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Showing posts from August, 2015

Dynamically add Jenkins slaves using Kubernetes

CI is a very interesting area where Kubernetes can be applied. It's a common use case to have a demand of containers to be able to run tests of code changes, or to create some build artifacts.
In this post I will be explaining how to use Kubernetes to spin up Jenkins slaves and connect them to a Jenkins master, allowing to run tests on demand, and have a very easy and fast way to scale depending on our needs.

Pre-requisites needed on Jenkins master Installing Jenkins plugin This approach relies on Jenkins Swarm Plugin. So you need to ensure that you have installed this module on your master:

For Jenkins Swarm Plugin to work, you need to enable CSRF. You need to visit and check the Prevent Cross Site Request Forgery exploits option.

Configure security Also consider that Jenkins uses a random port to enable connection to slaves using JNLP. If you are under a protected environment, you m…

Integration of Kubernetes + OpenStack using Ansible

Kubernetes 1.0 has been lately released - it was announced at OSCON on July 21st.
As an OpenStack user, and regular OpenStack infra contributor, I can see a high value on Kubernetes + OpenStack integration.

For that reason, I started a project, based on , to automate a Kubernetes cluster using OpenStack (used HP Cloud as a sample).

In this post, I will be describing the steps needed to deploy a whole Kubernetes cluster in few steps. All source files used are stored on

Before starting So, what do you need to start? You will need a cloud (HP Cloud, Rackspace...) and a service account with enough permissions to manage instances.

You will need ansible ... ideally, you should download ansible branch on and use develop branch to work. If you execute:

$ source ./hacking/env-setup You will be able to run ansible from that branch.

We will be using Op…