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CoreOS available on Azure

This morning at the Microsoft Azure press event, Microsoft announced that CoreOS is now available as an image in the Azure Virtual Machines Gallery.

Every language has a problem with dependencies. In C there are problems with bumping minor shared library versions and having unexpected bugs appear in applications. Ruby and Python have problems with applications having conflicting dependencies requiring the use of bundle or virtualenv to create private library stores.

This is a guest post by Roman Shtylman

This post will cover basic techniques for managing CoreOS machines using Ansible. Familiarity with Ansible and basic understanding of CoreOS are helpful in following along with this post.

What is Ansible?

From the Ansible Documetation

Over the last few hours we began rolling out shellshock fixes to all CoreOS deploys that have automatic updates enabled (this is default). If you have disabled automatic upgrades through cloud-config reboot-strategy, a manual reboot should give you the latest version.

You can test if your CoreOS has been patched by testing the exploit, or by checking the version of CoreOS you are running in /etc/os-release. Patched versions are listed below:

As many of you have heard, there are open Bash vulnerabilities, CVE-2014-6271, and CVE-2014-7169. The common vectors for arbitrary code execution from these CVEs include: bash exposed via certain web applications and dhcpcd scripts. Additionally, SSH accounts restricted by the command= option in their ssh key can bypass that restriction.

Yesterday we were excited to see that Interactive Markdown, who used CoreOS on DigitalOcean, won runner up at the TechCrunch Disrupt hackathon. CoreOS was made available on DigitalOcean on Friday and come Saturday the Interactive Markdown team was building their application on top of CoreOS.

2,000 of you voted for CoreOS on DigitalOcean and we're happy to report that it's arrived. Starting today, you can head to DigitalOcean, choose the CoreOS image, and start experimenting with containers and all CoreOS has to offer.

Edit: This post has been updated to reflect the project name change from rudder to flannel

This is a guest post by Lucas Carlson, Head of CenturyLink Labs

Here at CenturyLink Labs, we help people learn how to adopt new technologies like Docker and CoreOS into their daily lives. This has given us a unique perspective on the Docker ecosystem because we are trying to stay on top of one of the fastest growing open-source projects in history.

After talking to tens of thousands of developers and ops people, we kept hearing the same thing over and over:

Update: We've updated a few aspects of our training program and the CoreOS Specialist certification is not offered at this time.

Today we are excited to bring you more opportunities to learn about CoreOS - both through the Linux Foundation’s Certification Program that was announced today and through in-person training courses.

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