K8s installation complete

README.md

@@ -79,23 +79,42 @@ This is not exclusive guide to learn Kubernetes from scratch, rahter this is jus
  }
  }
  ```
-1. Start the Kubernetes cluster.
+1. Start the Kubernetes cluster master node.
  ```bash
  # This will spin up Kubernetes cluster with CIDR: 10.244.0.0/16
  root@vagrant:/home/vagrant# kubeadm init --pod-network-cidr=10.244.0.0/16
  kubeadm join 10.0.2.15:6443 --token 3m5dsc.toup1iv7670ya7wc --discovery-token-ca-cert-hash sha256:73f4983d43f9618522eaccf014205f969e3bacd76c98dd0c
+
+ root@vagrant:/home/vagrant# mkdir -p $HOME/.kube
+ root@vagrant:/home/vagrant# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
+ root@vagrant:/home/vagrant# sudo chown $(id -u):$(id -g) $HOME/.kube/config
  ```
 1. Conenct other VM to this cluster: Not required in case of single VM cluster. For this run perfectly, make sure:
  - VM to VM connectivity is there.
  - All there kube-* are installed in VM.
  ```bash
  kubeadm join 10.0.2.15:6443 --token 3m5dsc.toup1iv7670ya7wc --discovery-token-ca-cert-hash sha256:73f4983d43f9618522eaccf014205f969e3bacd76c98dd0c
  ```
+1. At this point, Kubernetes is installed and cluster master is up, but still we need a agent to provision and manager network for new nodes for us, This is where [Flannel](https://github.com/coreos/flannel#flannel) comes to rescue. Install Flannel to manager docker network for pods.
+ ```bash
+ kubectl apply -f \
+ https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
+ ```
+1. This step applies, if we wish to use, **our master node as worker as well**. Which is yes in our case:
+ ```
+ kubectl taint nodes $(hostname) node-role.kubernetes.io/master:NoSchedule-
+
+ # If everything goes well, you will see something like this.
+ root@vagrant:/home/vagrant# kubectl get node
+ NAME STATUS ROLES AGE VERSION
+ vagrant Ready master 3m40s v1.19.2
+ ```
+
 
 > Run all the commands from root shell.
 
 
-## What are kube*
+### What are kube*
 Kubernetes runs in client server model, similar to the way the docker runs. Kubernetes server exposes kubernetes-api, and each of kubeadm, kubelet and kubectl connect with this kubernetes server api to get the task done. In the master slave model, there are two entities: 
 - Control Plane
 - Worker Nodes