linux-HA cluster ?

[Arthur A. Person]

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 at meteo.psu.edu, phone:  814-863-1563