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Re: [nv-l] [NV-L]: Status Polling Public Addresses on MSCS Clusters

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Subject: Re: [nv-l] [NV-L]: Status Polling Public Addresses on MSCS Clusters
From: "Jon Austin" <AUSTINJ@email.chop.edu>
Date: Fri, 17 Mar 2006 14:58:05 -0500
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Sorry about that. My concerns at this point are more theoretical.....

NV 714, FP4

MCSC Cluster - Microsoft Cluster, how almost all Microsoft
High-Availability clusters get built. Think HACMP in AIX....
Active/Passive Configuration - IP address and shared resources managed
by MSCS. When cluster 'fails over', IP address and shared resources are
taken over by the passive node. In a successful failover, from NetView's
perspective, The IP Address gets deleted from one Node object and added
to another node object. 

The scenario I've been asked to solve is the unsuccessful failover,
where the IP address gets deleted from one Node object but doesn't get
added back to another node object. 

Just wanted to see if anyone else had solved the issue and would like
to share.......

Jon Austin
Tivoli/Unix Administrator
Information Systems
Children's Hospital of Philadelphia

>>> jshanks@us.ibm.com 3/13/2006 3:00 PM >>>
I  cannot follow much of this.  I wouldn't know an MSCS Cluster from
sainted aunt, nor what the failover process was supposed to be,
complete or
But I do know a little something about the StateCorrelation Engine
and how it plays a role in events sent from TEC, and even with that, I
can't for the life follow what you mean by,
> Doesn't look like SCE under NV->TEC adapter did anything to the
sent over to TEC.

To have the SCE do something other than what it ships with by default,
you'd have to write your own rules in xml, add them to the
file, and unless the action you wanted was already defined in a current
file in the ZCE_CLASSPATH, which lists those jars from /usr/OV/jars/
provide functions for the SCE to execute, you'd have to provide a new
as well, containing java code you wrote to do the job.  Is that what
are doing?  Not one customer in 500 is that ambitious, I think.  We've
never actually documented in NetView how you would do anything like
since TEC owns the code and the APIs.

So let's take a step back and you can start at the beginning about
going on.
What NetView platform?  What version and release?
What events are we talking about and how were they supposed to look
they got to TEC?  What do you get instead?

James Shanks
Level 3 Support  for Tivoli NetView for UNIX and Windows
Tivoli Software / IBM Software Group

             "Jon Austin"                                              
             Sent by:                  <nv-l@lists.us.ibm.com>         
                                       [nv-l] [NV-L]: Status Polling   
             03/13/2006 11:14          Public Addresses on MSCS
             Please respond to                                         

I'm building up a new (greenfield) NV environment and looking toward
implementing as much 'automated' status polling as possible.
NV is forwarding to TEC using the out-of-the-box TEC_ITS ruleset,
rules, and such.

For our Microsoft Clusters, I'm being asked by our architect to solve
the problem of the unsuccessful cluster failover.

In this scenario, let's take a simple two-node, active-passive
configuration. Both nodes with proper SNMP configuration,
and for fun, status polling is done via SNMP rather than ICMP.

In the example, MSCS doesn't completely fail over to the a passive
for some reason, but both devices are still
online via their primary interfaces, and can respond to SNMP GETs. In
the scenario, the active has dropped it's cluster IP address, but
it hasn't been assigned onto the passive node.

In testing using nmdemandpoll to speed up the polling interval, I've
seen for a successful failover, the TEC_ITS_INTERFACE_STATUS
events come through from NV on the primary node for the interface
deletions, but no events from NV on the passive node for inteface
An ovtopodump does show the interface object moved from active to
passive. trapd.log shows the deletes and adds.

Doesn't look like SCE under NV->TEC adapter did anything to the events
sent over to TEC.

Anyone care to share their thoughts on solving this particular
that doesn't make it harder to maintain NV.??

Jon Austin
Tivoli/Unix Administrator
Information Systems
Children's Hospital of Philadelphia

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