Hi all, I'm working on our migration from Prefect 1 to 2, especially for the deployment. With Prefect 1, I build my Docker image, push to Artifact Registry in GCP, then I register my flow to Prefect Cloud (and adding some parameters like CronSchedule, Dask runner, etc...). Is this always a good way to deploy a flow with Prefect 2? I can't find any example with a private GCP registry for Docker image.

This is certainly doable in Prefect 2! Prefect projects (not to be confused with the folder concept in Prefect 1 project) allow you to specify a build step that most commonly entails building an image. Then you can set up a prefect worker in GCP. What type of GCP service? GKE, Cloud Run Jobs. etc?

Thank you ! I update my Prefect version to avoid Projects, looks great. With my Prefect 1 setup, I use GKE I try to make a simply and dummy deployment but I can't upload my docker image on a private registry. I specify my url (like

<http://eu.gcr.io|eu.gcr.io>

for GCP) but the log indicates an other URL

docker.errors.APIError: 500 Server Error for <http+docker://localhost/v1.42/auth>: Internal Server Error ("Get "<https://eu.gcr.io/v2/>": unauthorized: Not Authorized.")

I create a block with

docker-registry-credentials

to store my credentials.

Hi Florent: Something like this example may help: https://docs.prefect.io/latest/concepts/projects/#the-build-section:~:text=As%20discussed%20above[…]secure%20and%20dynamic%20credentials%20access%3A

For the moment, I have my credentials parameters (via a block) like this :

build:
    - prefect_docker.projects.steps.build_docker_image:
        requires: prefect-docker
        image_name: repo-name/image-name
        tag: dev
        dockerfile: Dockerfile
        push: True
        credentials: "{{ prefect.blocks.docker-registry-credentials.dev-registry }}"

In the build section, not in the push, because

prefect_docker

doesn't have a push method, all is done in the build. But I'm not sure : I have to use

prefect_docker

to build and then

prefect_gcp

to push? Or all is done by

prefect_docker

. Maybe I misunderstand

No you are right I believe. IIRC the build step refers to docker containers and the push step refers to pushing flow code updates.

Thank you @Taylor Curran, let me know when you have more infos 🙏