Restoring a WAS Base node
Because all configuration data is kept in the master repository on the Deployment Manager node, the following procedure is fairly easy due to WAS's centralized configuration replication mechanism.
Important: The hereafter described method, especially the addNode command, may not work for versions prior to WAS V5.1!
1. Reinstall IBM WAS Base V5.1 (and IBM HTTP Server if collocated on the same system) with the same parameters/features as before. Specify the same values for node name and host name in the setup dialog as during the previous installation. The node name of the failed node can be retrieved from the WebSphere Administrative Console by expanding System Administration and clicking Nodes (see Figure A-3).
Note It is important to use exactly the same node name during reinstallation of IBM WAS Base V5.1. Otherwise the repository synchronization will fail to restore the node's previous configuration state, simply because the node is still unavailable from the Deployment Manager's point of view. Instead, another new node will be added to the cell after node federation, which then needs to be configured manually.
For information on installing WAS V5.0 and higher and IBM HTTP Server, refer to the redbook IBM WAS V5.0 System Management and Configuration: WebSphere Handbook Series, SG24-6195 or to the WebSphere V5.1 InfoCenter.
2. Reinstall all fixes and fixpacks that were previously installed on the system using the Updateinstaller. The Updateinstaller comes with fixpacks, but can also be obtained separately from the WebSphere support page found at http://www.ibm.com/software/webservers/appserv/was/support/
by clicking the Updateinstaller link in the Self Help -> Download section. Refer to the included readme file and documentation on how to use the Updateinstaller program.
3. Federate the base node into the cell using the addNode command or the WebSphere Administrative Console. For detailed instructions on how to federate a node into a cell, refer to chapter 7.4.4 in IBM WAS V5.0 System Management and Configuration: WebSphere Handbook Series, SG24-6195 or to the WebSphere V5.1 InfoCenter. This step will automatically start the Node Agent on the base node, who in turn performs an initial repository synchronization; after that the newly restored node has the latest configuration data available.
4. Start the appserver or cluster member on the newly restored node.
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