docker-compose-port

Find the ip and port of a docker-compose service

This is super-useful if you want to use docker-compose locally to run servers, but want to be able to easily find the real IP and Port to connect to them.

Installation

This module is installed via npm:

$ npm install docker-compose-port

Notes

This module expects docker-machine and docker-compose to be in your $PATH.

Example Usage

Say you have a web server defined in your docker-compose.yml file:

# docker-compose.yml 
www:
  image: nginx
  ports:
    - 80
  environment:
    NGINX_PORT: "80"

To get the IP and port to connect to it from your node code:

var dockerComposePort = require('docker-compose-port'),
    request = require('request');
 
dockerComposePort('www', 80)
  .then(function (server) {
    request.get('http://' + server.ip + ':' + server.port + '/',
      function (err, res, body) {
        if (err) throw err;
        console.log(body);
        // ... <h1>Welcome to nginx!</h1> ...
      });
  });

By default it will connect to your active docker-machine host.

You can tell it to connect to a different docker-machine host by passing that through as the initial parameter.

var dockerComposePort = require('docker-compose-port'),
    request = require('request');
 
// connect to dev server in AWS
dockerComposePort('dev-aws', 'www', 80)
  .then(function (server) {
    request.get('http://' + server.ip + ':' + server.port + '/',
      function (err, res, body) {
        if (err) throw err;
        console.log(body);
        // ... <h1>Welcome to nginx!</h1> ...
      });
  });

API

dockerComposePort([machine], service, port)

Connect to the specified docker-compose machine, service and port.

If machine is not provided, it will default to the "active" docker machine.

dockerIp([machine])

Get the IP of a given docker-machine.

If machine is not provided, it will default to the "active" docker machine.

Eg:

var dockerIp = require('docker-compose-port').dockerIp;
dockerIp()
  .then(console.log);
// 192.168.99.200j

dockerPort(service, port)

Gets the actual port for the service on the active docker host.

Eg:

var dockerPort = require('docker-compose-port').dockerPort;
dockerPort('www', 80)
  .then(console.log);
// 32774