@Marvin I want to build docker image, but I need to do it not on machine where Prefect server is running, but on machine of specific work pool. Is there a way to do it?

To build a Docker image on a machine associated with a specific work pool in Prefect, you can utilize Prefect's work pools and workers system. Here's a concise guide on how to achieve this: 1. Set Up a Docker Work Pool: - Navigate to the Prefect UI and access the Work Pools tab. - Verify or create a Docker work pool (e.g.,

my-docker-pool

). 2. Start a Worker on the Target Machine: - On the machine where you want to build the Docker image, ensure Prefect is installed. - Start a worker that will poll the Prefect API for scheduled flow runs. This worker should be associated with your Docker work pool. - Use the command:

bash
     prefect worker start my-docker-pool

- Keep this terminal session active, or run the worker as a daemonized process in production. 3. Deploy Your Flow: - Deploy your flow to the Prefect server and configure it to run on the Docker work pool you set up. 4. Execution: - The worker on the specific machine will pick up the flow runs and execute them, allowing you to build Docker images on that machine. For more detailed instructions, you can refer to the Prefect Docker Infrastructure Examples. If you have any more questions or need further assistance, feel free to ask.

@Marvin but how to define build_docker_image step in deployment yaml file?

To define a

build_docker_image

step in a Prefect deployment YAML file, you can use the

prefect_docker.deployments.steps.build_docker_image

step. This step is designed to produce fields called

image_name

and

tag

, which are essential for building Docker images during deployment. Here's a basic example of how you might structure this in your

prefect.yaml

file:

yaml
build:
  - prefect_docker.deployments.steps.build_docker_image:
      requires: prefect-docker
      image_name: my-image
      tag: latest

### Key Points: -

image_name

: Specifies the name of the Docker image. -

tag

: Specifies the tag for the Docker image. Ensure that you have the

prefect-docker

package installed as it is required for this step. You can manage multiple deployments within the same

prefect.yaml

file by adding different deployment configurations. For more details, you can refer to the Prefect YAML Documentation. If you have further questions or need additional assistance, feel free to ask.