Manually Migrating a Server

Friday, April 17, 2009

I was recently helping a client setup whole server migration where one server in the cluster hosted a singleton JMS queue, as a result the client weanted to use whole server migration so that the server would automatically migrate to a new machine in case of failure. We also wanted to test manually migrating this server to an alternate machine in case a planned outage was required. Unfortunately it turned out that the process for manually migrating a server was not obvious, changing the server on the migration page did nothing and the server stubbornly continued to restart on the current host machine.

After doing some poking around, we found the following process worked.

• Stop the migratable server
• Change the machine to the server you want it to boot on in the Admin Console
• Change the list of candidate servers so that the machine you want to boot on is first in the list.
• The target machine in Servers|Control|Migration should reflect the machine you chose in b automatically but confirm it.
• Start the server, now starts on the new server.

I assume the existing process works the way it does because this would be the desired way to working when performing a failback, thus for a planned outage follow the steps above.

Posted by Gerald Nunn at 10:34 AM | Categories: WebLogic | Permalink