How to Deploy Azure Function: Simple Steps for Beginners

To deploy an Azure Function, first create your function app locally, then use the Azure CLI or Visual Studio Code with the Azure Functions extension to publish it to Azure. This process uploads your code and configures the function to run in the cloud.

Syntax

Deploying an Azure Function typically uses the az functionapp command in Azure CLI or the Deploy to Function App option in Visual Studio Code.

Key parts of the Azure CLI command:

• az functionapp create: Creates a new function app in Azure.
• az functionapp deployment source config-zip: Deploys your zipped function code.
• --resource-group: Specifies your Azure resource group.
• --name: The name of your function app.
• --src: Path to your zipped function code.

bash

az functionapp create --resource-group <resource-group> --consumption-plan-location <location> --runtime <runtime> --functions-version 4 --name <function-app-name> --storage-account <storage-account>
az functionapp deployment source config-zip --resource-group <resource-group> --name <function-app-name> --src <path-to-zip-file>

Example

This example shows how to deploy a simple Azure Function written in JavaScript using Azure CLI.

It creates a function app and deploys the zipped code.

bash

az group create --name MyResourceGroup --location eastus
az storage account create --name mystorageacct123 --location eastus --resource-group MyResourceGroup --sku Standard_LRS
az functionapp create --resource-group MyResourceGroup --consumption-plan-location eastus --runtime node --functions-version 4 --name MyUniqueFunctionApp123 --storage-account mystorageacct123
zip -r functionapp.zip .
az functionapp deployment source config-zip --resource-group MyResourceGroup --name MyUniqueFunctionApp123 --src functionapp.zip

Output

Resource group 'MyResourceGroup' created.
Storage account 'mystorageacct123' created.
Function app 'MyUniqueFunctionApp123' created.
Deployment successful.

Common Pitfalls

Common mistakes when deploying Azure Functions include:

• Using a function app name that is not globally unique, causing deployment failure.
• Not creating or linking a storage account, which is required for function apps.
• Deploying without zipping the function code or specifying the wrong path.
• Forgetting to select the correct runtime version matching your code.

Always verify your resource group, storage account, and function app names before deployment.

bash

Wrong:
az functionapp create --resource-group MyResourceGroup --name MyFunctionApp --runtime node

Right:
az functionapp create --resource-group MyResourceGroup --name MyUniqueFunctionApp123 --runtime node --storage-account mystorageacct123

Quick Reference

Summary tips for deploying Azure Functions:

• Use az functionapp create to set up your function app with a unique name and storage account.
• Package your function code as a zip file before deployment.
• Deploy using az functionapp deployment source config-zip with correct resource group and app name.
• Use Visual Studio Code Azure Functions extension for a GUI-based deployment.
• Check Azure Portal to monitor your function app status after deployment.

Key Takeaways

Always create a unique function app name and link a storage account before deployment.

Package your function code as a zip file for smooth deployment.

Use Azure CLI commands or Visual Studio Code Azure Functions extension to deploy.

Verify runtime and resource group settings match your function code.

Monitor your function app in Azure Portal after deployment to confirm success.