automating with ansible
TRANSCRIPT
Enjoy tonight!
+ +
Who Am I?
- - -
- define devops user
- user: name=Ricardo Schmidt
accent=Brazilian
What we will use in this presentation
- Linux
- YAML
My examples use:
- Vagrant
- EC2/AWS
What’s Ansible?
• Open source tool, created +- 3 years ago by Michael DeHaan.
• Configuration Management + Application Deployment +
Provisioning + Orchestration.
• Written in Python.
• Competes with Puppet, Chef, Salt Stack.
Ansible is…
• Fast
• Clear
• Complete
• Secure
Fast
• Minimal Setup
• Manage 5 or 5000 nodes
• Short learning curve - It is easy to learn
Clear
• Developers
• System Administrators
• IT Management
Complete
configuration
management
deployment
orchestration provisioning
Secure
• Go Agentless!
• SSH transport
• No additional firewall rules
• No additional open ports
• Use your own user
• You can sudo
Dynamic Provisioning
• Ansible can manage your cloud.
Key Components of Ansible
• Inventory
• Modules/Tasks
• Ad-Hocs
• Plays
• Playbooks
Inventory
• Hosts and Groups
• Port and address
• Remote/sudo usernames
Inventory: Hosts
web1.example.com ansible_ssh_port=5555 ansible_ssh_host=192.168.1.50
Inventory Name SSH port Connection address
Inventory: Groups
[webservers]
web1.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.50
web2.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.51
web3.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.52
[database]
mysql1.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.54
mysql2.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.55
Modules
• Bits of code copied to the target system.
• Modules avoid changes to the system unless a change
needs to be made.
• You can write your own modules.
Modules: Commonly Used
• apt/yum
• copy
• ec2
• file
• service
• git
• user
200+ Ansible
Modules
Tasks
Task is a declaration about the state of a system.
- name: install memcached
yum: name=memcached state=present
- name: Create database user with all database privileges
mysql_user: name=bob password=12345 priv=*.*:ALL
state=present
• Ad-Hoc
• Playbook
Ad-Hoc commands
$ ansible web-hosts -m file -a "path=/opt/cache state=directory"
$ ansible web-hosts -m yum -a "name=nginx state=present"
$ ansible web-hosts -m service -a "name=nginx enabled=yes state=started"
Playbook / Play
---
- name: This is Play 1
hosts: web-servers
remote_user: fred
sudo: yes
tasks:
- name: create user
user: name=ricardo
- name: install nginx
yum: name=nginx state=present
- name: This is Play 2
hosts: memcache-1
remote_user: root
tasks:
- name: install memcached
yum: name=memcached state=present
- name: start memcached
service: name=memcached state=started
- name: copy file ABC to somewhere
files: name=/etc/abc state=/etc/abc
Demo Time
• inventory
• ad-hoc commands
• playbook
Support to Windows
Starting in version 1.7, Ansible also contains support
for managing Windows machines. This uses native
powershell remoting, rather than SSH.
Ansible Galaxy
• Collection of 500 roles
• Community reviewed
• Great starting point
http://galaxy.ansible.com
What we didn’t talk…
• Variables
• Templates
• Roles
• Ansible-vault
• Ansible Tower
How should I start with Ansible?
ansible.com
docs.ansible.com
twitter: @ansible
Q&A
Thanks!
Looking for a new Job?
strut.ly is hiring! Talk to me!
Ricardo Schmidt - [email protected]