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9.2.3. Examples of Three-Node and Two-Node Configurations
Refer to the examples that follow for comparison between a three-node and a two-node configuration.
Example 9.1. Three-node Cluster Configuration
<cluster name="mycluster" config_version="3">
<cman/>
<clusternodes>
<clusternode name="node-01.example.com" nodeid="1">
<fence>
<method name="APC">
<device name="apc" port="1"/>
</method>
</fence>
</clusternode>
<clusternode name="node-02.example.com" nodeid="2">
<fence>
<method name="APC">
<device name="apc" port="2"/>
</method>
</fence>
</clusternode>
<clusternode name="node-03.example.com" nodeid="3">
<fence>
<method name="APC">
<device name="apc" port="3"/>
</method>
</fence>
</clusternode>
</clusternodes>
<fencedevices>
<fencedevice agent="fence_apc" ipaddr="apc_ip_example" login="login_example" name="apc" passwd="password_example"/>
</fencedevices>
<rm>
<failoverdomains>
<failoverdomain name="example_pri" nofailback="0" ordered="1" restricted="0">
<failoverdomainnode name="node-01.example.com" priority="1"/>
<failoverdomainnode name="node-02.example.com" priority="2"/>
<failoverdomainnode name="node-03.example.com" priority="3"/>
</failoverdomain>
</failoverdomains>
<resources>
<ip address="127.143.131.100" monitor_link="yes" sleeptime="10">
<fs name="web_fs" device="/dev/sdd2" mountpoint="/var/www" fstype="ext3">
<apache config_file="conf/httpd.conf" name="example_server" server_root="/etc/httpd" shutdown_wait="0"/>
</fs>
</ip>
</resources>
<service autostart="0" domain="example_pri" exclusive="0" name="example_apache" recovery="relocate">
<fs ref="web_fs"/>
<ip ref="127.143.131.100"/>
<apache ref="example_server"/>
</service>
<service autostart="0" domain="example_pri" exclusive="0" name="example_apache2" recovery="relocate">
<fs name="web_fs2" device="/dev/sdd3" mountpoint="/var/www" fstype="ext3"/>
<ip address="127.143.131.101" monitor_link="yes" sleeptime="10"/>
<apache config_file="conf/httpd.conf" name="example_server2" server_root="/etc/httpd" shutdown_wait="0"/>
</service>
</rm>
</cluster>
Example 9.2. Two-node Cluster Configuration
<cluster name="mycluster" config_version="3">
<cman two_node="1" expected_votes="1"/>
<clusternodes>
<clusternode name="node-01.example.com" nodeid="1">
<fence>
<method name="APC">
<device name="apc" port="1"/>
</method>
</fence>
</clusternode>
<clusternode name="node-02.example.com" nodeid="2">
<fence>
<method name="APC">
<device name="apc" port="2"/>
</method>
</fence>
</clusternodes>
<fencedevices>
<fencedevice agent="fence_apc" ipaddr="apc_ip_example" login="login_example" name="apc" passwd="password_example"/>
</fencedevices>
<rm>
<failoverdomains>
<failoverdomain name="example_pri" nofailback="0" ordered="1" restricted="0">
<failoverdomainnode name="node-01.example.com" priority="1"/>
<failoverdomainnode name="node-02.example.com" priority="2"/>
</failoverdomain>
</failoverdomains>
<resources>
<ip address="127.143.131.100" monitor_link="yes" sleeptime="10">
<fs name="web_fs" device="/dev/sdd2" mountpoint="/var/www" fstype="ext3">
<apache config_file="conf/httpd.conf" name="example_server" server_root="/etc/httpd" shutdown_wait="0"/>
</fs>
</ip>
</resources>
<service autostart="0" domain="example_pri" exclusive="0" name="example_apache" recovery="relocate">
<fs ref="web_fs"/>
<ip ref="127.143.131.100"/>
<apache ref="example_server"/>
</service>
<service autostart="0" domain="example_pri" exclusive="0" name="example_apache2" recovery="relocate">
<fs name="web_fs2" device="/dev/sdd3" mountpoint="/var/www" fstype="ext3"/>
<ip address="127.143.131.101" monitor_link="yes" sleeptime="10"/>
<apache config_file="conf/httpd.conf" name="example_server2" server_root="/etc/httpd" shutdown_wait="0"/>
</service>
</rm>
</cluster>
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