PHP implements the open source Grafana data visualization platform

Grafana is a popular open source data visualization platform that allows users to easily display complex data on dashboards. And PHP is a widely used scripting language for developing dynamic web applications. In this article, we will introduce how to implement the Grafana data visualization platform using PHP.

1. Install Grafana

First, we need to install the Grafana server. Binaries suitable for your operating system can be downloaded from Grafana's official website. The installation process is very simple, just follow the prompts and you're done.

2. Create a data source

In Grafana, a data source is a configuration that connects to an external data source. For example, you can connect to a time series database (such as InfluxDB) or an API endpoint to retrieve data. Here we will use InfluxDB as our data source.

To create a data source in Grafana, open the Grafana web interface and log in. Next, navigate to the Data Source option in the Configuration menu. Then, click the "Add Data Source" button, select "influxdb" as the type, and fill in the appropriate details such as database name, username, and password.

3. Create panels and indicators

In Grafana, a panel is an area where visual components (such as graphs, tables, and measurement indicators) are placed. Metrics are measurement points of source data.

To create panels and metrics in Grafana, open the Grafana web interface and log in. Next, click New Panel and choose a name. Next, click the Add a Query button to open the Query Editor.

In the query editor, enter the query statement to retrieve the data. For example, here is a sample query to retrieve InfluxDB metrics with a specific label:

SELECT mean("value") FROM "temperature" WHERE ("location" = 'room1') AND $timeFilter GROUP BY time ($__interval) fill(null)

You can add your own tags as needed, such as temperature, humidity, pressure, etc.

4. Grafana extension using PHP

Now we have created a configured Grafana server and have defined the metrics and panels we are interested in. Next, we will use PHP to extend Grafana's functionality.

To write a Grafana plug-in using PHP, please follow the steps below:

1. Put the code of the plug-in into the plugins folder in the Grafana installation directory.
2. Create a PHP file, such as "plugin.php", and write code in it to extend Grafana.

The following is a simple plug-in sample code:

require_once('/path/to/Grafana/src/grafana.php' );

$grafana = new Grafana();

$dashboard = $grafana->dashboard('TestDashboard');
$dashboard->addPanel('TestPanel' , 1, 1)

      ->setPanelType('graph')
      ->setQuery('SELECT mean("value") FROM "temperature" WHERE ("location" = 'room1') AND $timeFilter GROUP BY time($__interval) fill(null)')
      ->setVisualization('graph');

$grafana->register($dashboard);

?>

This code will create a Grafana named "TestDashboard" Dashboard and create a panel called "TestPanel" on that panel. It will then define a query called "graph".

Finally, the code will register the dashboard into Grafana by calling the "register()" method.

5. Summary

In this article, we introduced how to use PHP to extend the functionality of Grafana. We first installed the Grafana server and then defined the metrics and panels we were interested in. Finally, we wrote PHP code to extend Grafana functionality and add new panels and queries to it. Through these steps, we can build Grafana into the flexible data visualization platform we need.

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