[Pacemaker] pacemaker with CMAN on RHEL 6.5

[Digimer]

You need to setup a skeleton cluster.conf file. You can use the 'ccs' 
tool, here is an example (I use for my cluster, adjust the names to suit):

ccs -f /etc/cluster/cluster.conf --createcluster an-anvil-04
ccs -f /etc/cluster/cluster.conf --setcman two_node="1" expected_votes="1"
ccs -f /etc/cluster/cluster.conf --addnode an-a04n01.alteeve.ca
ccs -f /etc/cluster/cluster.conf --addnode an-a04n02.alteeve.ca
ccs -f /etc/cluster/cluster.conf --addfencedev pcmk agent=fence_pcmk
ccs -f /etc/cluster/cluster.conf --addmethod pcmk-redirect 
an-a04n01.alteeve.ca
ccs -f /etc/cluster/cluster.conf --addmethod pcmk-redirect 
an-a04n02.alteeve.ca
ccs -f /etc/cluster/cluster.conf --addfenceinst pcmk 
an-a04n01.alteeve.ca pcmk-redirect port=an-a04n01.alteeve.ca
ccs -f /etc/cluster/cluster.conf --addfenceinst pcmk 
an-a04n02.alteeve.ca pcmk-redirect port=an-a04n02.alteeve.ca
ccs -f /etc/cluster/cluster.conf --setfencedaemon post_join_delay="30"

hth

On 16/06/14 07:13 AM, Thanachit Wichianchai wrote:
> 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 onz2.example.com  <http://z2.example.com>
>   Stack: corosync
>   Current DC:z2.example.com  <http://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 labshttp://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 <mailto:thanachit%20[at]%20acm.org>
>
> http://hi.im/thanachit
>
> Google Plus <https://plus.google.com/u/0/102459307371925233265/posts>
> Linkedin <http://th.linkedin.com/in/thanachit>
>
>
>
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>
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>


-- 
Digimer
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