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I have an existing CentOS-5 cluster I've configured for
High-Availability NFS (v3). Everything is working fine. I've
included a simplified cluster.conf file below. I originally started with 3 file servers that were not clustered. I converted to a clustered configuration where my NFS Clients never get "stale nfs" error messages. When a node failed, all NFS exports (and their associated IP address) would move to another system faster than my clients could time out. I understand that changes to the portmapper in EL6 and NFSv4 make it much more difficult to configure HA-NFS and, so far, I have not seen any good documentation on how to configure a HA-NFS configuration in EL6. Does anyone have any suggestions, or links to documentation that you can send me? -RZ p.s. Simplified cluster.conf file 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-cvg00-brazos02"> <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-sdd01-data02"> <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"> <nfsclient name=" " ref="local-subnet"/> </nfsexport> </fs> </ip> </service> </rm> </cluster> -- Randy Zagar Sr. Unix Systems Administrator E-mail: zagar@xxxxxxxxxxxxxxxx Applied Research Laboratories Phone: 512 835-3131 Univ. of Texas at Austin |
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