Nagios Plugin Configuration

Nagios Plugin Configuration

Configure Access to Nagios

The following should be set in /etc/vitrage/vitrage.conf, under [nagios] section:

Name Description Default Value
user Nagios user  
password Nagios password  
url Nagios url for querying the data  
config_file Nagios configuration file /etc/vitrage/nagios_conf.yaml
changes_interval Interval of checking changes in the configuration files 30 seconds

Note: To avoid issues with paging, it is recommended for the URL to be of the form http://<nagios site url>/cgi-bin/status.cgi, which returns all the nagios tests.

Nagios access configuration - example

When installing Nagios on devstack with IP 10.20.30.40, following the instructions here, this would be the correct configuration:

[nagios]
user = omdadmin
password = omd
url = http://10.20.30.40:54321/my_site/nagios/cgi-bin/status.cgi
config_file = /etc/vitrage/nagios_conf.yaml

Configure Nagios Host Mapping

Nagios tests are defined in a table with columns: Host, Service, Status, Last Check, etc.

A Nagios “host” is not necessarily a resource of type “nova.host”. It can also be an instance, switch, or other resource types. nagios_conf.yaml is used to map each Nagios host to a Vitrage resource.

Format

nagios:
 - nagios_host: <Host as appears in Nagios>
   type: <resource type in Vitrage>
   name: <resource name in Vitrage>

 - nagios_host: <Host as appears in Nagios>
   type: <resource type in Vitrage>
   name: <resource name in Vitrage>
 ...

Note that for ease of use, there is support for wildcards in the “nagios_host” value, and references to the actual value for a given wildcard match. See Example 2 below.

Example 1

The following example is for a system with two hosts. In nagios they are named compute-0, compute-1, and in nova they are named host-1, host-2.

nagios:
 - nagios_host: compute-0
   type: nova.host
   name: host1

 - nagios_host: compute-1
   type: nova.host
   name: host2

Example 2

The following file will
  • map all Nagios hosts named host-<some_suffix> or <some_prefix>-devstack to resources of type nova.host with the same name.
  • map all Nagios hosts named instance-<some_suffix> to nova.instance resources.

Note how the ${nagios_host} references the instantiation of the regex defined in nagios_host.

nagios:
 - nagios_host: host-(.*)
   type: nova.host
   name: ${nagios_host}

 - nagios_host: (.*)-devstack
   type: nova.host
   name: ${nagios_host}

 - nagios_host: instance-(.*)
   type: nova.instance
   name: ${nagios_host}
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