Kubernetes Training

1. Minikube and kubectl preparation

Set hyperkit as default driver and start minikube

minikube config set driver hyperkit
minikube start

Setup context

kubectx minikube

Create namespace

kubectl create -f namespace.yaml

Setup default namespace

kubectl config set-context --current --namespace nginx-namespace

2. Use local docker image

Set docker env

eval $(minikube docker-env)

Build image

docker build --no-cache -t ubuntu:local .

Testrun in minikube

kubectl run ubuntu-local --image=ubuntu:local --image-pull-policy=Never sleep 100
kubectl get pods
kubectl exec -ti ubuntu-local -- bash
kubectl delete pods ubuntu-local

3. Pod with nodeport service and ubuntu sidecar

Create pod and service and check endpoint

kubectl create -f pod.yaml
kubectl create -f service.yaml
kubectl describe endpoints nginx-service

Test service and pod with sidecar

kubectl exec -ti nginx-pod -c ubuntu-container -- bash
ifconfig
nslookup nginx-service
curl localhost

Test service from different pod

kubectl run -ti --rm ubuntu-local --image=ubuntu:local -- bash
curl nginx-service

Test nodeport from vm

minikube ssh
ifconfig
curl localhost:30973

4. Replicaset with nodeport service

Create replicaset and service and check endpoints

kubectl create -f replicaset.yaml
kubectl create -f replicaset-service.yaml
kubectl describe endpoints nginx-replicaset-service