[Pacemaker] pacemaker with CMAN on RHEL 6.5

[emmanuel segura]

If you are using redhat 7, you sould use corosync+pacemaker as cluster stack


2014-06-16 13:13 GMT+02:00 Thanachit Wichianchai <thanachit.w at googlemail.com
>:

> 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 at 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
>
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>
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