--- title: "Deploying Serverless Applications with Azure Functions" description: "A minimal Azure Native Function in Python with Pulumi program" url: "https://www.pulumi.com/dev/examples/azure-py-functions/" image: "https://www.pulumi.com/assets/og/dev/examples/azure-py-functions.png" --- # Deploying Serverless Applications with Azure Functions A minimal Azure Native Function in Python with Pulumi program - Source on GitHub: https://github.com/pulumi/examples/tree/master/azure-py-functions ## Get started with this example This example lives in the [pulumi/examples](https://github.com/pulumi/examples/tree/master/azure-py-functions) repo. Pull down just this directory to follow along: ```bash git clone --filter=blob:none --sparse https://github.com/pulumi/examples pulumi-examples git -C pulumi-examples sparse-checkout set azure-py-functions cd pulumi-examples/azure-py-functions ``` You will deploy a Azure Function Apps with HTTP-triggered serverless functions in python ## Running the App 1. Login to Azure CLI (you will be prompted to do this during deployment if you forget this step): ``` $ az login ``` 1. Create a new stack: ``` $ pulumi stack init dev ``` 1. Create a virtual environment and install python dependencies ### Windows Run the following command to create a virtual environment ```bash python -m venv venv ``` Activate the environment: ```bash venv\Scripts\activate ``` Install dependencies: ```bash pip3 install -r requirements.txt ``` ### Mac and Linux Run the following command to create a virtual environment ```bash python3 -m venv venv ``` Activate the environment: ```bash source venv/bin/activate ``` Install dependencies: ```bash pip3 install -r requirements.txt ``` At this point, dependencies will be installed into your virtual environment. **If you close your terminal at any time**, you may need to re-activate the environment: ```bash source venv/bin/activate ``` 1. Configure the location to deploy the resources to. The Azure region to deploy to is pre-set to **WestUS** - but you can modify the region you would like to deploy to. ```bash pulumi config set azure-native:location eastus2 ``` [pulumi config set](https://www.pulumi.com/docs/reference/cli/pulumi_config_set/) allows us to pass in [configuration values](https://www.pulumi.com/docs/intro/concepts/config/#setting-and-getting-configuration-values) from the command line. Feel free to choose any Azure region that supports the services used in these labs ([see this infographic](https://azure.microsoft.com/en-us/global-infrastructure/regions/) for current list of available regions). A list of some of the regions: ``` centralus,eastasia,southeastasia,eastus,eastus2,westus,westus2,northcentralus,southcentralus, westcentralus,northeurope,westeurope,japaneast,japanwest,brazilsouth,australiasoutheast,australiaeast, westindia,southindia,centralindia,canadacentral,canadaeast,uksouth,ukwest,koreacentral,koreasouth, francecentral,southafricanorth,uaenorth,australiacentral,switzerlandnorth,germanywestcentral, norwayeast,jioindiawest,australiacentral2 ``` The command updates and persists the value to the local `Pulumi.dev.yaml` file. You can view or edit this file at any time to effect the configuration of the current stack. 1. Azure Python Function Zip file The applications settings configure the app to run on Python3 deploy the specified zip file to the Function App. The app will download the specified file, extract the code from it, discover the functions, and run them. We’ve prepared this [zip](https://github.com/tusharshahrs/demo/blob/main/content/lab/pulumi/azure-native/python/app/HelloWithPython.zip) file for you to get started faster, you can find its code [here](https://github.com/tusharshahrs/demo/tree/main/content/lab/pulumi/azure-native/python/app). The code contains a single HTTP-triggered Azure Function. 1. Run `pulumi up` to preview and select `yes` to deploy changes: ``` $ pulumi up Previewing update (dev) View Live: https://app.pulumi.com/myuser/azure-py-functions/dev/previews/f3ea-2esdff2-123d-e79d Type Name Plan + pulumi:pulumi:Stack azure-py-functions-dev create + ├─ azure-native:resources:ResourceGroup resourcegroup_functions_py create + ├─ azure-native:web:AppServicePlan consumption-plan create + ├─ azure-native:storage:StorageAccount storageaccount create + └─ azure-native:web:WebApp functionapp create Resources: + 5 to create Do you want to perform this update? [Use arrows to move, enter to select, type to filter] > yes no details Updating (dev) View Live: https://app.pulumi.com/myuser/azure-py-functions/dev/updates/1 Type Name Status + pulumi:pulumi:Stack azure-py-functions-dev created + ├─ azure-native:resources:ResourceGroup resourcegroup_functions_py created + ├─ azure-native:web:AppServicePlan consumption-plan created + ├─ azure-native:storage:StorageAccount storageaccount created + └─ azure-native:web:WebApp functionapp created Outputs: consumptionplan : "consumption-plan7b9df5ed" endpoint : "https://functionappfe054af4.azurewebsites.net/api/HelloWithPython" function_app : "functionappfe054af4" primarystoragekey : "[secret]" resourcegroup : "resourcegroup_functions_py4eba2bf2" storageaccount : "storageaccounta6b2e431" storageaccountkeys : "[secret]" storageconnectionstring: "[secret]" Resources: + 5 created Duration: 50s ``` 1. Check the deployed function endpoints via [pulumi stack output](https://www.pulumi.com/docs/reference/cli/pulumi_stack_output/) ``` $ pulumi stack output endpoint https://functionappfe054af4.azurewebsites.net/api/HelloWithPython 1. You can now open the resulting endpoint in the browser or curl it: ``` $ curl "$(pulumi stack output endpoint)" Hello from Python in Pulumi! You have stood up a serverless function in Azure! ``` ## Cleanup and destroy everything 1. Destroy the stack via: `pulumi destroy` .Select `yes` ``` Previewing destroy (dev) Type Name Plan - pulumi:pulumi:Stack azure-py-functions-dev delete - ├─ azure-native:web:WebApp functionapp delete .. .. Outputs: - endpoint : "https://functionappfe054af4.azurewebsites.net/api/HelloWithPython" .. .. Resources: - 5 to delete Do you want to perform this destroy? [Use arrows to move, enter to select, type to filter] yes > no details .. .. Resources: - 5 deleted Duration: 1m1s ``` 1. Remove the stack ``` pulumi stack rm This will permanently remove the 'dev' stack! Please confirm that this is what you'd like to do by typing ("dev"): ``` Type in the name of your stack: **dev**