Real world DevOps with Nix

This example project is meant to demonstrate the power of [Nix] in a DevOps context. You can see this repo in action in my talk [Real world DevOps with Nix][video], which was part of the [Summer of Nix][son] video series in 2022.

Moving parts

• A very simple "TODOs" web service written in [Go] in

cmd/todos/main.go. This service is built to be deployed on a [Kubernetes] cluster running on [Digital Ocean][do].

• That cluster is stood up using a [Terraform] configuration in

main.tf and terraform.tfvars.

• The Kubernetes configuration in k8s/deployment.yaml

defines the Kubernetes [Deployment] for the service.

• The [GitHub Actions][actions] pipeline

* Builds a [Docker] image for the TODOs service using [Nix] * Pushes the image to [Docker Hub][hub] * Updates the existing [Deployment] to use the new image * Restarts the [Deployment] to complete the upgrade

Some other things to note:

• The Kubernetes configuration for the Digital Ocean cluster, named

real-world-devops-with-nix, is provided under the KUBE_CONFIG environment variable in the CI pipeline. To get that configuration as a base64 string:

doctl kubernetes cluster kubeconfig show real-world-devops-with-nix | base64

[actions]: https://github.com/features/actions [deployment]: https://kubernetes.io/docs/concepts/workloads/controllers/deployment [docker]: https://docker.com [do]: https://digitalocean.com [go]: https://golang.org [hub]: https://hub.docker.com [kubernetes]: https://kubernetes.io [nix]: https://nixos.org [son]: https://www.youtube.com/playlist?list=PLt4-lkyRrOMWyp5G-md1wtTcbBaOxZk [terraform]: https://terraform.io [video]: https://www.youtube.com/watch?v=LjyQ7baj-KM&t=2809s