How to run the Start_Script outside the cluster

Question

Hi
We have a 3 node cluster and we have 4 RG created. All is working fine.
In the situation , where the appliaction stops for some reason , I have created the probe script to only page the team and not do anything else. The probe script is always returning 0.
Also , I have suppresed the PMF monitoring as described by http://blogs.sun.com/TF/entry/disabling_pmf_action_script_with
This is the start of my start script
=====================================
#!/bin/ksh
while getopts 'R:G:' opt
do
case "${opt}" in
R) RESOURCE=${OPTARG};;
G) RESOURCEGROUP=${OPTARG};;
esac
done
sleep 60 &
/usr/cluster/bin/pmfadm -s ${RESOURCEGROUP},${RESOURCE},0.svc
[...rest of your code to start the application...]
===============================================
The reason , we did this way is because
1>When the application daemon goes down , only the master process goes down , all the child process are still up and running . The child process do not need the main daemon as long as they are UP. They only need main daemon if they need to restart.
2>If we go by complete restart of the Resource , it will kill all the child process before starting them. This can be cause of concern for us since restarting of the child process required vendor interaction attimes as most of them are TCPIP connections with various applications(We are interface engine shop)
3>However, We can just start the main daemon only and all the previous child process can connect back to it.
Question is how? I tried starting the Start script outside the cluster by passing the parameters of Resource and RG , but it threw this error
"pmfadm: ",,0.svc" No such <nametag> registered" , and I think this is because Iam running it outside the cluster as they do not have access to pmadm process. However, it starts the daemon , but I do not know if that will start PMF monitoring
4>So , how can I start the process outside the cluster
5>Also ,if I start the process outside the cluster , will it start the PMF monitoring
thanks
Dajiba
Edited by: Cluster_newbie on Jul 29, 2008 11:06 AM
Edited by: Cluster_newbie on Jul 29, 2008 11:08 AM

Answer 1

thanks for the answer , Thats good then. Ok , now why I need to run it outside the SC
1>Ours is a Egate envirnoment and the process that gets started by my START_SCRIPT is a boot strap kind of a daemon process. This process in turn launches multiple TCPIP , ODBC , FTP process and they run independently once they are launched.
2>The daemon process is what we are doing a probe on. This daemon process sometimes can go down and more or less it is normal , however the child process still continues to run. In non cluster envirnoment , we just start the daemon again and all works fine
3>However, if I take a restart option from Cluster when the daemon dies , It will first STOP the data service(stop all the child process) , then start it . My requirement is that I should NOT stop the Dataservice because stoping the DS will result in killing of child processes too My requirement is just to launch the START_SCRIPT so that only daemon is started. If the child process are still running , the daemon will not launch any duplicate child processes
I can make Stop script more intellegent , but it is very difficult to know in what situation the Stop was called from. If I know it was from RESTART option , I can then ignore killing the child process. But I guess it is very difficult to know
4>So , I thought , if the Daemon goes down , I will start the daemon outside the SC and my probe script will still do its job . I have anyway disabled the PMF monitoring , so I do not care about the PMF
does it make sense?
Do you know any other way of starting the start_script withing SC , without doing shutdown and start
thanks
Dajiba