febrd/kubernetes

Script for Automating Kubernetes Installation on Debian and Other Debian-based Distributions

Kubernetes Installation on Debian

This script automates the installation of Kubernetes on Debian and Debian-based distributions. It also installs Docker, disables swap, and configures the necessary Kubernetes repositories.

Prerequisites

• Debian 10 or newer / Kali Linux
• sudo access

Steps

1. Update Package Lists and Install Dependencies:

   The script will update your package lists and install the required dependencies.

2. Install Docker:

   Docker is required to run Kubernetes containers. The script will add the Docker repository and install Docker.

3. Disable Swap:

   Kubernetes requires swap to be disabled. The script will disable swap and update the fstab file to ensure swap remains off after a reboot.

4. Install Kubernetes:

   The script will add the Kubernetes repository and install kubelet, kubeadm, and kubectl.

5. Initialize Kubernetes:

   After installing Kubernetes, the script will run kubeadm init to initialize the Kubernetes cluster.

6. Configure Kubeconfig:

   The script will set up the kubeconfig file so you can access your Kubernetes cluster.

Script

Copy and run the following script to automate the installation process:

#!/bin/bash

# Update package lists
sudo apt update

# Install dependencies
sudo apt install -y apt-transport-https ca-certificates gnupg2 curl software-properties-common libssl-dev

# Add Docker repository
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian $(lsb_release -cs) stable"

# For Kali Linux
# sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian bullseye stable"

# Update package lists
sudo apt update

# Install Docker
sudo apt install -y docker-ce
# sudo systemctl status docker

# Disable swap
sudo swapoff -a
sudo sed -i '/ swap / s/^/#/' /etc/fstab

# Add Kubernetes repository
sudo mkdir -p -m 755 /etc/apt/keyrings
curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
sudo chmod 644 /etc/apt/keyrings/kubernetes-apt-keyring.gpg
echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list
sudo chmod 644 /etc/apt/sources.list.d/kubernetes.list

# Update package lists
sudo apt update

# Install Kubernetes
sudo apt install -y kubelet kubeadm kubectl

# Remove containerd configuration
sudo rm -rf /etc/containerd/config.toml
sudo systemctl restart containerd

# Initialize Kubernetes cluster
sudo kubeadm init

# 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

Notes

• Ensure to check the latest versions of Kubernetes and Docker to use versions that fit your requirements.
• After initializing Kubernetes, you may need to install a CNI network plugin and configure worker nodes.

If you have any questions or issues, feel free to contact us.