Setup Kubernetes Cluster with Zero Cost
You can download screen_shot.docx file, it has screen shots for all the steps.
This tutorial will help you to setup Kubernetes cluster (1 Master and 2 worker Nodes) on your Laptop. You need have windows 10 with minimum 8 GB of RAM. We will bootstrap all 3 machine using vagrant and Oracle Virtual Box. For example: Master: 192.168.56.100 worker1:192.168.56.101 worker2: 192.168.56.102
To start with, please install latest vagrant, virtual Box and Git on your windows and reboot it. Please make sure the VT-visualization is enable at BIOS.
Clone this repository and cd to Kubernetes_Ubuntu
Create Virtual Machines:
Before start, we should know our Ethernet adapter VirtualBox Host-Only Network ips. It is required since each box created with Vagrant will have 10.0.2.15 for eth0 by default and we want to setup our own private ips such as (192.168.56.100, 192.168.56.101 and 192.168.56.102 )which will help us to communicate internally and outside network(internet). You can get to know this ip by executing ipconfig in command prompt. Once you clone this repo, cd kubernetes_automation and run "vagran up" from respective directory such as(master/worker1/worker2), this will create virtual boxes and install the required packages for kubernestes, you can verify these packages by looking as "Vagrantfile" from each directory.
Once all 3 boxes are ready, you can login to those boxes by running "vagrant ssh" from respective directory/folder.
Run on only on Master: sudo kubeadm init --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=192.168.56.100 (as vagrant user). you will get the following output from above command: Your Kubernetes master has initialized successfully!
To start using your cluster, you need to run the following as a regular user:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf
You can now join any number of machines by running the following on each node as root:
kubeadm join 192.168.56.100:6443 --token sgqytl.0e2fuz8h8d40insu --discovery-token-ca-cert-hash sha256:f48196753fdfddddfdd(I have truncated this token, you will get your own token from kubeadm init command)
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/bc79dd1505b0c8681ece4de4c0d86c5cd2643275/Documentation/kube-flannel.yml
kubectl get nodes (wait for sometime, it status will become ready)
Run on worker1/woroker2 to join these workers on masters. sudo kubeadm join 192.168.56.100:6443 --token sgqytl.0e2fuz8h8d40insu --discovery-token-ca-cert-hash sha256:f48196753dfdfddd
Congratulation! You have successfully setup the Kubernetes cluster. You can verify by running kubectl get nodes on master
We will deploy a apache pod and access it with service which exposed to Nodeport 30080:
cd /vagrant/apache on master instance, the apache directory containing deployment.yaml service.yaml
create deployment by running
kubectl create -f deployment.yaml
kubectl get deployment
vagrant@master:/vagrant/apache$ kubectl get pods
You can access the apache using one of nodeips such http://192.168.56.101:30080
This completes the setup up kubernetes cluster and deployment of apache