shipyard/dockerode

Name: dockerode

Owner: Shipyard

Description: Not just another Docker Remote API node.js module

Created: 2015-11-09 05:13:58.0

Updated: 2016-07-01 17:37:37.0

Pushed: 2015-11-10 13:43:51.0

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Size: 1180

Language: JavaScript

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README

dockerode

Not another Node.js Docker Remote API module.

Why dockerode is different from other Docker node.js modules:

• streams - dockerode does NOT break any stream, it passes them to you allowing for some stream voodoo.
• stream demux - Supports optional demultiplexing.
• entities - containers, images and execs are defined entities and not random static methods.
• run - dockerode allow you to seamless run commands in a container ala docker run.
• tests - dockerode really aims to have a good test set, allowing to follow Docker changes easily, quickly and painlessly.
• feature-rich - There's a real effort in keeping All Docker Remote API features implemented and tested.

Installation

npm install dockerode

Usage

• Input options are directly passed to Docker. Check Docker Remote API documentation for more details.
• Return values are unchanged from Docker, official Docker documentation will also apply to them.
• Check the tests and examples folder for more examples.

Getting started

To use dockerode first you need to instantiate it:

Docker = require('dockerode');
docker = new Docker({socketPath: '/var/run/docker.sock'});
docker1 = new Docker(); //defaults to above if env variables are not used
docker2 = new Docker({host: 'http://192.168.1.10', port: 3000});
docker3 = new Docker({protocol:'http', host: '127.0.0.1', port: 3000});
docker4 = new Docker({host: '127.0.0.1', port: 3000}); //defaults to http

otocol http vs https is automatically detected
docker5 = new Docker({
st: '192.168.1.10',
rt: process.env.DOCKER_PORT || 2375,
: fs.readFileSync('ca.pem'),
rt: fs.readFileSync('cert.pem'),
y: fs.readFileSync('key.pem')


docker6 = new Docker({
otocol: 'https', //you can enforce a protocol
st: '192.168.1.10',
rt: process.env.DOCKER_PORT || 2375,
: fs.readFileSync('ca.pem'),
rt: fs.readFileSync('cert.pem'),
y: fs.readFileSync('key.pem')

.

Manipulating a container:

reate a container entity. does not query API
container = docker.getContainer('71501a8ab0f8');

uery API for container info
ainer.inspect(function (err, data) {
nsole.log(data);


ainer.start(function (err, data) {
nsole.log(data);


ainer.remove(function (err, data) {
nsole.log(data);


.

You may also specify default options for each container's operations, which will always be used for the specified container and operation.

ainer.defaultOptions.start.Binds = ["/tmp:/tmp:rw"];

Stopping all containers on a host

er.listContainers(function (err, containers) {
ntainers.forEach(function (containerInfo) {
docker.getContainer(containerInfo.Id).stop(cb);
;

Building an Image

er.buildImage('archive.tar', {t: imageName}, function (err, response){
...

Creating a container:

er.createContainer({Image: 'ubuntu', Cmd: ['/bin/bash'], name: 'ubuntu-test'}, function (err, container) {
ntainer.start(function (err, data) {
//...
;

.

Streams goodness:

y:true
er.createContainer({ /*...*/ Tty: true /*...*/ }, function(err, container) {

 ... */

ntainer.attach({stream: true, stdout: true, stderr: true}, function (err, stream) {
stream.pipe(process.stdout);
;

 ... */


y:false
er.createContainer({ /*...*/ Tty: false /*...*/ }, function(err, container) {

 ... */

ntainer.attach({stream: true, stdout: true, stderr: true}, function (err, stream) {
//dockerode may demultiplex attach streams for you :)
container.modem.demuxStream(stream, process.stdout, process.stderr);
;

 ... */


er.createImage({fromImage: 'ubuntu'}, function (err, stream) {
ream.pipe(process.stdout);


.

Equivalent of docker run in dockerode:

• image - container image
• cmd - command to be executed
• stream - stream(s) which will be used for execution output.
• create_options - options used for container creation. (optional)
• start_options - options used for container start. (optional)
• callback - callback called when execution ends.

er.run('ubuntu', ['bash', '-c', 'uname -a'], process.stdout, function (err, data, container) {
nsole.log(data.StatusCode);

or, if you want to split stdout and stderr (you must to pass Tty:false as an option for this to work)

er.run('ubuntu', ['bash', '-c', 'uname -a'], [process.stdout, process.stderr], {Tty:false}, function (err, data, container) {
nsole.log(data.StatusCode);

Run also returns an EventEmitter supporting the following events: container, stream, data. Allowing stuff like this:

er.run('ubuntu', ['bash', '-c', 'uname -a'], [process.stdout, process.stderr], {Tty:false}, function (err, data, container) {
...
n('container', function (container) {
ntainer.defaultOptions.start.Binds = ["/tmp:/tmp:rw"];

Equivalent of docker pull in dockerode:

• repoTag - container image name (optionally with tag) myrepo/myname:withtag
• opts - extra options passed to create image.
• callback - callback called when execution ends.

er.pull('myrepo/myname:tag', function (err, stream) {  
 streaming output from pull...

Pull from private repos

docker-modem already base64 encodes the necessary auth object for you.

auth = {
ername: 'username',
ssword: 'password',
th: '',
ail: 'your@email.email',
rveraddress: 'https://index.docker.io/v1'


er.pull('tag', {'authconfig': auth}, function (err, stream) {
...

If you already have a base64 encoded auth object, you can use it directly:

auth = { key: 'yJ1J2ZXJhZGRyZXNzIjoitZSI6Im4OCIsImF1dGgiOiIiLCJlbWFpbCI6ImZvbGllLmFkcmc2VybmF0iLCJzZX5jb2aHR0cHM6Ly9pbmRleC5kb2NrZXIuaW8vdZvbGllYSIsInBhc3N3b3JkIjoiRGVjZW1icmUjEvIn0=' }

Helper functions

• followProgress - allows to fire a callback only in the end of a stream based process. (build, pull, …)

llowProgress(stream, onFinished, [onProgress])
er.pull(repoTag, function(err, stream) {
...
cker.modem.followProgress(stream, onFinished, onProgress);

nction onFinished(err, output) {
//output is an array with output json parsed objects
//...

nction onProgress(event) {
//...

• demuxStream - demux stdout and stderr

muxStream(stream, stdout, stderr)
ainer.attach({
ream: true,
dout: true,
derr: true
unction handler(err, stream) {
...
ntainer.modem.demuxStream(stream, process.stdout, process.stderr);
...

Tests

docker pull ubuntu:latest to prepare your system for the tests.

Tests are implemented using mocha and chai. Run them with npm test.

Examples

Check the examples folder for more specific use cases examples.

License

Pedro Dias - @pedromdias

Licensed under the Apache license, version 2.0 (the “license”); You may not use this file except in compliance with the license. You may obtain a copy of the license at:

http://www.apache.org/licenses/LICENSE-2.0.html

Unless required by applicable law or agreed to in writing, software distributed under the license is distributed on an “as is” basis, without warranties or conditions of any kind, either express or implied. See the license for the specific language governing permissions and limitations under the license.