Deis 0.8.0 - CoreOS Integration

6 May 2014

The Deis project is proud to announce our v0.8.0 release. Deis now runs on CoreOS and no longer requires Chef. Apps deploy to clusters of machines using a simpler, faster and more reliable job scheduling interface.

If you are updating from Deis version 0.7.0 or earlier, read the document for details.

What is Deis?

Deis is an open source PaaS that makes it easy to deploy and manage applications on your own servers. Deis builds upon Docker and CoreOS to provide a lightweight PaaS with a Heroku-inspired workflow.

0.8.0 Summary

New Features

  • Cluster-wide scheduling Deis itself and apps it deploys use the fleet distributed init system for flexible scheduling across available machines.

  • Basic integration test Test your local changes, or verify your new Deis installation with the basic integration tests we've begun in the test/ directory.

  • Doc updates We added new content appropriate to our CoreOS changes to Deis' documentation, and put files in each top-level directory to help you get oriented.

  • deis create --no-remote allows creating a Deis app without adding a git remote.

  • New deis/logger New, lightweight syslogd server written in Go to handle aggregation of application logs.

  • deis/helloworld is a new Dockerfile-based example app to help you get started.

  • #deis at Joining the #deis conversation on IRC is even easier thanks to the excellent service from

  • easy-fix tag Help the Deis revolution by picking an easy-fix issue to start contributing.

Under the Hood

  • Moved project to
  • Updated to Docker 0.10.0 (deis/builder)
  • Updated to Django 1.6.4 (deis/controller)
  • Updated to CoreOS 298.0.0
  • Implemented finite state machine for containers
  • Improved scheduling unit tests and error handling
  • deis ps is preferred to deis containers
  • Removed unused cloud provider libraries from pip install

Bug Fixes

  • deis rollback works again
  • fixed 404 on deis logs
  • fixed code coverage report and badge
  • isolated PostgreSQL test suite errors on to one (skipped) method
  • filled a gap in available ephemeral port range for apps

Community Shout-Outs

We want to thank the following Deis community members for creating GitHub issues, providing support to others, and working on various Deis branches:

  • @dginther - user-data fix to stop update-manager service
  • @goloroden - Vagrant NFS / root access issue
  • @gshiva - EC2 testing, bug reports
  • @hyao - testing, nfs-kernel-server doc note
  • @johanneswuerbach - testing, registry bug, S3, cache, other reg options PRs
  • @jschneiderhan - missing Docker repositories issue
  • @jwaldrip - nginx welcome page issue, MySQL question, bug finding
  • @lukaso - found fleetctl command doc issue
  • @philiptzou - Vagrant static files in Django issue
  • @recipher - EC2 testing
  • @zyegfryed - remove duplicate etcdctl install statement

And a big hello to kristjanpk, nathansamson, StDiluted, stefanfoulis, and all the others who keep our IRC channel so lively!

Known Issues

Container Timeouts

We are still seeing stability issues with the public Docker Index and its content delivery network. When bootstrapping a Deis cluster, this can manifest as timeout errors, missing images and/or missing layers. Manual systemctl commands will usually resolve the issue. We are working with the Docker team on the root issue.

Proxy for Platform Services

As part of moving Deis into Docker containers, we had to change the exposed ports for some core platform services. For example, the Django API server is now exposed on 8000/tcp rather than 80/tcp. We will soon update the Deis router to expose platform services on standard ports.

What's Next?

Deis Upgrades

In our push toward 1.0, our most important priority is making sure Deis upgrades are fast, painless and backwards compatible. We are devoting significant resources to this effort, and are working closely with the CoreOS team who has a great deal of experience with rolling upgrades.

Better Heroku Compatibility

We want to ensure Deis follows Heroku semantics as closely as possible. To achieve this, we may need to make changes to the Deis client, REST API as well as new Heroku-provided features deemed necessary for Deis. We plan to have the bulk of this compatibility implemented in the next release.

Improved Docker Integration

We have heard from the community and our customers that Deis needs a way to deploy and promote existing Docker images outside of a git push style build process. This is critical for implementing CI/CD pipelines on top of Deis. We are currently investigating the best workflow in conjunction with our friends at Docker HQ. We hope this new feature, combined with enhanced support for pushing Dockerfile repositories, will provide the best Docker-native experience of any PaaS on the market.

Platform Security & HA

With Deis being used for more and more real-world deployments, we need to address remaining security issues as well as high-availability of the platform itself. This work has already begun in earnest, and will be a prerequisite for our 1.0 release.


Service Gateway

We need to make it as easy as possible for ops folks to publish a set of reusable backing services (databases, queues, storage, etc) and allow developers to attach those services to applications. This will be done in a loosely coupled way, following Twelve Factor best practices. You can review the initial implementation and follow progress on this GitHub issue.

Interactive deis run

Though we provide the ability to run admin commands inside containers, we don't currently support interactive shells into containers (i.e. deis run bash). Once this infrastructure is in place, this will also allow us to implement log tailing and other real-time features.

How can you help?

  • Star our GitHub repository
  • Help spread the word about @opendeis on Twitter
  • Explore contributing to the Deis project by joining the #deis channel on Freenode

You can learn about other ways to get involved on our website.

Posted in Deis v1 PaaS

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