CentOS 6
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Pacemaker - Cluster Configuration for httpd
2011/07/15
 
Configure Clustering for httpd. Stop httpd on both Hosts.
This example shows to configure on the environment like follows.
(1)  www01.srv.world  ( eth0 [192.168.1.60],  eth1 [10.0.0.60] )
(2)  www02.srv.world  ( eth0 [192.168.1.61],  eth1 [10.0.0.61] )
This example uses eth0 for inter-connection and uses eth1 for service provider.
[1]
[2] Enable server-status on httpd. Set it on both Hosts.
[root@www01 ~]#
vi /etc/httpd/conf/httpd.conf
# line 921-926: uncomment and chnage acceses permittion

<Location /server-status>
   SetHandler server-status
   Order deny,allow
   Deny from all
   Allow from
127.0.0.1 10.0.0.0/24

</Location>
[3] Configure Clustering. Set it on a Host.
[root@www01 ~]#
crm configure

crm(live)configure#
primitive httpd ocf:heartbeat:apache \

>
params configfile="/etc/httpd/conf/httpd.conf" \

>
port="80" \

>
op start interval="0s" timeout="60s" \

>
op monitor interval="5s" timeout="20s" \

>
op stop interval="0s" timeout="60s"

crm(live)configure#
group webserver vip httpd
# create a group

crm(live)configure#
show
# confirm settings

node www01.srv.world
node www02.srv.world
primitive httpd ocf:heartbeat:apache \
        params configfile="/etc/httpd/conf/httpd.conf" port="80" \
        op start interval="0s" timeout="60s" \
        op monitor interval="5s" timeout="20s" \
        op stop interval="0s" timeout="60s"
primitive vip ocf:heartbeat:IPaddr2 \
        params ip="10.0.0.100" cidr_netmask="24" \
        op start interval="0s" timeout="60s" \
        op monitor interval="5s" timeout="20s" \
        op stop interval="0s" timeout="60s"
group webserver vip httpd
property $id="cib-bootstrap-options" \
        dc-version="1.1.2-f059ec7ced7a86f18e5490b67ebf4a0b963bccfe" \
        cluster-infrastructure="openais" \
        expected-quorum-votes="2" \
        no-quorum-policy="ignore" \
        stonith-enabled="false"
rsc_defaults $id="rsc-options" \
        resource-stickiness="INFINITY" \
        migration-threshold="1"
crm(live)configure#
commit
# enable settings

crm(live)configure#
exit

bye
[4] Make sure status with crm_mon, then httpd starts on a Host.
[root@www01 ~]#
crm_mon

============
Last updated: Fri Jul 15 21:03:50 2011
Stack: openais
Current DC: www01.srv.world - partition with quorum
Version: 1.1.2-f059ec7ced7a86f18e5490b67ebf4a0b963bccfe
2 Nodes configured, 2 expected votes
1 Resources configured.
============

Online: [ www01.srv.world www02.srv.world ]

 Resource Group: webserver
     vip        (ocf::heartbeat:IPaddr2):       Started www01.srv.world
     httpd      (ocf::heartbeat:apache):        Started www01.srv.world
[5] Access to Virtual IP address, then active Host answers like follows.
[6] Stop httpd forcely on active Host, then swith to www02.srv.world an once like follows.
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