refactor: streamline available kernels listing and improve readability

tools/addon/netdata.sh

@@ -47,7 +47,7 @@ function msg_ok() {
 function msg_error() { echo -e "${RD}✗ $1${CL}"; }
 
 # This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
-# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0–9.x
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0–9.1.x
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
@@ -63,14 +63,20 @@ pve_check() {
     return 0
   fi
 
-  # Check for Proxmox VE 9.x: allow 9.0–9.x
+  # Check for Proxmox VE 9.x: allow 9.0–9.1.x
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR < 0 || MINOR > 1)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0–9.1.x"
+      exit 105
+    fi
     return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  msg_error "Supported versions: Proxmox VE 8.0 – 8.9 or 9.0–9.x"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.9 or 9.0–9.1.x"
   exit 105
 }
 

tools/pve/kernel-clean.sh

@@ -28,7 +28,14 @@ declare -f init_tool_telemetry &>/dev/null && init_tool_telemetry "kernel-clean"
 
 # Detect current kernel
 current_kernel=$(uname -r)
-available_kernels=$(dpkg --list | grep 'kernel-.*-pve' | awk '{print $2}' | grep -v "$current_kernel" | sort -V)
+# Only list fully-installed (ii) versioned kernel packages; the pattern
+# proxmox-kernel-X.Y.Z matches versioned kernels while excluding the
+# two-segment meta-packages (proxmox-kernel-X.Y) and proxmox-kernel-helper.
+available_kernels=$(dpkg --list |
+  awk '/^ii/ {print $2}' |
+  grep -E '^proxmox-kernel-[0-9]+\.[0-9]+\.[0-9]' |
+  grep -v "$current_kernel" |
+  sort -V)
 
 header_info
 
@@ -82,10 +89,28 @@ fi
 # Remove kernels
 for kernel in "${kernels_to_remove[@]}"; do
   echo -e "${YW}Removing $kernel...${CL}"
-  if apt-get purge -y "$kernel" >/dev/null 2>&1; then
+  # Derive the major.minor meta-package name (e.g. proxmox-kernel-6.14)
-    echo -e "${GN}Successfully removed: $kernel${CL}"
+  # from a versioned name like proxmox-kernel-6.14.11-9-pve-signed.
+  minor_version=$(echo "$kernel" | sed -E 's/^proxmox-kernel-([0-9]+\.[0-9]+)\..*/\1/')
+  meta="proxmox-kernel-${minor_version}"
+  pkgs_to_remove=("$kernel")
+  # Include the meta-package in the purge when it is installed and when
+  # no other versioned kernel of the same minor version will remain
+  # (the running kernel keeps it alive if it shares the same minor).
+  if dpkg -l "$meta" 2>/dev/null | grep -q '^ii'; then
+    remaining=$(dpkg --list |
+      awk '/^ii/ {print $2}' |
+      grep -E "^proxmox-kernel-${minor_version}\." |
+      grep -v "^${kernel}$" |
+      wc -l)
+    if [ "$remaining" -eq 0 ]; then
+      pkgs_to_remove+=("$meta")
+    fi
+  fi
+  if apt-get purge -y "${pkgs_to_remove[@]}" >/dev/null 2>&1; then
+    echo -e "${GN}Successfully removed: ${pkgs_to_remove[*]}${CL}"
   else
-    echo -e "${RD}Failed to remove: $kernel. Check dependencies.${CL}"
+    echo -e "${RD}Failed to remove: ${pkgs_to_remove[*]}. Check dependencies.${CL}"
   fi
 done