@Marvin How can I specify an image for a workflow run in Prefect 2.x?

In Prefect 2.x, you can specify a Docker image for a workflow run by configuring a Docker worker. Here's a basic outline of how you can set the image: 1. Define Your Docker Image: Create a Docker image that contains all the dependencies your flow requires. 2. Configure the Worker: Use a Docker worker to specify the image. You can set the image in the deployment manifest, typically within a Kubernetes cluster setup. Here's a snippet of what the deployment might look like:

yaml
   template:
     metadata:
       labels:
         flow: your-flow-name
     spec:
       containers:
       - name: flow-container
         image: your-docker-image:latest
         imagePullPolicy: IfNotPresent

3. Deploy the Manifest: Apply this configuration using Kubernetes:

bash
   kubectl apply -f your-deployment-manifest.yaml

4. Set Environment Variables: Ensure that your environment variables, like

PREFECT_API_URL

, are correctly set if you're using Prefect Server. For more details, you can refer to the Prefect Docker Integration Guide.

How can I specify an image url for a workflow in the additional options > job variables?

In Prefect 2.x, you can specify a Docker image URL for a workflow by using job variables in the deployment configuration. Here's how you can do it: 1. Define Job Variables: You can override the default infrastructure settings by specifying job variables. This includes setting the Docker image URL. 2. CLI Usage: Use the

--job-variable

flag to pass in the image URL when running a deployment from the command line. For example:

bash
   prefect deployment run \
   --id "your-deployment-id" \
   --job-variable image="your-registry/your-image:tag"

3. Deployment Script: You can also specify the image directly in the deployment script using the

job_variables

parameter:

python
   if __name__ == "__main__":
       your_flow.deploy(
           name="your-deployment-name",
           work_pool_name="your-work-pool",
           job_variables={"image": "your-registry/your-image:tag"},
       )

4. UI Configuration: If you're using the Prefect UI, you can input the image URL in the additional options under job variables. For more detailed guidance, refer to the Prefect documentation on overriding job variables.

@Marvin What is the url variable name?

The variable name for specifying the Docker image URL in job variables is

image

. You can use this variable to set the image URL in your deployment configuration.

@Marvin Where do the job variables get displayed in the Prefect 2.x flow run UI?

The Prefect 2.x documentation doesn't explicitly mention where job variables are displayed in the Prefect UI. Typically, job variables are used to configure the flow run environment and may not have a dedicated display section in the UI. They are primarily utilized during deployment to customize the infrastructure settings for a flow run. If you're looking to verify the job variables, you might need to check the deployment configuration or logs where these variables are applied. For more detailed information, you can refer to the Prefect documentation on overriding job variables.