Get docker container ip and port

index.js

// sudo docker run -it --rm -p 3000 -v /var/run/docker.sock:/var/run/docker.sock rwwa/test_service

var http = require('http');

var hostname = process.env['HOSTNAME'];
console.log('hostname: ' + hostname);

function getContainerInfo() {
	var options = {
		socketPath: '/var/run/docker.sock',
		method: 'GET',
		path: '/containers/' + hostname + '/json'
	};

	var req = http.request(options, function(res) {
		var response = '';
		res.on('error', function() {
			console.log('error...');
		});
		res.on('data', function(chunk) {
			console.log('receiving data...');
			response += chunk;
		});
		res.on('end', function() {
			console.log('closing...');
			return JSON.parse(response);
		});
	});

	req.end();
}

function extractIpPort(containerInfo) {
	var ip = containerInfo['NetworkSettings']['IPAddress'];
	var port = containerInfo['NetworkSettings']['Ports']['3000/tcp']['HostPort'];
	return {
		ip: ip,
		port: port
	};
}