Highlights
- This is a bonus section added in 6 months after the course release
- RECOMMENDED APPROACH - First Learn with GCP and then come here!
- 99% of things with Kubernetes remain the same in AWS, GCP and Azure.
- ISTIO and HELM would be the same in all clouds. So, we will not be worry about them here!
- Download Github repo again!
Prerequisites
- Install and Configure AWS CLI
aws configure - Install EKSCTL - https://eksctl.io/introduction/installation/
eksctl version - EKS is not free. t2.medium is not in the free tier!
Help for eksctl https://eksctl.io/
eksctl create cluster --name in28minutes-cluster --nodegroup-name in28minutes-cluster-node-group --node-type t2.medium --nodes 3 --nodes-min 3 --nodes-max 7 --managed --asg-access
If you get this error
AWS::EKS::Cluster/ControlPlane: CREATE_FAILED – "Cannot create cluster
'in28minutes-dev-cluster' because us-east-1e, the targeted availability zone, does not
currently have sufficient capacity to support the cluster. Retry and choose from these
availability zones: us-east-1a, us-east-1b, us-east-1c, us-east-1d, us-east-1f (Service:
AmazonEKS; Status Code: 400; Error Code: UnsupportedAvailabilityZoneException; Request
ID: a5580928-689d-4558-b3bd-2573131ec69e)
Add Availability Zones
--zones=us-east-1a,us-east-1b
Things to Note
- VPCs and SubNets are Created
kubectl create deployment hello-world-rest-api --image=in28min/hello-world-rest-api:0.0.1.RELEASE
kubectl expose deployment hello-world-rest-api --type=LoadBalancer --port=8080
kubectl create deployment todowebapp-h2 --image=in28min/todo-web-application-h2:0.0.1-SNAPSHOT
kubectl expose deployment todowebapp-h2 --type=LoadBalancer --port=8080
cd /Ranga/git/01.udemy-course-repos/kubernetes-crash-course/03-todo-web-application-mysql/backup/02-final-backup-at-end-of-course
kubectl apply -f mysql-database-data-volume-persistentvolumeclaim-aws.yaml,mysql-deployment.yaml,mysql-service.yaml
kubectl apply -f config-map.yaml,secret.yaml,todo-web-application-deployment.yaml,todo-web-application-service.yaml
echo -n dummytodos | base64
kubectl delete all -l app=hello-world-rest-api
kubectl delete all -l app=todowebapp-h2
kubectl delete all -l io.kompose.service=todo-web-application
kubectl delete all -l io.kompose.service=mysql
kubectl apply -f 04-currency-exchange-microservice-basic/deployment.yaml
kubectl apply -f 05-currency-conversion-microservice-basic/deployment.yaml
- https://docs.aws.amazon.com/eks/latest/userguide/alb-ingress.html
- Check out sample application - https://raw.githubusercontent.com/kubernetes-sigs/aws-alb-ingress-controller/v1.1.4/docs/examples/2048/2048-ingress.yaml
kubectl apply -f 05-currency-conversion-microservice-basic/ingress_aws.yaml
- https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Container-Insights-setup-EKS-quickstart.html
- Attach CloudWatchAgentServerPolicy to the nodes
Testing auto scaler
kubectl create deployment autoscaler-demo --image=nginx
kubectl scale deployment autoscaler-demo --replicas=50
https://docs.aws.amazon.com/eks/latest/userguide/delete-cluster.html
Delete all LoadBalancer services
kubectl get svc --all-namespaces
kubectl delete svc service-name
Delete the cluster
eksctl delete cluster --name in28minutes-cluster
Let's use Azure Cloud Shell
# az login # az cli
az group create --name kubernetes-resource-group --location westeurope
az ad sp create-for-rbac --skip-assignment --name kubernetes-cluster-service-principal
az aks create --name in28minutes-cluster --node-count 4 --enable-addons monitoring --resource-group kubernetes-resource-group --vm-set-type VirtualMachineScaleSets --load-balancer-sku standard --enable-cluster-autoscaler --min-count 1 --max-count 7 --generate-ssh-keys --service-principal <<appId>> --client-secret <<password>>
az aks get-credentials --resource-group kubernetes-resource-group --name in28minutes-cluster
kubectl create deployment hello-world-rest-api --image=in28min/hello-world-rest-api:0.0.1.RELEASE
kubectl expose deployment hello-world-rest-api --type=LoadBalancer --port=8080
kubectl create deployment todowebapp-h2 --image=in28min/todo-web-application-h2:0.0.1-SNAPSHOT
kubectl expose deployment todowebapp-h2 --type=LoadBalancer --port=8080
cd kubernetes-crash-course/03-todo-web-application-mysql/backup/02-final-backup-at-end-of-course
kubectl apply -f mysql-database-data-volume-persistentvolumeclaim.yaml,mysql-deployment.yaml,mysql-service.yaml
#WAIT FOR MYSQL TO BE UP AND RUNNING
kubectl apply -f config-map.yaml,secret.yaml,todo-web-application-deployment.yaml,todo-web-application-service.yaml
kubectl delete all -l app=hello-world-rest-api
kubectl delete all -l app=todowebapp-h2
kubectl delete all -l io.kompose.service=todo-web-application
kubectl delete all -l io.kompose.service=mysql
kubectl apply -f 04-currency-exchange-microservice-basic/deployment.yaml
kubectl apply -f 05-currency-conversion-microservice-basic/deployment.yaml
# watch -n 0.1 curl
# Explore Logs
Install Ingress Controller
helm repo add stable https://kubernetes-charts.storage.googleapis.com/
helm install stable/nginx-ingress --namespace default --set controller.replicaCount=1 --set controller.nodeSelector."beta\.kubernetes\.io/os"=linux --set defaultBackend.nodeSelector."beta\.kubernetes\.io/os"=linux --generate-name
kubectl get service -l app=nginx-ingress
More details - https://docs.microsoft.com/en-us/azure/aks/ingress-tls
Setup Ingress
kubectl apply -f 05-currency-conversion-microservice-basic/ingress_azure.yaml
Testing auto scaler
kubectl create deployment autoscaler-demo --image=nginx
kubectl scale deployment autoscaler-demo --replicas=5000
Delete all LoadBalancer services
kubectl get svc --all-namespaces
kubectl delete svc service-name
Delete the cluster
az aks delete --name in28minutes-cluster --resource-group kubernetes-resource-group