Kubernettes Class

To Create a Cluster

On Both Master and Slave
install.sh

root@ip-172-31-25-124:~# vi /etc/docker/daemon.json
{
    "exec-opts": ["native.cgroupdriver=systemd"]
}

systemctl daemon-reload && systemctl restart docker && systemctl restart kubelet
kubeadm reset

On Master
Init Kubeadm :
kubeadm init 
export KUBECONFIG=/etc/kubernetes/admin.conf
kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"
kubeadm token create --print-join-command

On Worker :
Command output of token join

After sometime, try:
kubectl get nodes

kubectl get pods -n kube-system

apiVersion: apps/v1

kind: Deployment

metadata:

name: nginx-deployment

spec:

selector:

matchLabels:

  app: nginx

replicas: 2 # tells deployment to run 2 pods matching the template

template:

metadata:

  labels:

    app: nginx

spec:

  containers:

  - name: nginx

    image: nginx:1.14.2

    ports:

    - containerPort: 80

kubectl create -f nginx.yaml

kubectl create service nodeport nginx --tcp=80:80

kubectl get svc nginx

verify by browsing with IP address of host and port (master)

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/baremetal/deploy.yaml

kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.6.0/aio/deploy/recommended.yaml

kubectl get svc kubernetes-dashboard -n kube-system

kubectl edit svc kubernetes-dashboard -n kube-system

Change Service to NodePort from Cluster IP to expose it, check port number and hit the URL