Resources

• https://docs.microsoft.com/en-us/azure/aks/
• https://docs.microsoft.com/en-us/azure/aks/tutorial-kubernetes-prepare-app
• https://azure.microsoft.com/en-us/resources/get-started-with-kubernetes-on-azure
• https://www.linkedin.com/learning/topics/kubernetes

Azure Cloud Shell

Start Azure Cloud Shell

Clone this repo

git clone https://github.com/shurikk/quick-aks.git
cd quick-aks

Create resource group

az group create -l eastus -n rg-handsonaks

Create AKS cluster

az aks create -n handsonaks -g rg-handsonaks -a http_application_routing --load-balancer-sku Standard -c 2 -l eastus --generate-ssh-keys

NOTE: this step might take a few minutes

Get cluster credentials

az aks get-credentials -n handsonaks -g rg-handsonaks

Explore AKS cluster

List of cluster nodes

kubectl get nodes -o wide

List of namespaces

kubectl get namespaces -o wide

List of pods running in kube-system namespace

kubectl get pods -n kube-system

List of different things in all namespaces

kubectl  get svc,deploy,ds,rs,pods --all-namespaces -o wide

Basic echo service

Deploy

0-deployment.yml
kubectl apply -f 0-deployment.yml

Inspect

kubectl get deploy -o wide
kubectl get deploy -o yaml
kubectl get pods -o wide

Create service

cat 1-service.yml
kubectl apply -f 1-service.yml

Inspect

kubectl get svc -o wide

Create ingress, expose service publically

cat 2-ingress.yml
kubectl apply -f 2-ingress.yml
watch kubectl get ingress -o wide

Use the IP address and access the service using your web browser or curl, e.g.

export IP=$(kubectl get ingress/echo -o jsonpath="{.status.loadBalancer.ingress[*].ip}")
export URL=http://$IP/echo
echo $IP
echo $URL
curl $URL/i/am/echoed

NOTE: also try opening URL using your browser

Scale up and down

kubectl scale --replicas 5 deploy/echo
for i in $(seq 10); do curl -s $URL/hi/there/$i | grep -a2 "Request served"; done
kubectl scale --replicas 1 deploy/echo

Delete echo application

kubectl delete -f 0-deployment.yml,1-service.yml,2-ingress.yml
kubectl get deploy,svc,ing

and to bring it back to how it was

kubectl apply -f 0-deployment.yml,1-service.yml,2-ingress.yml
kubectl get deploy,svc,ing

Demo vote application

kubectl apply -f 4-azure-vote-all-in-one.yml
watch kubectl get pods
kubectl get svc -o wide

Get azure-vote-front service external IP address and open in your web browser, amd watch pods logs

kubectl logs -l app=azure-vote-front -f

Enter the pod

kubectl exec -it $(kubectl get pod -o name -l app=azure-vote-front) -- bash
ps auxw

Delete vote application

kubectl delete -f 4-azure-vote-all-in-one.yml

Cleanup

Delete resource group, everything will be gone

az group delete -n rg-handsonaks --no-wait --yes