Configure deployment managers
Configure deployment managers for a single, central point of administrative control for all elements in a WAS distributed cell.
If we plan to change the system clock, stop all the application servers, the node agent servers, the deployment manager server, the administrative agent server, and the job manager server first. After you stop the servers, change the system clock, and then restart the servers. If we change the system clock on one system, you must ensure the clocks on all systems that communicate with each other and have WAS installed are synchronized. Otherwise, you might experience errors, such as security tokens no longer being valid.
(zos) If we plan to change the system clock, stop all the application servers, the node agent servers, the deployment manager server, the administrative agent server, the job manager server, and the location service daemon first. After you stop the servers and location service daemon, change the system clock, and then restart the servers and location service daemon. If we change the system clock on one system, you must ensure the clocks on all systems that communicate with each other and have WAS installed are synchronized. Otherwise, you might experience errors, such as security tokens no longer being valid.
dmgrs are administrative agents that provide a centralized management view for all nodes in a cell, as well as management of clusters and workload balancing of application servers across one or several nodes in some editions. Each cell contains one deployment manager.
(zos) WebSphere Application Server for z/OS uses workload management (WLM) as the primary vehicle for workload balancing.
A deployment manager hosts the console.
(zos) The JVM for the deployment manager runs in 64-bit addressing mode by default. The maximum amount of virtual memory available to each JVM on the z/OS operating system in 31-bit addressing mode is 2 gigabytes (GB). However, because of product requirements, the amount of virtual memory that is available to each JVM is somewhat less. To obtain more virtual memory for the deployment manager server, or any other server, run the server in 64-bit addressing mode. If we have applications that require large amounts of virtual memory, the applications might need to run on servers configured for 64-bit addressing mode.
Deprecated feature: You should eventually convert all of the servers to run in 64-bit addressing mode because support for running servers in 31-bit addressing mode is deprecated.depfeat
When creating a dmgr profile, a deployment manager is created. We can run the deployment manager with its default settings. However, we can change the deployment manager configuration settings, such as the ports that the process uses, custom services, logging and tracing settings, and so on. To view information about managing a deployment manager, use the settings page for a deployment manager.
- Click System administration > dmgr from the navigation tree of the console to access the settings page for a deployment manager.
- Configure the deployment manager by clicking a property, such as Custom services, and specifying settings.
- (zos) If we specify the server short name as eight characters, follow the directions to convert the default seven-character short name to eight characters.
- Optionally register or unregister the deployment manager with the job manager.
A job manager allows you to submit administrative jobs asynchronously for deployment managers and for application servers registered to administrative agents. Click System administration > Deployment manager. Under Additional Properties, click Job managers > Register/unregister with job manager.
You configured a deployment manager with options selecteded.
What to do next
We can continue to administer the product by doing such tasks as configuring cells and managing nodes, node agents, and node groups.
Use the deployment manager Diagnostic Provider to test connectivity between the deployment manager and the node agents. Click Troubleshooting > Diagnostic Provider > Tests > dmgr > DeploymentManagerDP > ping.-* from the navigation of the console. After running the diagnostic provider, click on the message text to get to the detail page that shows the node agent status. If the value field of the node agent is j2ee.state.stopped, the value usually means that the node agent is stopped. However, it can also mean that the deployment manager has lost network connectivity with the node agent. The deployment manager cannot distinguish between these two cases.
- dmgr settings
Use this page to stop the deployment manager, and to link to other pages that we can use to define additional properties for the deployment manager. A deployment manager provides a single, central point of administrative control for all of the elements in the WAS distributed cell.
- Rename deployment manager nodes
We can rename a deployment manager node by modifying the setupCmdLine file for the node.
(zos) Switching between 64 and 31 bit modes
(zos) Converting a 7-character server short name to 8 characters
Security considerations when in a multi-node WebSphere Application Server WebSphere Application Server Network Deployment environment