merge, synchronize AZD template/steps, add redis to dev container

.devcontainer/README.md

@@ -0,0 +1,9 @@
+# .devcontainer directory
+
+This `.devcontainer` directory contains the configuration for a [dev container](https://docs.github.com/codespaces/setting-up-your-project-for-codespaces/adding-a-dev-container-configuration/introduction-to-dev-containers) and isn't used by the sample application.
+
+The dev container configuration lets you open the repository in a [GitHub codespace](https://docs.github.com/codespaces/overview) or a dev container in Visual Studio Code. For your convenience, the dev container is configured with the following:
+
+- Python
+- PostgreSQL
+- [Azure Developer CLI](https://learn.microsoft.com/azure/developer/azure-developer-cli/overview) (so you can run `azd` commands directly).

.devcontainer/devcontainer.json

@@ -1,11 +1,11 @@
 {
-	"name": "msdocs-django-postgresql-sample-app",
+	"name": "msdocs-flask-postgresql-sample-app",
 	"dockerComposeFile": "docker-compose.yml",
 	"service": "app",
 	"workspaceFolder": "/workspace",
 	"features": {
 		"ghcr.io/azure/azure-dev/azd:latest": {}
-    },
+	},
 	"customizations": {
 		"vscode": {
 			// Add the IDs of extensions you want installed when the container is created.
@@ -51,9 +51,9 @@
 			}
 		}
 	},
-	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// Use 'forwardPorts' to make a list of ports inside the container available locally. 5000 is for Flask, and 5432 is for PostgreSQL.
 	"forwardPorts": [
-		8000, 5432
+		5000, 5432
 	],
 	// Use 'postCreateCommand' to run commands after the container is created.
 	// "postCreateCommand": "",

.devcontainer/docker-compose.yml

@@ -21,12 +21,16 @@ services:
     volumes:
       - postgres-data:/var/lib/postgresql/data
     environment:
-      POSTGRES_USER: app_user
       POSTGRES_DB: app
+      POSTGRES_USER: app_user
       POSTGRES_PASSWORD: app_password
 
     # Add "forwardPorts": ["5432"] to **devcontainer.json** to forward PostgreSQL locally.
     # (Adding the "ports" property to this file will not forward from a Codespace.)
 
+  redis:
+    image: redis
+    restart: unless-stopped
+
 volumes:
   postgres-data:

.env.sample

@@ -1,5 +1,6 @@
-DBNAME=<database name>
+DBNAME=<database-name>
 DBHOST=<database-hostname>
 DBUSER=<db-user-name>
 DBPASS=<db-password>
-SECRET_KEY=<secret key>
+CACHELOCATION=<redis-cache-url>
+SECRET_KEY=<secret-key>

.env.sample.devcontainer

@@ -2,4 +2,5 @@ DBNAME=app
 DBHOST=localhost
 DBUSER=app_user
 DBPASS=app_password
-SECRET_KEY=secret_key
+CACHELOCATION=redis://redis:6379/0
+SECRET_KEY=secret_key

.vscode/README.md

@@ -0,0 +1,3 @@
+# .vscode directory
+
+This `.vscode` directory contains configuration that lets you launch and debug in Visual Studio Code and isn't used by the sample application.

README.md

@@ -2,70 +2,61 @@
 
 This is a Python web app using the Django framework and the Azure Database for PostgreSQL relational database service. The Django app is hosted in a fully managed Azure App Service. This app is designed to be be run locally and then deployed to Azure. You can either deploy this project by following the tutorial [*Deploy a Python (Django or Flask) web app with PostgreSQL in Azure*](https://docs.microsoft.com/azure/app-service/tutorial-python-postgresql-app) or by using the [Azure Developer CLI (azd)](https://learn.microsoft.com/azure/developer/azure-developer-cli/overview) according to the instructions below.
 
+Additionally, the sample application demonstrates Azure Redis Cache access by caching the restaurant details page for 60 seconds. You can add the Azure Redis Cache integration in the [secure-by-default web app + database creation wizard](https://portal.azure.com/?feature.customportal=false#create/Microsoft.AppServiceWebAppDatabaseV3), and it's also included in the [AZD template](https://github.com/Azure-Samples/python-app-service-postgresql-infra).
+
 ## Requirements
 
-The [requirements.txt](./requirements.txt) has the following packages:
+The [requirements.txt](./requirements.txt) has the following packages, all used by a typical data-driven Django application:
 
 | Package | Description |
 | ------- | ----------- |
 | [Django](https://pypi.org/project/Django/) | Web application framework. |
 | [pyscopg2-binary](https://pypi.org/project/psycopg-binary/) | PostgreSQL database adapter for Python. |
 | [python-dotenv](https://pypi.org/project/python-dotenv/) | Read key-value pairs from .env file and set them as environment variables. In this sample app, those variables describe how to connect to the database locally. <br><br> This package is used in the [manage.py](./manage.py) file to load environment variables. |
 | [whitenoise](https://pypi.org/project/whitenoise/) | Static file serving for WSGI applications, used in the deployed app. <br><br> This package is used in the [azureproject/production.py](./azureproject/production.py) file, which configures production settings. |
+| [django-redis](https://pypi.org/project/django-redis/) | Redis cache backend for Django. |
 
-## Using this project with the Azure Developer CLI (azd)
+## Run the sample
 
-This project is designed to work well with the [Azure Developer CLI](https://learn.microsoft.com/azure/developer/azure-developer-cli/overview),
-which makes it easier to develop apps locally, deploy them to Azure, and monitor them.
+This project has a [dev container configuration](.devcontainer/), which makes it easier to develop apps locally, deploy them to Azure, and monitor them. The easiest way to run this sample application is inside a GitHub codespace. Follow these steps:
 
-### Local development
+1. Fork this repository to your account. For instructions, see [Fork a repo](https://docs.github.com/get-started/quickstart/fork-a-repo).
 
-This project has Dev Container support, so you can open it in Github Codespaces or local VS Code with the Dev Containers extension. If you're unable to open the Dev Container,
-then it's best to first [create a Python virtual environment](https://docs.python.org/3/tutorial/venv.html#creating-virtual-environments) and activate that.
+1. From the repository root of your fork, select **Code** > **Codespaces** > **+**.
 
-1. Install the requirements:
+1. In the codespace terminal, run the following commands:
 
     ```shell
+    # Install requirements
     python3 -m pip install -r requirements.txt
-    ```
-
-2. Create an `.env` file using `.env.sample` as a guide. Set the value of `DBNAME` to the name of an existing database in your local PostgreSQL instance. Set the values of `DBHOST`, `DBUSER`, and `DBPASS` as appropriate for your local PostgreSQL instance. If you're in the Dev Container, copy the values from `.env.sample.devcontainer`. 
-
-3. In the `.env` file, fill in a secret value for `SECRET_KEY`. You can use this command to generate an appropriate value:
-
-    ```shell
-    python -c 'import secrets; print(secrets.token_hex())'
-    ```
-
-4. Run the migrations: (or use VS Code "Run" button and select "Migrate")
-
-    ```shell
+    # Create .env with environment variables
+    cp .env.sample.devcontainer .env
+    # Run database migrations
     python3 manage.py migrate
-    ```
-
-5. Run the local server: (or use VS Code "Run" button and select "Run server")
-
-    ```shell
+    # Start the development server
     python3 manage.py runserver
     ```
 
-### Deployment
+1. When you see the message `Your application running on port 8000 is available.`, click **Open in Browser**.
 
-This repo is set up for deployment on Azure App Service (w/PostGreSQL server) using the configuration files in the `infra` folder.
+### Quick deploy
 
-🎥 Watch a deployment of the code in [this screencast](https://www.youtube.com/watch?v=JDlZ4TgPKYc).
+This project is designed to work well with the [Azure Developer CLI](https://learn.microsoft.com/azure/developer/azure-developer-cli/overview), which makes it easier to develop apps locally, deploy them to Azure, and monitor them. 
+
+🎥 Watch a deployment of the code in [this screencast](https://www
+.youtube.com/watch?v=JDlZ4TgPKYc).
 
 Steps for deployment:
 
 1. Sign up for a [free Azure account](https://azure.microsoft.com/free/)
-2. Install the [Azure Dev CLI](https://learn.microsoft.com/azure/developer/azure-developer-cli/install-azd). (If you opened this repository in a Dev Container, that part will be done for you.)
+2. Install the [Azure Dev CLI](https://learn.microsoft.com/azure/developer/azure-developer-cli/install-azd). (If you opened this repository in a Dev Container, it's already installed for you.)
 3. Initialize a new `azd` environment:
 
     ```shell
     azd init
     ```
 
-    It will prompt you to provide a name (like "django-app") that will later be used in the name of the deployed resources.
+    It will prompt you to provide a name (like "django-app"), which will later be used in the name of the deployed resources.
 
 4. Provision and deploy all the resources:
 
@@ -91,25 +82,6 @@ Steps for deployment:
     azd deploy
     ```
 
-### CI/CD pipeline
-
-This project includes a Github workflow for deploying the resources to Azure
-on every push. That workflow requires several Azure-related authentication secrets to be stored as Github action secrets. To set that up, run:
-
-```shell
-azd pipeline config
-```
-
-### Monitoring
-
-The deployed resources include a Log Analytics workspace with an Application Insights dashboard to measure metrics like server response time.
-
-To open that dashboard, just run:
-
-```shell
-azd monitor --overview
-```
-
 ## Getting help
 
 If you're working with this project and running into issues, please post in [Issues](/issues).

azure.yaml

@@ -1,10 +1,34 @@
 # yaml-language-server: $schema=https://raw.githubusercontent.com/Azure/azure-dev/main/schemas/v1.0/azure.yaml.json
+# azure.yaml is an azd configuration file and isn't used by the sample application. 
 
-name: django-postgresql-sample-app
+name: python-app-service-postgresql-redis-infra
 metadata:
-  template: django-postgresql-sample-app@0.0.1-beta
+  template: python-app-service-postgresql-redis-infra@0.0.1-beta
 services:
   web:
     project: .
     language: py
     host: appservice
+hooks:
+  postprovision:
+    posix: 
+      shell: sh
+      run: echo $'\n\nApp Service app has the following settings:\n' && echo "$WEB_APP_SETTINGS" | jq -r '.[]' | sed 's/\(.*\)/\t- \1/' && echo -e $"\nSee the settings in the portal:\033[1;36m $WEB_APP_CONFIG" 
+      interactive: true
+      continueOnError: true
+    windows:
+      shell: pwsh
+      run: Write-Host "`n`nApp Service app has the following settings:`n" $WEB_APP_SETTINGS | ConvertFrom-Json | ForEach-Object { Write-Host "\t- $_" }
+      interactive: true
+      continueOnError: true
+  postdeploy:
+    posix: 
+      shell: sh
+      run: echo -e $"\n\nOpen SSH session to App Service container at:\033[1;36m $WEB_APP_SSH\033[0m" && echo -e $"Stream App Service logs at:\033[1;36m $WEB_APP_LOG_STREAM"
+      interactive: true
+      continueOnError: true
+    windows:
+      shell: pwsh
+      run: Write-Host "`n`nOpen SSH session to App Service container at:`n" $WEB_APP_SSH; Write-Host "Stream App Service logs at:`n" $WEB_APP_LOG_STREAM
+      interactive: true
+      continueOnError: true

azureproject/production.py

@@ -22,6 +22,7 @@
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
 ]
 
+SESSION_ENGINE = "django.contrib.sessions.backends.cache"
 STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'
 STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles')
 
@@ -38,3 +39,14 @@
         'PASSWORD': conn_str_params['password'],
     }
 }
+
+CACHES = {
+        "default": {  
+            "BACKEND": "django_redis.cache.RedisCache",
+            "LOCATION": os.environ.get('AZURE_REDIS_CONNECTIONSTRING'),
+            "OPTIONS": {
+                "CLIENT_CLASS": "django_redis.client.DefaultClient",
+                "COMPRESSOR": "django_redis.compressors.zlib.ZlibCompressor",
+        },
+    }
+}

azureproject/settings.py

@@ -53,6 +53,7 @@
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
 ]
 
+SESSION_ENGINE = "django.contrib.sessions.backends.cache"
 ROOT_URLCONF = 'azureproject.urls'
 
 TEMPLATES = [
@@ -119,6 +120,15 @@
     },
 ]
 
+CACHES = {
+        "default": {  
+            "BACKEND": "django_redis.cache.RedisCache",
+            "LOCATION": os.environ.get('CACHELOCATION'),
+            "OPTIONS": {
+                "CLIENT_CLASS": "django_redis.client.DefaultClient",
+        },
+    }
+}
 
 # Internationalization
 # https://docs.djangoproject.com/en/4.0/topics/i18n/

infra/README.md

@@ -0,0 +1,3 @@
+# infra directory
+
+This `infra` directory contains azd files used for `azd provision` and isn't used by the sample application.

infra/main.bicep

@@ -42,3 +42,7 @@ module resources 'resources.bicep' = {
 output AZURE_LOCATION string = location
 output APPLICATIONINSIGHTS_CONNECTION_STRING string = resources.outputs.APPLICATIONINSIGHTS_CONNECTION_STRING
 output WEB_URI string = resources.outputs.WEB_URI
+output WEB_APP_SETTINGS array = resources.outputs.WEB_APP_SETTINGS
+output WEB_APP_LOG_STREAM string = resources.outputs.WEB_APP_LOG_STREAM
+output WEB_APP_SSH string = resources.outputs.WEB_APP_SSH
+output WEB_APP_CONFIG string = resources.outputs.WEB_APP_CONFIG