Navigating the PowerHA SystemMirror GUI

Health summary

In the PowerHA SystemMirror GUI, you can quickly view all events for a cluster in your environment. The following figure identifies the different areas of the PowerHA SystemMirror GUI that are used to view events and status.

Navigation pane

This area displays all the zones, clusters, sites, nodes, and resource groups in a hierarchy that was discovered by the PowerHA SystemMirror GUI. You can click to view resources for each cluster.

Notes:

• The clusters are displayed in alphabetic order. However, any clusters that are in a Critical or Warning state are listed at the top of the list.
• The Network tab is not included for the PowerHA SystemMirror for Linux Version 7.2.

Health Summary

This menu provides cluster administrative features for the selected item. You can create a cluster, add an existing cluster, remove an existing cluster, import multiple clusters, or create a zone from the Health Summary menu.

Scoreboard

This area displays the number of zones, clusters, nodes, and resource groups that are in Critical, Warning, or Maintenance state. You can click Critical, Warning, or Maintenance to view all the messages for a specified resource. For example, in Figure 1, there are 2 resource groups identified. If the warning icon was highlighted and you clicked the warning icon, all messages (critical, warning, and normal) for the 2 resource groups would be displayed.

Event filter

In this area, you can click the icons to display all events in your environment that correspond to a specific state. You can also search for specific event names.

Event timeline

This area displays events across a timeline of when the event occurred. This area allows you to view the progression of events that lead to a problem. You can zoom in and out of the time range by using the + or – keys or by using the mouse scroll wheel.

Event list

This area displays the name of the event, the time when each event occurred, and a description of the event. The information that is displayed in this area corresponds to the events you selected from the event timeline area. The most recent event that occurred is displayed first. You can click this area to display more detailed information about the event such as possible causes and suggested actions.

Action Menu

This area displays the following menus options:

Users

PowerHA SystemMirror GUI allows an admin to create and manage users by using Users menu. The admin can assign built-in roles to new users.

Note: You can only add user names that are defined on the host running the PowerHA SystemMirror GUI server.

Roles

The Roles tab displays information about available roles for each user. An admin can create custom roles and provide permission to different users. PowerHA SystemMirror GUI provides the following roles:

• ha_root
• ha_mon
• ha_op
• ha_admin

Snapshots

As an admin can create any number of snapshots and restore the existing cluster configuration as taken in snapshot. You can also edit existing snapshot and view details of the snapshot based on different filter options available.

Zones

You can create zones, which are groups of clusters. An admin can create zones and assign any number of clusters to a zone. You can also add new zones or edit existing zones.

Activity Logs

You can view information about all activities performed in the PowerHA SystemMirror GUI that resulted in a change by using the View Activity Log tab. This view provides various filters to search for specific activities for the cluster, roles, zone, or user management changes.

Smart Assist

A Smart Assist is a wizard that provides product-specific knowledge and assistance for configuring an application to be highly available within a PowerHA SystemMirror cluster. In PowerHA SystemMirror Version 7.2.3, or later, the necessary PowerHA SystemMirror resources, such as resource groups, service addresses, application start and stop scripts, and application monitors, are created for you automatically by the Smart Assist after you provide the required information through the wizard.

GUI Server High Availability

You can configure the PowerHA SystemMirror GUI server to make it highly available within the cluster by setting the GUI Server High Availability option to Enabled.

Additional Information

• Customers who move the host name of a node when their application moves must be aware that this can cause some complications with the GUI. We’ve added code in PowerHA to automatically handle this, as long as the host name is changed and /etc/hosts is updated appropriately. However, short-term and temporary host name changes are not handled at this time.
• To add a cluster to the GUI successfully, make sure that SSH is not prompting for any unexpected input (except prompting for a password or passphrase). To test this on the GUI server you can run the following script ssh <REMOTE_NODE> hostname, where <REMOTE_NODE> is the node that you are using to add the cluster to the GUI.
• The default port that the GUI server uses is 8080, which is used to connect you to the browser. The default port for the agents, that the server uses to communicate with them is 8081. If the firewall will not allow these ports, you will get communication errors.
• Clusters may only be managed by one GUI server.
• If you install the GUI server within a cluster, only install it on one of the nodes unless you are planning to use the new GUI high availability configuration utility to make the GUI server highly available in that cluster.
• When the Smart Assist SAP HANA operations delete all resource groups, the resource group that is created to keep the GUI server highly available is also deleted. You must repeat the process of making the GUI server highly available.
• The migration operation must be performed only after removing the high availability of the GUI server. The process of making the GUI server highly available must be repeated after the migration operation.