> ## Documentation Index
> Fetch the complete documentation index at: https://upstash.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Azure Functions

<Snippet file="redis/start-redis-note.mdx" />

<Card title="GitHub Repository" icon="github" href="https://github.com/upstash/redis-js/tree/main/examples/azure-functions" horizontal>
  You can find the project source code on GitHub.
</Card>

### Prerequisites

1. [Create an Azure account.](https://azure.microsoft.com/en-us/free/)
2. [Set up Azure CLI](https://learn.microsoft.com/en-us/cli/azure/install-azure-cli)
3. [Install the Azure Functions Core Tools](https://learn.microsoft.com/en-us/azure/azure-functions/create-first-function-cli-typescript)

### Project Setup

Initialize the project:

```shell theme={"system"}
func init --typescript
```

Install `@upstash/redis`

```shell theme={"system"}
npm install @upstash/redis
```

### Counter Function Setup

Create a new function from template.

```shell theme={"system"}
func new --name CounterFunction --template "HTTP trigger" --authlevel "anonymous"
```

Update `/src/functions/CounterFunction.ts`

```ts /src/functions/CounterFunction.ts theme={"system"}
import { app, HttpRequest, HttpResponseInit, InvocationContext } from "@azure/functions";
import { Redis } from "@upstash/redis";

const redis = new Redis({
    url: process.env.UPSTASH_REDIS_REST_URL,
    token: process.env.UPSTASH_REDIS_REST_TOKEN
});

export async function CounterFunction(request: HttpRequest, context: InvocationContext): Promise<HttpResponseInit> {
    const count = await redis.incr("counter");

    return { status: 200, body: `Counter: ${count}` };
};

app.http('CounterFunction', {
    methods: ['GET', 'POST'],
    authLevel: 'anonymous',
    handler: CounterFunction
});
```

### Create Azure Resources

You can use the command below to find the `name` of a region near you.

```shell theme={"system"}
az account list-locations
```

Create a resource group.

```shell theme={"system"}
az group create --name AzureFunctionsQuickstart-rg --location <REGION>
```

Create a storage account.

```shell theme={"system"}
az storage account create --name <STORAGE_NAME> --location <REGION> --resource-group AzureFunctionsQuickstart-rg --sku Standard_LRS --allow-blob-public-access false
```

Create your Function App.

```shell theme={"system"}
az functionapp create --resource-group AzureFunctionsQuickstart-rg --consumption-plan-location <REGION> --runtime node --runtime-version 18 --functions-version 4 --name <APP_NAME> --storage-account <STORAGE_NAME>
```

### Database Setup

Create a Redis database using [Upstash Console](https://console.upstash.com) or [Upstash CLI](https://github.com/upstash/cli) and set `UPSTASH_REDIS_REST_URL` and `UPSTASH_REDIS_REST_TOKEN` in your Function App's settings.

```shell theme={"system"}
az functionapp config appsettings set --name <APP_NAME> --resource-group AzureFunctionsQuickstart-rg --settings UPSTASH_REDIS_REST_URL=<YOUR_URL> UPSTASH_REDIS_REST_TOKEN=<YOUR_TOKEN>
```

### Deploy

Take a build of your application.

```shell theme={"system"}
npm run build
```

Publish your application.

```shell theme={"system"}
func azure functionapp publish <APP_NAME>
```

Visit the given Invoke URL.