How can I update the App Service container registry settings programmatically

Question

I would like to programmatically change the container settings for an App Service resource using the Python SDK.

I can see how to update to use code from Github: https://learn.microsoft.com/en-us/azure/developer/python/sdk/examples/azure-sdk-example-web-app?tabs=cmd but not how to do the same thing using a container registry.

Is this possible through the SDK?

Answer 1

Hi MarkWelsh,

Thank you for reaching out to MS Q&A.

Yes, you can update the App Service container registry settings programmatically using the Azure SDK for Python.

Below is a Python script that configures an Azure App Service to use a container from Azure Container Registry (ACR):

import random

from azure.identity import DefaultAzureCredential

from azure.mgmt.resource import ResourceManagementClient

from azure.mgmt.web import WebSiteManagementClient

SUBSCRIPTION_ID = "SUBSCRIPTION_ID"

RESOURCE_GROUP_NAME = "RESOURCE_GROUP_NAME"

LOCATION = "centralus"

SERVICE_PLAN_NAME = "PythonAzureExample-WebApp-plan"

WEB_APP_NAME = f"PythonContainerApp-{random.randint(1000,9999)}"

ACR_SERVER = "ACRName.azurecr.io"

ACR_USERNAME = "ACRName"

ACR_PASSWORD = "ACR_PASSWORD"

CONTAINER_IMAGE = f"{ACR_SERVER}/flask-demo:v1"

credential = DefaultAzureCredential()

resource_client = ResourceManagementClient(credential, SUBSCRIPTION_ID)

app_service_client = WebSiteManagementClient(credential, SUBSCRIPTION_ID)

print("Creating/updating resource group...")

resource_client.resource_groups.create_or_update(RESOURCE_GROUP_NAME, {"location": LOCATION})

print("Creating/updating App Service Plan...")

app_service_client.app_service_plans.begin_create_or_update(

    RESOURCE_GROUP_NAME,

    SERVICE_PLAN_NAME,

    {

        "location": LOCATION,

        "reserved": True,  # Linux plan (required for containers)

        "sku": {"name": "B1", "tier": "Basic"}

    }

).result()

print(f"Creating/updating Web App: {WEB_APP_NAME}...")

web_app = app_service_client.web_apps.begin_create_or_update(

    RESOURCE_GROUP_NAME,

    WEB_APP_NAME,

    {

        "location": LOCATION,

        "server_farm_id": f"/subscriptions/{SUBSCRIPTION_ID}/resourceGroups/{RESOURCE_GROUP_NAME}/providers/Microsoft.Web/serverfarms/{SERVICE_PLAN_NAME}",

        "site_config": {

            "linux_fx_version": f"DOCKER|{CONTAINER_IMAGE}",

            "app_settings": [

                {"name": "DOCKER_REGISTRY_SERVER_URL", "value": f"https://{ACR_SERVER}"},

                {"name": "DOCKER_REGISTRY_SERVER_USERNAME", "value": ACR_USERNAME},

                {"name": "DOCKER_REGISTRY_SERVER_PASSWORD", "value": ACR_PASSWORD},

                {"name": "WEBSITES_PORT", "value": "80"},  # Set the exposed port if necessary

            ],

        },

    }

).result()

print(f"Web App {WEB_APP_NAME} deployed successfully!")

web_app_info = app_service_client.web_apps.get(RESOURCE_GROUP_NAME, WEB_APP_NAME)

print(f"Web App URL: https://{web_app_info.default_host_name}")

Steps to Use This Code:

Create a Container and Push It to ACR . Ensure your container image is built and pushed to ACR:

az acr login --name youracr

docker tag your-image:v1 youracr.azurecr.io/your-image:v1

docker push youracr.azurecr.io/your-image:v1

Alternatively, refer to this GitHub repository for managing Azure Container Registry using the Python SDK.

Run the above script and your App Service will be updated with the new container image.

Hope this helps.

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