@Marvin I am running Prefect in Kubernetes with a Work Pool. How do I get the worker to download an Image from a private docker registry?

To configure a Prefect worker to pull images from a private Docker registry in a Kubernetes environment, you'll typically need to set up the appropriate credentials in a Kubernetes secret and reference that secret in your worker's job template. Here is how you can achieve this: 1. Create a Docker Registry Secret: Kubernetes provides a way to store Docker registry credentials in secrets. Use the following command to create a secret with your Docker registry credentials:

sh
   kubectl create secret docker-registry my-registry-secret \
     --docker-server=<YOUR-DOCKER-REGISTRY-SERVER> \
     --docker-username=<YOUR-USERNAME> \
     --docker-password=<YOUR-PASSWORD> \
     --docker-email=<YOUR-EMAIL>

Replace the placeholders with your actual Docker registry details. 2. Reference the Secret in Your Worker Job Template: Prefect allows you to configure custom job templates for your workers. Here's an example of a Kubernetes job template that uses the Docker registry secret:

yaml
   apiVersion: batch/v1
   kind: Job
   metadata:
     name: prefect-job
   spec:
     template:
       spec:
         imagePullSecrets:
           - name: my-registry-secret
         containers:
           - name: flow-container
             image: <YOUR-IMAGE-NAME>
             # Add other container specs as needed
         restartPolicy: Never

3. Update Your Work Pool Configuration: Update your Prefect work pool to use the custom job template configured above. This can be done via the Prefect UI or CLI. For detailed guides and examples, refer to: - Kubernetes Work Pool - Kubernetes Deployment Guide for Prefect These documents will provide further insights on advanced configurations and using job templates with Prefect workers in Kubernetes. If you encounter specific issues or have more questions, feel free to reach out!

can you also configure this in the prefect.yaml?

Yes, you can configure the Docker registry authentication in the

prefect.yaml

file. Here is an example of how you can reference a Kubernetes secret for your private Docker registry within the

prefect.yaml

file: 1. Create a Docker Registry Secret: If you haven't already, create a secret in Kubernetes that stores your Docker registry credentials:

sh
   kubectl create secret docker-registry my-registry-secret \
     --docker-server=<YOUR-DOCKER-REGISTRY-SERVER> \
     --docker-username=<YOUR-USERNAME> \
     --docker-password=<YOUR-PASSWORD> \
     --docker-email=<YOUR-EMAIL>

2. Reference the Secret in prefect.yaml: Update your

prefect.yaml

file to include a custom job template that uses this secret. Here's an example configuration:

yaml
   version: 2

   name: my-flow
   description: A flow that uses a Docker image from a private registry
   work_pool:
     type: kubernetes
     job_template:
       metadata:
         name: prefect-job
       spec:
         template:
           spec:
             imagePullSecrets:
               - name: my-registry-secret
             containers:
               - name: flow-container
                 image: <YOUR-IMAGE-NAME>
                 # Add other container specs as needed
             restartPolicy: Never

3. Deploying the YAML Configuration: Ensure that your Prefect server or Cloud is configured to use this

prefect.yaml

. Deploy the flow with:

sh
   prefect deployment build -n my-deployment -p my-prefect-project prefect.yaml

For more detailed configuration and additional settings, you can refer to the Prefect documentation linked below: - Kubernetes Deployment Guide - Docker Integration with Prefect These documents provide further details on configuring your Prefect deployments and using custom job templates within

prefect.yaml

.