Hello world Kubernetes (Azure - AKS)

Prerequisites

• install Azure CLI https://learn.microsoft.com/en-us/cli/azure/install-azure-cli-windows
• install Terraform https://developer.hashicorp.com/terraform/downloads
• install kubectl https://kubernetes.io/releases/download/#kubectl
• install Helm https://helm.sh/docs/helm/helm_install/

Create kubernetes on Azure (some resources required a paid plan or the starting credits when registering a new account)

1. If you dont have a subscription register, create a free account
2. az login (copy the id and use in the next command as the subscription id)
3. az account set --subscription "<subscription_id_or_subscription_name>"
4. go into the aks-terraform folder
5. terraform apply
6. when you finished using the cluster you should destroy it with terraform destroy

Install hello world application on the cluster

1. az aks get-credentials --resource-group aks-hello-world --name aks-hello-world (get credentials)
2. test connection to the cluster, kubectl get nodes it should return 1 node
3. helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
4. helm install ingress-nginx ingress-nginx/ingress-nginx --create-namespace --namespace hello-world --set controller.service.annotations."service\.beta\.kubernetes\.io/azure-load-balancer-health-probe-request-path"=/healthz (install ingress controller)
5. go into the app folder
6. kubectl apply -f hello-world.yaml --namespace hello-world (add hello world application)
7. kubectl apply -f ingress.yaml --namespace hello-world (add hello world application ingress)
8. get the external ip address of the cluster kubectl --namespace hello-world get services -o wide -w ingress-nginx-controller
9. test the application by visiting the ip address

https://learn.microsoft.com/en-us/azure/developer/terraform/create-k8s-cluster-with-tf-and-aks https://learn.microsoft.com/en-us/azure/aks/ingress-basic

Hello world Kubernetes (minikube)

1. dowload/install minikube https://minikube.sigs.k8s.io/docs/start/ (you can find useful commands as well)
2. minikube start
3. kubectl apply -f hello-world.yaml --namespace hello-world (add hello world application)
4. we can skip the ingress and forward the port kubectl port-forward service/hello-world 7080:80 -n hello-world
5. you can test the app at http://localhost:7080/