I have a simple Github CI file with

jobs:
  build:
    name: Deploy Prefect with Modal Work Pool
    runs-on: ubuntu-latest
    environment: Development
    env:
      MODAL_TOKEN_ID: ${{ secrets.MODAL_TOKEN_ID }}
      MODAL_TOKEN_SECRET: ${{ secrets.MODAL_TOKEN_SECRET }}

    steps:
      - uses: actions/checkout@v4

      - name: Install Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.11"

      - name: Prefect Auth
        uses: PrefectHQ/actions-prefect-auth@v1
        with:
          prefect-api-key: ${{ secrets.PREFECT_API_KEY }}
          prefect-workspace: ${{ secrets.PREFECT_WORKSPACE }}

      - name: Create Work Pool
        run: echo "y" | prefect work-pool create --type modal:push --provision-infra modal-pool || true

      - name: Prefect Deploy
        run: prefect deploy

and a prefect.yaml of

pull:
  - prefect.deployments.steps.git_clone:
      repository: redacted
      branch: feature/prefect-modal-testing
      access_token: "{{ secrets.GITHUB_TOKEN }}"

build:
  - prefect_docker.deployments.steps.build_docker_image:
      requires: prefect-docker
      image_name: arnold/base
      tag: dev
      dockerfile: dockerfiles/Dockerfile.service

push:
  - prefect_docker.deployments.steps.push_docker_image:
      requires: prefect-docker
      image_name: "{{ build-image.image_name }}"
      tag: "{{ build-image.tag }}"
      credentials: "{{ prefect.blocks.docker-registry-credentials.dev-registry }}"
      additional_tags: "{{ build-image.additional_tags }}"

deployments:
  - name: test_model
    entrypoint: modal_apps/modal_prefect_test.py:run_app

When do the pull, build, push steps happen here? I don't see any logs associated with these steps

build and push steps run when you do

prefect deploy

and pull steps run right before the start of a flow run

Awesome, will try this ty

🙌

Is there a way to pull the image that is created in build?

depends on how you want to do things, but one thing I'm not seeing in your deployment is the

work_pool

section

pull:
  - prefect.deployments.steps.git_clone:
      repository: <https://github.com/essexlabs/arnold.git>
      branch: feature/prefect-modal-testing
      access_token: "{{ secrets.GITHUB_TOKEN }}"

build:
  - prefect_docker.deployments.steps.build_docker_image:
      requires: prefect-docker
      image_name: arnold/base
      tag: dev
      dockerfile: dockerfiles/Dockerfile.deps

push: # Prefect blocks add docker stuff
  - prefect_docker.deployments.steps.push_docker_image:
      requires: prefect-docker
      image_name: "{{ build-image.image_name }}"
      tag: "{{ build-image.tag }}"
      credentials: "{{ prefect.blocks.docker-registry-credentials.dev-registry }}"
      additional_tags: "{{ build-image.additional_tags }}"

deployments:
  - name: test_model
    entrypoint: modal_apps/test_modal_app.py:run_app
    work_pool:
      name: modal-pool

I have this now

okay so a couple things to go over here. similar to most CI processes, you'll need to add a step

id

so you can refer to the outputs of previous steps by name

build:
  - prefect_docker.deployments.steps.build_docker_image:
      id: build-image  <-- now "{{ build-image.<output-name> }}" will work in later steps
      requires: prefect-docker
      image_name: arnold/base
      tag: dev
      dockerfile: dockerfiles/Dockerfile.deps

then on your deployment, you can access the combined

image:tag

string as "{{ build-image.image }}"

work_pool:
  name: modal-pool
  job_variables:
    image: "{{ build-image.image }}"

awesome ty

then modal will boot up your image as a container, and then prefect will clone your code into the container's current working directory, find your flow entrypoint, and execute it

perfect ty ty