Deploy docker image to Azure Kubernetes Service

In this tutorial, we will learn how to deploy container image into Kubernetes cluster using Azure Kubernetes Service. I am assuming that you have already pushed an image into your Azure container registry.

You may refer the below articles for Docker image & Azure container registry.

• Create Container image


• Push container image to Azure container registry

NOTE: We will use Azure CLI hence install Azure CLI version 2.0.29 or later. Run az –version to find the version.

1. Select your subscription. Replace <<subscription ID>> with your subscription id.

az account set --s <<subscription ID>>

     2. If you have an existing resource group, you can skip this step else you can create a new resource group.

az group create --name <<resource group name>> --location <<location>>

Example:

az group create --name helloworldRG --location westeurope

3. Create Azure Kubernetes Service.

az aks create --resource-group <<resource group name>> --name <<aks name>> --node-count <<number of node>> --enable-addons monitoring --generate-ssh-keys --node-resource-group <<node resource group>>

Example:

az aks create --resource-group helloworldRG --name helloworldAKS2809 --node-count 1 --enable-addons monitoring --generate-ssh-keys --node-resource-group helloworldNodeRG

While creating an AKS cluster, one more resource group is also created to store AKS resource. For more details, refer Why are two resource groups created with AKS?

4. Connect to AKS cluster

az aks get-credentials --resource-group <<resource group name>>  --name <<aks name>>

Example:

az aks get-credentials --name "helloworldAKS2809" --resource-group "helloworldRG"

To verify your connection, run the below command to get nodes.

kubectl get nodes

5. Integrate AKS with ACR.

az aks update -n myAKSCluster -g myResourceGroup --attach-acr <acrName>

Example

az aks update -n helloworldAKS2809 -g helloworldRG --attach-acr helloworldACR1809

6. Deploy image to AKS.

Create a file hellowordapp.yaml and copy the below content in the file.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: helloworldapp
  labels:
    app: helloworldapp
spec:
  replicas: 3
  selector:
    matchLabels:
      app: helloworldapp
  template:
    metadata:
      labels:
        app: helloworldapp
    spec:
      containers:
      - name: hellositecore2705
        image: helloworldacr1809.azurecr.io/helloworldapp:latest
        ports:
        - containerPort: 8080
apiVersion: v1
kind: Service
metadata:
  name: helloworldapp
spec:
  selector:
    app: helloworldapp
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
spec:
  type: LoadBalancer
  ports:
  - port: 80
  selector:
    app: helloworldapp

You can refer Yaml validator to check your yaml file.

It’s time to deploy our docker image from ACS to AKS.

kubectl apply -f <<yaml file>>

Example:

kubectl apply -f hellowordapp.yaml

To get the external IP run the command.

kubectl get service helloworldapp

Open the web Brower and navigate to your external IP. The web page will be opened as shown below:

I hope this information helped you. If you have any feedback, questions or suggestions for improvement please let me know in the comments section.