20-getting-started-docker.md

Docker - Azure Container Instance (ACI)

Azure container registry

Again as a first step, create a registry (private) for your docker application. From here you will be able to pull your application images and create a working containers.

Here is a simple command to create an Azure container registry: az acr create --resource-group <resourceGroupName> --name <acrName> --sku Basic

After registry creation is done, you can log into your registry with a Azure CLI: az acr login --name <acrName>

Try to get a list of all your images: az acr repository list --name <acrName> --output table Nothing there, are you surprised?

Create a simple application

Open your VisualStudio, start new .net core project and select WebApi with Docker support enabled. Build your newly created app and try to debug it!

Yay, it works!

Create an image from a source code

Navigate to the solution directory. Build your docker image with a command: docker build -f <dockerProjectDirectory>\Dockerfile -t "<dockerImageName>:latest" .

Publish an application into a registry

Before you can push an image to the registry, you have to tag it with a registry name. Type a following command: docker tag <dockerImageName>:latest <acrName>.azurecr.io/<dockerImageName>:latest Then you are able to push you application image to your own registry, follow this command:docker push <acrName>.azurecr.io/<dockerImageName>:latest

Create an Azure container instance

First of all you have to enable admin access to a container registry, with the following command: az acr update -n <acrName> --admin-enabled true Then you have to get a password for an admin access: az acr credential show --name <acrName> --query "passwords[0].value" Now you have all informations that you need to start you first container instance, but now a command will be a little bit long: az container create --resource-group <resourceGroupName> --name <aciName> --image <acrName>.azurecr.io/<dockerImageName>:latest --registry-username <acrName> --registry-password <acrPassword> --dns-name-label <aciDnsName> --ports 80 Navigate from your browser to the:http://<aciDnsName>.westeurope.azurecontainer.io/api/helloworld and voila`.

Cleanup

If you want to continue with Kubernetes demo, skip this step and go directly to the next document.

If you want to free your resource and maybe more important reduce costs, you have to remove all components that you created during this demo. Be brave it can take a while. It is possible by this command: az group delete --name <resourceGroupName> --yes

Extras

After made all steps from this specific demo file, I leave my Azure Subscription for a day (Azure costs are calculated daily). Next day, I checked bill and I was surprised, because this whole play cost me exatcly 3 ¢ (euro cents) :)

Navigation:

0. Readme
1. Prerequisites
2. Docker
3. Kubernetes
4. Commands