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influxdb-v2 v0.0.7

A light-weight library to write datas to InfluxDB v2 and query it.

InfluxDB-v2

A light-weight library to write datas to InfluxDB v2 and query it.

It is created with simple goals in mind: be simple, efficient and easy to use.

If you like it, please star it! 🥰

Note that InfluxDB-v2 is compatible with InfluxDB v2 only. It does NOT work with InfluxDB v1.

Sponsors

InfluxDB-v2 is sponsored by Stackhero. If you are looking for powerful managed services, you should seriously consider Stackhero 🤓

Installation

With NPM: npm install --save influxdb-v2

With Yarn: yarn add influxdb-v2

Example

const Influxdb = require('influxdb-v2');

(async () => {

  const influxdb = new Influxdb({
    host: 'influxdb.example.com',
    token: 'myInfluxdbToken'
  });

  await influxdb.write(
    {
      org: 'myOrganization',
      bucket: 'myBucket'
    },
    [{
      measurement: 'web',
      fields: {
        load: 12.34
      }
    }]
  );

  const result = await influxdb.query(
    { org: 'myOrganization' },
    { query: 'from(bucket: "myBucket") |> range(start: -1h)' }
  );
  console.log(result);

})().catch(error => {
  console.error('\n🐞 An error occurred!', error);
  process.exit(1);
});

Usage

Import the library and initialize it:

const Influxdb = require('influxdb-v2');

const influxdb = new Influxdb({
  host: '', // [Required] your server IP or domain name, like `influxdb.example.com`
  // protocol: 'https', // `http` or `https`, default to `https`
  // port: 443, // if different than 80 (for http) or 443 (for https). Probably 8086 or 9999.
  token: '' // [Required] your InfluxDB token. You can create one in InfluxDB console in "Settings"/"Tokens"/"Generate".
  // fetchOptions: {} // Option passed to node-fetch
});

Write

Basic

You can write datas to InfluxDB simply like this:

influxdb.write(
  {
    org: '', // [Required] your organization. You can set `orgID` if you prefer to use the ID
    bucket: '', // [Required] your bucket
  },
  [{
    measurement: '', // [Required] your measurement
    fields: {
      load: 12.34 // a field named "load" as an example, with a value of 12.34
    }
  }]
);

Handle timestamp

By default, the time recorded in InfluxDB is the time when you sent the request. This is probably not what you want to do. You can add a timestamp like this:

influxdb.write(
  {
    org: '', // [Required] your organization. You can set `orgID` if you prefer to use the ID
    bucket: '', // [Required] your bucket
    precision: 'ms' // precision of timestamp. Can be `ns` (nanoseconds), `us` (microseconds), `ms` (milliseconds) or `s` (seconds). The default is `ns`
  },
  [{
    measurement: '', // [Required] your measurement
    fields: {
      load: 12.34 // a field named "load" as an example, with a value of 12.34
    },
    timestamp: Date.now() // the timestamp in milliseconds, as defined in `precision`
  }]
);

Handle tags and multiple fields

You can add tags and multiple fields like this:

influxdb.write(
  {
    org: '', // [Required] your organization
    bucket: '', // [Required] your bucket
  },
  [{
    measurement: 'host', // [Required] your measurement

    // Define tags
    tags: {
      deviceId: 'gyh43',
      version: '1.2.3',
      location: 'factory-1'
    },

    // Define fields
    fields: {
      load: 12.34, // a field named "load" as an example, with a value of 12.34
      cpu: 42, // another name "cpu"
      battery: 65 // etc...
    }
  }]
);

Send multiple datas

And finally, you can send multiple datas at a same time:

influxdb.write(
  {
    org: '', // [Required] your organization. You can set `orgID` if you prefer to use the ID
    bucket: '', // [Required] your bucket
    precision: 's' // timestamp in seconds
  },
  [
    {
      measurement: '', // [Required] your measurement
      fields: {
        load: 12.34
      },
      timestamp: 1569513823
    },
    {
      measurement: '', // [Required] your measurement
      fields: {
        load: 23.45
      },
      timestamp: 1569513838
    }
  ]
);

Query

You can write flux queries simply like this:

const result = await influxdb.query(
  {
    org: '', // [Required] your organization. You can set `orgID` if you prefer to use the ID
  },
  {
    query: 'from(bucket: "myBucket") |> range(start: -1h)' // [Required] your flux query
  }
);

console.log(result);
/*
[
  [
    { result: '_result',
      table: '0',
      _start: 2019-09-26T16:36:48.868Z,
      _stop: 2019-09-26T16:37:48.868Z,
      _time: 2019-09-26T16:37:47.795Z,
      _value: 12.34,
      _field: 'fieldname1',
      _measurement: 'myMeasurement',
      tagname1: 'myTagvalue1',
      tagname2: 'myTagvalue2'
    }
  ],
  [
    { result: '_result',
      table: '1',
      _start: 2019-09-26T16:36:48.868Z,
      _stop: 2019-09-26T16:37:48.868Z,
      _time: 2019-09-26T16:37:47.795Z,
      _value: 23.45,
      _field: 'fieldname2',
      _measurement: 'myMeasurement',
      tagname1: 'myTagvalue1',
      tagname2: 'myTagvalue2'
    }
  ]
]
*/

Get RAW result

By default InfluxDB-v2 will parse the result of queries. If you prefer to get the RAW result (CSV), just set the parameter csv to true.

const result = await influxdb.query(
  {
    org: '', // [Required] your organization. You can set `orgID` if you prefer to use the ID
    csv: true // get the plain text (CSV) result
  },
  {
    query: 'from(bucket: "myBucket") |> range(start: -1h)' // [Required] your flux query
  }
);

console.log(result); // plain text (CSV) result
/*
,result,table,_start,_stop,_time,_value,_field,_measurement,tagname1,tagname2
,_result,0,2019-09-26T16:36:48.868439105Z,2019-09-26T16:37:48.868439105Z,2019-09-26T16:37:47.795Z,12.34,fieldname1,myMeasurement,myTagvalue1,myTagvalue2

,result,table,_start,_stop,_time,_value,_field,_measurement,tagname1,tagname2
,_result,1,2019-09-26T16:36:48.868439105Z,2019-09-26T16:37:48.868439105Z,2019-09-26T16:37:47.795Z,23.45,fieldname2,myMeasurement,myTagvalue1,myTagvalue2


*/

Handle self signed certificates

influxdb-v2 uses fetch to communicate with InfluxDB API. You can pass options to fetch using fetchOptions in the constructor.

You can use a defined CA certificate like this:

const https = require('https');

const influxdb = new Influxdb({
  host: '',
  token: '',
  fetchOptions: {
    agent: new https.Agent({
      ca: [ fs.readFileSync('yourCaFile.ca') ],
    })
  }
});

You can ignore certificate checks too. ⚠️ It is not recommended at all and expose your to MITM attacks!

const https = require('https');

const influxdb = new Influxdb({
  host: '',
  token: '',
  fetchOptions: {
    agent: new https.Agent({
      rejectUnauthorized: false
    })
  }
});
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