Infrastructure As Code - NextGen Testing 2015
1 like663 views
This document discusses infrastructure as code and provides an overview of key concepts. It begins with a survey of attendees' experience with infrastructure management. Infrastructure as code treats infrastructure configuration like code by using source control and development practices like testing. It enables repeatability, speed, accuracy and agility. Key benefits are highlighted for Ansible and ServerSpec, open source tools for infrastructure automation and testing. A case study of Wealthfront shows benefits of infrastructure as code. The presentation concludes with a demo of code examples.
Infrastructure As Code - NextGen Testing 2015
- 1. INFRASTRUCTURE AS CODE Andre Sachs andre@cloudafrica.net #NGTCONF
- 2. WHO AM I ? Started work in the ISP space in 1996 Open Source integration specialist 15 Year Development 19Years Ops Large scale deployments > 2000 servers Site Reliability Engineer at CloudAfrica
- 3. OVERVIEW Why Infrastructure As Code ? What is Infrastructure As Code ? Key Concepts Ansible Highlights ServerSpec Highlights Demo
- 4. BUT FIRST A QUICK SURVEY How many of you are developers ? How many of you are sysadmins ? Who still SSH’s/RD’s to servers to make changes ? Anyone script changes to your environment ? Anyone heard of configuration management or is practising it ? Anyone using Ansible or ServerSpec ? 4
- 5. WHY INFRASTRUCTURE AS CODE ? Repeatability Speed Accuracy Testability Agility
- 6. WHAT IS INFRASTRUCTURE AS CODE ? The essence of Infrastructure as Code is to treat the configuration and definition of systems just like writing software Source code management systems are used to understand changes over time Leverage Test Driven Development (TDD) of environments Apply Continuous Integration (CI) Constant refactoring Validation and other XP practices are especially useful for making sure that changes to infrastructure are thoroughly tested, repeatable, and transparent. 6
- 7. CASE STUDY - WEALTHFRONT Wealthfront is an invest management business In early 2011 - Infrastructure redesign and reimplement every two weeks, from the ground up in AWS While managing really world money (about $180M at the time) Now have more than $2.5B under management Time to get code into production +- 10 minutes, including fully automated testing
- 9. KEY CONCEPTS Atoms that make up systems Files Packages Services 9
- 10. KEY CONCEPTS Starting state > Convergence > Desired state Fact discovery Idempotent - can be applied multiple times without changing result Multi-host orchestration Repeatability Speed 10
- 12. ANSIBLE HIGHLIGHTS Open Source (GNU GPL) Agentless (Including Windows using WinRM and PowerShell) ! Easy to write and read (YAML) Configuration management, App deployment, Orchestration, Provisioning Secure - Runs over SSH CLI based Expensive Web Interface to appease Corporate Overlords - ANSIBLE TOWER Open Source Web Interface is starting to gain some ground - SEMAPHORE 12
- 13. SEVERSPEC OVERVIEW Open Source (MIT License) Serverspec tests your servers' actual state by executing command locally, via SSH, via WinRM, via Docker API So you don't need to install any agent softwares on your servers and can use any configuration management tools, Puppet, Ansible, CFEngine, Itamae But the true aim of Serverspec is to help refactoring infrastructure code.
- 14. DEMO! 14 Code Examples available at: https://github.com/CloudAfrica/Talk_Infrastructure_As_Code
- 15. THANKS ! www.ansible.com Code is at : https://github.com/CloudAfrica/Talk_Infrastructure_As_Code/ Books https://leanpub.com/ansible-for-devops O’reilly - Ansible Up and Running serverspec.org 15 #NGTCONF