Procedure for starting cluster services
You can start PowerHA® SystemMirror® cluster services.
About this task
To start PowerHA SystemMirror cluster services, as the root user, perform the following steps:
Procedure
- Enter
smit cl_admin - In SMIT, select PowerHA SystemMirror Services > Start Cluster Services and press Enter.
- Enter field values as follows:
Table 1. Start Cluster Services fields Field Value Start now, on system restart or both Indicate how you want to start cluster services when you commit the values on this panel by pressing Enter (now), when the operating system reboots by selecting on system restart, or on both occasions. Choosing on system restart or both means that the cluster services are always brought up automatically after a system reboot.
Note: When you start the PowerHA SystemMirror cluster services with the Manage Resource Group option set to Manually, and select the option both, the timing of a power loss or rebooting the node may affect whether the node is in the OFFLINE or UNMANAGED state after the system reboot.Start Cluster Services on these nodes Enter the name(s) of one or more nodes on which you want to start cluster services. Alternatively, you can select nodes from a picklist. Separate multiple nodes with a comma. Manage resource groups Automatically (default). PowerHA SystemMirror brings resource group(s) online according to the resource groups' configuration settings and the current cluster state and starts managing the resource group(s) and applications for availability. When you start PowerHA SystemMirror cluster services and set the Manage Resource Group option to Automatically, PowerHA SystemMirror automatically activates resource groups on the node(s) according to their policies and locations and also starts applications.
PowerHA SystemMirror may not necessarily start the application on the same node on which it is currently being run, if the application is already running. That is, when this option is selected, PowerHA SystemMirror determines on which node to bring a resource group online based on the configured resource group policies, resource group dependency configuration and available resources on the node. If you select this option while starting the cluster services, it is suggested to stop the applications and resources so that PowerHA SystemMirror can start them on the appropriate node.
See also Running corrective actions during verification.
Manually. PowerHA SystemMirror does not activate resource groups while the cluster services on the selected node are started. After you start cluster services, you can bring any resource groups online or offline, as needed, using the PowerHA SystemMirror Resource Group and Application Management SMIT menu (clRGmove). BROADCAST message at startup? Indicate whether you want to send a broadcast message to all nodes when the cluster services start. The default is true.
Startup Cluster Information Daemon? Indicate whether you want to start the clinfoES daemon. For example, if your application uses the Cluster Information daemon, if you use the clstat monitor, set this field to true. Otherwise, set it to false. The value that you enter in the Startup Cluster Information Services? field works in conjunction with the value you enter in the Start now, on system restart or both field. If you set either (or both) of the startup fields to true and the Start now, on system restart or both field to both , then the clinfoES daemon is also started whenever the cluster services are started.
Ignore Verification Errors? Set this value to false (the default) to stop all selected nodes from starting cluster services if verification finds errors on any node. Set this value to true to start cluster services even if verification finds errors on the specified nodes or in the cluster in general. This setting should be used with caution.
Automatically correct errors found during cluster start? This field is available only if the automatic verification and synchronization option has been enabled. For more information, see Modifying the startup of cluster services. - Select Interactively to receive prompts to correct certain errors as they are found during verification.
- Select No if you do not want PowerHA SystemMirror to correct any verification errors automatically. If you select No, you must correct errors, if any, manually.
- Select Yes if you want PowerHA SystemMirror to correct cluster verification errors automatically without first prompting you.
Note: Not all verification errors are automatically corrected; some must be corrected manually. For more information, see Automatic verification and synchronization. - Press Enter.
The system performs verification and synchronization as needed, and then starts the cluster services on the nodes specified, activating the cluster configuration that you have defined. The time that it takes the commands and scripts to run depends on your configuration (for example, the number of disks, the number of interfaces to configure, the number of file systems to mount, and the number of applications being started).
SMIT displays a command status window. Note that when the SMIT panel indicates the completion of the cluster startup, PowerHA SystemMirror processing of the resource groups in most cases has not yet completed. To verify that the processing has completed, use /usr/es/sbin/cluster/clstat, described in Monitoring a PowerHA SystemMirror cluster.