influxdb-bundle

Bundle service integration of official influxdb/influxdb-php client

Installation

First of all, you need to require this library through composer:

composer require algatux/influxdb-bundle

Then, enable the bundle on the AppKernel class:

// app/AppKernel.php

public function registerBundles()
{
    $bundles = array(
        // ...
        new Algatux\InfluxDbBundle\InfluxDbBundle(),
    );

    // ...

    return $bundles
}

Configuration

Here is the configuration reference:

influx_db:

    # If not defined, the first connection will be taken.
    default_connection:   ~
    connections:

        # Prototype
        name:

            # Your InfluxDB host address
            host:                 ~ # Required

            # Your InfluxDB database name
            database:             ~ # Required

            # Set it to true to activate the UDP connection
            udp:                  false
            udp_port:             4444
            http_port:            8086
            username:             ''
            password:             ''

If you have only one connection to configure, this can be simplified to this:

influx_db:
    # Your InfluxDB host address
    host:                 ~ # Required

    # Your InfluxDB database name
    database:             ~ # Required

    # Set it to true to activate the UDP connection
    udp:                  false
    udp_port:             4444
    http_port:            8086
    username:             ''
    password:             ''

Services

You can directly access to the InfluxDB\Database trough UDP or HTTP with those services:

$httpDatabase = $this->get('algatux_influx_db.connection.http'); // Default HTTP connection
$udpDatabase = $this->get('algatux_influx_db.connection.udp');   // Default HTTP connection

// Same as before.
$httpDatabase = $this->get('algatux_influx_db.connection.default.http');
$udpDatabase = $this->get('algatux_influx_db.connection.default.udp');

You can also retrieve them thanks to the registry:

$database = $this->get('algatux_influx_db.connection_registry')->getDefaultHttpConnection();
$database = $this->get('algatux_influx_db.connection_registry')->getDefaultUdpConnection();

// Same as before.
$database = $this->get('algatux_influx_db.connection_registry')->getHttpConnection('default');
$database = $this->get('algatux_influx_db.connection_registry')->getUdpConnection('default');

To manipulate the database, please read the official documentation for reading and writing.

Sending data to influx db trough events

Assuming this collection to send:

$time = new \DateTime();

$points = [new Point(
    'test_metric', // name of the measurement
    0.64, // the measurement value
    ['host' => 'server01', 'region' => 'italy'], // optional tags
    ['cpucount' => rand(1,100), 'memory' => memory_get_usage(true)], // optional additional fields
    $time->getTimestamp()
)];

Dispatch the event instance according to the chosen writing protocol:

// UDP
$container
    ->get('event_dispatcher')
    ->dispatch(InfluxDbEvent::NAME, new UdpEvent($points, Database::PRECISION_SECONDS));

// HTTP
$container
    ->get('event_dispatcher')
    ->dispatch(InfluxDbEvent::NAME, new HttpEvent($points, Database::PRECISION_SECONDS));

Or, if you prefer to defer the event:

// Deferred Events
// Collect your measurements during the request and make only one write to influxdb.
// Deferred events are catched and "stored". Than on the kernel.terminate event one write per
// event type and precision will be fired.

// UDP
$container
    ->get('event_dispatcher')
    ->dispatch(InfluxDbEvent::NAME, new DeferredUdpEvent($points, Database::PRECISION_SECONDS));

// HTTP
$container
    ->get('event_dispatcher')
    ->dispatch(InfluxDbEvent::NAME, new DeferredHttpEvent($points, Database::PRECISION_SECONDS));

If you want to write to another connection than the default, you must specify it:

// UDP
$container
    ->get('event_dispatcher')
    ->dispatch(InfluxDbEvent::NAME, new UdpEvent($points, Database::PRECISION_SECONDS, 'other_connection'));

// HTTP
$container
    ->get('event_dispatcher')
    ->dispatch(InfluxDbEvent::NAME, new HttpEvent($points, Database::PRECISION_SECONDS, 'other_connection'));

Commands

Some commands are provided:

• algatux:influx:database:create: To create the database.
• algatux:influx:database:drop: To drop the database.

To get more information, run:

./app/console help <command>

Form types

This bundle provides several pre-defined form types. They are useful but optional.

If you want to use them, you have to require the symfony/form package.

Description of each of them is on the class doc block. Here is a short usage example:

$form
    ->add('measurement', MeasurementType::class, [
        'connection' => 'default' // Optional: The connection you want to use.
    ])
    ->add('fields', FieldKeyType::class, [
        'measurement' => 'cpu', // The concerned measurement.
        'multiple' => true, // Parent type is ChoiceType. You can use parent option like multiple.
    ])
    ->add('tags', TagKeyType::class, [
        'measurement' => 'cpu',
        'exclude_host' => false, // True by default. Excludes the 'host' choice value.
        'multiple' => true,
    ])
    ->add('tag_value', TagValueType::class, [
        'measurement' => 'disk',
        'tag_key' => 'fstype', // The related tag key.
    ])
;