Red Hat Cluster for Enterprise Linux 5 Configuration page 63

is checked, the service is started automatically when a cluster is started and running. If
Autostart This Service is not checked, the service must be started manually any time the
cluster comes up from stopped state.
6. Run Exclusive checkbox — This sets a policy wherein the service only runs on nodes that
have no other services running on them. For example, for a very busy web server that is
clustered for high availability, it would would be advisable to keep that service on a node
alone with no other services competing for his resources — that is, Run Exclusive
checked. On the other hand, services that consume few resources (like NFS and Samba),
can run together on the same node without little concern over contention for resources. For
those types of services you can leave the Run Exclusive unchecked.
Note
Circumstances that require enabling Run Exclusive are rare. Enabling Run
Exclusive can render a service offline if the node it is running on fails and no
other nodes are empty.
7. Select a recovery policy to specify how the resource manager should recover from a ser-
vice failure. At the upper right of the Service Management dialog box, there are three Re-
covery Policy options available:
• Restart — Restart the service in the node the service is currently located. The default
setting is Restart. If the service cannot be restarted in the the current node, the service
is relocated.
• Relocate — Relocate the service before restarting. Do not restart the node where the
service is currently located.
• Disable — Do not restart the service at all.
8. Click the Add a Shared Resource to this service button and choose the a resource listed
that you have configured in Section 7, "Adding Cluster Resources".
Note
If you are adding a Samba-service resource, connect a Samba-service re-
source directly to the service, not to a resource within a service. That is, at the
Service Management dialog box, use either Create a new resource for this
service or Add a Shared Resource to this service; do not use Attach a
new Private Resource to the Selection or Attach a Shared Resource to
the selection.
9. If needed, you may also create a private resource that you can create that becomes a sub-
ordinate resource by clicking on the Attach a new Private Resource to the Selection but-
8. Adding a Cluster Service to the Cluster
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