ansible-elb-deploy

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ansible-elb-deploy

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Ansible playbook to roll a deploy on hosts behind AWS ELBs

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Ansible ELB deployment
======================

Ansible playbook to roll a deploy of a java application running on tomcat,
on hosts behind AWS ELBs.

Introduction
------------

This ansible playbook rolls updates to a set of application servers
behind an Amazon load balancer (ELB).

The steps are:

* Disable alerts on the monitoring system
 * Remove the node from the Elastic Load Balancer
 * Disable service supervisor (monit)
 * Roll the update
 * Reverse previous steps to re-enable services

Application deployment
----------------------

The application deployment is done through a tomcat role, which takes
the following steps:

* Undeploy through Tomcat's scripted manager
 * Stop tomcat
 * Ensure the application cache is removed
 * Download the war file from an HTTP repository
 * Startup tomcat

TODO List
=========

* Before downloading the file double check md5 to verify if
   a deployment is necessary
 * Implement some sort of wait / app check, as when tomcat
   startups it ussually takes some time before the application
   is up and running
 * User and password to get the application war should be optional

ansible-elb-deploy

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