I want to create function app using docker image.

Question

I have already created function app with flex consumption plan. I want to deploy the code using docker image. What is the right procedure?

Answer 1

To deploy your Azure Function App using a Docker image, follow these steps:

1. Update the Image: If you have made changes to your function code or need to update the base image, rebuild your Docker image locally. Use the following command to build your image:

      docker build --tag <DOCKER_ID>/<IMAGE_NAME>:v1.0.0 .
   

   Replace <DOCKER_ID> and <IMAGE_NAME> with your Docker Hub account ID and desired image name, respectively.
2. Push the Image to a Registry: After building the image, push it to your container registry (either Docker Hub or Azure Container Registry). For Docker Hub, use:

      docker push <DOCKER_ID>/<IMAGE_NAME>:v1.0.0
   

   For Azure Container Registry, use:

      az acr build --registry <REGISTRY_NAME> --image <LOGIN_SERVER>/azurefunctionsimage:v1.0.1 .
   

   Replace <REGISTRY_NAME> and <LOGIN_SERVER> with your Azure Container Registry details.
3. Update the Function App Configuration: Use the Azure CLI or Azure portal to update your function app to use the new Docker image. The command for Azure CLI is:

      az functionapp config container set --image <IMAGE_NAME> --registry-password <SECURE_PASSWORD> --registry-username <USER_NAME> --name <APP_NAME> --resource-group <RESOURCE_GROUP>
   

   Replace <IMAGE_NAME>, <SECURE_PASSWORD>, <USER_NAME>, <APP_NAME>, and <RESOURCE_GROUP> with your specific details.
4. Verify Deployment: After updating the configuration, verify that your function app is running the new Docker image. You can check the Azure portal for the status of your function app.

By following these steps, you should be able to successfully deploy your function app using a Docker image.

Answer 2

Hi Gaurav,

Thanks for reaching out to Microsoft Q&A.

Steps to deploy your code using a Docker image:

1. Create a Docker Image:

First, ensure you have a Dockerfile in your local project. You can build your Docker image using the following command:

docker build --tag <DOCKER_ID>/<IMAGE_NAME>:v1.0.0 .

Replace <DOCKER_ID> and <IMAGE_NAME> with your Docker Hub account ID and the desired image name.

2. Push to Container Registry:

After building your Docker image, push it to a container registry. If you're using Azure Container Registry, you can use:

az acr build --registry <REGISTRY_NAME> --image <LOGIN_SERVER>/azurefunctionsimage:v1.0.1 .

For Docker Hub, you can use:

docker push <DOCKER_ID>/azurefunctionsimage:v1.0.1

3. Update Function App to Use the New Image:

You can set your Function App to use the new Docker image either through the Azure CLI or in the Azure portal. Using the Azure CLI, the command looks like this:

az functionapp config container set --image <IMAGE_NAME> --registry-password <SECURE_PASSWORD> --registry-username <USER_NAME> --name <APP_NAME> --resource-group <RESOURCE_GROUP>

4. Deploy via Azure Portal:

If you prefer the Azure portal:

• Go to your Function App.
• Select Deployment Center.
• Choose your container registry and specify your image.

5. Monitor & Manage:

After deployment, keep an eye on your function app's performance and logs to ensure everything is running smoothly.

References:

• Deploy a Function App Container
• Create a function on Linux using a custom container
• Work with containers and Azure Functions

Hope it helps!

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