Network Deployment (Distributed operating systems), v8.0 > Set up the application serving environment > Administer nodes and resources > Administer nodes remotely using the job manager > Submit jobs > Submit jobs to manage servers

Create cluster members using the job manager

In a flexible management environment, you can submit the Create cluster member job to create a server to add to a cluster. A cluster is a set of servers that you manage together to balance workload. The cluster can group application servers, proxy servers, or on-demand routers. Each server in the cluster is a cluster member. The job creates a cluster member that runs on a dmgr node. The cluster member becomes a managed resource of the job manager.

Start the job manager, the dmgr on which the cluster resides, and federated nodes of the dmgr. A cluster must exist on a dmgr node.

Determine how to configure the cluster member:

• Review topics on clusters and workload management, especially the information about setting cluster weights.
• Determine the target to which to add the first cluster member. The target must be a managed target of the job manager.
• Determine the appropriate configuration settings for the first cluster member. A copy of the first cluster member that you create is stored as part of the cluster data and becomes the template for all additional cluster members that you create.

Your ID at the job manager must be authorized for the administrator role or the operator role to submit jobs. When you submit a job, you can specify a user name and password for authentication and authorization at the target or targets. When you submit a job to multiple targets, the user name and password or the credentials for the submitter must apply to all the job targets.

We can use the admin console of the job manager or the dmgr to create a cluster member for one or more managed clusters. From the console, choose the Create cluster member job, select the clusters to which to add members, specify job options, review the summary, and submit the job.

Instead of using a console, you can run the createClusterMember job script in the AdministrativeJobs command group. See the Administrative job types topic.

Procedure

1. Click Jobs > Submit from the navigation tree of the admin console.

2. Choose a job to create a cluster member.

   1. Select the Create cluster member job type from the list.

   2. Optionally specify a description of the job.

   3. Click Next.

3. Choose the job targets on which to add the cluster member.

   Select one or more managed dmgr nodes that have the target cluster.

   1. Select a group of targets from the list, or select Target names.

   2. If you selected Target names, then specify a target name and click Add, or click Find and specify the chosen targets on the Find targets page.

   3. If user authentication is required, specify a user name, password, or any other authentication values as needed.

   4. Click Next.

4. Specify parameters for the create cluster member job.

   1. For Cluster name, specify the name of the cluster to which to add a member. For example, suppose a managed dmgr cell, myCellmanager01, has a managed cluster, cluster2. Specify the name of the cluster that is managed by the job manager:

      cluster2
      

   2. For Member node, specify the name of the node on which the target cluster resides. For example, suppose the Target resources page shows that the dmgr node on which cluster2 resides is named node1. Specify the member node name:

      node1
      

   3. For Member name, specify a cluster member name that is unique on the target cluster. For example, suppose a target cluster, cluster2, has one cluster member, cluster_member_1. Specify a name that is unique to cluster2:

      cluster_member_2
      

   4. If you want the new cluster member to have a Member weight value other than 2, the default, specify a different weight value.

      A valid weight value is a number between 0 and 100. The weight controls the amount of work directed to the server. If the weight is greater than the weight assigned to other cluster members, the server receives a larger share of the workload.

   5. Optionally, specify a universally unique identifier (UUID) for the cluster member.

      If you do not specify a value, the product generates a UUID.

   6. If you do not want the product to generate unique port numbers for the cluster member, clear Generate unique ports.

      By default, the product generates unique port numbers for HTTP transports defined in the server. The default value is selected (true).

   7. If the cluster has a replication domain and you want to create a replicator entry for the new cluster member in the cluster replication domain, select Replicator entry (true).

      The product uses a replication domain for HTTP session data replication. By default, the product does not create a replicator entry for a cluster member in the cluster replication domain. The default value is clear (false).

   8. If you are creating a cluster on a z/OS target, optionally specify a cluster member short name.

      If you do not specify a value, the product generates a unique short name.

   9. Optionally, expand Additional job parameters and specify values that further define the cluster member.

      Additional Create cluster member job parameters. Specify job parameters as needed.

      Parameter name	Description
      Template name	To use a specific cluster member template, specify the name of the template.
      Template node name	To use an existing cluster member as a template, specify the name of the node that has a cluster member to use as a template for the new cluster member.
      Template server name	To use a specific server as a template for the new cluster member, specify the server name.
      Node group	If you want the cluster member to belong to a node group, specify the name of the node group.
      Core group	If you want the cluster member to belong to a core group, specify the name of the core group.

   10. Click Next.

5. Schedule the job.

   The times and dates that you specify are relative to the job manager.

   1. Optionally specify one or more email addresses where notifications are sent when the job finishes.

      If you specify multiple email addresses, separate them with commas.

   2. Select when the job is available for submission.

   3. Select the job expiration.

   4. Optionally specify a recurring interval for the job, a start date and time for the interval, and an end date and time for the interval.

   5. Click Next.

6. Review the summary, and click Finish to submit the job.

Results

The targets run the job and attempt to create a cluster member of the target cluster.

What to do next

On the Job status page, click the ID of the create cluster member job and view the job status. If the job is not successful, view any error messages that result from running the job, correct the error condition, and submit the job again.

If the job is successful, click Jobs > Target resources to see the new cluster member in the list of resources. The status of the member is Stopped.

After creating the cluster member, you can run a job that starts the cluster. Starting the cluster also starts the cluster member.
Clusters and workload management
Create clusters
Start and stop the job manager
Start and stop the dmgr
Start and stop a node
Set up a job manager environment
Create clusters using the job manager
Start clusters using the job manager

Related

Administrative job types using wsadmin.sh
Find targets
Find target resources
Target resources collection
Create a cluster: Create first cluster member

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