upload-legacy-ami.yml

name: Upload Legacy Amazon Image
permissions:
  contents: read
on:
  # TODO: Remove before merge
  pull_request:
  workflow_dispatch:
  schedule:
    - cron: '0 0 * * 0' 
env:
  AWS_REGION: eu-central-1
jobs:
  upload-ami:
    name: Upload Legacy Amazon Image
    runs-on: ubuntu-latest
    environment: images
    permissions:
      contents: read
      id-token: write
    strategy:
      matrix:
        system:
          - x86_64-linux
          - aarch64-linux
    steps:
      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
      - uses: DeterminateSystems/nix-installer-action@cd46bde16ab981b0a7b2dce0574509104543276e # v9
      - uses: DeterminateSystems/magic-nix-cache-action@8a218f9e264e9c3803c9a1ee1c30d8e4ab55be63 # v2

      # NOTE: We download the AMI from Hydra instead of building it ourselves
      # because aarch64 is currently not supported by AWS EC2 and the legacy
      # image builder requires nested virtualization.
      - name: Download AMI from Hydra
        id: download_ami
        run: |
          out=$(curl --location --silent --header 'Accept: application/json' https://hydra.nixos.org/job/nixos/release-23.11/nixos.amazonImage.${{ matrix.system }}/latest-finished  | jq --raw-output '.buildoutputs.out.path')
          nix-store --realise "$out" --add-root ./result
          echo "image_info=$out/nix-support/image-info.json" >> "$GITHUB_OUTPUT"

      - uses: aws-actions/configure-aws-credentials@010d0da01d0b5a38af31e9c3470dbfdabdecca3a # v4.0.1
        with:
          role-to-assume: arn:aws:iam::${{ vars.AWS_ACCOUNT_ID }}:role/upload-ami
          aws-region: ${{ env.AWS_REGION }}

      # NOTE: We do not pass run-id as we're not  building the image ourselves
      # and we thus need to poll hydra periodically.  Including the run-id would
      # cause us to register  the same snapshot as an image over and over again
      # for each run.
      - name: Upload Smoke test AMI
        id: upload_smoke_test_ami
        run: |
          image_info='${{ steps.download_ami.outputs.image_info }}'
          images_bucket='${{ vars.IMAGES_BUCKET }}'
          image_ids=$(nix run .#upload-ami -- \
            --image-info "$image_info" \
            --prefix "staging-legacy/" \
            --s3-bucket "$images_bucket")
          echo "image_ids=$image_ids" >> "$GITHUB_OUTPUT"

      - name: Smoke test
        id: smoke_test
        run: |
          image_ids='${{ steps.upload_smoke_test_ami.outputs.image_ids }}'
          image_id=$(echo "$image_ids" | jq -r '.["${{ env.AWS_REGION }}"]')
          nix run .#smoke-test -- --image-id "$image_id" --region "${{ env.AWS_REGION }}"

      - name: Upload AMIs to all available regions
        run: |
          image_info='${{ steps.download_ami.outputs.image_info }}'
          images_bucket='${{ vars.IMAGES_BUCKET }}'
          image_ids=$(nix run .#upload-ami -- \
            --image-info "$image_info" \
            --prefix "legacy/" \
            --s3-bucket "$images_bucket" \
            --copy-to-regions)
          echo "image_ids=$image_ids" >> "$GITHUB_OUTPUT"