You create an application server as a member of a configured cluster.
Before you begin
You must create a cluster if you do not already have a configured
cluster.
About this task
If you are migrating from a previous version of WebSphere Application
Server, you can upgrade a portion of the nodes in a cell, while leaving others
at the other release level. For a time, you might be managing servers that
are at a previous release level and servers that are running at the newer
release in the same cell.
In this mixed environment,
some restrictions apply regarding what you can do with clusters and cluster
members:
- You cannot create a cluster member using a server that is running on WebSphere
Application Server Version 5.x.
- You cannot add a member that is running WebSphere Application Server Version
5.x to any cluster.
To create a new cluster member,
view information about existing cluster members, or manage existing cluster
members:
Procedure
- In the administrative console, click Servers > Clusters > cluster_name > Cluster
members. The Cluster members page lists members of a cluster,
and for each member indicates:
- The node on which the member resides.
- Whether the member is started, stopped, or encountering problems.
- Click New to create a new cluster member.
- Specify a name for the cluster member (application server).
The name must be unique within the node.
- Select the node for the cluster member.
- Specify the server weight. The weight value controls the amount
of work that is directed to the application server. If the weight value for
the server is greater than the weight values that are assigned to other servers
in the cluster, then the server receives a larger share of the workload. The
value can range from 0 to 20.
- Specify whether to generate unique HTTP ports.
- Specify the server template.
- Save your configuration. As part of saving
the change to the configuration, you can select Synchronize changes with
Nodes before clicking Save on the Save page.
Results
You created application servers that are members of an existing server
cluster.
What to do next
If when you created the new members, you chose to generate unique
ports, update the alias list for the virtual host that you plan to use with
the new servers.
You can:
- Click on the name of the cluster member under Member name on the Cluster members page in
the administrative console, and examine the settings for a specific cluster
member.
- Create a backup cluster. See Creating backup clusters
for more information.
- Start the cluster. See Starting clusters
for more information.
- Use scripting to automate the task of adding cluster members.