[Pacemaker] CMAN nodes online

[Gopalakrishnan N]

Hey Guys,

The OS am running is CentOS 6.4 (64bit) and I have disabled IPtables and
SeLinux.

My goal is to make Apache Tomcat as HA. As a first step thought of testing
with Apache.

My network setup is like this,
Node1 is connected to switch
Note2 is connected to switch.

My cluster.conf file is as follows,
[root at test01 ~]# cat /etc/cluster/cluster.conf
<?xml version="1.0"?>
<cluster config_version="1" name="mycluster1">
  <logging debug="off"/>
  <clusternodes>
    <clusternode name="test01" nodeid="1">
      <fence>
        <method name="pcmk-redirect">
          <device name="pcmk" port="test01"/>
        </method>
      </fence>
    </clusternode>
    <clusternode name="test02" nodeid="2">
      <fence>
        <method name="pcmk-redirect">
          <device name="pcmk" port="test02"/>
        </method>
      </fence>
    </clusternode>
  </clusternodes>
  <fencedevices>
    <fencedevice name="pcmk" agent="fence_pcmk"/>
  </fencedevices>
</cluster>


And @some point of time am able to see both nodes are registered,
[root at test01 ~]# cman_tool nodes
Node  Sts   Inc   Joined               Name
   1   M    104   2013-09-17 02:01:11  test01
   2   M    108   2013-09-17 02:15:07  test02

And @sometimes with crm_mon -1, I get the following

[root at test01 ~]# crm_mon -1
Last updated: Tue Sep 17 02:47:27 2013
Last change: Tue Sep 17 00:42:43 2013 via crmd on test01
Stack: cman
Current DC: NONE
4 Nodes configured, 2 expected votes
0 Resources configured.


Node test01: UNCLEAN (offline)
Node test01.iopextech.com: UNCLEAN (offline)
Node test02: UNCLEAN (offline)
Node test02.iopextech.com: UNCLEAN (offline)

Thanks.




On Mon, Sep 16, 2013 at 8:40 PM, Florian Crouzat
<gentoo at floriancrouzat.net>wrote:

> Le 16/09/2013 14:18, Gopalakrishnan N a écrit :
>
>  Do I need to have a cross over cable between each node? Is it mandatory?
>>
>
> Nop it doesn't.
> In your case, I'd check the network architecture and/or firewalling
> regarding multicast. You probably either have wrong iptables and/or a
> switch dropping your multicast corosync ring(s).
>
> Also, please, as Andreas said: try to communicate with us in a more
> efficient way: more context, more informations and more output (pasted
> somewhere).
>
> We are happy to help people, but we don't have to waste our time trying to
> understand what these exact people doesn't tell us because they are lazy.
>
> ps: also use 'corosync-objctl' ; it's a good command to debug rings and
> configurations.
>
> Cheers,
> Florian.
>
>
>>
>> On Mon, Sep 16, 2013 at 8:01 PM, Gopalakrishnan N
>> <gopalakrishnan.an at gmail.com <mailto:gopalakrishnan.an@**gmail.com<gopalakrishnan.an at gmail.com>>>
>> wrote:
>>
>>     Again the when i restarted the pacemaker and cman not the nodes are
>>     not in online, back to square 1.
>>
>>     node1 shows only node1 online, and node2 says node2 online. I don't
>>     know what's happening in the background...
>>
>>     Any advice would be appreciated..
>>
>>     Thanks.
>>
>>
>>     On Mon, Sep 16, 2013 at 6:47 PM, Gopalakrishnan N
>>     <gopalakrishnan.an at gmail.com <mailto:gopalakrishnan.an@**gmail.com<gopalakrishnan.an at gmail.com>
>> >>
>>
>>     wrote:
>>
>>         Hi guys,
>>
>>         I got it, basically it tool some time to propogate and now two
>>         nodes are showing online...
>>
>>         Thanks.
>>
>>
>>         On Mon, Sep 16, 2013 at 6:39 PM, Gopalakrishnan N
>>         <gopalakrishnan.an at gmail.com
>>         <mailto:gopalakrishnan.an@**gmail.com<gopalakrishnan.an at gmail.com>>>
>> wrote:
>>
>>             I have configured CMAN as per the link
>>             http://clusterlabs.org/doc/en-**US/Pacemaker/1.1-plugin/html-
>> **single/Clusters_from_Scratch/**index.html#_configuring_cman<http://clusterlabs.org/doc/en-US/Pacemaker/1.1-plugin/html-single/Clusters_from_Scratch/index.html#_configuring_cman>but
>>             when I type cman_tools nodes only one node is online even
>>             thought the cluster.conf is propogated in other node as well.
>>
>>             what could be the reason, in node1, cman_tool nodes shows
>>             only node1 online, in node2 it shows only node2 is online.
>>             How to make two nodes as online, even thought CMAN service
>>             is running in both nodes.
>>
>>             Thanks in advance.
>>
>>             Regards,
>>             Gopal
>>
>>
>>
>>
>>
>>
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>>
>>
>
> --
> Cheers,
> Florian Crouzat
>
> ______________________________**_________________
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>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/**doc/Cluster_from_Scratch.pdf<http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf>
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>
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