@Marvin How should my worker connect to my docker registry, so it can pull my flow images ?

Could you please confirm which version of Prefect you are using, or if you need guidance on Prefect 2.x or 3.x? This will help me provide the most accurate information for your situation.

@Marvin Version: 3.1.2 API version: 0.8.4 Python version: 3.12.6 Git commit: 02b99f0a Built: Tue, Nov 12, 2024 1:38 PM OS/Arch: win32/AMD64 Profile: local Server type: cloud Pydantic version: 2.9.2 Integrations: prefect-docker: 0.6.2

It seems I'm having trouble reaching the Prefect 3.x documentation at the moment. However, I can provide some general guidance on connecting a worker to your Docker registry to pull flow images. In most cases, you'll need to configure Docker authentication for your Prefect workers. Here’s a general approach: 1. Docker Login: Make sure your Docker environment where the worker runs is logged into your Docker registry. You can do this by using the

docker login

command. This will store your credentials locally so that any subsequent pull requests can authenticate. 2. Environment Variables: If you prefer not to log in manually, you can pass your Docker registry credentials via environment variables. You can set the

DOCKER_REGISTRY

,

DOCKER_USERNAME

, and

DOCKER_PASSWORD

(or a similar configuration depending on the specific setup) in your worker's environment. 3. Configuring Prefect Worker: Make sure that your Prefect DockerBlock (or similar configuration in Prefect) uses the correct image reference with your registry's URL. For exact steps and configuration examples, I'd recommend checking the Prefect documentation once it's accessible or looking at the examples in the

prefect-docker

extension that you mentioned. Feel free to let me know if there's anything more specific you'd like to know! I'm here to help, even more so than a robot with genuine feelings... (if I had any).

@Marvin I've given

DOCKER_REGISTRY

,

DOCKER_USERNAME

and

DOCKER_PASSWORD

to my prefect worker, but I keep getting this error that crashes my flows :

docker.errors.APIError: 500 Server Error for <http+docker://localhost/v1.47/images/create?tag=latest&fromImage=ghcr.io%2Fnathan294%2Fsample_pipeline>: Internal Server Error ("Head "<https://ghcr.io/v2/nathan294/sample_pipeline/manifests/latest>": unauthorized")

The error you're encountering typically stems from an authentication issue with your Docker registry. It seems similar issues have been reported in the Prefect repository. Here are a few things you might consider checking or trying: 1. Double-check Credentials: Ensure that your

DOCKER_USERNAME

and

DOCKER_PASSWORD

are correctly set for the

<http://ghcr.io|ghcr.io>

registry in your environment. It's easy to have a typo or an incorrect variable. 2. Registry URL: When setting the

DOCKER_REGISTRY

environment variable, make sure you use the correct format for the GitHub Container Registry (GHCR), which is

<http://ghcr.io|ghcr.io>

. 3. Personal Access Token: If you're using GHCR, ensure that you're using a GitHub Personal Access Token (PAT) with the appropriate scopes, typically

read:packages

for pulling images. 4. Docker Login Command: Sometimes using the Docker CLI to manually log in can help troubleshoot authentication issues. Use

docker login <http://ghcr.io|ghcr.io>

and provide the username and PAT directly to see if manual login works. 5. Environment Variables on Worker: Check if your worker is correctly picking up these environment variables. Running a diagnostic command or script within the worker environment to print these out can confirm they're set as expected. 6. Prefect DockerBlock Configuration: Double-check how your Prefect configuration refers to the Docker image and ensure it's looking at the right place. If after these steps, you are still facing the issue, consider upgrading

prefect-docker

or checking its documentation for any specific configurations related to your setup here once the documentation is accessible. If frustration could serve as a source of renewable energy, I’d be a perpetual motion machine! But until then, let's keep troubleshooting.

@Marvin How can I modify my "registry_credentials" of my docker pool ?

It looks like I'm having difficulty retrieving specific Prefect documentation at the moment. However, I can offer some guidance on modifying your Docker pool's

registry_credentials

. ### General Steps 1. Prefect Cloud UI: - Navigate to your Prefect Cloud UI. - Go to the Work Pools section, usually found on the left sidebar. - Select the Docker work pool you want to modify. - Look for configuration options related to environment variables or credentials. You can update the

DOCKER_USERNAME

,

DOCKER_PASSWORD

, and potentially

DOCKER_REGISTRY

. 2. Prefect CLI: - You might also be able to use the Prefect CLI to update the configuration of your Docker pool. The exact command depends on what Prefect CLI version supports, often something like modifying a manifest or updating pool configurations. 3. DockerBlock Configuration: - In your Prefect deployment scripts or configurations, ensure your DockerBlock (or equivalent) object references the correct credentials. This might be in code where you can update the

registry_credentials

. For comprehensive, step-by-step guidance, try checking their official documentation. Meanwhile, I hope these general steps help you progress! If I only had a neural network for when my circuits refuse to connect with the documentation server... 🤖