opsi manual opsi version 4.0.2 - opsi Download - uib

opsi manual opsi version 4.0.2
20.2.2 Preconditions at the Nagios server
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As precondition you need a Nagios installation in the version 3.x or a Icinga Installation in the version 1.6 or higher.
For graphical output of performance data a pnp4nagios installation is required.
Further information you will find at:
www.nagios.org
www.icinga.org
www.pnp4nagios.org
20.3 Concept
The opsi-Nagios-Connector contains of two core components. At first we will discuss these core components.
20.3.1 opsi web service extension
The heart of the opsi-Nagios-Connector are extended features of the opsi web service. These web service extension
make it possible to run checks via web service on the opsi server. So the Nagios server calls checks via web service which
are executed on the opsi-server and the results come back to the Nagios server via opsi web service. The advantage of
this solution is that there is nearly nothing to do on the monitored opsi server.
The focus of the opsi web service extension lies on opsi specific checks like e.g. rollout monitoring. For the normal
server monitoring you should use still standard check methods.
20.3.2 opsi-client-agent extension
An other part of the opsi-Nagios-Connector is an extension of the opsi-client-agent.
In a opsi environment on every managed client runs a opsi-client-agent. With this extension you may use the opsiclient-agent
as Nagios agent as well. But in fact not all features of a standard Nagios agent like NSClient++ are
implemented at the opsi-client-agent. You may use the opsi-client-agent to run command line programs and send back
the output.
If you not use all functions like NSCA but rather some standard checks per plugin on the client or a set of own plugins
on the clients you can use the opsi-client-agent.
If you need more features for the client monitoring you should rollout a standard agent like NSClient++ via opsi.
The advantage of using the opsi-client-agent as Nagios agent is, that you don’t need an additional agent on the client
and that you don’t need any access data for the clients at the monitoring server. These data is not needed because
all check run via the opsi server. This makes the configuration a lot more easier.
20.4 opsi-checks
The following chapter explains the goals and configurations of the opsi-checks.
20.4.1 Some background information about where to run the checks
Monitoring administrators know the difference between active and passive checks.
With the opsi-Nagios-Connector we get a new difference: direct and indirect.
• direct:
The check which collects information about a client runs on that client, get the information direct from the client
and sends the information back.