Completek8s Classroom notes 07/Oct/2023

Annotations for controlling load balancers in Azure

• Refer Here for the list of the annoations while using service of type load balancer

Deploying Azure Application Gateway Ingress Controller

• Refer Here for creating an aks cluster with azure application gateway
• Create an aks cluster with network plugin azure, enable addon ingress-appgw

az aks create -n myCluster -g myResourceGroup --network-plugin azure --enable-managed-identity -a ingress-appgw --appgw-name myApplicationGateway --appgw-subnet-cidr "10.225.0.0/16" --generate-ssh-keys

• Now Get the application gateway id and subnet id

# Get application gateway id from AKS addon profile
appGatewayId=$(az aks show -n myCluster -g myResourceGroup -o tsv --query "addonProfiles.ingressApplicationGateway.config.effectiveApplicationGatewayId")

# Get Application Gateway subnet id
appGatewaySubnetId=$(az network application-gateway show --ids $appGatewayId -o tsv --query "gatewayIPConfigurations[0].subnet.id")

# Get AGIC addon identity
agicAddonIdentity=$(az aks show -n myCluster -g myResourceGroup -o tsv --query "addonProfiles.ingressApplicationGateway.identity.clientId")

# Assign network contributor role to AGIC addon identity to subnet that contains the Application Gateway
az role assignment create --assignee $agicAddonIdentity --scope $appGatewaySubnetId --role "Network Contributor"

* Now deploy the simple ingress using the below yaml

apiVersion: v1
kind: Pod
metadata:
  name: aspnetapp
  labels:
    app: aspnetapp
spec:
  containers:
  - image: nginx
    name: aspnetapp-image
    ports:
    - containerPort: 80
      protocol: TCP

---

apiVersion: v1
kind: Service
metadata:
  name: aspnetapp
spec:
  selector:
    app: aspnetapp
  ports:
  - protocol: TCP
    port: 80
    targetPort: 80

---

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: aspnetapp
  annotations:
    kubernetes.io/ingress.class: azure/application-gateway
spec:
  rules:
  - http:
      paths:
      - path: /
        backend:
          service:
            name: aspnetapp
            port:
              number: 80
        pathType: Exact

• Now get ingress
  
  
• Exercise: Refer Here for integrating azure key vault with aks.