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Azure Web App With Custom Docker Image

This sample demonstrates a Python Flask web application hosted on an Azure Web App using a custom Docker image. The deployment builds the image from the local src/Dockerfile, creates an Azure Container Registry resource, and configures a Linux Web App to run the custom image in the LocalStack Azure emulator.

Architecture

The sample creates the following Azure resources:

  1. Azure Resource Group: Logical container for all resources in the sample.
  2. Azure Container Registry: Stores the custom Docker image metadata and credentials.
  3. Azure App Service Plan: Linux plan used by the Web App.
  4. Azure Web App: Runs the Flask application from the custom image.

Prerequisites

  • Docker
  • Azure CLI
  • azlocal CLI
  • jq
  • LocalStack for Azure

Deploy

Start LocalStack for Azure and configure Azure CLI interception as described in the repository root README. Then run:

cd samples/web-app-custom-image/python
bash scripts/deploy.sh

The script builds the Docker image from src/, creates the App Service resources, and configures the Web App to use the custom image.

Validate

bash scripts/validate.sh

Invoke The App

bash scripts/call-web-app.sh

The app exposes:

  • / for the HTML page
  • /api/status for a JSON health response

Local Docker Run

You can run the same image directly with Docker:

cd src
docker build -t vacation-planner-webapp:v1 .
docker run --rm -p 8080:80 vacation-planner-webapp:v1
curl http://127.0.0.1:8080/api/status