@Marvin, can I use an environment variable in my prefect.yaml configuration?

Yes, you can use environment variables in your

prefect.yaml

configuration. You can achieve this by referencing the environment variables using double curly brackets. This allows for dynamic evaluation of the variables at runtime. For example, you could reference an environment variable in your

prefect.yaml

file like so:

yaml
# Define a variable in Prefect UI or programmatically
# Set example environment variable
"{{ prefect.variables.my_variable }}"

# Usage in prefect.yaml
deployments:
  - name: my-flow-deployment
    work_pool:
      name: my-work-pool
    job_variables:
      env:
        MY_VAR: "{{ prefect.blocks.secret.my_secret }}"

Here are a few more useful resources that you might want to look into: - Prefect Variables Guide - Settings in Prefect ### Note Be careful when placing sensitive data in your configuration. You might want to use Prefect's blocks and secrets to manage sensitive information securely. If you encounter issues with environment variables not being applied as expected, you might want to check these related GitHub issues: - Environment variables not showing in Google Cloud Run - Env vars set from Prefect Secret in prefect.yaml showing raw value I hope this helps in setting up your environment variables in

prefect.yaml

effectively. If you have any more questions or need further assistance, feel free to ask.

@Marvin, how do I use an environment variable in my prefect.yaml file?

To use an environment variable in your

prefect.yaml

file, you can refer to Prefect's support for variables using double curly brackets. Below are the steps and an example configuration. ### Steps to Use Environment Variables 1. Declare the Variable in Prefect: - You can set a variable either through the Prefect UI or programmatically. For example:

python
      from prefect import variables
      variables.set(name="my_variable", value="some_value")

2. Reference It in `prefect.yaml`: - Use double curly brackets to reference the variable in the

prefect.yaml

file. ### Example

prefect.yaml

Configuration Here is an example of how you might set up and use an environment variable in your

prefect.yaml

file:

yaml
# prefect.yaml

# General metadata about this project
name: my-project
prefect-version: 2.13.4

# Build section for managing and building docker image
build:
  - prefect_docker.deployments.steps.build_docker_image:
      id: build_image
      requires: prefect-docker>=0.3.1
      image_name: us-docker.pkg.dev/prefect-project/my-artifact-registry/my-custom-image
      tag: latest
      dockerfile: auto
      platform: linux/amd64

# Push section for managing how this project is uploaded to remote locations
push:
  - prefect_docker.deployments.steps.push_docker_image:
      requires: prefect-docker>=0.3

# Define deployments with environment variables
deployments:
  - name: my-flow-deployment
    work_pool:
      name: my-k8s-pool
    job_variables:
      env:
        MY_VAR: "{{ prefect.variables.my_variable }}"

In this configuration: -

MY_VAR

is an environment variable whose value is fetched from

prefect.variables.my_variable

. ### Setting Environment Variables Using Prefect Blocks If you're handling secrets, you may want to use Prefect's blocks. Here’s a concise example:

yaml
# Reference secret in prefect.yaml
deployments:
  - name: my-flow-deployment
    work_pool:
      name: my-ecs-pool
    job_variables:
      env:
        REDSHIFT_PW: "{{ prefect.blocks.secret.password }}"

### Additional Tips - Ensure to define your variables before using them. - Keep sensitive information secure by using Prefect's secrets management. ### Related Resources - Prefect Variables Guide - Secrets and Blocks By following these steps, you can effectively use environment variables in your

prefect.yaml

file, ensuring dynamic and flexible configurations. If you have more questions or need further assistance, feel free to ask.