Thanks for your response Hugo.
In this case I have service checks named:
SSH # uses check_ssh plugin
SNMP # gets a low-latency MIB to ensure SNMPd is answering
SNMP-- $DAEMON ## where $DAEMON is one of many processes that need to
be running on the host (each with its own service definition).
In this case SSH does not have any dependencies, it is to be the 'root'
check that all the other services should in the end rely on.
The wildcard matches all the process checks over SNMP, and are
(intended) to be dependent on the SNMP daemon running properly. The
event handlers for these particular services just SSH to the node and
restart the service. However to keep this clean I just wanted to make
sure that those aren't occuring _unless_ it was confirmed that SNMP and
SSH are already running (otherwise the node could be down hard, or it
could be responding to a simple death of one of its dependent processes)...
The root issue was an assumption on my part that the
service_dependencies did something they did not (i.e., re-checking
master states when a child failed a check).
Now that I realize I need to add a SCHEDULE_FORCED_SVC_CHECK to the
first run of the event handlers to force a re-check of the state of its
master service, I believe I can pull this off properly.
Cheers,
/eli
Hugo van der Kooij wrote:
On Thu, 8 Dec 2005, Eli Stair wrote:
SSH -- SNMP --\
- Ganglia
- NTP
define servicedependency{
host_name HOSTNAME1
service_description SSH
dependent_host_name HOSTNAME1
dependent_service_description SNMP
execution_failure_criteria w,p,u,c
notification_failure_criteria w,p,u,c
inherits_parent 1
}
Here you asume that if SSH fails because it depends on another service it
will also fail SNMP
I have not seen SSH being dependent on anything however in your
description. How a non exsiting parent will impact services is unknown to
me.
define servicedependency{
host_name HOSTNAME1
service_description SNMP
dependent_host_name HOSTNAME1
dependent_service_description SNMP--*
execution_failure_criteria w,p,u,c
notification_failure_criteria w,p,u,c
inherits_parent 1
}
Is this a real wildcard? Are they supported?
I would expect:
define servicedependency{
host_name HOSTNAME1
service_description SNMP
dependent_host_name HOSTNAME1
dependent_service_description NTP
execution_failure_criteria w,p,u,c
notification_failure_criteria w,p,u,c
inherits_parent 1
}
define servicedependency{
host_name HOSTNAME1
service_description SNMP
dependent_host_name HOSTNAME1
dependent_service_description Ganglia
execution_failure_criteria w,p,u,c
notification_failure_criteria w,p,u,c
inherits_parent 1
}
Hugo.
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