Not another Node.js Docker Remote API module.
dockerode
objectives:
- 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 aladocker run
. - tests -
dockerode
really aims to have a good test set, allowing to followDocker
changes easily, quickly and painlessly. - feature-rich - There's a real effort in keeping All
Docker
Remote API features implemented and tested. - interfaces - Features callback and promise based interfaces, making everyone happy :)
npm install dockerode
- Input options are directly passed to Docker. Check Docker 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.
To use dockerode
first you need to instantiate it:
var Docker = require('dockerode');
var docker = new Docker({socketPath: '/var/run/docker.sock'});
var docker1 = new Docker(); //defaults to above if env variables are not used
var docker2 = new Docker({host: 'http://192.168.1.10', port: 3000});
var docker3 = new Docker({protocol:'http', host: '127.0.0.1', port: 3000});
var docker4 = new Docker({host: '127.0.0.1', port: 3000}); //defaults to http
//protocol http vs https is automatically detected
var docker5 = new Docker({
host: '192.168.1.10',
port: process.env.DOCKER_PORT || 2375,
ca: fs.readFileSync('ca.pem'),
cert: fs.readFileSync('cert.pem'),
key: fs.readFileSync('key.pem'),
version: 'v1.25' // required when Docker >= v1.13, https://docs.docker.com/engine/api/version-history/
});
var docker6 = new Docker({
protocol: 'https', //you can enforce a protocol
host: '192.168.1.10',
port: process.env.DOCKER_PORT || 2375,
ca: fs.readFileSync('ca.pem'),
cert: fs.readFileSync('cert.pem'),
key: fs.readFileSync('key.pem')
});
//using a different promise library (default is the native one)
var docker7 = new Docker({
Promise: require('bluebird')
//...
});
//...
// create a container entity. does not query API
var container = docker.getContainer('71501a8ab0f8');
// query API for container info
container.inspect(function (err, data) {
console.log(data);
});
container.start(function (err, data) {
console.log(data);
});
container.remove(function (err, data) {
console.log(data);
});
// promises are supported
docker.createContainer({
Image: 'ubuntu',
AttachStdin: false,
AttachStdout: true,
AttachStderr: true,
Tty: true,
Cmd: ['/bin/bash', '-c', 'tail -f /var/log/dmesg'],
OpenStdin: false,
StdinOnce: false
}).then(function(container) {
return container.start();
}).then(function(container) {
return container.resize({
h: process.stdout.rows,
w: process.stdout.columns
});
}).then(function(container) {
return container.stop();
}).then(function(container) {
return container.remove();
}).then(function(data) {
console.log('container removed');
}).catch(function(err) {
console.log(err);
});
You may also specify default options for each container's operations, which will always be used for the specified container and operation.
container.defaultOptions.start.Binds = ["/tmp:/tmp:rw"];
docker.listContainers(function (err, containers) {
containers.forEach(function (containerInfo) {
docker.getContainer(containerInfo.Id).stop(cb);
});
});
docker.buildImage('archive.tar', {t: imageName}, function (err, response){
//...
});
docker.buildImage({
context: __dirname,
src: ['Dockerfile', 'file1', 'file2']
}, {t: imageName}, function (err, response) {
//...
});
docker.createContainer({Image: 'ubuntu', Cmd: ['/bin/bash'], name: 'ubuntu-test'}, function (err, container) {
container.start(function (err, data) {
//...
});
});
//...
//tty:true
docker.createContainer({ /*...*/ Tty: true /*...*/ }, function(err, container) {
/* ... */
container.attach({stream: true, stdout: true, stderr: true}, function (err, stream) {
stream.pipe(process.stdout);
});
/* ... */
}
//tty:false
docker.createContainer({ /*...*/ Tty: false /*...*/ }, function(err, container) {
/* ... */
container.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);
});
/* ... */
}
docker.createImage({fromImage: 'ubuntu'}, function (err, stream) {
stream.pipe(process.stdout);
});
//...
There is also support for HTTP connection hijacking, which allows for cleaner interactions with commands that work with stdin and stdout separately.
docker.createContainer({Tty: false, /*... other options */}, function(err, container) {
container.exec({Cmd: ['shasum', '-'], AttachStdin: true, AttachStdout: true}, function(err, exec) {
exec.start({hijack: true, stdin: true}, function(err, stream) {
// shasum can't finish until after its stdin has been closed, telling it that it has
// read all the bytes it needs to sum. Without a socket upgrade, there is no way to
// close the write-side of the stream without also closing the read-side!
fs.createReadStream('node-v5.1.0.tgz', 'binary').pipe(stream);
// Fortunately, we have a regular TCP socket now, so when the readstream finishes and closes our
// stream, it is still open for reading and we will still get our results :-)
docker.modem.demuxStream(stream, process.stdout, process.stderr);
});
});
});
image
- container imagecmd
- command to be executedstream
- 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 (optional, promise will be returned if not used).
//callback
docker.run('ubuntu', ['bash', '-c', 'uname -a'], process.stdout, function (err, data, container) {
console.log(data.StatusCode);
});
//promise
docker.run(testImage, ['bash', '-c', 'uname -a'], process.stdout).then(function(container) {
console.log(container.output.StatusCode);
return container.remove();
}).then(function(data) {
console.log('container removed');
}).catch(function(err) {
console.log(err);
});
or, if you want to split stdout and stderr (you must to pass Tty:false
as an option for this to work)
docker.run('ubuntu', ['bash', '-c', 'uname -a'], [process.stdout, process.stderr], {Tty:false}, function (err, data, container) {
console.log(data.StatusCode);
});
If you provide a callback, run
will return an EventEmitter supporting the following events: container, stream, data.
If a callback isn't provided a promise will be returned.
docker.run('ubuntu', ['bash', '-c', 'uname -a'], [process.stdout, process.stderr], {Tty:false}, function (err, data, container) {
//...
}).on('container', function (container) {
container.defaultOptions.start.Binds = ["/tmp:/tmp:rw"];
});
repoTag
- container image name (optionally with tag)myrepo/myname:withtag
opts
- extra options passed to create image.callback
- callback called when execution ends.
docker.pull('myrepo/myname:tag', function (err, stream) {
// streaming output from pull...
});
docker-modem
already base64 encodes the necessary auth object for you.
var auth = {
username: 'username',
password: 'password',
auth: '',
email: '[email protected]',
serveraddress: 'https://index.docker.io/v1'
};
docker.pull('tag', {'authconfig': auth}, function (err, stream) {
//...
});
If you already have a base64 encoded auth object, you can use it directly:
var auth = { key: 'yJ1J2ZXJhZGRyZXNzIjoitZSI6Im4OCIsImF1dGgiOiIiLCJlbWFpbCI6ImZvbGllLmFkcmc2VybmF0iLCJzZX5jb2aHR0cHM6Ly9pbmRleC5kb2NrZXIuaW8vdZvbGllYSIsInBhc3N3b3JkIjoiRGVjZW1icmUjEvIn0=' }
followProgress
- allows to fire a callback only in the end of a stream based process. (build, pull, ...)
//followProgress(stream, onFinished, [onProgress])
docker.pull(repoTag, function(err, stream) {
//...
docker.modem.followProgress(stream, onFinished, onProgress);
function onFinished(err, output) {
//output is an array with output json parsed objects
//...
}
function onProgress(event) {
//...
}
});
demuxStream
- demux stdout and stderr
//demuxStream(stream, stdout, stderr)
container.attach({
stream: true,
stdout: true,
stderr: true
}, function handler(err, stream) {
//...
container.modem.demuxStream(stream, process.stdout, process.stderr);
//...
});
docker pull ubuntu:latest
to prepare your system for the tests.- Tests are implemented using
mocha
andchai
. Run them withnpm test
.
Check the examples folder for more specific use cases examples.
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.