8.2. Displaying Cluster and Service Status
Monitoring cluster and application service status can help identify and resolve problems in the cluster environment. The following tools assist in displaying cluster status information:
The clustat command
The clufence command
Log file messages
The cluster monitoring GUI
Note that status is representative of the cluster system on which an administrator is running a particular tool. To obtain comprehensive cluster status on all member, run the tools on all cluster systems.
 | Important |
|---|---|
Members that are not running the cluster software cannot determine or report the status of other members of the cluster. |
Cluster and service status includes the following information:
Cluster member system status
Heartbeat channel status
Service status and which cluster system is running the service or owns the service
Service monitoring status of the cluster system
The following tables describe how to analyze the status information shown by the Cluster Status Tool and clustat command.
| Member Status | Description |
|---|---|
| Active | The member system is communicating with other member systems and accessing the quorum partitions. |
| Inactive | The member system is unable to communicate with the other member system. |
Table 8-1. Member Status
| Service Status | Description |
|---|---|
| Running | The service resources are configured and available on the cluster system that owns the service. |
| Pending | The service has failed on a member and is pending start on another member. |
| Disabled | The service has been disabled, and does not have an assigned owner. |
| Stopped | The service not running; waiting for a member capable of starting service. |
| Failed | The service has failed to start on and the cluster cannot successfully stop the service. Refer to Section 4.8 Handling Failed Services for more information on failed services. |
Table 8-2. Service Status
To display a snapshot of the current cluster status from a shell prompt, invoke the clustat utility. Example output is as follows:
Cluster Status - clustertest 22:15:32 Quorum: Yes, view 36 Shared State: Shared Raw Device Driver v1.0 [Min. Size=1176064] Member Status ------------------ ---------- clu1 Active clu2 Active <-- You are here Service Status Owner (Last) Last Transition Chk Restarts -------------- -------- ---------------- --------------- --- -------- nfs_clutest started clu1 22:11:28 Jul 21 0 0 smb_clutest started clu2 22:13:06 Jul 21 0 0 |
To monitor the cluster and display status at specific time intervals from a shell prompt, invoke clustat with the -i time option, where time specifies the number of seconds between status snapshots. For example:
clustat -i 10 |