Clone the code repo by running command: git clone https://github.com/nobleprogmysql/CKAD.git

go to Downloads and code repository (cka)

run vagrant up (to bring 3 nodes up, 1 master node and 2 worker nodes setup)

Below is kubernetes cluster setup commands

1. Update the apt package index and install packages needed to use the Kubernetes apt repository

{ sudo apt-get update sudo apt-get install -y apt-transport-https ca-certificates curl }

2. Set up the required kernel modules and make them persistent

{ cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf overlay br_netfilter EOF

sudo modprobe overlay
sudo modprobe br_netfilter

}

3. Enabling Network Forwarding and iptables Rules for Kubernetes

{ cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-iptables = 1 net.bridge.bridge-nf-call-ip6tables = 1 net.ipv4.ip_forward = 1 EOF

sudo sysctl --system

}

4. Installing containerd Runtime for Kubernetes

sudo apt-get install -y containerd

5. systemd cgroup configuration

{ sudo mkdir -p /etc/containerd containerd config default | sed 's/SystemdCgroup = false/SystemdCgroup = true/' | sudo tee /etc/containerd/config.toml }

6. restart

sudo systemctl restart containerd

7. kubernetes latest version

KUBE_LATEST=$(curl -L -s https://dl.k8s.io/release/stable.txt | awk 'BEGIN { FS="." } { printf "%s.%s", $1, $2 }') KUBE_LATEST=1.31

8. Adding Kubernetes APT Repository GPG Key

{ sudo mkdir -p /etc/apt/keyrings curl -fsSL https://pkgs.k8s.io/core:/stable:/${KUBE_LATEST}/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg }

9. Adding Kubernetes APT Repository to Sources List

echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/${KUBE_LATEST}/deb/ /" | sudo tee /etc/apt/sources.list.d/kubernetes.list

10. install kubelet kubeadm and kubectl

{ sudo apt-get update sudo apt-get install -y kubelet kubeadm kubectl sudo apt-mark hold kubelet kubeadm kubectl }

11. configure crictl

sudo crictl config
--set runtime-endpoint=unix:///run/containerd/containerd.sock
--set image-endpoint=unix:///run/containerd/containerd.sock

12 get ip addr

ip addr PRIMARY_IP=

13. Configuring Kubelet with Custom Node IP

cat <<EOF | sudo tee /etc/default/kubelet KUBELET_EXTRA_ARGS='--node-ip ${PRIMARY_IP}' EOF

Run Below commands on controlplane node

14

POD_CIDR=10.244.0.0/16 SERVICE_CIDR=10.96.0.0/16 sudo kubeadm init --pod-network-cidr $POD_CIDR --service-cidr $SERVICE_CIDR --apiserver-advertise-address $PRIMARY_IP

15. Set up the kubeconfig so it can be used by the user you are logged in as

{ mkdir ~/.kube sudo cp /etc/kubernetes/admin.conf ~/.kube/config sudo chown $(id -u):$(id -g) ~/.kube/config chmod 600 ~/.kube/config }

16 Verify the controlplane node

kubectl get pods -n kube-system

#17 Install weavenet as pods kubectl apply -f "https://github.com/weaveworks/weave/releases/download/v2.8.1/weave-daemonset-k8s-1.11.yaml"

18 Print join command to join the worker nodes

kubeadm token create --print-join-command

Run below on all worker nodes--

18

Run the join command on all the worker nodes in cluster sudo join_command_from_step_18