Installation guide

Example D.6 . Service foo No rmal Failu re Reco very

</script>

</service>

Example D.7. Service foo Failu re Reco very wit h __independent_subtree At t rib u t e

</script>

</service>

In some circumstances, if a component of a service fails you may want to disable only that

component without disabling the entire service, to avoid affecting other services the use other

components of that service. As of the Red Hat Enterprise Linux 5.6 release, you can accomplish that

by using the __independent_subtree="2" attribute, which designates the independent subtree

as non-critical.

Note

You may only use the non-critical flag on singly-referenced resources. The non-critical flag

works with all resources at all levels of the resource tree, but should not be used at the top

level when defining services or virtual machines.

As of the Red Hat Enterprise Linux 5.6 release, you can set maximum restart and restart expirations

on a per-node basis in the resource tree for independent subtrees. To set these thresholds, you can

use the following attributes:

__max_restarts configures the maximum number of tolerated restarts prior to giving up.

__restart_expire_time configures the amount of time, in seconds, after which a restart is no

longer attempted.

D.5. Debugging and T est ing Services and Resource Ordering

You can debug and test services and resource ordering with the rg_test utility. rg_test is a

command-line utility that is run from a shell or a terminal (it is not available in Co n g a or system-

config-cluster.) Table D.2, “ rg_test Utility Summary” summarizes the actions and syntax for

the rg_test utility.

T ab le D.2. rg_test Ut ilit y Su mmary

HA Resou rce Behavior

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