PNP Grafana Datasource

A Grafana backend datasource using PNP4Nagios to access RRD files.

Installation

Search for pnp in the Grafana plugins directory or simply use the grafana-cli command:

%> grafana-cli plugins install sni-pnp-datasource

Also OMD-Labs comes with this datasource included, so if you use OMD-Labs, everything is setup already.

Otherwise follow these steps:

%> cd var/grafana/plugins
%> git clone -b release-1.0.7  https://github.com/sni/grafana-pnp-datasource.git
%> restart grafana

Replace release-1.0.7 with the last available release branch.

PNP API

In order to make this datasource work, you need the pnp api. This is a separate project at the moment and will be part of the official pnp in the future. You can fetch the api.php from https://github.com/lingej/pnp-metrics-api and place it in your controler folder.

In a standard PNP setup, you could basically just download the api directly into the controller folder with a simple wget:

wget "https://github.com/lingej/pnp-metrics-api/raw/master/application/controller/api.php" \
     -O /usr/share/pnp4nagios/html/application/controllers/api.php

Adjust the output path to your installation.

Or simply use the PNP fork from https://github.com/ConSol-Monitoring/pnp which has added the api already.

Create Datasource

Add a new datasource and select:

- Type 'PNP'
- Url to pnp, ex.: 'https://localhost/sitename/pnp4nagios'

Example Dashboard

This datasource ships an example dashboard which gets you started and shows the internal PNP statistics.

Queries

Simply select host, service and label in the query editor. Regular expressions are supported in the host and service field by adding slashes like /.*/.

Variables

You may use the following variables in the alias field:

- $tag_host: will be replaced with the hostname
- $tag_service: will be replaced with the service name
- $tag_label: will be replaced with the label
- $tag_perflabel: same as label

All standard variables will also do.

Templating

There is basic templating variable support. There are 3 different querys available:

- $host:    hosts
- $service: services where host = /^$host$/
- $label:   labels where host = /^$host$/ and service = /^$service$/

Development

To test and improve the plugin you can run Grafana instance in Docker using following command (in the source directory of this plugin):

%> make dev

This will start a grafana container and a build watcher which updates the plugin is the dist/ folder.

The dev instance can be accessed at http://localhost:3000

You need to add the datasource manually.

Testing

For testing you can use the demo pnp instance at:

• URL: https://demo.thruk.org/demo4/pnp4nagios
• No authentication required

Create Release

How to create a new release:

%> export RELVERSION=1.0.9
%> export GRAFANA_API_KEY=...
%> vi package.json # replace version
%> vi CHANGELOG.md # add changelog entry
%> git commit -am "Release v${RELVERSION}"
%> git tag -a v${RELVERSION} -m "Create release tag v${RELVERSION}"
%> make GRAFANA_API_KEY=${GRAFANA_API_KEY} releasebuild
# create release here https://github.com/sni/grafana-pnp-datasource/releases/new
# submit plugin update here https://grafana.com/orgs/sni/plugins

Changelog

see CHANGELOG.md