Pacemaker Cluster Web server Project RHEL 6.0

                  

Install Linux High-Availability Cluster tool "Pacemaker".

This example shows to configure on the environment like follows.

(1)  www01.server.world  ( eth0 [192.168.1.60],  eth1 [10.0.0.60] )

(2)  www02.server.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] Install Pacemaker on both Hosts.

[root@www01 ~]# yum -y install pacemaker

[2] Create an authkeys that is used for inter-connection. Configure it on both Hosts.

[root@www01 ~]# vim /etc/ha.d/authkeys

auth 1
1 sha1 secret

[root@www01 ~]# Chmod 600 /etc/ha.d/authkeys

[3] Configure Corosync on both Hosts.

[root@www01 ~]# vim /etc/corosync/corosync.conf.example /etc/corosync/corosync.conf

[root@www01 ~]# vim /etc/corosync/corosync.conf

compatibility: whitetank             

# add like follows.

aisexec {

        user: root

        group: root

}

service {

        name: pacemaker

        ver: 0

        use_mgmtd: yes

}

totem {

        version: 2

        secauth: off

        threads: 0

        interface {

                ringnumber: 0

# Specify network address for inter-connection

                bindnetaddr: 192.168.1.0

                mcastaddr: 226.94.1.1

                mcastport: 5405

        }

}

logging {

        fileline: off

        to_stderr: no

        to_logfile: yes

        to_syslog: yes

        logfile: /var/log/cluster/corosync.log

        debug: off

        timestamp: on

        logger_subsys {

                subsys: AMF

                debug: off

        }

}

amf {

        mode: disabled

}

[root@www01 ~]# chown -R hacluster. /var/log/cluster

[root@www01 ~]#  /etc/rc.d/init.d/corosync start

Starting Corosync Cluster Engine (corosync): [ OK ]

[root@www01 ~]# chkconfig corosync on

[4] Execute crm_mon on a Host, then it's OK if the result like follows is shown. Basic settings is done for Pacemaker. It's necessarry to configure more if you'd like to configure a service as Cluster. See next Step.

[root@www01 ~]# crm_mon

============

Last updated: Fri Jul 15 20:56:49 2011

Stack: openais

Current DC: www01.server.world - partition with quorum

Version: 1.1.2-f059ec7ced7a86f18e5490b67ebf4a0b963bccfe

2 Nodes configured, 2 expected votes

0 Resources configured.

============

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

[root@www01 ~]# crm configure property no-quorum-policy="ignore" stonith-enabled="false"

[root@www01 ~]# crm configure rsc_defaults resource-stickiness="INFINITY" migration-threshold="1"

[5] If you'd like to clear all settings of pacemaker, Do like follows.

[root@www01 ~]# /etc/rc.d/init.d/corosync stop # stop

[root@www01 ~]# rm -f /var/lib/heartbeat/crm/* # remove all

[root@www01 ~]# /etc/rc.d/init.d/corosync start # start

Pacemaker - Set Virtual IP Address

This example shows to configure on the environment like follows.

(1)  www01.server.world  ( eth0 [192.168.1.60],  eth1 [10.0.0.60] )

(2)  www02.server.world  ( eth0 [192.168.1.61],  eth1 [10.0.0.61] )

This example uses eth0 for inter-connection and uses eth1 for service provider. And set [10.0.0.100] for Virtual IP Address as an example.

[1] Configure Virtual IP Address on a Host. www01.server.world

[root@www01 ~]# crm configure

crm(live)configure# primitive vip ocf:heartbeat:IPaddr2 \

> params ip="10.0.0.100" \                                                     # Virtual IP Address

> nic="eth1" \

> cidr_netmask="24" \

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

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

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

crm(live)configure# show                                                       # make sure

node www01.server.world

node www02.server.world

primitive vip ocf:heartbeat:IPaddr2 \

        params ip="10.0.0.100" nic="eth1" cidr_netmask="24" \

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

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

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

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

[3] Execute crm_mon and make sure status.

[root@www01 ~]# crm_mon

============

Last updated: Fri Jul 15 20:59:16 2011

Stack: openais

Current DC: www01.server.world - partition with quorum

Version: 1.1.2-f059ec7ced7a86f18e5490b67ebf4a0b963bccfe

2 Nodes configured, 2 expected votes

1 Resources configured.

============

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

vip     (ocf::heartbeat:IPaddr2):       Started www01.server.world

[4] Make sure to ping to Virtual IP Address if it answers.

[root@www01 ~]# ping 10.0.0.100

PING 10.0.0.100 (10.0.0.100) 56(84) bytes of data.

64 bytes from 10.0.0.100: icmp_seq=1 ttl=64 time=0.016 ms

64 bytes from 10.0.0.100: icmp_seq=2 ttl=64 time=0.008 ms

64 bytes from 10.0.0.100: icmp_seq=3 ttl=64 time=0.009 ms

64 bytes from 10.0.0.100: icmp_seq=4 ttl=64 time=0.025 ms

64 bytes from 10.0.0.100: icmp_seq=5 ttl=64 time=0.014 ms

64 bytes from 10.0.0.100: icmp_seq=6 ttl=64 time=0.008 ms

--- 10.0.0.100 ping statistics ---

6 packets transmitted, 6 received, 0% packet loss, time 5149ms

rtt min/avg/max/mdev = 0.008/0.013/0.025/0.006 ms

Pacemaker - Cluster Configuration for httpd

Configure Clustering for httpd. Stop httpd on both Hosts.

This example shows to configure on the environment like follows.

(1)  www01.server.world  ( eth0 [192.168.1.60],  eth1 [10.0.0.60] )

(2)  www02.server.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]  Set Virtual IP Address first. (done above)

[2]  Enable server-status on httpd. Set it on both Hosts.

[root@www01 ~]# vim/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.server.world

node www02.server.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]Start the below services on both the hosts

Node1

[root@www01]# /etc/init.d/httpd restart

[root@www01]# chkconfig httpd on

[root@www01]# /etc/init.d/corosync restart

Node2

[root@www02]# /etc/init.d/httpd restart

[root@www02]# chkconfig httpd on

[root@www02]# /etc/init.d/corosync restart

[5] 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.server.world - partition with quorum

Version: 1.1.2-f059ec7ced7a86f18e5490b67ebf4a0b963bccfe

2 Nodes configured, 2 expected votes

1 Resources configured.

============

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

 Resource Group: webserver

     vip        (ocf::heartbeat:IPaddr2):       Started www01.server.world

     httpd      (ocf::heartbeat:apache):        Started www01.server.world

[6] Access to Virtual IP address, then active Host answers like follows.

[7] Stop httpd forcely (shutdown the system) on active Host www01.server.world , then swith to www02.server.world an once like follows.

 

Pacemaker - Cluster Configuration for Vsftpd

Configure Clustering for Vsftpd. Stop Vsftpd on both Hosts.

This example shows to configure on the environment like follows.

(1)  www01.server.world  ( eth0 [192.168.1.60],  eth1 [10.0.0.60] )

(2)  www02.server.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]  Set Virtual IP Address first. (Like above) if the same node1 you going to use you should chage vip to vip1 in all area

[2] Configure Clustering. Set it on a Host. By the way, if you'd like to configure clustering for ProFTPD or Pure-FTPd, configuration is the same with follows. Simply replace "vsftpd" to "proftpd" or "pure-ftpd" on following config.

[root@www01 ~]# crm configure

crm(live)configure# primitive vsftpd lsb:vsftpd \

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

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

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

crm(live)configure# group ftpserver vip vsftpd                                              # create a group

crm(live)configure# show                                                                               # confirm settings

node www01.server.world

node www02.server.world

primitive vip ocf:heartbeat:IPaddr2 \

        params ip="10.0.0.100" nic="eth1" cidr_netmask="24" \

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

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

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

primitive vsftpd lsb:vsftpd \

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

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

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

group ftpserver vip vsftpd

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

[3] Make sure status with crm_mon, then Vsftpd starts on a Host.

[root@www01 ~]# crm_mon

============

Last updated: Fri Jul 15 21:12:09 2011

Stack: openais

Current DC: www01.server.world - partition with quorum

Version: 1.1.2-f059ec7ced7a86f18e5490b67ebf4a0b963bccfe

2 Nodes configured, 2 expected votes

1 Resources configured.

============

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

 Resource Group: ftpserver

     vip        (ocf::heartbeat:IPaddr2):       Started www01.server.world

     vsftpd     (lsb:vsftpd):   Started www01.server.world

[4] Access to Virtual IP address with FTP client, then active Host answers like follows.