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Re: linux-HA cluster ?

Karl,

On Wed, 11 Apr 2007, Karl Hanzel wrote:


Hi Art -
I'm looking into writing my own OCF resource agent script for an LDM server...
I wrote a script that monitors the LDM realservers for addition/removal from the cluster and a script or two for the HA part. I can send you some scripts if you'd like... let me know.
I'm guessing that your script(s) aren't quite what i'm looking for, but i could be wrong.
In the linux-HA version-2 way of things, OCF Resource Agents are those found in /usr/lib/ocf/resource.d/{provider}/ ... similar to an init script that you might find in /etc/init.d/, but with the enhanced functionality (monitor, & meta-data functions in addition to start, stop, & status). Is that what you have? If so, then yes, i'd be very interested to have a look-see.
No, I don't have anything using the new OCF-style. I do have one script in /etc/ha.d/resource.d which I suspect is a similar location. It just switches the ipvs state between master/backup on failovers and notifies me when this occurs: 

#!/bin/csh -x

if( $1 == "start" ) then
# Make this director a multi-cast master for sending state to backup directors
# Stop any running backup ipvs_syncd
/sbin/ipvsadm --stop-daemon backup
# ipvsadm V1.0.8 does not want the "backup" argument
#/sbin/ipvsadm --stop-daemon
# Start the master ipvs_syncd
/sbin/ipvsadm --start-daemon master --mcast-interface eth0
/bin/mail -s "`hostname` assuming master role" person << EOD
.
EOD
endif

if( $1 == "stop" ) then
# Make this director a multi-cast backup for receiving state from a master 
director
# Stop any running master ipvs_syncd
/sbin/ipvsadm --stop-daemon master
# ipvsadm V1.0.8 does not want the "master" argument
#/sbin/ipvsadm --stop-daemon
# Start the backup ipvs_syncd
/sbin/ipvsadm --start-daemon backup --mcast-interface eth0
/bin/mail -s "`hostname` assuming backup role" person << EOD
.
EOD
endif

                          Art



Thanks!


Karl
*----->



Arthur A. Person
Research Assistant, System Administrator
Penn State Department of Meteorology
email:  person@xxxxxxxxxxxxx, phone:  814-863-1563
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