Ansible and CloudStack

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This document discusses using Ansible to automate CloudStack deployments and operations. It provides an overview of Ansible and how it can be used with CloudStack through modules to deploy and manage virtual machines, load balancers, and other infrastructure on CloudStack. Examples are given of using Ansible playbooks to deploy a simple web application on CloudStack and make it highly available through load balancing and automated maintenance.

Technology

Who am I
● René Moser aka resmo
● Linux System Engineer @ SWISS TXT
● Likes open, simple, distributed, plain
text things

SWISS TXT
● Member of Swiss National Broadcast
Association Groups
● IT and Multimedia Solution Provider
● Software Development

What We Do
● Swiss CDN
● On Demand and Live Streaming
● Private Swiss Media Cloud
● Ansible DevOps Consulting
● Peta Byte Nearline Storage

DevOps
● Scalable
● Reliable
● Reproducible

Why Ansible?
● Simple and clean
● Made for production
● Power in your hands!

What use Ansible for?
● Server Deployments
● Configuration Management
● IT Orchestration and Automation

Ansible @ SWISS TXT?
● Updating CloudStack VRs
● Automating DNS and Monitoring
● Configuration of CDN
● Upgrading CloudStack
● Provision VMs on CloudStack

Ansible @ SWISS TXT?
● ~ 3'000 commits
● 7.5 commits per weekday
● Inventory: ~500 nodes (~4094 lines)
● 564 (yaml, j2) files have 21896 lines

What is Ansible?
● Command Line tool in Python
● Uses SSH for connection
● No Agents
● Push based, pull possible
● Possible Distributed workflow

Welcome to Ansible
● License: GPLv3
● Source: github.com/ansible
● Started: ~ 2012
● >1200 contributors
● Latest: v1.9.4
● Rewritten core v2.0

Security?
● Auth: SSH public keys, LDAP, password
● Does not need root
● Can do sudo

Inventory
● Contains your node definition
● ini-style plain text file
● Dynamic from LDAP, DB, cloud as JSON

Modules
● Batteries included
● Used for executing tasks
● Core: apt, yum, copy, template, cron,
user, service …
● Extras: Zabbix, OpenStack,
CloudStack ...
● Currently ~500

Run modules?
● ad-hoc mode: one task at a time
ansible -m yum -a 'pkg=httpd
state=latest' webservers

Run modules?
● Multiple modules as tasks in
playbooks
ansible-playbook webservers.yml

Playbooks?
● Written in YAML
● Playbook contains plays
● Play targets hosts
● Play contains tasks

CloudStack Modules
● 21 Modules
● Included in v2.0
● Integration tested

Why CloudStack Modules?
● Handles idempotence
● Regions support
● Reuse API response in your play

CloudStack Demo 1
● zero to hero
● web application to a public cloud in
minutes

CloudStack Demo 2
● Load balanced web application
● Make some maintenance one members

Links
● Guide: http://docs.ansible.com/ansible/guide_cloudstack.html
● Docs: http://docs.ansible.com
● Example: https://github.com/resmo/ansible-cloudstack-example

Thank you!
● Apache: resmo@apache.org
● Twitter @resmo79
● GitHub: github.com/resmo
● IRC: resmo
● Blog: resmo.ch
● GPG: 0x8306965BE6D6331D

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This document discusses implementing DevOps with Python using Ansible. It provides an agenda for the presentation including discussing DevOps hotspots, infrastructure as code with Ansible, continuous integration/continuous delivery (CI/CD) using TravisCI and CircleCI, and an open discussion on monitoring and automated tests. It then covers problems commonly faced, how DevOps solves these problems, and the expected benefits of adopting a DevOps culture including standardized environments, infrastructure as code, automated delivery, monitoring, and improved collaboration. It provides an overview of Ansible concepts like inventories, ad-hoc commands, modules, playbooks, roles, and templates. It also demonstrates writing a custom Python module for Ansible and using it in a playbook. Finally, it

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