Efficient Rails DevOps

Example app following the Efficient Rails DevOps book by Michael Trojanek.

Get up and running

• Clone the repo and change into the directory
• Run vagrant up to start the VM
• Start the playbook with ansible-playbook -i inventories/staging site.yml --ask-vault-pass
  • to run an individual tags, use ansible-playbook -i inventories/staging --tags TAG_NAMES_HERE site.yml --ask-vault-pass
• Update the yum packages using:
  • ssh [email protected] "yum -y update" for a single machine
  • ansible rails -u root -i inventories/staging -a "yum -y update" --ask-vault-pass for all machines belonging to the rails group of our inventories/staging file as the root user

IMPORTANT

This repo uses ansible-vault to encrypt its configuration and other sensitive information, but seeing as the password used to encrypt it is made public (listed below, and in the book), it is not advised you use it as is, and instead re-encrypt the relevant files yourself.

Ansible Vault

• Password erdo

• To create a new vault, run ansible-vault encrypt path/to/file

• To edit a vault file, run ansible-vault edit path/to/file

Encrypted files

• group_vars/all

Generate crypted password (for root_password task)

python -c 'import crypt; print crypt.crypt("PASSWORD_HERE", crypt.mksalt(crypt.METHOD_SHA512))'

IP address

This repo is based on the IP subgroup of 192.168.1.*. If your subgroup is different and you need to modify the IP address, you'll need to update both the Vagrantfile and inventories/staging files.

Installing Ansible

pip install --upgrade pip
pip install ansible

No Python?

If the commands above don't work, you probably don't have Python 2 installed. The book recommends you use pyenv to install python, as it'll give you the ability to switch between different version, much like the benefits obtained by using rbenv.

For a a quick and dirty install process on OS X:

brew update
brew install pyenv

At this point it's important to note the set-up instructions provided by the installer.

pyend install 2.7.10
pyenv global 2.7.10