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🐳 Docker Library

This repository is a centralized place for all my Dockerfiles. With the help of Github Actions the docker images get build + pushed automatically directly to the Azure Container registry, which is managed via Terraform as IaC.

🧱 Components

Library

In the library there is a directory for each and every Dockerfile and its corresponding configuration files. Each and every Dockerfile has a header that looks like the following:

#
# Metadata used by docker-build-and-push.yml GitHub Action Workflow
# IMAGE_NAME: mkdocs
# IMAGE_VERSION: v0.0.1
#

This is required to make the automation work.

Terraform

In the Terraform directory you will find the iac directory, that has all the required code to create the ACR resource in azure. The config directory contains the required variables to make iac work

.github

Contains the required Workflows, a containescan directory which allows certain CVE's and the dependabot configuration.

📄 How to use

Prerequisites

  • You have a Terraform Cloud Account
  • You have an Azure account and have a service principal
  • The service Principal should have Contributor permission assigned on Subscription scope
  • The service Principal must have AcrPush permissions assigned on ACR scope.

What to do?

Configure Terraform Cloud

  • In Terraform Cloud workspace with the same name you choose for the backend.hcl file
  • Configure the Terraform Working directory to terraform/iac
  • Configure the Environment Variable for your Workspace
    • key: TF_CLI_ARGS_plan
    • value: -var-file=../environment/prod/variables.tfvars
  • Configure the following for values in Terraform cloud (using a variable set)
    • subscription_id
    • tenant_id
    • client_id
    • client_secret

Configure Github Actions

The following secrets need to be created in the Github Actions variables

  • AZURE_CREDENTIALS as described here.

    {
    "clientSecret":  "******",
    "subscriptionId":  "******",
    "tenantId":  "******",
    "clientId":  "******"
}

  • REGISTRY_USERNAME The clientId from the JSON above

  • REGISTRY_PASSWORD The clientSecret from the JSON above

  • ACR_LOGIN_SERVER Can be found on the overview page of the ACR