@Marvin I would like to use the prefect.yaml for my deployments. I have a staging and prod environment. I would like to avoid duplicating deployment entries (like having a staging and a prod deployment defined both in a single yaml). Is there any way to do this with something like environment variables?

In Prefect 3.x, you can indeed use environment variables within the

prefect.yaml

file to manage different deployment configurations without duplicating entries. This allows you to dynamically set values based on your environment (e.g., staging or production). Here's how you can leverage environment variables in your `prefect.yaml`: 1. Environment Variables: You can use syntax like

{{ $MY_ENV_VAR }}

to reference environment variables. This is particularly useful for setting values that change between environments, such as API keys, URLs, or other configuration settings. 2. Multiple Deployments: Prefect supports multiple deployment declarations within a single

prefect.yaml

file. This allows you to manage different configurations for the same flow in one place. You can define separate sections for each environment and use environment variables to toggle between them. For more details, you can refer to the Prefect documentation on YAML templating. Here's an example snippet of how you might structure your `prefect.yaml`:

yaml
deployments:
  - name: my-flow-staging
    parameters:
      api_url: "{{ $STAGING_API_URL }}"
  - name: my-flow-prod
    parameters:
      api_url: "{{ $PROD_API_URL }}"

By setting the environment variables

STAGING_API_URL

and

PROD_API_URL

at runtime, you can switch between configurations without duplicating entire deployment entries.