Ingress - Basics¶

Link to all the Kubernetes Manifests ¶

Step-01: Introduction¶

Ingress Basic Architecture¶

Azure Kubernetes Service with Azure DevOps and Terraform¶

What are we going to learn?¶

We are going to create a Static Public IP for Ingress in Azure AKS
Associate that Public IP to Ingress Controller during installation.
We are going to create a namespace ingress-basic for Ingress Controller where all ingress controller related things will be placed.
In future, we install cert-manager for SSL certificates also in same namespace.
Caution Note: This namespace is for Ingress controller stuff, ingress resource we can create in any other namespaces and not an issue. Only condition is create ingress resource and ingress pointed application in same namespace (Example: App1 and Ingress resource of App1 should be in same namespace)
Create / Review Ingress Manifest
Deploy a simple Nginx App1 with Ingress manifest and test it
Clean-Up or delete application after testing

Step-02: Create Static Public IP¶

# Get the resource group name of the AKS cluster 
az aks show --resource-group aks-rg1 --name aksdemo1 --query nodeResourceGroup -o tsv

# TEMPLATE - Create a public IP address with the static allocation
az network public-ip create --resource-group <REPLACE-OUTPUT-RG-FROM-PREVIOUS-COMMAND> --name myAKSPublicIPForIngress --sku Standard --allocation-method static --query publicIp.ipAddress -o tsv

# REPLACE - Create Public IP: Replace Resource Group value
az network public-ip create --resource-group MC_aks-rg1_aksdemo1_centralus --name myAKSPublicIPForIngress --sku Standard --allocation-method static --query publicIp.ipAddress -o tsv

- Make a note of Static IP which we will use in next step when installing Ingress Controller

# Make a note of Public IP created for Ingress
52.154.156.139

Step-03: Install Ingress Controller¶

# Install Helm3 (if not installed)
brew install helm

# Create a namespace for your ingress resources
kubectl create namespace ingress-basic

# Add the official stable repository
helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
helm repo add stable https://kubernetes-charts.storage.googleapis.com/
helm repo update

#  Customizing the Chart Before Installing. 
helm show values ingress-nginx/ingress-nginx

# Use Helm to deploy an NGINX ingress controller
helm install ingress-nginx ingress-nginx/ingress-nginx \
    --namespace ingress-basic \
    --set controller.replicaCount=2 \
    --set controller.nodeSelector."beta\.kubernetes\.io/os"=linux \
    --set defaultBackend.nodeSelector."beta\.kubernetes\.io/os"=linux \
    --set controller.service.externalTrafficPolicy=Local \
    --set controller.service.loadBalancerIP="REPLACE_STATIC_IP" 

# Replace Static IP captured in Step-02
helm install ingress-nginx ingress-nginx/ingress-nginx \
    --namespace ingress-basic \
    --set controller.replicaCount=2 \
    --set controller.nodeSelector."beta\.kubernetes\.io/os"=linux \
    --set defaultBackend.nodeSelector."beta\.kubernetes\.io/os"=linux \
    --set controller.service.externalTrafficPolicy=Local \
    --set controller.service.loadBalancerIP="52.154.156.139" 


# List Services with labels
kubectl get service -l app.kubernetes.io/name=ingress-nginx --namespace ingress-basic

# List Pods
kubectl get pods -n ingress-basic
kubectl get all -n ingress-basic


# Access Public IP
http://<Public-IP-created-for-Ingress>

# Output should be
404 Not Found from Nginx

# Verify Load Balancer on Azure Mgmt Console
Primarily refer Settings -> Frontend IP Configuration

Step-04: Review Application k8s manifests¶

01-NginxApp1-Deployment.yml
02-NginxApp1-ClusterIP-Service.yml
03-Ingress-Basic.yml

Step-05: Deploy Application k8s manifests and verify¶

# Deploy
kubectl apply -f kube-manifests/

# List Pods
kubectl get pods

# List Services
kubectl get svc

# List Ingress
kubectl get ingress

# Access Application
http://<Public-IP-created-for-Ingress>/app1/index.html
http://<Public-IP-created-for-Ingress>

# Verify Ingress Controller Logs
kubectl get pods -n ingress-basic
kubectl logs -f <pod-name> -n ingress-basic

Step-06: Clean-Up Apps¶

# Delete Apps
kubectl delete -f kube-manifests/

Ingress Annotation Reference¶

https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/annotations/

Other References¶

https://github.com/kubernetes/ingress-nginx
https://github.com/kubernetes/ingress-nginx/blob/master/charts/ingress-nginx/values.yaml
https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v0.34.1/deploy/static/provider/cloud/deploy.yaml
https://kubernetes.github.io/ingress-nginx/deploy/#azure
https://helm.sh/docs/intro/install/
https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.19/#ingress-v1-networking-k8s-io

Important Note¶

Ingress Admission Webhooks
With nginx-ingress-controller version 0.25+, the nginx ingress controller pod exposes an endpoint that will integrate with the validatingwebhookconfiguration Kubernetes feature to prevent bad ingress from being added to the cluster. This feature is enabled by default since 0.31.0.

Ingress - Basics¶

Link to all the Kubernetes Manifests ¶

Step-01: Introduction¶

Ingress Basic Architecture¶

Azure Kubernetes Service with Azure DevOps and Terraform¶

What are we going to learn?¶

Step-02: Create Static Public IP¶

Step-03: Install Ingress Controller¶

Step-04: Review Application k8s manifests¶

Step-05: Deploy Application k8s manifests and verify¶

Step-06: Clean-Up Apps¶

Ingress Annotation Reference¶

Other References¶

Important Note¶

Best Selling Azure Kubernetes Service Course on Udemy ¶

Best Selling AWS EKS Kubernetes Course on Udemy ¶

HashiCorp Certified Terraform Associate - 50 Practical Demos ¶

Ingress - Basics¶

Link to all the Kubernetes Manifests¶

Step-01: Introduction¶

Ingress Basic Architecture¶

Azure Kubernetes Service with Azure DevOps and Terraform¶

What are we going to learn?¶

Step-02: Create Static Public IP¶

Step-03: Install Ingress Controller¶

Step-04: Review Application k8s manifests¶

Step-05: Deploy Application k8s manifests and verify¶

Step-06: Clean-Up Apps¶

Ingress Annotation Reference¶

Other References¶

Important Note¶

Best Selling Azure Kubernetes Service Course on Udemy¶

Best Selling AWS EKS Kubernetes Course on Udemy¶

HashiCorp Certified Terraform Associate - 50 Practical Demos¶

Link to all the Kubernetes Manifests ¶

Best Selling Azure Kubernetes Service Course on Udemy ¶

Best Selling AWS EKS Kubernetes Course on Udemy ¶

HashiCorp Certified Terraform Associate - 50 Practical Demos ¶