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ohmyyaml

This repository is primarily for education purposes and shows how to scale out infrastructure in terms of workspaces and services at a large scale

This repository effectively deploys a small server displaying an image of a Gopher on the internet.

What the heck is Terragrunt?

A journey into "modern" DevOps deployment practices.

  • Terragrunt
  • Terraform
  • Helm/Docker/Golang

The purpose of this repo is to show a simple app, how its packaged in Docker/Helm then deployed to Kubernetes.

Flow

Terragrunt has two callable Terraform modules

  • The first will deploy an EKS cluster out
  • The second will deploy applications through Terraform helm provider onto the cluster

Requirements

  • AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY
  • TERRAFORM_WORKSPACE_TOKEN for TF cloud
  • CR_PAT for the GitHub container registry

Terragrunt local usage

Terragrunt can operate either using a remote Git tag or with local source mode. Local source mode is ideal for local development.

❯ make terragrunt-plan-infra
cd regional_configurations/eu-west-1/infrastructure_substrate && \
	trap "cd ../../../" SIGINT SIGTERM ERR EXIT && \
	terragrunt plan --terragrunt-source ../../../module_catalogue/infrastructure_substrate
WARN[0000] No double-slash (//) found in source URL /Users/alexjones/Code/ohmyyaml/module_catalogue/infrastructure_substrate. Relative paths in downloaded Terraform code may not work.
Initializing modules...
Downloading terraform-aws-modules/eks/aws 17.24.0 for eks...
- eks in .terraform/modules/eks
- eks.fargate in .terraform/modules/eks/modules/fargate
- eks.node_groups in .terraform/modules/eks/modules/node_groups
Initializing the backend...

Helm OCI Chart

Helm 3 supports OCI for package distribution. Chart packages are able to be stored and shared across OCI-based registries.

There is an additional task in the Makefile to build the OCI chart.

create-oci-helm-chart:
	helm package ./app/charts/ohmyyaml
	helm push ohmyyaml-*.tgz oci://ghcr.io/tibbar/ohmyyaml

To deploy the chart, you need to login to the ghcr.io registry via the docker login command.

echo $CR_PAT | docker login ghcr.io -u USERNAME --password-stdin
> Login Succeeded

See this guide for more information on how to create a personal access token.