[Linux-cluster] RHEL/CentOS-6 HA NFS Configuration Question

[Randy Zagar]

To All,

Looks like I got nicked by Occam's Razor when I "simplified" my cluster 
config file... :-)   A "less simplified" version is below.

My question still stands, however.  What does "cluster.conf" look like 
if you're trying to deploy a "highly available" NFS configuration.  And, 
again, by "highly available" I mean that NFS Clients never get the 
dreaded "stale nfs file handle" message unless the entire cluster has 
failed.

-RZ

p.s.  A better, but still simplified, cluster.conf for EL5.

    <?xml version="1.0"?>
    <cluster alias="ha-nfs-el5" config_version="357" name="ha-nfs-el5">
         <fence_daemon clean_start="0" post_fail_delay="0" post_join_delay="3"/>
         <clusternodes>
         	<clusternode name="node01.arlut.utexas.edu" nodeid="1" votes="1">
         		<fence>
         			<method name="1">
         				<device name="node01-ilo"/>
         			</method>
         			<method name="2">
         				<device name="sanbox01" port="0"/>
         			</method>
         		</fence>
         	</clusternode>
         	<clusternode name="node02.arlut.utexas.edu" nodeid="2" votes="1">
         		<fence>
         			<method name="1">
         				<device name="node02-ilo"/>
         			</method>
         			<method name="2">
         				<device name="sanbox02" port="0"/>
         			</method>
         		</fence>
         	</clusternode>
         	<clusternode name="node03.arlut.utexas.edu" nodeid="3" votes="1">
         		<fence>
         			<method name="1">
         				<device name="node03-ilo"/>
         			</method>
         			<method name="2">
         				<device name="sanbox03" port="0"/>
         			</method>
         		</fence>
         	</clusternode>
         </clusternodes>
         <cman/>
         <fencedevices>
         	<fencedevice agent="fence_sanbox2" ipaddr="sanbox01.arlut.utexas.edu" login="admin" name="sanbox01" passwd="password"/>
         	<fencedevice agent="fence_sanbox2" ipaddr="sanbox02.arlut.utexas.edu" login="admin" name="sanbox02" passwd="password"/>
         	<fencedevice agent="fence_sanbox2" ipaddr="sanbox03.arlut.utexas.edu" login="admin" name="sanbox03" passwd="password"/>
         	<fencedevice agent="fence_ilo" hostname="node01-ilo" login="Administrator" name="node01-ilo" passwd="DUMMY"/>
         	<fencedevice agent="fence_ilo" hostname="node02-ilo" login="Administrator" name="node02-ilo" passwd="DUMMY"/>
         	<fencedevice agent="fence_ilo" hostname="node03-ilo" login="Administrator" name="node03-ilo" passwd="DUMMY"/>
         </fencedevices>
         <rm>
         	<failoverdomains>
         		<failoverdomain name="nfs1-domain" nofailback="1" ordered="1" restricted="1">
         			<failoverdomainnode name="node01.arlut.utexas.edu" priority="1"/>
         			<failoverdomainnode name="node02.arlut.utexas.edu" priority="2"/>
         			<failoverdomainnode name="node03.arlut.utexas.edu" priority="3"/>
         		</failoverdomain>
         		<failoverdomain name="nfs2-domain" nofailback="1" ordered="1" restricted="1">
         			<failoverdomainnode name="node01.arlut.utexas.edu" priority="3"/>
         			<failoverdomainnode name="node02.arlut.utexas.edu" priority="1"/>
         			<failoverdomainnode name="node03.arlut.utexas.edu" priority="2"/>
         		</failoverdomain>
         		<failoverdomain name="nfs3-domain" nofailback="1" ordered="1" restricted="1">
         			<failoverdomainnode name="node01.arlut.utexas.edu" priority="2"/>
         			<failoverdomainnode name="node02.arlut.utexas.edu" priority="3"/>
         			<failoverdomainnode name="node03.arlut.utexas.edu" priority="1"/>
         		</failoverdomain>
         	</failoverdomains>
         	<resources>
         		<ip address="192.168.1.1" monitor_link="1"/>
         		<ip address="192.168.1.2" monitor_link="1"/>
         		<ip address="192.168.1.3" monitor_link="1"/>
         		<fs device="/dev/cvg00/volume01" force_fsck="0" force_unmount="1" fsid="49388" fstype="ext3" mountpoint="/lvm/volume01" name="volume01" self_fence="0"/>
         		<fs device="/dev/cvg00/volume02" force_fsck="0" force_unmount="1" fsid="58665" fstype="ext3" mountpoint="/lvm/volume01" name="volume01" self_fence="0"/>
         		<fs device="/dev/cvg00/volume03" force_fsck="0" force_unmount="1" fsid="61028" fstype="ext3" mountpoint="/lvm/volume01" name="volume01" self_fence="0"/>
         		<nfsclient allow_recover="1" name="local-subnet" options="rw,insecure" target="192.168.1.0/24"/>
         	</resources>
         	<service autostart="1" domain="nfs1-domain" exclusive="0" name="nfs1" nfslock="1" recovery="relocate">
         		<ip ref="192.168.1.1">
         			<fs __independent_subtree="1" ref="volume01">
         				<nfsexport name="nfs-volume01">
         					<nfsclient name=" " ref="local-subnet"/>
         				</nfsexport>
         			</fs>
         		</ip>
         	</service>
         	<service autostart="1" domain="nfs2-domain" exclusive="0" name="nfs2" nfslock="1" recovery="relocate">
         		<ip ref="192.168.1.2">
         			<fs __independent_subtree="1" ref="volume02">
         				<nfsexport name="nfs-volume02">
         					<nfsclient name=" " ref="local-subnet"/>
         				</nfsexport>
         			</fs>
         		</ip>
         	</service>
         	<service autostart="1" domain="nfs3-domain" exclusive="0" name="nfs3" nfslock="1" recovery="relocate">
         		<ip ref="192.168.1.3">
         			<fs __independent_subtree="1" ref="volume03">
         				<nfsexport name="nfs-volume03">
         					<nfsclient name=" " ref="local-subnet"/>
         				</nfsexport>
         			</fs>
         		</ip>
         	</service>
         </rm>
    </cluster>

-- 
Randy Zagar                               Sr. Unix Systems Administrator
E-mail: zagar at arlut.utexas.edu            Applied Research Laboratories
Phone: 512 835-3131                       Univ. of Texas at Austin

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