infrastructure as code with aws cloudformation

Infrastructure as code with

AWS CloudFormation

PyMunich 2016

Justyna Janczyszyn (JJ)

@JJanczyszyn

software engineer at 10Clouds

CHALLENGES

4 PyMunich 2016@JJanczyszyn

https://github.com/tramwaj29/infrastructure-as-code



Image taken from: Infrastructure as Code by Kief Morris

Infrastructure as code principles and practices to the rescue!



Any element of infrastructure should be easily reproducible



Infrastructure as Code by Kief Morris

Systems should be consistent




Processes should be repeatable




Design is always changing




Practices



• Use Definition files • Self-documented systems and processes • Version all the things • Continuously test the systems and processes • Small changes rather than batches • Services available continuously


CloudFormation





Image taken from http://fbrnc.net/blog/2016/05/green-blue-deployments-with-aws-lambda-and-cloudformation

http://fbrnc.net/blog/2016/05/green-blue-deployments-with-aws-lambda-and-cloudformation

Creating a stack



aws cloudformation create-stack --stack-name demo-iac

--template-body file://Template.yaml --parameters file://Params.json

--capabilities CAPABILITY_NAMED_IAM --region eu-west-1;



aws cloudformation describe-stacks --stack-name demo-iac

Describe a stack

Delete a stack



aws cloudformation delete-stack —stack-name demo-iac

Change Sets



https://aws.amazon.com/blogs/aws/new-change-sets-for-aws-cloudformation/

https://aws.amazon.com/blogs/aws/new-change-sets-for-aws-cloudformation/

aws cloudformation estimate-template-cost --template-body file://Template.yaml

--parameters file://Params.json;



Cost estimation



Best Practices



Planning and organizing

• organize stacks by lifecycle and ownership • reuse templetes for various environments • use nested stacks



Creating templates• don’t embed credentials in templates • validate templates before using them • use parameter constraints



Managing stacks

• use stack policies • use change sets • manage all stack resources through cloudformation • use code reviews and revision for your templates

Ready to use templates



• https://github.com/awslabs/aws-cloudformation-templates

• https://github.com/widdix/aws-cf-templates

https://github.com/awslabs/aws-cloudformation-templates

https://github.com/widdix/aws-cf-templates

Library to create AWS CloudFormation descriptions



• https://github.com/cloudtools/troposphere

https://github.com/cloudtools/troposphere

Other resources



• Infrastructure as Code by Kief Morris

http://infrastructure-as-code.com/

• Martin Fowler’s Infrastructure as Code at YOW! 2016:

https://www.youtube.com/watch?v=ueAef9tNUck

http://martinfowler.com/bliki/InfrastructureAsCode.html

• Great blog on AWS:

https://cloudonaut.io/

Step by step automate all



infrastructure as code with aws cloudformation

Technology