[Pacemaker] pacemaker with CMAN on RHEL 6.5
Thanachit Wichianchai
thanachit.w at googlemail.com
Mon Jun 16 19:58:42 CEST 2014
Hi, It is EL 6.5. For Version: 1.1.10-5.el7-9abe687 it is the output posted in redhat document. --
>>>> 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
Thank you very much.
Thanachit
Sent from my iPad
> On 16 มิ.ย. 2557, at 23:24, Digimer <lists at alteeve.ca> wrote:
>
> The subject says 6.5, so we need Thanachit to clarify.
>
> If EL7, then no, there is no cman. You can use pcsd to form the cluster initially, but also, that version should not attempt to start cman at all, so I am still thinking it is RHEL/CentOS 6.
>
>> On 16/06/14 12:20 PM, emmanuel segura wrote:
>> From the previous output i seen this "Version: 1.1.10-5.el7-9abe687",
>> so my question is "cman is used on redhat7?"
>>
>> 2014-06-16 18:10 GMT+02:00 Digimer <lists at alteeve.ca>:
>>> 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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>>>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>>>> Bugs: http://bugs.clusterlabs.org
>>>
>>>
>>> --
>>> Digimer
>>> Papers and Projects: https://alteeve.ca/w/
>>> What if the cure for cancer is trapped in the mind of a person without
>>> access to education?
>>>
>>>
>>> _______________________________________________
>>> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
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>>>
>>> Project Home: http://www.clusterlabs.org
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>>> Bugs: http://bugs.clusterlabs.org
>
>
> --
> Digimer
> Papers and Projects: https://alteeve.ca/w/
> What if the cure for cancer is trapped in the mind of a person without access to education?
>
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
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