adding the modprobe setup command

enable_modprobe/README.md

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+# Kubernetes Setup Script
+
+This script automates the setup and configuration of a Kubernetes environment on a Linux system. It handles kernel module loading, system configuration, and container runtime adjustments.
+
+## Overview
+
+This script performs the following tasks:
+1. **Installs the kernel-devel package**: Ensures compatibility with the current kernel version.
+2. **Loads necessary kernel modules**: Modules required for Kubernetes networking and container management.
+3. **Creates configuration files**: Sets up Kubernetes-specific configurations in `/etc/modules-load.d` and `/etc/sysctl.d`.
+4. **Disables swap**: Updates `/etc/fstab` to prevent swap usage, which is necessary for Kubernetes.
+5. **Updates containerd configuration**: Ensures `SystemdCgroup` is set to `true` for containerd.
+6. **Reboots the system**: Applies changes by rebooting the machine.
+
+## Prerequisites
+
+- A Linux-based operating system (e.g., RHEL, CentOS).
+- `dnf` package manager (for RHEL/CentOS 8 and later).
+- Root or sudo access to execute system commands.
+
+## Usage
+
+1. **Clone the Repository**: If you haven't already, clone the repository containing this script.
+
+    ```bash
+    git clone <repository-url>
+    cd <repository-directory>
+    ```
+
+2. **Make the Script Executable**:
+
+    ```bash
+    chmod +x setup-kubernetes.sh
+    ```
+
+3. **Run the Script**:
+
+    ```bash
+    sudo ./setup-kubernetes.sh
+    ```
+
+   The script will prompt you with progress messages and verify each step's success.
+
+## Script Details
+
+### Install kernel-devel Package
+
+Installs the kernel development package matching the current kernel version to ensure compatibility.
+
+### Load Kernel Modules
+
+Loads necessary kernel modules required for Kubernetes. These include:
+- `br_netfilter`
+- `ip_vs`
+- `ip_vs_rr`
+- `ip_vs_wrr`
+- `ip_vs_sh`
+- `overlay`
+
+### Create Configuration Files
+
+- **/etc/modules-load.d/kubernetes.conf**: Specifies kernel modules to load at boot.
+- **/etc/sysctl.d/kubernetes.conf**: Configures sysctl settings for Kubernetes networking.
+
+### Disable Swap
+
+Disables swap immediately and comments out swap entries in `/etc/fstab` to prevent swap usage, which is required for Kubernetes.
+
+### Update Containerd Configuration
+
+Updates the containerd configuration to set `SystemdCgroup` to `true`, ensuring proper cgroup management for containers.
+
+### Reboot System
+
+Reboots the system to apply changes and ensure all configurations are active.
+

enable_modprobe/modprobe-setup.sh

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+#!/bin/bash
+
+# Exit on error
+set -e
+
+# Retry function with verification and output capture
+retry_command() {
+    local cmd="$1"
+    local verification_cmd="$2"
+    local verification_msg="$3"
+    local retries=2
+    local count=0
+    local success=0
+
+    while [ $count -lt $retries ]; do
+        echo "Attempt $((count + 1)) for command: $cmd"
+        if eval "$cmd"; then
+            echo "Verification: $verification_cmd"
+            local verification_output
+            verification_output=$(eval "$verification_cmd" 2>&1)
+            if [ $? -eq 0 ]; then
+                echo "$verification_msg"
+                success=1
+                break
+            else
+                echo "Verification failed. Output:"
+                echo "$verification_output"
+                echo "Retrying..."
+            fi
+        else
+            echo "Command failed. Retrying..."
+        fi
+        count=$((count + 1))
+        sleep 2
+    done
+
+    if [ $success -ne 1 ]; then
+        echo "Command failed after $retries attempts. Please try this manually: $cmd"
+        exit 1
+    fi
+}
+
+# Install kernel-devel package for the current kernel version
+echo "===================="
+echo "Installing kernel-devel package..."
+echo "===================="
+retry_command "sudo dnf install -y kernel-devel-$(uname -r)" "rpm -q kernel-devel-$(uname -r)" "Kernel-devel package installed successfully."
+echo "--------------------"
+
+# Load necessary kernel modules
+echo "===================="
+echo "Loading kernel modules..."
+echo "===================="
+retry_command "sudo modprobe br_netfilter" "lsmod | grep br_netfilter" "Module br_netfilter loaded successfully."
+retry_command "sudo modprobe ip_vs" "lsmod | grep ip_vs" "Module ip_vs loaded successfully."
+retry_command "sudo modprobe ip_vs_rr" "lsmod | grep ip_vs_rr" "Module ip_vs_rr loaded successfully."
+retry_command "sudo modprobe ip_vs_wrr" "lsmod | grep ip_vs_wrr" "Module ip_vs_wrr loaded successfully."
+retry_command "sudo modprobe ip_vs_sh" "lsmod | grep ip_vs_sh" "Module ip_vs_sh loaded successfully."
+retry_command "sudo modprobe overlay" "lsmod | grep overlay" "Module overlay loaded successfully."
+echo "--------------------"
+
+# Create configuration files for Kubernetes
+echo "===================="
+echo "Creating /etc/modules-load.d/kubernetes.conf..."
+echo "===================="
+retry_command "cat > /etc/modules-load.d/kubernetes.conf << EOF
+br_netfilter
+ip_vs
+ip_vs_rr
+ip_vs_wrr
+ip_vs_sh
+overlay
+EOF" "grep 'br_netfilter' /etc/modules-load.d/kubernetes.conf && grep 'ip_vs' /etc/modules-load.d/kubernetes.conf && grep 'ip_vs_rr' /etc/modules-load.d/kubernetes.conf && grep 'ip_vs_wrr' /etc/modules-load.d/kubernetes.conf && grep 'ip_vs_sh' /etc/modules-load.d/kubernetes.conf && grep 'overlay' /etc/modules-load.d/kubernetes.conf" "Configuration file /etc/modules-load.d/kubernetes.conf created successfully."
+echo "--------------------"
+
+echo "===================="
+echo "Creating /etc/sysctl.d/kubernetes.conf..."
+echo "===================="
+retry_command "cat > /etc/sysctl.d/kubernetes.conf << EOF
+net.ipv4.ip_forward = 1
+net.bridge.bridge-nf-call-ip6tables = 1
+net.bridge.bridge-nf-call-iptables = 1
+EOF" "grep 'net.ipv4.ip_forward = 1' /etc/sysctl.d/kubernetes.conf && grep 'net.bridge.bridge-nf-call-ip6tables = 1' /etc/sysctl.d/kubernetes.conf && grep 'net.bridge.bridge-nf-call-iptables = 1' /etc/sysctl.d/kubernetes.conf" "Configuration file /etc/sysctl.d/kubernetes.conf created successfully."
+echo "--------------------"
+
+# Disable swap by commenting out the swap line in /etc/fstab
+echo "===================="
+echo "Disabling swap..."
+echo "===================="
+# Disable swap immediately
+sudo swapoff -a
+echo   "Swap disabled successfully."
+# Comment out swap entries in /etc/fstab
+#retry_command "sudo sed -i '/swap/s/^/#/' /etc/fstab" "grep '^#' /etc/fstab" "Swap disabled successfully."
+echo "--------------------"
+
+# Update containerd config
+echo "===================="
+echo "Updating containerd configuration..."
+echo "===================="
+# Remove existing systemd_cgroup setting if present
+retry_command "sudo sed -i '/systemd_cgroup/d' /etc/containerd/config.toml" "grep 'systemd_cgroup' /etc/containerd/config.toml || true" "Existing systemd_cgroup setting removed successfully."
+# Set SystemdCgroup = true
+retry_command "sudo sed -i 's/SystemdCgroup = false/SystemdCgroup = true/g' /etc/containerd/config.toml" "grep 'SystemdCgroup = true' /etc/containerd/config.toml" "Containerd configuration updated successfully."
+echo "--------------------"
+
+# Reboot the system
+echo "===================="
+echo "Rebooting the system..."
+echo "===================="
+retry_command "sudo systemctl reboot" "systemctl is-system-running --quiet" "System reboot initiated successfully."