Vagrant / Ansible

This is an example of using vagrant with anisble to create 2 web servers and an nginx proxy to round robin between the 2 servers.

Software requirements

• vagrant > 1.8.1
• ansible > 2.0.2.0
• go compiler

How to run

make

What happens

• Compiles the go program for i386 linux
• Starts 2 web servers using ansible playlist
• These servers copy the go binary and start it using systemd
• Starts up a proxy server
• Installs nginx from EPEL
• Configures config based on information about the previous webservers
• Does a quick test to see if it works

Imporvements

• The configuration is very dependant on the number of webservers partly due to the way vagrant and ansible play with each other it maybe possible to do this a better way.
• The checks are very basic
• Security has not being a concerns so currently the app runs as root

notes

If you decide to try vagrant and ansible some quick notes of things that will help

• As Vagrant has a different private key per server it is importnat to keep a fact cache. see [ansible.cfg]
• Setting hostname in a Vagrant loop does not see possible (Bug?)