[Wolves] Nagios Talk - Q&A Follow-Up Information
james at turnersoft.co.uk
Wed Jan 17 23:48:34 GMT 2007
The following points were not adequately addressed during tonight's talk:
1. Host and service dependencies
See the following page from the manual on what they are for and how to set
Similar to how specifying the network topology prevents unnecessary duplicate
notifications being sent out when a router outage occurs, service and host
dependencies prevent unnecessary notifications being sent out when hosts or
services that depend on each other fail. This dependency can be independent
of the physical network topology.
For example, the following two events might each cause a single notification
to be triggered, informing different support staff as appropriate:
- The SpodProject Wiki just crashed due to an application-specific error
- The back-end database server that several web sites (including SpodProject
Wiki) depend on just crashed, affecting them all
The second scenario might not involve notification or corrective action from
staff responsible for maintaining SpodProject Wiki but not responsible for
the underlying database server itself.
(Hope that makes sense!)
2. Installing a non-obsolete Nagios version under Ubuntu:
The following page describes how to install the current version of Nagios
(2.6) from source on Ubuntu Edgy:
Aside: Notice preinstall step 2 - libgd2-dev - the equivalent to this got
forgotten by the Fedora Extras package maintainers, so none of the components
that create graphs/charts work in their supplied RPM! Until they fix this,
the easiest workaround is probably just to rebuild the package on a machine
with the correct libraries installed.
Slides to be published on the 'Net shortly.
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