Hello Pacemaker guys, I am doing a proof of concept of active/passive HA cluster on RHEL 6.5 Since the customer who I am working for will finally get support from Red Hat. Therefore, I am trying to comply with Red Hat Documentation. as stated in several places that on RHEL 6.5 - pacemaker is now supported with CMAN stack.
I started configuring things by following steps describe in https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Configuring_the_Red_Hat_High_Availability_Add-On_with_Pacemaker/ap-configfile-HAAR.html document. This document provides configuration steps by using pcs command. no ccs or crmsh commands at all. After I have created cluster. I can start cluster services on node1 but cannot start it on node2 - there error is /etc/cluster/cluster.conf is not there on node2 pcs cluster start Starting Cluster... Starting cluster: Checking if cluster has been disabled at boot... [ OK ] Checking Network Manager... [ OK ] Global setup... [ OK ] Loading kernel modules... [ OK ] Mounting configfs... [ OK ] Starting cman... xmlconfig cannot find /etc/cluster/cluster.conf [FAILED] Stopping cluster: Leaving fence domain... [ OK ] Stopping gfs_controld... [ OK ] Stopping dlm_controld... [ OK ] Stopping fenced... [ OK ] Stopping cman... [ OK ] Unloading kernel modules... [ OK ] Unmounting configfs... [ OK ] Error: unable to start cman pcs cluster status command output on node1 shows "cman" stack pcs cluster status Cluster Status: Last updated: Mon Jun 16 15:31:53 2014 Last change: Mon Jun 16 14:23:04 2014 via crmd on rhcs1.localdomain Stack: cman Current DC: rhcs1.localdomain - partition with quorum Version: 1.1.10-14.el6-368c726 2 Nodes configured 0 Resources configured PCSD Status: Error: no nodes found in corosync.conf but from the aforementioned document from Red Hat. the stack is corosync. [root@z1 ~]# *pcs cluster status* Cluster Status: Last updated: Thu Jul 25 13:01:26 2013 Last change: Thu Jul 25 13:04:45 2013 via crmd on z2.example.com Stack: corosync Current DC: z2.example.com (2) - partition with quorum Version: 1.1.10-5.el7-9abe687 2 Nodes configured 0 Resources configured from the 2 incidents above, I am not sure whether I am on the right path. My PoC objectives are to 1. configure Active/Passive HA cluster on RHEL 6.5 2. Get Full Support from Red Hat on both OS and High Availability Add-on 3. choose HA Cluster software and stacks which has a future. I expect to have more than 5 years support from Red Hat and Community. I found this quick start guide for redhat on cluster labs http://clusterlabs.org/quickstart-redhat.html I am not sure whether I should use ccs command to create cluster first and use pcs to manage resource. on more question, I see corosync will be supported in RHEL7. Can I use only corosync with pacemaker in RHEL 6.5? Will I get support from Red Hat ? Could you guys please help advise? Thanks a lot. -- Thanachit Wichianchai / IT Specialist - RHCSA, RHCE +66 87 696 5522/ thanachit [at] acm.org http://hi.im/thanachit [image: Google Plus] <https://plus.google.com/u/0/102459307371925233265/posts> [image: Linkedin] <http://th.linkedin.com/in/thanachit>
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