[Linux-cluster] Determining failed node on another node of clusterduring failover

[Kit Gerrits]

Hello,

The Clustering software itself monitors nodes and devices in use by cluster
services, but logs to /var/log/messages.
A quick overview is presented by the 'clustat' command.

Monitoring tools are freely available for any platform.
Basic monitoring in Linux is available with Big Brother, Cacti, OpenNMS or
Nagios (in order of increasing complexity).
If you're bound to windows, maybe try ServersCheck .


Parsing logs can be trivial, once you know how.
What do you want to know and when do you want to know it?

Have you looked at 'clustat' and 'cman_tool'?


Regards,

Kit

-----Original Message-----
From: linux-cluster-bounces at redhat.com
[mailto:linux-cluster-bounces at redhat.com] On Behalf Of Parvez Shaikh
Sent: woensdag 12 januari 2011 11:01
To: linux clustering
Subject: Re: [Linux-cluster] Determining failed node on another node of
clusterduring failover

Hi

Is monitoring package part of RHCS? What is name of this component?

Is there any other mechanism which doesn't require to parse log/messages to
determine which node has left the cluster on stand by node before failover
is complee?

Thanks

On Wed, Jan 12, 2011 at 2:58 PM, Kit Gerrits <kitgerrits at gmail.com> wrote:
>
> Hello,
>
> If you want to find out which cluster node has failed, you could 
> either check /var/log/messages and see which member has left the 
> cluster, or you can set up monitoring to check if your servers are all in
good shape.
>
> If you are running a cluster, I would suggest also setting up monitoring.
> The monitoring package can then notify you if any cluster member fails.
>
>
> Regards,
>
> Kit
>
> -----Original Message-----
> From: linux-cluster-bounces at redhat.com 
> [mailto:linux-cluster-bounces at redhat.com] On Behalf Of Parvez Shaikh
> Sent: woensdag 12 januari 2011 7:04
> To: linux clustering
> Subject: [Linux-cluster] Determining failed node on another node of 
> clusterduring failover
>
> Hi all,
>
> Taking this question from another thread, here is a challenge that I 
> am facing -
>
> Following is simple cluster configuration -
>
> Node 1, node 2, node 3, and node4 are part of cluster, its 
> unrestricted unordered fail-over domain with active - active nxn 
> configuration
>
> So a node 2 can get services from node1, node3 or node4 when any of
> these(1,3,4) node fails(e.g. power failure).
>
> In that event I want to find out which of the node has failed over 
> node2, I was invoking "clustat -x -S service name" on node2 in my 
> custom agent and was parsing for "last_owner" field to obtain name of 
> node on which service was previously running.
>
> This however doesn't seem to be working in case if I shutdown node(but 
> works if I migrate service from one node to another using clusvcadm)
>
> Is there anyway that I can find out which node has failed during 
> failover of service on a standby node? Any tool which I might have 
> missed or some command which I can send to ccsd to get this 
> information
>
> Thanks
>
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