[Pacemaker] CMAN nodes online
Gopalakrishnan N
gopalakrishnan.an at gmail.com
Mon Sep 16 11:52:26 EDT 2013
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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>>
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>> >
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>>
>>
>>
>> --
>> Cheers,
>> Florian Crouzat
>>
>> ______________________________**___________________
>> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>> <mailto:Pacemaker at oss.**clusterlabs.org<Pacemaker at oss.clusterlabs.org>
>> >
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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>
>> >
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>>
>>
>>
>>
>> ______________________________**_________________
>> 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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