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Korakrit Chariyasathian
Korakrit Chariyasathian

Posted on • Edited on

Installing Kubernetes Single-Node Setup on Ubuntu 24.04

1. Prepare the Ubuntu VM

  • Update system packages: 
sudo apt update && sudo apt upgrade -y
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  • Disable swap (Kubernetes requires this): 
sudo swapoff -a
sudo sed -i '/ swap / s/^/#/' /etc/fstab
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2. Enable Kernel Modules and Sysctl Settings 

sudo modprobe overlay
sudo modprobe br_netfilter
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sudo tee /etc/sysctl.d/kubernetes.conf <<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
EOF
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sudo sysctl --system
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3. Install Docker or Containerd (Container Runtime) 

sudo apt install -y docker.io
sudo systemctl enable docker
sudo systemctl start docker
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or Install Containerd

sudo apt install -y containerd
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sudo mkdir -p /etc/containerd
containerd config default | sudo tee /etc/containerd/config.toml
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# Enable systemd cgroup
sudo sed -i 's/SystemdCgroup = false/SystemdCgroup = true/' /etc/containerd/config.toml
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sudo systemctl restart containerd
sudo systemctl enable containerd
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4. Add the Kubernetes APT Repository 

sudo apt install -y apt-transport-https ca-certificates curl gpg
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sudo mkdir -p /etc/apt/keyrings
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curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.33/deb/Release.key | \
sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
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echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] \
https://pkgs.k8s.io/core:/stable:/v1.33/deb/ /" | \
sudo tee /etc/apt/sources.list.d/kubernetes.list
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sudo apt update
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5. Install Kubernetes Tools: kubeadm, kubelet, kubectl 

sudo apt install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl
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6. Install Helm 

curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
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or

curl -LO https://get.helm.sh/helm-v3.17.3-linux-amd64.tar.gz
tar -zxvf helm-v3.17.3-linux-amd64.tar.gz
sudo mv linux-amd64/helm /usr/local/bin/helm
rm -rf helm-v3.17.3-linux-amd64.tar.gz
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helm version

helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
helm repo update
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7. Initialize the Kubernetes Control Plane 

sudo kubeadm init --pod-network-cidr=10.0.0.0/16
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8. Set up kubeconfig: 

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
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9. Check Node Status 

kubectl get nodes
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  • Output: is-kube shows as NotReady (because Pod Network is not yet installed)

Install Cilium CNI

1. Install cilium-cli 

curl -L --remote-name https://github.com/cilium/cilium-cli/releases/latest/download/cilium-linux-amd64.tar.gz
sudo tar xzvf cilium-linux-amd64.tar.gz -C /usr/local/bin
rm cilium-linux-amd64.tar.gz
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2. Install Cilium 

cilium install
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3. Check Node Status and Cilium Status 

kubectl get nodes
cilium status
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