slave" id="0a818d2a-8bf8-466f-91fc-65ac156306c3"/>
             </attributes>
           </instance_attributes>
         </primitive>
       </clone>
       <master_slave id="ms-drbd0">
         <meta_attributes id="ma-ms-drbd0">
           <attributes>
             <nvpair id="ma-ms-drbd0-1" name="clone_max" value="2"/>
             <nvpair id="ma-ms-drbd0-2" name="clone_node_max" value="1"/>
             <nvpair id="ma-ms-drbd0-3" name="master_max" value="1"/>
             <nvpair id="ma-ms-drbd0-4" name="master_node_max" value="1"/>
             <nvpair id="ma-ms-drbd0-5" name="notify" value="yes"/>
             <nvpair id="ma-ms-drbd0-6" name="globally_unique" value="false"/>
             <nvpair name="target_role" id="ma-ms-drbd0-7" value="#default"/>
           </attributes>
         </meta_attributes>
         <primitive id="drbd0" class="ocf" provider="heartbeat" type="drbd">
           <instance_attributes id="ia-drbd0">
             <attributes>
               <nvpair id="ia-drbd0-1" name="drbd_resource" value="drbd0"/>
             </attributes>
           </instance_attributes>
         </primitive>
       </master_slave>
       <primitive class="ocf" provider="heartbeat" type="Filesystem" id="fs0">
         <meta_attributes id="ma-fs0">
           <attributes>
             <nvpair name="target_role" id="ma-fs0-1" value="#default"/>
           </attributes>
         </meta_attributes>
         <instance_attributes id="ia-fs0">
           <attributes>
             <nvpair id="ia-fs0-1" name="fstype" value="ext3"/>
             <nvpair id="ia-fs0-2" name="directory" value="/home"/>
             <nvpair id="ia-fs0-3" name="device" value="/dev/drbd0"/>
           </attributes>
         </instance_attributes>
       </primitive>
     </resources>
     <constraints>
       <rsc_location id="rsc_location_group_1" rsc="group_1">
         <rule id="prefered_location_group_1" score="100">
           <expression attribute="#uname" id="prefered_location_group_1_expr" operation="eq" value="apolo-master"/>
         </rule>
       </rsc_location>
       <rsc_location id="drbd0-placement-1" rsc="ms-drbd0">
         <rule id="drbd0-rule-1" score="-INFINITY">
           <expression id="exp-01" value="apolo-master" attribute="#uname" operation="ne"/>
           <expression id="exp-02" value="apolo-slave" attribute="#uname" operat
ion="ne"/>
         </rule>
       </rsc_location>
       <rsc_order id="drbd0_before_fs0" from="fs0" action="start" to="ms-drbd0"to_action="promote"/>
     </constraints>
   </configuration>