What is the way to utilize Python FastAPI for retrieving secret values from a K8 cluster?

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To utilize Python FastAPI for retrieving secret values from a K8 cluster, you can use the kubernetes module in Python to interact with the Kubernetes API and retrieve the secrets.

1. Install the dependencies:

pip install kubernetes
pip install fastapi

1. Import the necessary modules:

from kubernetes import client, config
from fastapi import FastAPI

1. Load the Kubernetes configuration:

config.load_incluster_config()

1. Use a Kubernetes client to retrieve the secrets:

v1 = client.CoreV1Api()
secrets = v1.list_secret_for_all_namespaces().items

1. Create a FastAPI endpoint to retrieve the secrets:

app = FastAPI()

@app.get("/secrets")
def get_secrets():
    secrets = []
    v1 = client.CoreV1Api()
    secrets = v1.list_secret_for_all_namespaces().items
    return secrets

1. Optionally, you can filter the secrets based on specific criteria such as the namespace or the secret type:

# Get secrets for the 'default' namespace
secrets = v1.list_namespaced_secret(namespace='default').items

# Get secrets of type 'Opaque'
secrets = [s for s in secrets if s.type == 'Opaque']

1. Run the FastAPI application:

if __name__ == "__main__":
    uvicorn.run(app, host="0.0.0.0", port=8000)

You can then query the endpoint to retrieve the secrets:

curl http://localhost:8000/secrets