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Re: [Linux-cluster] apache resource problem in RHCS 5.1



I want to add something I recently found out about the relocation time of IP resources, which I complained about.

The reason why it takes 10 seconds per IP can be found here: http://sources.redhat.com/cluster/faq.html#rgm_failovertime

Greetz
Lorenz

Marek 'marx' Grac wrote:
Hi,

Lorenz Pfiffner wrote:
Hi Ron

I couldn't make it working with the apache resource. For me it seems quite unstable and it's nowhere really mentioned in any documentation I found. So please, if any RedHat guy is reading this, can you please improve this feature and put it into the official documentation. For example, why does the apache.sh script change the "Listen" directive?
Look at my previous post to this thread. IMHO unstable is something that does not work.

How can I execute apache.sh manually to debug the resource?

If you want to debug, the best way is to run resource group manager in debug mode. So stop it in all machines, and run clurgmgrd -fd (stay forward and debug). Resource agents tries to log as much as is useful and you will see everything on output. If you want to run this script directly, you will have to setup all environment variables OCF_*.

My workaround: I altered the default httpd script and made a script resource. In that case it's working as expected. The only thing that bothers me quite a lot is the relocation time. It takes about 50 to 60 seconds to relocate 5 IPs, a GFS mount and the apache script resource! Is this a reasonable time? On older clusters I remember times around 5 to 10 seconds.

Default init script for httpd, mysqld, ... will work for you if you have only one httpd on your cluster. It is not suitable for running several instances on same machine. This is one of the reasons why we need resource agents.




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