[Linux-cluster] Starting two-node cluster with only one node

[Aaron Benner]

Have you tried setting the "post_join_delay" value in the  
<fence_daemon ...> declaration to -1?

<fence_daemon clean_start="0" post_fail_delay="0"  
post_join_delay="-1" />

This is a hint I picked up from the fenced man page section on  
avoiding boot time fencing.  It tells fenced to wait until all of the  
nodes have joined the cluster before starting up.  We use this on a  
couple of 2 node clusters (with qdisk) to allow them to start up  
without the first node to grab the quorum disk fencing the other node.

--Aaron

On Jul 16, 2009, at 12:16 AM, Abed-nego G. Escobal, Jr. wrote:

>
>
> Tried it and now the two node cluster is running with only one node.  
> My problem right now is how to force the second node to join the  
> first node's cluster. Right now it is creating its own cluster and  
> trying to fence the first node. I tried cman_tool leave on the  
> second node but I got
>
> cman_tool: Error leaving cluster: Device or resource busy
>
> clvmd and gfs are not running on the second node. What is running on  
> the second node is cman. When I did
>
> service cman start
>
> It took 5 approximately 5 minutes before I got the [ok] meassage. Am  
> I missing something here? Not doing right? Should be doing something?
>
>
> --- On Thu, 7/16/09, Abed-nego G. Escobal, Jr.  
> <abednegoyulo at yahoo.com> wrote:
>
>> From: Abed-nego G. Escobal, Jr. <abednegoyulo at yahoo.com>
>> Subject: [Linux-cluster] Starting two-node cluster with only one node
>> To: "linux clustering" <linux-cluster at redhat.com>
>> Date: Thursday, 16 July, 2009, 10:46 AM
>>
>> Using the config file below
>>
>> <?xml version="1.0"?>
>> <cluster name="GFSCluster" config_version="5">
>> <cman expected_votes="1" two_node="1"/>
>>   <clusternodes><clusternode
>> name="node01.company.com" votes="1"
>> nodeid="1"><fence><method
>> name="single"><device
>> name="node01_ipmi"/></method></fence></clusternode><clusternode
>> name="node02.company.com" votes="1"
>> nodeid="2"><fence><method
>> name="single"><device
>> name="node02_ipmi"/></method></fence></clusternode></clusternodes>
>>   <fencedevices><fencedevice
>> name="node01_ipmi" agent="fence_ipmilan" ipaddr="10.1.0.5"
>> login="root" passwd="********"/><fencedevice
>> name="node02_ipmi" agent="fence_ipmilan" ipaddr="10.1.0.7"
>> login="root" passwd="********"/></fencedevices>
>>   <rm>
>>     <failoverdomains/>
>>     <resources/>
>>   </rm>
>> </cluster>
>>
>> Is it possible to start the cluster by only bringing up one
>> node? The reason why I asked is because currently bringing
>> them up together produces a split brain, each of them member
>> of the cluster GFSCluster of their own fencing each other.
>> My plan is to bring up only one node to create a quorum then
>> bring the other one up and manually join it to the existing
>> cluster.
>>
>> I have already don the start_clean approach but it seems it
>> does not work.
>>
>>
>>
>>
>> --
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>> Linux-cluster at redhat.com
>> https://www.redhat.com/mailman/listinfo/linux-cluster
>>
>
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