mydockerjs

mydockerjs

A javascript utility library for docker and docker-compose, it provides a simple javascript wrapper in order to execute docker commands and an api in order to use Docker with a node server.

Getting Started

npm install --save mydockerjs 

to use in your projects.

The library provides :

• docker : a docker js library in order to execute docker commands
• imageMgr : an image util library to retrieve informations about installed docker images and push / pull images
• dockerCompose : a docker compose library to run docker compose commands and parse json objects in yaml docker-compose syntax

If you want to test, to edit or to try example:  

git clone https://github.com/giper45/docker-js.git 

in examples dir you'll find some example:

cd examples; 
node <namejs> 

Prerequisites

In order to use you should first install docker engine and docker-compose . The library also uses curl .

Windows Support (beta)

Version 1.8.0 and later supports the WindowDockerToolbox. In order to use it you've to run node inside the DockerToolbox Virtual Machine, then everything should work.

Library Limitations and future improvements

• Windows: There is no support for HyperV Windows 10 Pro version but only Docker Toolbox.

• Linux/Mac and docker-remote-API: Library uses the docker remote api version 24 and connects itself to /var/run/docker.sock unix socket. Actually there is no way to change these default parameters

• Windows and docker-remote-API: If you're using Docker Toolbox there is an HTTPS connection to manage and certificates are required. Library uses default paths in order to find these parameters:

  • Default Docker IP: 192.168.99.100

  • Default Docker listening port: 2376

  • Certificates path: %HOMEPATH%/.docker/machine/machines/default

Examples

All the api provides a simple syntax with callback function and params options :

function nameF(dependentFunctionParameters, callback, paramsInput)

Docker utils

Some utility function Import:

const du = require('mydockerjs').dockerUtils;

Check if dockerEngine is running:

  du.isDockerEngineRunning((err, isRunning) => {
      //DO SOMETHING
  }); 

Check if docker-cli / docker-compose commands are installed:

//Docker CLI
 // ASYNC MODE 
 du.isDockerCliInstalled((err, isInstalled) => {
       // DO SOMETHING
  }); 
 // SYNC MODE
   du.isDockerCliInstalledSync() //Return true if docker Cli is installed 
   
// Docker COMPOSE
 //ASYNC MODE
 du.isDockerComposeInstalled((err, isInstalled) => {
      // DO SOMETHING
   }); 
 //SYNC MODE
 du.isDockerComposeInstalledSync()

Docker images  

Import :

const dockerImages = require('mydockerjs').imageMgr

Get images name :

//Get image names  
dockerImages.getNames(function(err, json) {
  utils.print(err,json)}, {onlytagged:true});

Get detailed list :

//Get detailed list of images in javascript object
dockerImages.getDetailedList(function(err, data) {
  utils.print(err,data);
})

Get jsonList:

//Get json list of images
dockerImages.getJSONList(function(err, data) {
  utils.print(err, data);
})

Remove untagged images :

dockerImages.removeUntagged(function(err, data) {
utils.print(err, data);
})

Each get function receives a callback and a paramsInput

Available options for the paramsInput are :

• onlytagged: if true returns only tagged images
• filterLabel : TBD

Docker library

Import :

const dockerJS = require('mydockerjs').docker 

Get active containers :

  dockerJS.ps(function(err, dockerContainers) {
    if(err) console.log(err) 
    else console.log(dockerContainers)
  })  

Remove all unactive containers :

dockerJS.rmAll(function(err, data) {
  utils.print(err, data) 
})

Run a container :

dockerJS.run('hello-world', function(err, data) {
  if(err) {   
    console.log("Some err:") 
    console.log(data) 
  }   
  else { 
    console.log(data)
  }   
})

run function accept imageName, callback and paramsInput. Available options :

• detached : if true add -d flag to docker run
• cmd : add a command to the end docker run
• name : add a name to running container

Example :

dockerJS.run('daindragon2/debian_useradd', function(err, data) {
  if(err) {   
   console.log("some error");
   console.log(err); 
  }   
else {   
 console.log("runned") 
 console.log(data) 
 //Print running containers
 dockerJS.ps(function(err, dockerContainers) {
  if(err)  console.log(err) 
  else console.log(dockerContainers)
 })  
 }   
}, {name:"theContainer", detached:true, cmd:'bash'})

Docker exec a command :

dockerJS.exec(nameContainer, command, callback, paramsInput) 

Available options :

• detached: if true run the command in detached mode

Stop all containers:

  dockerJS.stopAll(function(err, data) {
   utils.print(err, data)  
  })  

Start all containers :

  dockerJS.startAll(function(err, data) {
  utils.print(err, data)  
})  

Create a new network :

var flags = { 
  driver : 'bridge',
  subnet : '192.168.1.1/24'
 }   

dockerJS.createNetwork("testRete", function(err, data) {
  utils.print(err, data) 
}, flags) 
        

Remove network :

   var name = 'testRete' 
     dockerJS.removeNetwork(name, utils.print)

Network prune (destroy all inactive networks) :

 dockerJS.networkPrune(utils.print) 

Network List :

  dockerJS.networkList(utils.print)

Get infos about a container :

  //Select an existsent container
 name="existentContainer"
 dockerJS.getInfoContainer(name, utils.print)

docker-compose

To use :

  dockerComposer = require('mydockerjs').dockerComposer

The functions follows this convention :

dockerComposer.functionName(
  pathContainingDockerComposeYaml, 
  callback,
  dockerComposeLogF
 )

where pathContainingDockerComposeYaml where is located the docker-compose yaml that you want to up / down, callback is called when the docker-compose command finishes , dockerComposeLogF is a function called each time that docker-compose write a newline on the console (docker-compose writes all logs on stderr )

Check if a docker-compose lab is Running :

dockerComposer.isRunning(path, (err, isRunning) => {
 if(err) console.log(err); 
 else if (isRunning) console.log(path+' is running'); 
 else console.log(path+' is not running'); 

}

docker-compose up :

 dockerComposer.up(pathExample, utils.print, function(dataline) {                                                                                                                             
   console.log(dataline)                                                                                                                                                                
 })     

docker-compose down:

 dockerComposer.down(pathExample, utils.print, function(dataline) {                                                                                                                             
  console.log(dataline)                                                                                                                                                                    });     

docker-compose exec:

const params = { detached: false };
const dockerComposer = require('mydockerjs').dockerComposer;
const processRef = dockerComposer.exec(PATH_DOCKER_COMPOSE, CONTAINER_NAME, COMMAND, (err) => {
  console.log('ERR:');
  console.log(err);
}, params, (dataline) => {
  console.log(dataline);
});

docker-compose start : TBD

docker-compose stop : TBD

Contributing :

Eslint with a relaxed version of Airbnb is used for syntax checking (https://github.com/airbnb/javascript ). Look at the .eslintrc for more informations about which rules are turned off. Before to send ant contribute pls check your code with eslint . Use github for any issue or improvement you like.

• Fork it!
• Create your feature branch: git checkout -b my-new-feature
• Check
• Commit your changes: git commit -am 'Add some feature'
• Push to the branch: git push origin my-new-feature
• Submit a pull request

Running the tests

TBD

License

MIT Licensed