Automating Infrastructure with Drone CI and Terraform

This document outlines how to leverage Drone CI to automate your infrastructure management using Terraform. By integrating Terraform into your CI/CD pipeline, you can ensure consistent, repeatable, and version-controlled infrastructure deployments.

Drone CI Pipeline Configuration for Terraform

The following YAML configuration demonstrates a typical Drone CI pipeline for managing infrastructure with Terraform. It includes steps for setting up AWS credentials, initializing Terraform, planning changes, and applying them.

---
kind: pipeline
type: docker
name: default

steps:
- name: setup-aws-credentials
  image: busybox
  environment:
    AWS_CREDENTIALS:
      from_secret: AWS_CREDENTIALS
  commands:
  - mkdir -p $$DRONE_WORKSPACE/.aws
  - echo $${AWS_CREDENTIALS} | base64 -d > $$DRONE_WORKSPACE/.aws/credentials
  - chmod 0400 $$DRONE_WORKSPACE/.aws/credentials
  volumes:
  - name: cache
    path: /tmp

- name: create-test-file
  image: busybox
  commands:
  - echo $$DRONE_COMMIT > infra/test.txt
  volumes:
  - name: cache
    path: /tmp

- name: terraform-init
  image: hashicorp/terraform:light
  commands:
  - terraform -chdir=./infra init
  volumes:
  - name: cache
    path: /tmp

- name: terraform-plan
  image: hashicorp/terraform:light
  commands:
  - terraform -chdir=./infra plan
  volumes:
  - name: cache
    path: /tmp

# to promote step see:
# https://vitobotta.com/2019/10/09/ci-cd-with-drone-for-deployment-to-kubernetes-with-helm/
- name: terraform-apply
  image: hashicorp/terraform:light
  commands:
  - terraform -chdir=./infra apply -input=false -auto-approve
  volumes:
  - name: cache
    path: /tmp

volumes:
- name: cache
  temp: {}

Terraform Execution and Best Practices

This section details the execution flow of the Terraform commands within the Drone CI pipeline. It's crucial to manage your Terraform state securely and efficiently. For more advanced scenarios and best practices, refer to the official Terraform documentation and community resources.

Further Resources for Terraform and CI/CD

To deepen your understanding and explore more advanced configurations, consider these external resources:

• Terraform Documentation
• Drone CI Docker Pipeline Documentation
• Install Terraform CLI