[Pacemaker] CMAN nodes online

Gopalakrishnan N gopalakrishnan.an at gmail.com
Tue Sep 17 09:26:50 UTC 2013


Now am able to see both nodes are registered...

Node  Sts   Inc   Joined               Name
   1   M    124   2013-09-17 22:05:31  test01.iopextech.com
   2   M    132   2013-09-17 22:31:33  test02.iopextech.com

Is there any timeout option, where i can increase or decrease based on this?

Thanks..


On Tue, Sep 17, 2013 at 4:53 PM, Gopalakrishnan N <
gopalakrishnan.an at gmail.com> wrote:

> Even after giving FQDN in my /etc/hosts and /etc/sysconf/network also
> updated in cluster.conf, propogated to other node as well, but still its
> showing only one node. And muticast also enabled in my switch.
>
>
>
>
> On Mon, Sep 16, 2013 at 11:52 PM, Gopalakrishnan N <
> gopalakrishnan.an at gmail.com> wrote:
>
>> My /etc/hosts is like this,
>> cat /etc/hosts
>> 127.0.0.1   localhost localhost.localdomain localhost4
>> localhost4.localdomain4
>> ::1         localhost localhost.localdomain localhost6
>> localhost6.localdomain6
>> 10.30.2.98  test01.iopextech.com test01
>> 10.30.2.99  test02.iopextech.com test02
>>
>>
>> and in my cluster.conf i have given the short name. So what you are
>> saying better to use FQDN...!
>>
>> I will try to give FQDN in all my configuration files.
>>
>> And will try. Let's see.
>>
>> Thanks for your comments.
>>
>>
>>
>> On Mon, Sep 16, 2013 at 11:41 PM, Florian Crouzat <
>> gentoo at floriancrouzat.net> wrote:
>>
>>> Le 16/09/2013 17:30, Gopalakrishnan N a écrit :
>>>
>>>> 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 <http://test01.iopextech.com>: UNCLEAN
>>>> (offline)
>>>> Node test02: UNCLEAN (offline)
>>>> Node test02.iopextech.com <http://test02.iopextech.com>: UNCLEAN
>>>> (offline)
>>>>
>>>> Thanks.
>>>>
>>>>
>>> Ok, if you are still unhappy with CMAN check your switch for multicast.
>>>
>>> From there, I assume you are happy with cman otherwise there are no
>>> reasons to start pacemaker, but you did, so you get my point ;)
>>>
>>> This kind of errors often indicates that your /etc/hosts or DNS is wrong
>>> and pacemaker has a hard time to map hostnames and IPs, etc (not sure about
>>> the internals there...)
>>> Get rid of the invalid nodes by editing the configuration; stop
>>> pacemaker; fix your resolutions and retry.
>>>
>>> In the entire process, I usually use FQDN in my cluster.conf file, and I
>>> add them and the corresponding ring IP in my /etc/hosts file on all nodes.
>>> I also use the same FQDN in my pacemaker configuration.
>>>
>>> Cheers
>>>
>>>
>>>
>>>>
>>>>
>>>> On Mon, Sep 16, 2013 at 8:40 PM, Florian Crouzat
>>>> <gentoo at floriancrouzat.net <mailto:gentoo at floriancrouzat.**net<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>
>>>> >
>>>>         <mailto:gopalakrishnan.an at __gm**ail.com <http://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>
>>>> >
>>>>         <mailto:gopalakrishnan.an at __gm**ail.com <http://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>
>>>> >
>>>>                  <mailto:gopalakrishnan.an at __gm**ail.com<http://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>
>>>>
>>>>         <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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>>>> >
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>>>>
>>>>         <http://oss.clusterlabs.org/**mailman/listinfo/pacemaker<http://oss.clusterlabs.org/mailman/listinfo/pacemaker>
>>>> >
>>>>
>>>>         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>
>>>>
>>>>         <http://www.clusterlabs.org/**doc/Cluster_from_Scratch.pdf<http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf>
>>>> >
>>>>         Bugs: http://bugs.clusterlabs.org
>>>>
>>>>
>>>>
>>>>     --
>>>>     Cheers,
>>>>     Florian Crouzat
>>>>
>>>>     ______________________________**___________________
>>>>     Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>>>>     <mailto:Pacemaker at oss.**clusterlabs.org<Pacemaker at oss.clusterlabs.org>
>>>> >
>>>>     http://oss.clusterlabs.org/__**mailman/listinfo/pacemaker<http://oss.clusterlabs.org/__mailman/listinfo/pacemaker>
>>>>
>>>>     <http://oss.clusterlabs.org/**mailman/listinfo/pacemaker<http://oss.clusterlabs.org/mailman/listinfo/pacemaker>
>>>> >
>>>>
>>>>     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>
>>>>
>>>>     <http://www.clusterlabs.org/**doc/Cluster_from_Scratch.pdf<http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf>
>>>> >
>>>>     Bugs: http://bugs.clusterlabs.org
>>>>
>>>>
>>>>
>>>>
>>>> ______________________________**_________________
>>>> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>>>> http://oss.clusterlabs.org/**mailman/listinfo/pacemaker<http://oss.clusterlabs.org/mailman/listinfo/pacemaker>
>>>>
>>>> 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>
>>>> Bugs: http://bugs.clusterlabs.org
>>>>
>>>>
>>>
>>> --
>>> Cheers,
>>> Florian Crouzat
>>>
>>> ______________________________**_________________
>>> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>>> http://oss.clusterlabs.org/**mailman/listinfo/pacemaker<http://oss.clusterlabs.org/mailman/listinfo/pacemaker>
>>>
>>> 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>
>>> Bugs: http://bugs.clusterlabs.org
>>>
>>
>>
>
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