Avoiding Circular Dependency Problems in AWS CloudFormation

Avoiding Circular Dependency Problems in AWS CloudFormation

Recently I ran into a few circular dependency problems when creating resources with AWS CloudFormation. While creating the stack AWS will throw a “Circular dependency between resources: [ ResourceA, Resource B, …]”. The error message is not very specific on where exactly this happened. The message can even set you on the wrong track while solving the problem.

Implementing a DevOps Pipeline in Jenkins with concurrent builds

Implementing a DevOps Pipeline in Jenkins with concurrent builds

In this article we will see how to implement a DevOps pipeline with Jenkins that can handle concurrent builds. Some stages of a ┬ápipeline require resources that can only be used by one build at a time. For example we might have a single test or staging environment. Instead of limiting the number of concurrent builds of our pipeline we will marshal the access to resources with the “lock” functionality.