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Hello, I am setting up a 2 node redhat cluster to test failover as
part of testing effort in my company for the iscsi product we
develop. I have a iscsi target which is my cluster shared storage. Downloaded and compiled the open source redhat cluster and
installed the cluster components in both the nodes. Logged-into the iscsi target, created a gfs filesystem and
mounted the lun on both the nodes. Created the cluster.conf using system-config-cluster gui and
below that cluster.conf <?xml version="1.0"?> <cluster config_version="8"
name="alpha_cluster"> <fence_daemon post_fail_delay="0"
post_join_delay="3"/> <clusternodes> <clusternode
name="node1" votes="1"> <fence> <method
name="1"> <device
name="node1_fence"/> </method> </fence> </clusternode> <clusternode
name="node2" votes="1"> <fence> <method
name="1"> <device
name="node2_fence"/> </method> </fence> </clusternode> </clusternodes> <cman expected_votes="1"
two_node="1"/> <fencedevices> <fencedevice
agent="fence_ilo" hostname="admin" login="admin" name="node1_fence"
passwd="admin"/> <fencedevice
agent="fence_ilo" hostname="admin" login="admin" name="node2_fence"
passwd="admin"/> </fencedevices> <rm> <failoverdomains> <failoverdomain
name="failover" ordered="1" restricted="0"> <failoverdomainnode
name="node1" priority="1"/> <failoverdomainnode
name="node2" priority="2"/> </failoverdomain> </failoverdomains> <resources> <ip
address="172.40.2.119" monitor_link="1"/> <clusterfs
device="/dev/mapper/vg0-lv" force_unmount="0" fsid="10938"
fstype="gfs" mountpoint="/test1" name="lun" options=""/> </resources> <service autostart="1"
domain="failover" name="iscsi_ip"> <ip
ref="172.40.2.119"/> </service> <service autostart="1"
domain="failover" name="iscsi_lun"> <clusterfs
ref="lun"/> </service> </rm> </cluster> Using the cluster ip address (172.40.2.119), I was able to
do an nfs mount of the shared lun from a 3rd machine. Started an
infinite ls on that lun. To simulate failover, I just powered-down the node1 and
hoping to see the read io stop but resume via the node2. But, I see the
following error message on the node 2. Mar 9 12:14:49 node2 fenced[7422]: fence "node1"
failed Mar 9 12:14:54 node2 fenced[7422]: fencing node
"node1" Mar 9 12:14:54 node2 fenced[7422]: agent
"fence_ilo" reports: Can't call method "configure" on an undefined value at
/sbin/fence_ilo line 169, <> line 4. Mar 9 12:14:54 node2 fenced[7422]: fence "node1"
failed Mar 9 12:14:59 node2 fenced[7422]: fencing node
"node1" Mar 9 12:14:59 node2 fenced[7422]: agent
"fence_ilo" reports: Can't call method "configure" on an undefined value at
/sbin/fence_ilo line 169, <> line 4. Seems like I am not doing something correct with respect to
fencing. Can I setup cluster without fencing first of all? I don't have any of the fencing power devices. In that case,
how do I do fencing? Any help would be greatly appreciated. Thanks, Sai Logan _________________________________________________________________________________________________________________ This message and any attachment are confidential and may be privileged or otherwise protected from disclosure. If you are not the intended recipient please telephone or e-mail the sender and delete this message and all attachments from your system - ServerEngines LLC |
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