Hi guys First sorry if something is unclear, English isn’t my natural language but I still improving it. It seems to be that I’ve a problem in understanding the fencing concept (RHCS 6.2) or I do something wrong in the configuration. Let me explain the details. I want to setup a 2 node Cluster for a simple active/passive Scenario with SAN-Storage and Quorum Device. According to my understanding For a 2 Node Cluster it’s necessary to set "cman two_node="1" expected_votes="1". So every System has one vote and but one must be available to be quorate. What is if I want to have an extra Qurom-Device, provided by SAN Storage. In this setup "two_node=1" is not necessary and expected_votes=1 must change to 2. node1+node2+quorum = 3. So if node 2 goes down we have 2 votes (node1+quorum disk) and the cluster is still quorate and can still provide Services. On the other site the quorum disk is available at both system – so every system has 2 votes in sum 4, that confused me a little bit. <cluster> .. <cman expected_votes="3" /> <quorumd label="qdisk" /> .. </cluster> Q: In which situation will node1<->node2 fencing them. · If the hearbeat-LAN disconnect? · If Qurom-Disk went offline? · If both goes offline? In my understanding of the concept one of both can be down and a node will be fenced if both goes offline. Okay – this was the theory and my understanding of it. In praxis my nodes shoot themselves in the head. Network-Setup VLAN10 - 192.168.8.0/24 - Backup VLAN11 - 192.168.100.0/23 - Production VLAN12 - 192.168.1.0/24 - Cluster / Heartbeat only VLAN13 - 192.168.10.0/24 – iLO Management System-Setup ha-node1 (rhel 6.2) eth1 - 192.168.8.1 eth2 - 192.168.100.1 eth3 - 192.168.1.1 hp-ilo 192.168.10.1 ha-node2 (rhel 6.2) eth1 - 192.168.8.2 eth2 - 192.168.100.2 eth3 – 192.168.1.3 hp-ilo 192.168.10.2 /etc/cluster/cluster.conf (http://pastebin.com/nWhnbk73) <?xml version="1.0"?> <cluster config_version="4" name="argus"> <fence_daemon/> <clusternodes> <clusternode name="ha-node1" nodeid="1"> <fence> <method name="ipmi"> <device action="reboot" name="impifence1"/> </method> </fence> </clusternode> <clusternode name="ha-node2" nodeid="2"> <fence> <method name="ipmi"> <device action="reboot" name="impifence2"/> </method> </fence> </clusternode> </clusternodes> <cman expected_votes="3" /> <fencedevices> <fencedevice agent="fence_ipmilan" auth="password" ipaddr="192.168.10.1" lanplus="1" login="rhcsfencing" name="impifence1" passwd="*********"/> <fencedevice agent="fence_ipmilan" auth="password" ipaddr="192.168.10.2" lanplus="1" login="rhcsfencing" name="impifence2" passwd="*********"/> </fencedevices> <rm> <failoverdomains/> <resources> <ip address="192.168.100.10" monitor_link="on" sleeptime="10"/> <ip address="192.168.8.49" monitor_link="on" sleeptime="10"/> <fs device="/dev/mapper/vg_dataP01-lv_argus" force_fsck="yes" fstype="ext4" mountpoint="/opt/argus" name="fsargus"/> <fs device="/dev/mapper/vg_dataP01-lv_mysql" force_fsck="yes" fstype="ext4" mountpoint="/var/lib/mysql" name="fsmysql"/> </resources> <service autostart="1" name="argus_prod" recovery="restart"> <ip ref="192.168.100.10"> <fs ref="fsmysql"> <script file="/etc/init.d/mysqld" name="mysqld"/> </fs> </ip> </service> <service autostart="1" name="argus_backup" recovery="restart"> <ip ref="192.168.8.49"/> </service> </rm> <quorumd label="qdisk" /> </cluster> /var/log/messages http://pastebin.com/5G7n56bU Thx Chris -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
