k8-deploy.yaml

name: 'Inferno Deployment to K8'

on:
  push:
    branches:
    - master
  pull_request:
    branches:
    - master
  workflow_dispatch: # Manual trigger


permissions:
  id-token: write # This is required for requesting the JWT
  contents: read  # This is required for actions/checkout
  pull-requests: write # This is required for posting the comment

jobs:
  terraform-plan:
    name: 'Terraform Plan'
    runs-on: ubuntu-latest
    outputs:
      tfplanExitCode: ${{ steps.tf-plan.outputs.exitcode }}
    env:
      working-dir: "./infra/aws-impl"
    steps:
    # Checkout the repository to the GitHub Actions runner
    - name: Checkout
      uses: actions/checkout@v4

    # Configure AWS credentials
    - name: Configure aws credentials
      uses: aws-actions/configure-aws-credentials@v4
      with:
        role-to-assume: arn:aws:iam::471112546300:role/inferno-github-actions-eks-role
        aws-region: ap-southeast-2


    # Set environment variable based on branch or PR
    - name: Set environment variable
      id: set_env
      run: |
        if [ "${GITHUB_REF}" = "refs/heads/master" ]; then
          echo "ENVIRONMENT=prod" >> $GITHUB_ENV
        else
          echo "ENVIRONMENT=dev" >> $GITHUB_ENV
        fi

    # Install the latest version of the Terraform CLI
    - name: Setup Terraform
      uses: hashicorp/setup-terraform@v3
      with:
        terraform_wrapper: false

    # Initialize a new or existing Terraform working directory by creating initial files, loading any remote state, downloading modules, etc.
    - name: Terraform Init
      run: |
        terraform init -upgrade \
          -backend-config="bucket=examplebucket-fhir-aws" \
          -backend-config="region=ap-southeast-2" \
          -backend-config="key=infra/inferno/au-fhir-inferno-${ENVIRONMENT}.tfstate"
      working-directory: ${{ env.working-dir }}

    # Checks that all Terraform configuration files adhere to a canonical format
    # Will fail the build if not
    - name: Terraform Format
      run: terraform fmt -check
      working-directory: ${{ env.working-dir }}

    # Generates an execution plan for Terraform
    # An exit code of 0 indicated no changes, 1 a terraform failure, 2 there are pending changes.
    - name: Terraform Plan
      id: tf-plan
      working-directory: ${{ env.working-dir }}
      run: |
        export exitcode=0
        terraform plan -var-file="tfvars/${ENVIRONMENT}.tfvars" -detailed-exitcode -no-color -out main.tfplan || export exitcode=$?

        echo "exitcode=$exitcode" >> $GITHUB_OUTPUT
        
        if [ $exitcode -eq 1 ]; then
          echo Terraform Plan Failed!
          exit 1
        else 
          exit 0
        fi
        
    # Save plan to artifacts  
    - name: Publish Terraform Plan
      uses: actions/upload-artifact@v4
      with:
        name: tfplan
        path: ${{ env.working-dir }}/main.tfplan
        
    # Create string output of Terraform Plan
    - name: Create String Output
      id: tf-plan-string
      working-directory: ${{ env.working-dir }}
      run: |
        TERRAFORM_PLAN=$(terraform show -no-color main.tfplan)
        
        delimiter="$(openssl rand -hex 8)"
        echo "summary<<${delimiter}" >> $GITHUB_OUTPUT
        echo "## Terraform Plan Output" >> $GITHUB_OUTPUT
        echo "<details><summary>Click to expand</summary>" >> $GITHUB_OUTPUT
        echo "" >> $GITHUB_OUTPUT
        echo '```terraform' >> $GITHUB_OUTPUT
        echo "$TERRAFORM_PLAN" >> $GITHUB_OUTPUT
        echo '```' >> $GITHUB_OUTPUT
        echo "</details>" >> $GITHUB_OUTPUT
        echo "${delimiter}" >> $GITHUB_OUTPUT
        
    # Publish Terraform Plan as task summary, fails when over 7k characters
    - name: Publish Terraform Plan to Task Summary
      working-directory: ${{ env.working-dir }}
      env:
        SUMMARY: ${{ steps.tf-plan-string.outputs.summary }}
      run: |
        echo "$SUMMARY" >> $GITHUB_STEP_SUMMARY
      
    # If this is a PR post the changes
    - name: Push Terraform Output to PR
      if: github.event_name == 'pull_request'
      uses: actions/github-script@v7
      env:
        SUMMARY: "${{ steps.tf-plan-string.outputs.summary }}"
      with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const body = `${process.env.SUMMARY}`;
            github.rest.issues.createComment({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body: body
            })

  terraform-apply:
    name: 'Terraform Apply'
    if: needs.terraform-plan.outputs.tfplanExitCode == 2
    runs-on: ubuntu-latest
    environment: production
    needs: [terraform-plan]
    env:
      working-dir: "./infra/aws-impl"
    
    steps:
    # Checkout the repository to the GitHub Actions runner
    - name: Checkout
      uses: actions/checkout@v4

    # Configure AWS credentials
    - name: Configure aws credentials
      uses: aws-actions/configure-aws-credentials@v4
      with:
        role-to-assume: arn:aws:iam::471112546300:role/inferno-github-actions-eks-role
        aws-region: ap-southeast-2

    # Set environment variable based on branch or PR
    - name: Set environment variable
      id: set_env
      run: |
        if [ "${GITHUB_REF}" = "refs/heads/master" ]; then
          echo "ENVIRONMENT=prod" >> $GITHUB_ENV
        else
          echo "ENVIRONMENT=dev" >> $GITHUB_ENV
        fi

    # Install the latest version of Terraform CLI and configure the Terraform CLI configuration file with a Terraform Cloud user API token
    - name: Setup Terraform
      uses: hashicorp/setup-terraform@v3
      with:
        terraform_wrapper: false

    # Initialize a new or existing Terraform working directory by creating initial files, loading any remote state, downloading modules, etc.
    - name: Terraform Init
      run: |
        terraform init -upgrade \
          -backend-config="bucket=examplebucket-fhir-aws" \
          -backend-config="region=ap-southeast-2" \
          -backend-config="key=infra/inferno/au-fhir-inferno-${ENVIRONMENT}.tfstate"
      working-directory: ${{ env.working-dir }}

    # Download saved plan from artifacts  
    - name: Download Terraform Plan
      uses: actions/download-artifact@v4
      with:
        name: tfplan
        path: ${{ env.working-dir }}

    # Terraform Apply
    - name: Terraform Apply
      run: terraform apply -auto-approve main.tfplan
      working-directory: ${{ env.working-dir }}