Initial backup: 18 monitoring scripts + timers + docs

- 18 comprehensive monitoring checks
- 5 systemd timers (5min, 15min, hourly, daily, weekly)
- Complete documentation
- NTFY secure notification system
- Fixed debianvm disk space (91% to 57%)
- Fixed CloudReve integration
- Date: 2026-01-07

scripts/check-thin-pools.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+# Monitor LVM thin pools - improved to avoid false positives
+set -euo pipefail
+
+SEND_NTFY="/usr/local/bin/send-ntfy.sh"
+
+# Check thin pool OVERALL usage (not individual VM disks)
+for POOL in $(lvs --noheadings -o vg_name,lv_name,lv_attr 2>/dev/null | grep 't' | awk '{print $1"/"$2}'); do
+    # Get data and metadata usage for the POOL itself
+    DATA_PERCENT=$(lvs --noheadings -o data_percent "$POOL" 2>/dev/null | tr -d ' ' | sed 's/\..*//')
+    META_PERCENT=$(lvs --noheadings -o metadata_percent "$POOL" 2>/dev/null | tr -d ' ' | sed 's/\..*//')
+    
+    # Skip if empty
+    if [ -z "$DATA_PERCENT" ] || [ "$DATA_PERCENT" = "" ]; then
+        continue
+    fi
+    
+    POOL_NAME=$(echo $POOL | sed 's/\//--/g')
+    
+    # Alert on POOL usage, not individual VM disks
+    if [ "$DATA_PERCENT" -gt 90 ]; then
+        $SEND_NTFY critical "Thin Pool CRITICAL" "🔴 CRITICAL: Thin pool $POOL_NAME DATA at ${DATA_PERCENT}%! ALL VMs on this pool will FREEZE if full!" "skull,error,cd"
+    elif [ "$DATA_PERCENT" -gt 80 ]; then
+        $SEND_NTFY warning "Thin Pool Warning" "🟡 WARNING: Thin pool $POOL_NAME DATA at ${DATA_PERCENT}% - take action before 90%" "warning,cd"
+    fi
+    
+    if [ -n "$META_PERCENT" ] && [ "$META_PERCENT" != "" ]; then
+        if [ "$META_PERCENT" -gt 90 ]; then
+            $SEND_NTFY critical "Thin Pool Metadata CRITICAL" "🔴 CRITICAL: Thin pool $POOL_NAME METADATA at ${META_PERCENT}%!" "skull,error,cd"
+        elif [ "$META_PERCENT" -gt 80 ]; then
+            $SEND_NTFY warning "Thin Pool Metadata Warning" "🟡 WARNING: Thin pool $POOL_NAME METADATA at ${META_PERCENT}%" "warning,cd"
+        fi
+    fi
+    
+    logger -t thin-pool-monitor "$POOL_NAME: Data ${DATA_PERCENT}%, Metadata ${META_PERCENT}%"
+done
+
+# Separately check for INDIVIDUAL VM disks that are dangerously full
+# This is INFO level since the VM can be expanded
+FULL_DISKS=$(lvs --noheadings -o lv_name,data_percent 2>/dev/null | grep "vm-" | awk '$2 > 95 {print $1" at "$2"%"}')
+
+if [ -n "$FULL_DISKS" ]; then
+    $SEND_NTFY info "VM Disks Nearly Full" "ℹ️ INFO: Some VM disks are >95% full. These can be expanded if needed:\n$FULL_DISKS" "info,cd"
+fi