upload working script

check_pve_backup_lxc.sh

@@ -0,0 +1,69 @@
+#!/usr/bin/env bash
+set -u
+
+DAYS="${1:-7}"
+LOGDIR="/var/log/vzdump"
+
+STATE_OK=0
+STATE_CRITICAL=2
+STATE_UNKNOWN=3
+
+if [[ ! -d "$LOGDIR" ]]; then
+  echo "UNKNOWN - ${LOGDIR} not found"
+  exit $STATE_UNKNOWN
+fi
+
+mapfile -t files < <(find "$LOGDIR" -maxdepth 1 -type f -mtime "-$DAYS" \
+  \( -name 'lxc-*.log' -o -name '*lxc*.log' \) 2>/dev/null)
+
+if [[ "${#files[@]}" -eq 0 ]]; then
+  echo "CRITICAL - no LXC vzdump logs found in ${LOGDIR} within last ${DAYS} days"
+  exit $STATE_CRITICAL
+fi
+
+relevant=0
+bad=0
+bad_list=()
+
+for f in "${files[@]}"; do
+  # LXC log if filename is lxc-<id>.log or contains CT backup marker
+  if [[ "$(basename "$f")" =~ ^lxc-[0-9]+\.log$ ]] || grep -qE 'Starting Backup of (CT|VM) [0-9]+' "$f" 2>/dev/null; then
+    ((relevant++))
+
+    # Extract CTID from filename if possible
+    ctid="$(basename "$f" | sed -n 's/^lxc-\([0-9]\+\)\.log$/\1/p')"
+    [[ -z "${ctid:-}" ]] && ctid="$(grep -oE 'Starting Backup of (CT|VM) [0-9]+' "$f" | head -n1 | awk '{print $7}')"
+    [[ -z "${ctid:-}" ]] && ctid="unknown"
+
+    # Error detection
+    if grep -qE 'TASK ERROR|Backup of (CT|VM) [0-9]+ failed|^ERROR:' "$f" 2>/dev/null; then
+      ((bad++))
+      hint="$(grep -E 'TASK ERROR|Backup of (CT|VM) [0-9]+ failed|^ERROR:' "$f" | tail -n1 | sed 's/^[[:space:]]*//')"
+      bad_list+=("CT ${ctid}: ${hint}")
+      continue
+    fi
+
+    # Success detection
+    if grep -qE '(^|\s)TASK OK(\s|$)|Backup job finished successfully' "$f" 2>/dev/null; then
+      : # ok
+    else
+      ((bad++))
+      bad_list+=("CT ${ctid}: no success marker found")
+    fi
+  fi
+done
+
+if [[ "$relevant" -eq 0 ]]; then
+  echo "CRITICAL - no LXC (CT) backup logs found in last ${DAYS} days"
+  exit $STATE_CRITICAL
+fi
+
+if [[ "$bad" -gt 0 ]]; then
+  details="$(printf '%s; ' "${bad_list[@]:0:5}")"
+  [[ "$bad" -gt 5 ]] && details="${details}...(+$(("$bad"-5)) more)"
+  echo "CRITICAL - ${bad}/${relevant} LXC backup log(s) not OK in last ${DAYS} days - ${details}"
+  exit $STATE_CRITICAL
+fi
+
+echo "OK - ${relevant} LXC backup log(s) OK in last ${DAYS} days"
+exit $STATE_OK