Add testing script, since bmw lab repo is private
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test-scripts/install_k8s.sh
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260
test-scripts/install_k8s.sh
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#!/bin/bash
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# Capture start time
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start_time=$(date +%s)
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workspace=$(pwd)
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# Check for sudo privilege
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if [ "$EUID" -ne 0 ]; then
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echo "Please run as root"
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exit 1
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fi
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host_name="smolite"
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# read -p "Enter option (1.SMO Only; 2. NearRT Only; 3. SMO+NearRT ): " OPTION
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read -p "Enter IP address: " VM_IP
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KUBEVERSION="1.32.3-1.1"
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HELMVERSION="3.14.2"
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command_exists() {
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command -v "$1" >/dev/null 2>&1
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}
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# Function to check internet connectivity
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check_internet() {
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echo "Checking internet connection..."
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if ping -q -c 1 -W 1 google.com &>/dev/null; then
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echo "Internet connection is active."
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else
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echo "Error: No internet connection. Please ensure your system has access to the internet."
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exit 1
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fi
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}
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# Function to check if curl is installed and install if not
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check_and_install_curl() {
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echo "Checking if curl is installed..."
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if ! command_exists curl; then
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echo "curl is not installed. Installing now..."
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sudo apt update
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sudo apt install -y curl
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if command_exists curl; then
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echo "curl has been successfully installed."
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else
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echo "Error: Failed to install curl. Please check your internet connection and try again."
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exit 1
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fi
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else
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echo "curl is already installed."
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fi
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}
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# Function to check for existing Kubernetes cluster and prompt for removal
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check_existing_cluster() {
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if command_exists kubectl && kubectl cluster-info &>/dev/null; then
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read -p "Existing Kubernetes cluster found. Do you want to remove it? (y/N): " remove_cluster
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if [[ "$remove_cluster" != "y" && "$remove_cluster" != "Y" ]]; then
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echo "Kubernetes cluster removal skipped. Exiting script."
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exit 0
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fi
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echo "Removing existing Kubernetes cluster..."
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kubeadm reset -f
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sudo apt-get -y purge kubeadm kubectl kubelet kubernetes-cni kube* containerd
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sudo apt-get -y autoremove
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sudo rm -rf ~/.kube
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apt-get -y autoremove
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fi
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}
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# Function to disable swap
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disable_swap() {
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echo "Disabling swap..."
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sudo swapon --show >/dev/null 2>&1
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if [ $? -eq 0 ]; then
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sudo swapoff -a
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sudo rm /swapfile
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sudo sed -i 's/\/swap.img/#\/swap.img/' /etc/fstab
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else
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echo "No swap is currently enabled."
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fi
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}
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# Function to check Ubuntu version
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check_ubuntu_version() {
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os_version=$(lsb_release -rs)
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if [ "$os_version" != "22.04" ] && [ "$os_version" != "24.04" ]; then
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echo "Error: Unsupported Ubuntu version. This script supports 22.04 and 24.04 only."
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exit 1
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fi
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}
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# Function to handle errors
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handle_error() {
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echo "Error occurred at step $1. Exiting..."
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exit 1
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}
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# Function to check if namespace exists
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check_namespace_not_exists() {
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local namespace="$1"
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if kubectl get namespace "$namespace" &>/dev/null; then
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echo "Namespace '$namespace' exists. Skipping steps..."
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return 0 # Namespace exists
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else
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echo "Namespace '$namespace' does not exist."
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return 1 # Namespace does not exist
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fi
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}
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# Check Ubuntu version
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echo "Checking Ubuntu version..."
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check_ubuntu_version
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# Check internet connection
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check_internet
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# Check and install curl if not present
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check_and_install_curl
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# Check for existing Kubernetes cluster and prompt for removal
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check_existing_cluster
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# Disable swap
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disable_swap
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# Script for Installing Docker,Kubernetes and Helm
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wait_for_pods_running() {
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NS="$2"
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CMD="kubectl get pods --all-namespaces "
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if [ "$NS" != "all-namespaces" ]; then
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CMD="kubectl get pods -n $2 "
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fi
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KEYWORD="Running"
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if [ "$#" == "3" ]; then
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KEYWORD="${3}.*Running"
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fi
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CMD2="$CMD | grep \"$KEYWORD\" | wc -l"
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NUMPODS=$(eval "$CMD2")
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echo "waiting for $NUMPODS/$1 pods running in namespace [$NS] with keyword [$KEYWORD]"
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while [ $NUMPODS -lt $1 ]; do
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sleep 5
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NUMPODS=$(eval "$CMD2")
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echo "> waiting for $NUMPODS/$1 pods running in namespace [$NS] with keyword [$KEYWORD]"
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done
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}
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# Step x: Edit /etc/sysctl.conf to add fs.inotify.max_user_watches and fs.inotify.max_user_instances. This shoudl be done before containerd installation
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echo "==========================================================="
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echo " Preping the ENV: Editing /etc/sysctl.conf..."
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echo "==========================================================="
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bash -c 'echo "fs.inotify.max_user_watches=524288" >> /etc/sysctl.conf'
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bash -c 'echo "fs.inotify.max_user_instances=512" >> /etc/sysctl.conf'
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bash -c 'echo "fs.inotify.max_queued_events=16384" >> /etc/sysctl.conf'
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bash -c 'echo "vm.max_map_count=262144" >> /etc/sysctl.conf'
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# Apply sysctl params without reboot
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sudo sysctl --system
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# # Installing Docker
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# echo "****************************************************************************************************************"
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# echo " Installing Docker "
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# echo "****************************************************************************************************************"
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# apt-get install -y --allow-downgrades --allow-change-held-packages --allow-unauthenticated --ignore-hold docker.io=${DOCKERVERSION}
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# cat > /etc/docker/daemon.json <<EOF
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# {
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# "exec-opts": ["native.cgroupdriver=systemd"],
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# "log-driver": "json-file",
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# "log-opts": {
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# "max-size": "100m"
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# }
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# }
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# EOF
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# mkdir -p /etc/systemd/system/docker.service.d
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# systemctl enable docker.service
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# systemctl daemon-reload
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# systemctl restart docker
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# Installing containerd
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modprobe overlay
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modprobe br_netfilter
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cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
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overlay
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br_netfilter
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EOF
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# sysctl params required by setup, params persist across reboots
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cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
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net.ipv4.ip_forward = 1
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EOF
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# Apply sysctl params without reboot
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sudo sysctl --system
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#V erify that net.ipv4.ip_forward is set to 1 with:
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sysctl net.ipv4.ip_forward
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echo "****************************************************************************************************************"
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echo " Installing Containerd "
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echo "****************************************************************************************************************"
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sysctl --system
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apt-get update
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apt-get install -y containerd
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mkdir -p /etc/containerd
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containerd config default | sudo tee /etc/containerd/config.toml
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sed -i 's/SystemdCgroup \= false/SystemdCgroup \= true/g' /etc/containerd/config.toml
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systemctl restart containerd
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# Helm Installation
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echo "****************************************************************************************************************"
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echo " Installing Helm "
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echo "****************************************************************************************************************"
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wget https://get.helm.sh/helm-v${HELMVERSION}-linux-amd64.tar.gz
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tar -xvf helm-v${HELMVERSION}-linux-amd64.tar.gz
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mv linux-amd64/helm /usr/local/bin/helm
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helm version
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rm helm-v${HELMVERSION}-linux-amd64.tar.gz
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# Installing Kubernetes Packages
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echo "***************************************************************************************************************"
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echo " Installing Kubernetes "
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echo "***************************************************************************************************************"
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rm /etc/apt/keyrings/kubernetes-apt-keyring.gpg
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mkdir -p /etc/apt/keyrings
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curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.32/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:/v1.32/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list
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apt update
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apt-cache policy kubelet | grep 'Installed: (none)' -A 1000 | grep 'Candidate:' | awk '{print $2}'
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# Installing Kubectl, Kubeadm and kubelet
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apt install -y kubeadm=${KUBEVERSION} kubelet=${KUBEVERSION} kubectl=${KUBEVERSION}
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kubeadm init --apiserver-advertise-address=${VM_IP} --pod-network-cidr=10.244.0.0/16 --v=5
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mkdir -p $HOME/.kube
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cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
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chown $(id -u):$(id -g) $HOME/.kube/config
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export KUBECONFIG=/etc/kubernetes/admin.conf
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kubectl taint nodes --all node-role.kubernetes.io/control-plane-
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kubectl taint nodes --all node.kubernetes.io/not-ready-
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kubectl get pods -A
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kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
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wait_for_pods_running 1 kube-flannel
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wait_for_pods_running 7 kube-system
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echo "***************************************************************************************************************"
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kubectl get pods -A
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echo "***************************************************************************************************************"
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