From 9241d128dbcda25932bb2340fb29bf52cb3f4df7 Mon Sep 17 00:00:00 2001
From: hhf <hhf@noreply.localhost>
Date: Sat, 7 Dec 2024 12:00:25 +0530
Subject: [PATCH] Add resize_vm_disk.sh

---
 resize_vm_disk.sh | 112 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 resize_vm_disk.sh

diff --git a/resize_vm_disk.sh b/resize_vm_disk.sh
new file mode 100644
index 0000000..c17d5fe
--- /dev/null
+++ b/resize_vm_disk.sh
@@ -0,0 +1,112 @@
+#!/bin/bash
+
+# Script to resize LVM partition after expanding disk in Proxmox
+# Must be run as root
+
+# Exit on any error
+set -e
+
+# Function to check if running as root
+check_root() {
+    if [ "$(id -u)" != "0" ]; then
+        echo "Error: This script must be run as root" >&2
+        exit 1
+    fi
+}
+
+# Function to check if required tools are installed
+check_requirements() {
+    local required_tools=("parted" "pvresize" "lvresize" "resize2fs")
+    
+    for tool in "${required_tools[@]}"; do
+        if ! command -v "$tool" >/dev/null 2>&1; then
+            echo "Error: Required tool '$tool' is not installed" >&2
+            exit 1
+        fi
+    done
+}
+
+# Function to verify LVM setup
+verify_lvm() {
+    if ! vgs ubuntu-vg >/dev/null 2>&1; then
+        echo "Error: Volume group 'ubuntu-vg' not found" >&2
+        exit 1
+    fi
+
+    if ! lvs ubuntu-vg/ubuntu-lv >/dev/null 2>&1; then
+        echo "Error: Logical volume 'ubuntu-lv' not found" >&2
+        exit 1
+    fi
+}
+
+# Function to backup partition table
+backup_partition_table() {
+    local backup_file="/root/partition_backup_$(date +%Y%m%d_%H%M%S).bak"
+    echo "Creating partition table backup at $backup_file"
+    sfdisk -d /dev/sda > "$backup_file"
+}
+
+# Main resize function
+perform_resize() {
+    echo "Starting disk resize process..."
+    
+    # Resize partition using parted
+    echo "Resizing partition..."
+    parted -s /dev/sda resizepart 3 100%
+    
+    # Give system time to register new partition size
+    sleep 2
+    
+    echo "Resizing physical volume..."
+    pvresize /dev/sda3
+    
+    echo "Resizing logical volume..."
+    lvresize -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
+    
+    echo "Resizing filesystem..."
+    resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
+}
+
+# Function to verify successful resize
+verify_resize() {
+    echo "Verifying resize operation..."
+    
+    # Check if filesystem is clean
+    if ! e2fsck -n /dev/mapper/ubuntu--vg-ubuntu--lv >/dev/null 2>&1; then
+        echo "Warning: Filesystem check recommended after resize" >&2
+    fi
+    
+    # Display new size information
+    echo -e "\nNew disk space information:"
+    df -h /
+    lvs ubuntu-vg/ubuntu-lv
+}
+
+# Main execution
+main() {
+    echo "Starting LVM disk resize script..."
+    
+    # Run checks
+    check_root
+    check_requirements
+    verify_lvm
+    
+    # Create backup
+    backup_partition_table
+    
+    # Perform resize
+    perform_resize
+    
+    # Verify results
+    verify_resize
+    
+    echo -e "\nDisk resize completed successfully!"
+}
+
+# Execute main function with error handling
+if main; then
+    exit 0
+else
+    echo "Error: Resize process failed" >&2
+    exit 1
+fi
\ No newline at end of file