Security Automation with Ansible 2

BlueGreen deployments

The concept of BlueGreen is attributed to Martin Fowler. A good reference is this article http://martinfowler.com/bliki/BlueGreenDeployment.html on it. The idea is to consider our current live production workload as blue. Now what we want to do is upgrade the application. So a replica of blue is brought up behind the same load balancer. The replica of the infrastructure has the updated application.

Once it is up and running, the load balancer configuration is switched from current blue to point to green. Blue keeps running in case there are any operational issues. Once we are happy with the progress, we can tear down the older host. The following playbook demonstrate this in a very simplistic manner: 

• The first playbook ...