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Sending response back to CFN custom resource from python Lambda function

By pprakash · December 20, 2015 · AWS, CFN, Cloud, CloudFormation, Lambda, Python, Tech · 9 Comments

CloudFormation uses a pre-signed S3 URL to receive the response back from the custom resources managed by it. There are few blue prints available for Node.js Lambda custom resources but nothing available for python yet. Hence I created this simple function which shall be used to send the response back to CFN custom resource by […]

Continuous Integration – Manage shared resources across accounts automatically

By pprakash · December 7, 2015 · AWS, Cloud, Continuous Integration, IAM, Jenkins, Lambda, Python, Tech · Leave a comment

I prefer creating the base AMI using packer; RDS snapshot using a Jenkins job which get triggered whenever there is a change in the database schema in the SCM. In case of installers, binaries, etc. it would be best to store them in a single S3 bucket. In all the above mentioned scenarios I prefer […]

CloudFormation parameters grouping and labelling

By pprakash · December 6, 2015 · AWS, CFN, Cloud, CloudFormation, Tech · Leave a comment

Last week AWS enhanced CloudFormation by adding new services like AWS CodePipeline, AWS Config, AWS KMS and few more; default stack limit also has been increased from 20 to 200. Among other new features they also have introduced this small but useful parameters grouping and labelling feature. Earlier all the parameters in a CFN template […]

Executing Ruby code in AWS Lambda

By pprakash · November 29, 2015 · AWS, Chef, Lambda, Python, Ruby, Tech · 10 Comments

AWS Lambda supports only Java, JavaScript & Python at the time of writing this post. I was wondering whether I can exploit the Lambda to execute chef’s knife commands on it since Lambda runs on a Linux container. Using simple python function I have identified that the code of the Lambda function gets copied to […]

Automated cross account DNS management through CFN and API access through API gateway

By pprakash · November 27, 2015 · API Gateway, AWS, CFN, CloudFormation, Lambda, NodeJS, Tech · Leave a comment

It’s a general best practice to manage all DNS entries in Route53 in a centralized AWS account. In that case it is difficult to automate the DNS record creation/deletion based on resources created in another AWS account using CloudFormation. CloudFormation doesn’t yet have the capability to create resources in a different AWS account. Combining IAM […]