Managing Clusters
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8.2 Monitoring Cluster and Resource States
The
Cluster Manager
link in iManager gives you important information about the status of servers
and resources in your cluster.
1
In iManager, click
Cluster
, then click
Cluster Manager
.
2
Type the name of the desired cluster, or browse to locate and select the Cluster object.
A list of resources and resource states displays.
The master server in the cluster is identified by a yellow diamond in the middle of the server icon
( ). The master server is initially the first server in the cluster, but another server can become the
master if the first server fails.
Cluster servers and resources display the following icons for the different operating states:
Table 8-1
Cluster Operating States
When a resource is red, it is waiting for administrator intervention. When a resource is gray with no
break in the icon, either that server is not currently a member of the cluster or its state is unknown.
When a resource is blank or has no colored icon, it is unassigned, offline, changing state, or in the
process of loading or unloading.
The Epoch number indicates the number of times the cluster state has changed. The cluster state
changes every time a server joins or leaves the cluster.
Table 8-2
identifies the different resource states and gives descriptions and possible actions for each
state.
State
Icon
Description
Normal
A green ball indicates that the server or resource is online or running.
Stopped
A red ball with a horizontal white line indicates that the node is stopped.
Offline
A white ball with a horizontal red line indicates that the node is offline.
Critical
A white ball with a red X indicates that the node has failed or is comatose.
Warning
A white ball with a yellow diamond indicates that an alert condition has
occurred, and the resource needs administrator attention.
