pkgcloud

pkgcloud

pkgcloud is a standard library for node.js that abstracts away differences among multiple cloud providers.

• Getting started
  • Basic APIs
  • Unified Vocabulary
  • Supported APIs
• Compute
• Storage
  • Uploading Files
  • Downloading Files
• Database
• Fine Print
  • Installation
  • Tests
  • Code Coverage
  • Contribute!
  • Roadmap

Getting Started

Currently there are three service types which are handled by pkgcloud:

• Compute
• Storage
• Database

In our Roadmap, we plan to add support for DNS and CDN services, but these are not currently available.

Basic APIs for pkgcloud

Services provided by pkgcloud are exposed in two ways:

• By service type: For example, if you wanted to create an API client to communicate with a compute service you could simply:

  var client = require('pkgcloud').compute.createClient({
    //
    // The name of the provider (e.g. "joyent")
    //
    provider: 'provider-name',
    
    //
    // ... Provider specific credentials
    //
  });

• By provider name: For example, if you knew the name of the provider you wished to communicate with you could do so directly:

  var client = require('pkgcloud').providers.joyent.compute.createClient({
    //
    // ... Provider specific credentials
    //
  });

All API clients exposed by pkgcloud can be instantiated through pkgcloud[serviceType].createClient({ ... }) or pkcloud.providers[provider][serviceType].createClient({ ... }).

Unified Vocabulary

Due to the differences between the vocabulary for each service provider, pkgcloud uses its own unified vocabulary.

• Compute: Server, Image, Flavor
• Storage: Container, File

Supported APIs

Supporting every API for every cloud service provider in Node.js is a huge undertaking, but that is the long-term goal of pkgcloud. Special attention has been made to ensure that each service type has enough providers for a critical mass of portability between providers (i.e. Each service implemented has multiple providers).

• Compute
  • Joyent
  • Azure
  • Rackspace
  • Amazon
• Storage
  • Azure
  • Rackspace
  • Amazon
• Database
  • IrisCouch
  • MongoLab
  • Rackspace
  • MongoHQ
  • RedisToGo

Compute

The pkgcloud.compute service is designed to make it easy to provision and work with VMs. To get started with a pkgcloud.compute client just create one:

  var client = require('pkgcloud').compute.createClient({
    //
    // The name of the provider (e.g. "joyent")
    //
    provider: 'provider-name',
  
    //
    // ... Provider specific credentials
    //
  });

Each compute provider takes different credentials to authenticate; these details about each specific provider can be found below:

• Joyent
• Azure
• Rackspace
• Amazon

Each instance of pkgcloud.compute.Client returned from pkgcloud.compute.createClient has a set of uniform APIs:

Server

• client.getServers(function (err, servers) { })
• client.createServer(options, function (err, server) { })
• client.destroyServer(serverId, function (err, server) { })
• client.getServer(serverId, function (err, server) { })
• client.rebootServer(server, function (err, server) { })

Image

• client.getImages(function (err, images) { })
• client.getImage(imageId, function (err, image) { })
• client.destroyImage(image, function (err, ok) { })
• client.createImage(options, function (err, image) { })

Flavor

• client.getFlavors(function (err, flavors) { })
• client.getFlavor(flavorId, function (err, flavor) { })

Storage

The pkgcloud.storage service is designed to make it easy to upload and download files to various infrastructure providers. Special attention has been paid so that methods are streams and pipe-capable.

To get started with a pkgcloud.storage client just create one:

  var client = require('pkgcloud').storage.createClient({
    //
    // The name of the provider (e.g. "joyent")
    //
    provider: 'provider-name',
  
    //
    // ... Provider specific credentials
    //
  });

Each compute provider takes different credentials to authenticate; these details about each specific provider can be found below:

• Azure
• Rackspace
• Amazon

Each instance of pkgcloud.storage.Client returned from pkgcloud.storage.createClient has a set of uniform APIs:

Container

• client.getContainers(function (err, containers) { })
• client.createContainer(options, function (err, container) { })
• client.destroyContainer(containerName, function (err) { })
• client.getContainer(containerName, function (err, container) { })

File

• client.upload(options, function (err) { })
• client.download(options, function (err) { })
• client.getFiles(container, function (err, files) { })
• client.getFile(container, file, function (err, server) { })
• client.removeFile(container, file, function (err) { })

Both the .upload(options) and .download(options) have had careful attention paid to make sure they are pipe and stream capable:

Upload a File

  var pkgcloud = require('pkgcloud'),
      fs = require('fs');
  
  var client = pkgcloud.storage.createClient({ /* ... */ });
  
  fs.createReadStream('a-file.txt').pipe(client.upload({
    container: 'a-container',
    remote: 'remote-file-name.txt'
  }));

Download a File

  var pkgcloud = require('pkgcloud'),
      fs = require('fs');
  
  var client = pkgcloud.storage.createClient({ /* ... */ });
  
  client.download({
    container: 'a-container',
    remote: 'remote-file-name.txt'
  }).pipe(fs.createWriteStream('a-file.txt'));

Databases

The pkgcloud.database service is designed to consistently work with a variety of Database-as-a-Service (DBaaS) providers.

To get started with a pkgcloud.storage client just create one:

  var client = require('pkgcloud').database.createClient({
    //
    // The name of the provider (e.g. "joyent")
    //
    provider: 'provider-name',
  
    //
    // ... Provider specific credentials
    //
  });

Each database provider takes different credentials to authenticate; these details about each specific provider can be found below:

• CouchDB
  • IrisCouch
• MongoDB
  • MongoLab
  • MongoHQ
• Redis
  • IrisCouch
  • RedisToGo
• MySQL
  • Rackspace
• Azure Tables
  • Azure

Due to the various differences in how these DBaaS providers provision databases only a small surface area of the API for instances of pkgcloud.database.Client returned from pkgcloud.database.createClient is consistent across all providers:

• client.create(options, callback)

All of the individual methods are documented for each DBaaS provider listed above.

Installation

  $ npm install pkgcloud

Tests

For run the tests you will need mocha@1.9.x or higher, please install it and then run:

 $ npm test

The tests use the hock library for mock up the response of providers, so the tests run without do any connection to the providers, there is a notorius advantage of speed on that, also you can run the tests without Internet connection and also can highlight a change of API just disabling hock.

Running tests without mocks

By default the npm test command run the tests enabling hock. And sometimes you will want to test against the live provider, so you need to do this steps, in order to test without mocks.

1. Copy a provider config file from test/configs/mock to test/configs
2. Fill in with your own credentials for the provider.
3. (Optional) The compute test suite run the common tests for all providers listed on test/configs/providers.json, there you can enable or disable providers.
4. Run the tests using mocha.

Mocha installed globally
 $ mocha -R spec test/*/*/*-test.js test/*/*/*/*-test.js

Linux/Mac - Mocha installed locally
 $ ./node_modules/.bin/mocha -R spec test/*/*/*-test.js test/*/*/*/*-test.js

Windows - Mocha installed locally:
 $ node_modules\.bin\mocha.cmd -R spec test/*/*/*-test.js test/*/*/*/*-test.js

Other ways to run the tests

Also you can run the tests directly using mocha with hock enabled:

Linux/Mac - Mocha installed globally:
 $ MOCK=on mocha -R spec test/*/*/*-test.js test/*/*/*/*-test.js
 
Linux/Mac - Mocha installed locally:
 $ MOCK=on node_modules/.bin/mocha -R spec test/*/*/*-test.js test/*/*/*/*-test.js

Windows - Mocha installed globally:
 $ set MOCK=on&mocha -R spec test/*/*/*-test.js test/*/*/*/*-test.js
 
Windows - Mocha installed locally:
 $ set MOCK=on&node_modules\.bin\mocha.cmd -R spec test/*/*/*-test.js test/*/*/*/*-test.js

Even better, you can run the tests for some specific provider:

Linux/Mac - Mocha installed globally:
 $ MOCK=on mocha -R spec test/iriscouch/*/*-test.js

Linux/Mac - Mocha installed locally:
 $ MOCK=on ./node_modules/.bin/mocha -R spec test/iriscouch/*/*-test.js

Windows - Mocha installed globally:
 $ set MOCK=on&mocha -R spec test/iriscouch/*/*-test.js
 
Windows - Mocha installed locally:
 $ set MOCK=on&node_modules\.bin\mocha.cmd -R spec test/iriscouch/*/*-test.js

Code Coverage

You will need jscoverage installed in order to run code coverage. There seems to be many forks of the jscoverage project, but the recommended one is node-jscoverage, because we use node-coveralls to report coverage to http://coveralls.io. node-coveralls requires output from mocha-lcov-reporter, whose documentation mentions node-jscoverage.

Warning

Running coverage will mess with your lib folder. It will make a backup lib-bak before running and restore it if the coverage task runs successfully.

In order to simplify cleanup if something goes wrong, it is recommended to have all all new files added and all changes committed before running coverage, so you'll be able to restore with these commands if something goes wrong:

git clean -fd
git checkout lib

Coverage Pre-requisites

Please make sure jscoverage has been installed following the instructions at node-jscoverage.

Local Coverage

make test-cov

Run Coverage locally and send to coveralls.io

Travis takes care of coveralls, so this shouldn't be necessary unless you're troubleshooting a problem with Travis/Coveralls. You'll need to have access to the coveralls repo_token, which should only be visible to nodejitsu/pkgcloud admins.

1. Create a .coveralls.yml containing the repo_token from https://coveralls.io/r/nodejitsu/pkgcloud
2. Run make test-coveralls

Contribute!

We welcome contribution to pkgcloud by any and all individuals or organizations. Before contributing please take a look at the Contribution Guidelines in CONTRIBUTING.md.

We are pretty flexible about these guidelines, but the closer you follow them the more likely we are to merge your pull-request.

Roadmap

1. Backport latest fixes from node-cloudfiles and node-cloudservers
2. Include CDN and DNS services.
3. Implement fs compatible file API.
4. Support additional service providers.

Author: Nodejitsu Inc.

Contributors: Charlie Robbins, Nuno Job, Daniel Aristizabal, Marak Squires, Dale Stammen, Ken Perkins

License: MIT