Minikube 1

minikube start --driver=docker

minikube status

• To connect, know the IP and SSH

minikube ip

ssh docker@<ip> 

• user=docker
• password=tcuser

minikube ssh

Once connected:

docker ps

From k8s_:

• k8s_kube-proxy_kube-proxy-bvjpp_kube-system
• k8s_kube-apiserver_kube-apiserver-minikube_kube-system
• k8s_kube-controller-manager_kube-controller-manager-minikube_kube-system
• k8s_kube-scheduler_kube-scheduler-minikube_kube-system
• k8s_coredns_coredns-565d847f94-gptzm_kube-system
• k8s_storage-provisioner_storage-provisioner_kube-system
• k8s_etcd_etcd-minikube_kube-system

From k8s_POD:

• k8s_POD_kube-proxy-bvjpp_kube-system
• k8s_POD_mypod_default
• k8s_POD_storage-provisioner_kube-system
• k8s_POD_coredns
• k8s_POD_etcd-minikube_kube-system
• k8s_POD_kube-scheduler-minikube_kube-system
• k8s_POD_kube-apiserver-minikube_kube-system
• k8s_POD_kube-controller-manager-minikube_kube-system

• No kubectl inside the node:

• exit and:

kubectl cluster-info

• list nodes in the cluster

kubectl get nodes

• List pods available in this cluster (default looks at default namespace only!)

kubectl get nodes

kubectl get namespaces

• Check pods from kube-system namespace (master node):

kubectl get pods --namespace=kube-system

• Create nginx pod

kubectl run <podname> --image=nginx

• Check container is running

• Get details about the pod

kubectl describe pod <podname>

• Connect to node again

kubectl ssh

docker ps | grep nginx

It create a paused container k8s_POD for the specific pod (to lock and keep namespace of specific pod)

• Connect to the container running nginx

docker exec -it <containerID> sh

hostname

hostname -i

• Check nginx is up and running

curl 172.17.0.4

• Exit both the container and the K8s node

• Check the pod IP address (same as container IP) – If several containers in pod -> they share the same IP address

kubectl get pods -o wide

• Delete the pod

kubectl delete pod <podname>

• you can use alias to shortcut command

alias k="kubectl"