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Re: [Linux-cluster] GFS on CentOS - cman unable to start



> Hi,

> I think CMAN expect that the names of the cluster nodes be the same returned by the command "uname -n".

> For what you write your nodes hostnames are: test01.gdao.ucsc.edu and test02.gdao.ucsc.edu, but in cluster.conf you have declared only "test01" and "test02".

 

I haven't found this to be the case in the past.  I actually use a separate short name to reference each node which is different than the hostname of the server itself.  All I've ever had to do is make sure it resolves correctly.  You can do this either in DNS and/or in /etc/hosts.  I have found that it's a good idea to do both in case your DNS server is a virtual machine and is not running for some reason.  In that case with /etc/hosts you can still start cman.  

 

I would make sure whatever node names you use in the cluster.conf will resolve when you try to ping it from all nodes in the cluster.  Also make sure your cluster.conf is in sync between all nodes.

 

-Kevin

 

 


These servers are currently on the same host, but may not be in the future.  They are in a vm cluster (though honestly, I'm not sure what this means yet).

SElinux is on, but disabled.
Firewalling through iptables is turned off via system-config-securitylevel

There is no line currently in the cluster.conf that deals with multicasting.

Any other suggestions?

Wes

On 1/6/2012 12:05 PM, Luiz Gustavo Tonello wrote:

Hi,

 

This servers is on VMware? At the same host?

SElinux is disable? iptables have something?

 

In my environment I had a problem to start GFS2 with servers in differents hosts.

To clustering servers, was need migrate one server to the same host of the other, and restart this.

 

I think, one of the problem was because the virtual switchs.

To solve, I changed a multicast IP, to use 225.0.0.13 at cluster.conf 

  <multicast addr="225.0.0.13"/>

And add a static route in both, to use default gateway.

 

I don't know if it's correct, but this solve my problem.

 

I hope that help you.

 

Regards.

 

On Fri, Jan 6, 2012 at 5:01 PM, Wes Modes <wmodes ucsc edu> wrote:

Hi, Steven.

I've tried just about every possible combination of hostname and
cluster.conf.

ping to test01 resolves to 128.114.31.112
ping to test01.gdao.ucsc.edu resolves to 128.114.31.112

It feels like the right thing is being returned.  This feels like it
might be a quirk (or bug possibly) of cman or openais.

There are some old bug reports around this, for example
https://bugzilla.redhat.com/show_bug.cgi?id=488565.  It sounds like the
way that cman reports this error is anything but straightforward.

Is there anyone who has encountered this error and found a solution?

Wes



On 1/6/2012 2:00 AM, Steven Whitehouse wrote:
> Hi,
>
> On Thu, 2012-01-05 at 13:54 -0800, Wes Modes wrote:
>> Howdy, y'all. I'm trying to set up GFS in a cluster on CentOS systems
>> running on vmWare. The GFS FS is on a Dell Equilogic SAN.
>>
>> I keep running into the same problem despite many differently-flavored
>> attempts to set up GFS. The problem comes when I try to start cman, the
>> cluster management software.
>>
>>     [root test01]# service cman start
>>     Starting cluster:
>>        Loading modules... done
>>        Mounting configfs... done
>>        Starting ccsd... done
>>        Starting cman... failed
>>     cman not started: Can't find local node name in cluster.conf
>> /usr/sbin/cman_tool: aisexec daemon didn't start
>>                                                                [FAILED]
>>
> This looks like what it says... whatever the node name is in
> cluster.conf, it doesn't exist when the name is looked up, or possibly
> it does exist, but is mapped to the loopback address (it needs to map to
> an address which is valid cluster-wide)
>
> Since your config files look correct, the next thing to check is what
> the resolver is actually returning. Try (for example) a ping to test01
> (you need to specify exactly the same form of the name as is used in
> cluster.conf) from test02 and see whether it uses the correct ip
> address, just in case the wrong thing is being returned.
>
> Steve.
>
>>     [root test01]# tail /var/log/messages
>>     Jan  5 13:39:40 testbench06 ccsd[13194]: Unable to connect to
>> cluster infrastructure after 1193640 seconds.
>>     Jan  5 13:40:10 testbench06 ccsd[13194]: Unable to connect to
>> cluster infrastructure after 1193670 seconds.
>>     Jan  5 13:40:24 testbench06 openais[3939]: [MAIN ] AIS Executive
>> Service RELEASE 'subrev 1887 version 0.80.6'
>>     Jan  5 13:40:24 testbench06 openais[3939]: [MAIN ] Copyright (C)
>> 2002-2006 MontaVista Software, Inc and contributors.
>>     Jan  5 13:40:24 testbench06 openais[3939]: [MAIN ] Copyright (C)
>> 2006 Red Hat, Inc.
>>     Jan  5 13:40:24 testbench06 openais[3939]: [MAIN ] AIS Executive
>> Service: started and ready to provide service.
>>     Jan  5 13:40:24 testbench06 openais[3939]: [MAIN ] local node name
>> "test01.gdao.ucsc.edu" not found in cluster.conf
>>     Jan  5 13:40:24 testbench06 openais[3939]: [MAIN ] Error reading CCS
>> info, cannot start
>>     Jan  5 13:40:24 testbench06 openais[3939]: [MAIN ] Error reading
>> config from CCS
>>     Jan  5 13:40:24 testbench06 openais[3939]: [MAIN ] AIS Executive
>> exiting (reason: could not read the main configuration file).
>>
>> Here are details of my configuration:
>>
>>     [root test01]# rpm -qa | grep cman
>>     cman-2.0.115-85.el5_7.2
>>
>>     [root test01]# echo $HOSTNAME
>>     test01.gdao.ucsc.edu
>>
>>     [root test01]# hostname
>>     test01.gdao.ucsc.edu
>>
>>     [root test01]# cat /etc/hosts
>>     # Do not remove the following line, or various programs
>>     # that require network functionality will fail.
>>     128.114.31.112      test01 test01.gdao test01.gdao.ucsc.edu
>>     128.114.31.113      test02 test02.gdao test02.gdao.ucsc.edu
>>     127.0.0.1               localhost.localdomain localhost
>>     ::1             localhost6.localdomain6 localhost6
>>
>>     [root test01]# sestatus
>>     SELinux status:                 enabled
>>     SELinuxfs mount:                /selinux
>>     Current mode:                   permissive
>>     Mode from config file:          permissive
>>     Policy version:                 21
>>     Policy from config file:        targeted
>>
>>     [root test01]# cat /etc/cluster/cluster.conf
>>     <?xml version="1.0"?>
>>     <cluster config_version="25" name="gdao_cluster">
>>         <fence_daemon post_fail_delay="0" post_join_delay="120"/>
>>         <clusternodes>
>>             <clusternode name="test01" nodeid="1" votes="1">
>>                 <fence>
>>                     <method name="single">
>>                         <device name="gfs_vmware"/>
>>                     </method>
>>                 </fence>
>>             </clusternode>
>>             <clusternode name="test02" nodeid="2" votes="1">
>>                 <fence>
>>                     <method name="single">
>>                         <device name="gfs_vmware"/>
>>                     </method>
>>                 </fence>
>>             </clusternode>
>>         </clusternodes>
>>         <cman/>
>>         <fencedevices>
>>             <fencedevice agent="fence_manual" name="gfs1_ipmi"/>
>>             <fencedevice agent="fence_vmware" name="gfs_vmware"
>> ipaddr="gdvcenter.ucsc.edu" login="root" passwd="1hateAmazon.com"
>> vmlogin="root" vmpasswd="esxpass"
>> port="/vmfs/volumes/49086551-c64fd83c-0401-001e0bcd6848/eagle1/gfs1.vmx"/>
>>         </fencedevices>
>>         <rm>
>>         <failoverdomains/>
>>         </rm>
>>     </cluster>
>>
>> I've seen much discussion of this problem, but no definitive solutions.
>> Any help you can provide will be welcome.
>>
>> Wes Modes
>>
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>
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--
Luiz Gustavo P Tonello.



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