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Kubernetes Deployment in Azure AKS (Azure Kubernetes Service)

Pre-requisites

  • Azure AKS Cluster is required to be up and running for this deployment. In case, you need to create new AKS Cluster, please refer this link.

  • Azure CLI is to be installed. For installing, please refer this link.

Steps

Here are the high level steps which are followed by Azure CLI Commands.

  • Connect to Azure AKS Cluster.

  • Enable the Ingress Controller in the Cluster.

  • Update the Ingress YAML file.

  • Execute/Apply the YAML files and test the application.

#Connect to Azure from CLI (either local machine or VM)
az login

#Set the Azure Subscription in which Kubernetes Cluster presents
az account set --subscription <mySubscription>

#Connect to AKS Cluster
az aks get-credentials --resource-group <myResourceGroup> --name <myAKSCluster>
#Sample Command for Reference
az aks get-credentials --resource-group DefaultResourceGroup-WEU --name devon-aks

#Enable http_application_routing in AKS
az aks enable-addons --resource-group <myResourceGroup> --name <myAKSCluster> --addons http_application_routing
#Sample Command for Reference
az aks enable-addons --resource-group DefaultResourceGroup-WEU --name devon-aks --addons http_application_routing

#Incase, you want to Disable http_application_routing in AKS, here is the command
az aks disable-addons --resource-group <myResourceGroup> --name <myAKSCluster> --addons http_application_routing

#Get the DomainName to be used in Ingress YAML Files
az aks show --resource-group <myResourceGroup> --name <myAKSCluster> --query addonProfiles.httpApplicationRouting.config.HTTPApplicationRoutingZoneName -o table
#Sample Command for Reference
az aks show --resource-group DefaultResourceGroup-WEU --name devon-aks --query addonProfiles.httpApplicationRouting.config.HTTPApplicationRoutingZoneName -o table

  • Update the Ingress YAML File present in the k8s folder with the DomainName came as the output of the above command

...
spec:
  tls:
    - hosts:
        - 100001xx11x11xxx1xxx.westeurope.aksapp.io
  rules:
    - host: 100001xx11x11xxx1xxx.westeurope.aksapp.io
...
#Get the External-IP Address of the Nginx Ingress Controller
kubectl get svc --all-namespaces

Sample Output

NAMESPACE     NAME                                           TYPE           CLUSTER-IP     EXTERNAL-IP      PORT(S)                      AGE
default       kubernetes                                     ClusterIP      10.0.0.1       <none>           443/TCP                      4d4h
default       mts-backend                                    ClusterIP      10.0.29.221    <none>           8081/TCP                     4d4h
default       mts-frontend                                   ClusterIP      10.0.155.233   <none>           80/TCP                       4d4h
kube-system   addon-http-application-routing-nginx-ingress   LoadBalancer   10.0.151.104   20.103.114.206   80:30679/TCP,443:32259/TCP   4d4h
kube-system   healthmodel-replicaset-service                 ClusterIP      10.0.214.184   <none>           25227/TCP                    4d4h
kube-system   kube-dns                                       ClusterIP      10.0.0.10      <none>           53/UDP,53/TCP                4d4h
kube-system   metrics-server                                 ClusterIP      10.0.120.228   <none>           443/TCP                      4d4h
#Map the DomainName with the External-IP Address
az network dns record-set a add-record \
    --resource-group <myResourceGroup> \
    --zone-name <myCustomDomain> \
    --record-set-name "*" \
    --ipv4-address <myExternalIP>
#Sample Command for Reference
az network dns record-set a add-record \
    --resource-group mc_defaultresourcegroup-weu_devon-aks_westeurope \
    --zone-name 100001xx11x11xxx1xxx.westeurope.aksapp.io \
    --record-set-name "*" \
    --ipv4-address 20.103.114.206
#Execute the Kubernetes YAML Files
kubectl apply -f ./

#Check the status of the Deployments, Services, Pods
kubectl get all