Use Azure Cosmos DB as key-value store for Fermyon Spin

This repository contains a sample application that demonstrates how to use Azure Cosmos DB as key-value store for Fermyon Spin.

Consider reading the corresponding article at https://thorsten-hans.com/azure-cosmos-db-as-key-value-store-for-fermyon-spin/ for a detailed walk-through.

Provision the infrastructure

The infra folder contains a Terraform project which you can use to provision the required infrastructure in Azure. Once you've cloned the repo and installed Terraform on your machine, you can either use a Service Principal for authentication or re-use existing auth tokens from Azure CLI az.

To provision the infrastructure, invoke terraform apply -auto-approve

Configure the Spin App

You must update /app/rt-config.toml with the values provided as output from Terraform. To read the sensitive key output, use terraform output -raw key

Run the Spin application

You can run the Spin app using the Makefile located in the root of this repository. Simply invoke make run

Testing

You can use curl to test the application:

# store some data in the key-value store
curl -iX POST --data 'hello' http://localhost:3000/test

# retrieve data from the key-value store
curl -iX GET http://localhost:3000/test

hello