using devops tools to achieve continuous...

Using DevOps Tools to Achieve Continuous Integration

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Speakers

Kyle Kelley Developer Support Engineer

@rgbkrk

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Ryan Richard, RHCA DevOps Automation Team Lead

@rackninja

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First, a precursor


Why are we here?

• We are all building up similar systems • Similar configurations, minor tweaks • Want:

• More time for applications and business • Less time doing SysOps


Keep Deploying!

• Let’s keep that product going • Let’s keep delivering!


What can we do?

• Write tests • Use Continuous Integration • Use version control, particularly git


Let’s Test!

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Object Placeholder

Downtime

• It’s going to happen • Assume failure • Have a rollback strategy - for your application

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Testing with Open Source Tools

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Minimal .travis.yml

language: python python: – “2.6” – “2.7” – “3.2” – “3.3” # install dependencies install: “pip install .” # run tests script: nosetests

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Need more build power?

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How the DevOps Automation Service tests our cookbooks


Practical examples with Chef

• Our pipeline for testing cookbooks

• Testing your chef powered infrastructure

Our CI pipeline for Chef cookbooks

CI server Jenkins


CI server Jenkins

Workflow Rake


CI server Jenkins

Workflow Rake

Ruby Syntax/lint


CI server Jenkins

Workflow Rake

Ruby Syntax/lint

Chef Syntax/lint Foodcritic


CI server Jenkins

Workflow Rake

Ruby Syntax/lint

Chef Syntax/lint Foodcritic Unit test Chefspec


CI server Jenkins

Workflow Rake

Ruby Syntax/lint


Functional tests Test-kitchen + serverspec


CI server Jenkins

Workflow Rake

Ruby Syntax/lint


Functional tests Test-kitchen + serverspec

Thor

Human/automated

Post Steps

Final


Two modes of application delivery

Webhook Cookbook

Python Mongo Supervisord

•  Build an application cookbook that can deploy latest version of the application/artifact (chef specific)


Two modes of application delivery

Webhook Cookbook

Python Mongo Supervisord

•  Build an application cookbook that can deploy latest version of the application/artifact (chef specific)

•  External workflow for application delivery •  (Capistrano, fabric, etc).

Application Cookbook Workflow

CI server Jenkins

Workflow Rake

Ruby Syntax/lint



CI server Jenkins

Workflow Rake

Ruby Syntax/lint


Functional tests Test-kitchen + serverspec Do not destroy instance


CI server Jenkins

Workflow Rake

Ruby Syntax/lint


Functional tests Test-kitchen + serverspec Do not destroy instance

Jenkins steps or additional jobs: Integration tests, load tests, user tests, etc

Human/automated

Post Steps

Final

Deployment Workflow Model

CI server Jenkins

Chef Workflow Test-kitchen + serverspec Do not destroy instance


CI server Jenkins


Additional Jobs Deployment workflow executed


CI server Jenkins



Integration tests, load tests, user tests, etc. Additional Jobs


CI server Jenkins

Chef Workflow

Final Human/automated

Test-kitchen + serverspec Do not destroy instance


Integration tests, load tests, user tests, etc. Additional Jobs

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