Managing Clusters
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Using Console Commands
To online a specified resource on the most preferred node that is currently active:
1
As the
root
user, enter the following at the console command prompt of a cluster node:
cluster online
resource_name
To online a specified resource to a specific active node:
1
As the
root
user, enter the following at the console command prompt of a cluster node:
cluster online
resource_name
node_name
To unload a specified resource:
1
As the
root
user, enter the following at the console command prompt of a cluster node:
cluster offline
resource_name
8.6 Removing (Leaving) a Node from the Cluster
You can remove a node from a cluster so that the node is not visible to other servers in the cluster by
leaving the cluster.
1
Log in as the
root
user to the node in the cluster that you want to remove, then enter the
following at a terminal console prompt:
cluster leave
When the node has successfully left the cluster, the following message is displayed:
No longer a member of cluster
clustername
8.7 Joining a Node to the Cluster
You can add the node back to the cluster so that the node is again visible to other servers in the
cluster by joining the cluster.
1
Log in as the
root
user to the server that you want to join the cluster, then enter the following
at a terminal console prompt:
cluster join
8.8 Configuring the EVMS Remote Request
Timeout
Novell Cluster Services for Linux uses the EVMS Cluster Segment Manager for shared devices.
When load and unload scripts run, EVMS mounts or dismounts shared devices. The default timeout
for remote requests for EVMS is 12 seconds. If you have many shared devices to be mounted or
dismounted and the timeout is exceeded, you might see EVMS locking errors and some cluster
resources can go comatose.
You must increase the EVMS engine’s
remote_request_timeout
value if you have many shared
devices and it is taking longer than 12 seconds to process them as the load or unload scripts are run
for a cluster migration. The time needed varies with the number of shared devices that are being
processed. For example, for about 60 shared devices, set the timeout to 30 seconds.
