Provisioning of Jenkins for rails continuous integration

This project provides provisioning files for setting up a jenkins server for doing ruby on rails continuous integration and deployment, with Vagrant support. Still under active development.

Usage

Usage - Provisioning a regular server:

git clone [email protected]:robotadmin/jenkins_rails_ci.git
cd jenkins_rails_ci
source bootstrap.sh

Attention -- when provisioning Amazon AWS:

If you run the machine as is in the free tier, you can get an error "java.io.IOException: error=12, Cannot allocate memory". This is due jenkins not being able to allocate memory as a result of the JVM forking process (see this stackoverflow question for an excellent explanation). There are two main steps that you should follow in order to prevent this from happening:

• First, configure a swap file (or swap partition). I added a helper script for that which is here.

• Second, edit /etc/default/jenkins, and add the following line to adjust the size of the JVM heap size:

  JAVA_ARGS="-Xmx128m -Xms128m"

You can experiment with the arguments a bit (see more info here) -- 128m was really the maximum size of the JVM that I could allow in the Amazon AWS free tier.

Usage - Provisioning a vagrant environment:

• copy the contents of the repo into your vagrant shared directory (which will be "shared" in /vagrant inside the virtual machine)
• add the following line to your Vagrantfile: config.vm.provision :shell, :path => "bootstrap.sh"
• boot the VM normally with "vagrant init".

For more information about provisioning Vagrant, check out this link

I used bootstrap.sh normally to provision a Amazon AWS machine. However, this project looks promising, it allows you to control and provision an AWS machine based on Vagrant.

Configurations

What bootstrap.sh does

What boostrap.sh doesn't do (aka "future work")

How to configure Jenkins

Helper scripts

• There are helper scripts for

Nice references on using jenkins for continuous integration and deploy for rails applications

• http://rails-jenkins.danmcclain.net/

• http://jenkins-ci.361315.n4.nabble.com/Installing-Jenkins-plugins-via-API-td4639021.html

• http://serverfault.com/questions/321167/add-correct-host-key-in-known-hosts-multiple-ssh-host-keys-per-hostnam

• https://wiki.jenkins-ci.org/display/JENKINS/Configuring+a+Rails+build

• http://stackoverflow.com/questions/5212304/authenticate-jenkins-ci-for-github-private-repository

• http://stackoverflow.com/questions/7116635/capybara-webkit-rspec-integration-specs-and-xvfb-webkit-server-fatal-io-erro

Thanks

• Thanks @jmmendes for help debugging and configuring.