Deis is an open source PaaS that makes it easy to deploy, scale and manage containers used to host applications and services. Deis builds upon Docker and CoreOS to provide a private PaaS that is lightweight and flexible.

Deis has undergone several improvements recently. If you are updating from Deis version 0.7.0 or earlier, there are several big changes you should know about. Read the MIGRATING.md document for details.

If you need to use Deis with Chef integration, on Ubuntu 12.04 LTS, or on DigitalOcean, you should use the v0.7.0 release of Deis.

Deis is a set of Docker containers that can be deployed anywhere including public cloud, private cloud, bare metal or your workstation. You will need Docker and Vagrant to get started.

First, start a CoreOS virtual machine on VirtualBox. From a command prompt, cd to the root of the Deis project code and type:

vagrant up

Export some environment variables so you can connect to the VM using the docker and fleetctl clients on your workstation.

export DOCKER_HOST=tcp://172.17.8.100:4243
export FLEETCTL_TUNNEL=172.17.8.100

Use make pull to download cached layers from the public Docker Index. Then use make build to assemble all of the Deis components from Dockerfiles. Grab some coffee while it builds the images on the CoreOS VM (it can take a while).

make pull
make build

Use make run to start all Deis containers and attach to their log output.

make run

Either use pip install deis to install the latest Deis Client, download pre-compiled binaries, or symlink client/deis.py to use your local development version.

ln -fs $(pwd)/client/deis.py /usr/local/bin/deis

Use the Deis Client to register a new user.

deis register http://local.deisapp.com:8000
deis keys:add

Use deis keys:add to add your SSH public key for git push access.

Initalize a dev cluster with a list of CoreOS hosts and your CoreOS private key.

deis clusters:create dev local.deisapp.com --hosts=local.deisapp.com --auth=~/.vagrant.d/insecure_private_key

The dev cluster will be used as the default cluster for future deis commands.

Create an application on the default dev cluster.

deis create

Use deis create --cluster=prod to place the app on a different cluster. Don't like our name-generator? Use deis create myappname.

Push builds of your application from your local git repository or from a Docker Registry. Each build creates a new release, which can be rolled back.

When you created the application, a git remote for Deis was added automatically.

git push deis master

This will use the Deis builder to package your application as a Docker Image and deploy it on your application's cluster.

Configure your application with environment variables. Each config change also creates a new release.

deis config:set DATABASE_URL=postgres://

Coming soon: Use the integrated ETCD namespace for service discovery between applications on the same cluster.

Test your application by running commands inside an ephemeral Docker container.

deis run make test

To integrate with your CI system, check the return code.

Scale containers horizontally with ease.

deis scale web=8

Access to aggregated logs makes it easy to troubleshoot problems with your application.

deis logs

Use deis run to execute one-off commands and explore the deployed container. Coming soon: deis attach to jump into a live container.

We have sometimes seen the VM reboot while doing make build against a Vagrant virtual machine. If you see this issue using a recent version of Vagrant and the current master version of Deis, please add to the issue report at https://github.com/coreos/coreos-vagrant/issues/68 to help us pin it down.

Copyright 2014, OpDemand LLC

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

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.