KubeCon + CloudNativeCon Europe 2019

Creating a repeatable Kubernetes application deployment pipeline with the Bazel build system offers a number of advantages over traditional Kubernetes application CI/CD approaches. We will describe how Etsy uses Bazel, along with its container and Kubernetes support, to deploy many different services to multiple different clusters and environments.

Using a repeatable build process maximizes container layer caching and takes advantage of Kubernetes built in pod template hashing. With this caching in place, it becomes feasible to deploy all services in a large repo reliably without under-deploying -- not deploying changed components, leaving them unvalidated on master -- or over-deploying, waiting for a potentially expensive rollout despite not having made changes.

Bazel's rules_docker also allow you to build deterministic container images without the Docker daemon, simplifying CI/CD.