S

Ansible & Vagrant ecosystem

Oriol Fbregas Bull

Who am I?

S DevOps Enthusiast

S Using Ansible for over a year

S Love automation

S Love challenges

S 3 years in Telefnica R+D

Why Vagrant?

S Great development environment

S Portable to many platforms

S Widely customizable

S Ansible provisioning

S Many providers

S Excellent for trainings!

And why Ansible?

S Simple YAML playbooks

S Good conditional statements

S Ansible Facts

S Run tasks on hosts

S Speed

About this training

S Basic 3 nodes S MySQL S Nginx S Wordpress on Apache

S Advanced 10 nodes S MySQL cluster S Nginx S Apache cluster S GlusterFS cluster

S Source Code

Vagrant setup

$ git clone https://github.com/wefner/ansible-vagrant.git $ cd ansible-vagrant/ $ vagrant plugin install vagrant-host-shell $ vagrant box add chef/centos-6.5 --provider virtualbox $ cd basic/ $ vagrant status Current machine states: web not created (virtualbox) db not created (virtualbox) proxy not created (virtualbox) $ vagrant up --provision

Vagrantfile

S Hosts and hardware specs

S OS to load from

S Port forwarding

S Ansible provision

Know more

Ansible components

S Ansible

S Ansible-playbook

S Ansible-vault

S Ansible galaxy

S Ansible Tower

Getting started

S Install ansible

S Get familiar with: S YAML S JINJA2

S Check if Tower fits your needs

S Vagrant interface

$ pip install ansible $ brew install sshpass

What is YAML?

S Everything in Ansible are files

S Most of them are YAML files

S YAML is simple to define structured data

array_example: - value1 - value2 - value3

literal: value

hash_example: key1: value1 key2: value2 key3: value3

Ansible.cfg

S Configuration settings

S Default behavior

S Global

Know more

Ansible adhoc

$ ansible 'db' -i enviro/vagrant/hosts -m ping -u vagrant

Know more

Ansible Facts

S Returns facts from hosts

S Set them as variables for Ansible

Know more

$ ansible 'db' -i enviro/vagrant/hosts -m setup -u vagrant

ansible-playbook

$ ansible-playbook i enviro/vagrant/hosts e pub_file=~/id_rsa.pub e user=vagrant

Know more

Inventory

S Where your hosts are defined

S Within groups

S Host/group variables

S Group of groups

$ cat /etc/ansible/hosts

Know more

Dynamic inventory

S Script that outputs JSON file

S JSON file that Ansible will read

S Integration with: S EC2 S LDAP S CMDB S Cobbler

Modules

S Libraries for playbooks

S Everybody can submit PR

S Can control system resources

S Essential

S Takes arguments as key=value

Roles

S Set a number of tasks as roles

S Define what servers should have running

S Default variables capability

S Conditionals

S Jinja2 templates

Know more

Handlers

S Shortcuts called by tasks when changed

Templates

S Jinja2 language

S Develop your own plugins!

S Keep logic according to task/hosts variables

S The less logic inside templates the better

Know more

Tasks

S List of things you want to do. Period.

S Use of conditionals

S Use of variables

S Call handlers

S Tags

Know more

Run playbooks

S Main playbook definitions

S You can S Set roles S Set hosts S Set variables S Set conditions

$ ansible-playbook -i enviro/vagrant/hosts lamp.yml -limit proxy

Vault

S Secure playbooks

S Useful for variables as S Certificates S Passwords S Private keys

S Master password S From file S On demand

Know more

$ vim playbook.yml $ ansible-vault encrypt playbook.yml Vault password: Confirm Vault password: Encryption successful $ echo password > secret.txt $ ansible-playbook playbook-yml \ --vault-password-file=secret.txt

Plugins

S Connection Type Plugins

S Lookup Plugins

S Vars Plugins

S Filter plugins

S Callbacks

Know more

Tower

S Licenced feature

S GUI framework

S User/group grants

S Playbook history

S Scheduled jobs

Q/A

source: inc.com