Managing Servers in a Cluster

To edit a server:

1. In the UI, go to Administration | Servers.
2. From the Servers list, select the server you would like to edit, and click .
3. Edit the server name, and click Save.

To disable a server:

1. Remove the server you intend to shut down from your load balancing pool. This should be done following the recommended procedure depending on your load balancing configuration.
2. In the UI, go to Administration | Servers.
3. Select the server you would like to disable, and click .
   Click OK when a notification asking to confirm your decision is displayed.
4. The server’s status should indicate that it is disabling. This process may take between a few seconds and a minute, depending on the number and size of sessions and on your network throughput.

Note:

The load will increase on active servers during this process since some of the server's sessions are moved to other cluster members.

To enable a server:

1. In the UI, go to Administration | Servers.

2. From the Servers list, select the server you would like to enable and click .

3. Once the UI indicates that the server has been enabled, return it to your load balancer. This should be done following the recommended procedure depending on your load balancing configuration.

Note:

The load will increase on active servers during this process since some of the server's sessions are moved back to the enabled server.

To remove a server from the cluster:

1. Remove the server you intend to shut down from your load balancing pool. This should be done following the recommended procedure depending on your load balancing configuration.
2. In the UI, go to Administration | Servers.
3. Select the server you would like to remove from the cluster, and in the Action bar, click .
   The remove process performs a Graceful Shutdown to ensure your Session Clustering data is not lost.

4. Click OK when a notification asking to confirm your decision is displayed.

5. Refresh the Servers list. If the server is no longer listed, it has been successfully removed.

Note:

If you plan to remove more than one server, repeat this process for each server after receiving confirmation that the previous server has been removed. Shutting servers down one by one is required to ensure information consistency. While a server is being removed you will not be able to add, edit or remove any other servers.

The server will still be listed in the table but will no longer belong to the cluster. Once a server is removed, you will once again be able to login to the Zend Server UI that is running on the server. All configuration and management actions will now be done directly from the server.

Configurations

Even if there were different configurations on the server before it was added to the cluster, the settings that were given to the server as part of a cluster will stay the same even after it was removed. The one exception to this are the Zend Monitor settings which will be restored to the server after it was removed.

Session Clustering

Removing a server from the cluster initiates a Graceful Shutdown process whereas all the active sessions will be rerouted to the other servers in the cluster. While the graceful shutdown is running, removing additional servers in the cluster is impossible. Once the shutdown is completed, you will be able to remove more servers.

To force remove a server from the cluster:

1. Remove the server you intend to shut down from your load balancing pool. This should be done following the recommended procedure depending on your load balancing configuration.
2. In the UI, go to Administration | Servers.
3. Select the server you would like to force remove, and click .
   

4. Click OK when a notification asking to confirm your decision is displayed.

5. Refresh the Servers list. If the server is no longer listed, it has been successfully removed.

Note:

If you plan to remove more than one server, repeat this process for each server after receiving confirmation that the previous server has been removed. Shutting servers down one by one is required to ensure information consistency. While a server is being removed you will not be able to add, edit or remove any other servers.

To restart servers in your cluster:

1. In the UI, go to Administration | Servers.
2. From the Servers list, select the servers you would like to restart, or select the whole list to restart the entire cluster.
3. In the Action bar, click.
   The selected servers will be restarted according to the defined strategy.

Note:

This type of restart will perform a full server restart. For more information, see Server Restart.