From 56a40e91fd330383e552a955346ea11e0dcd5a3a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kry=C5=A1tof=20Pe=C5=A1ek=20=28Kof=29?=
 <krystof.pesek@gmail.com>
Date: Tue, 3 Nov 2026 20:06:10 +0100
Subject: [PATCH] feat(fleet): add nbd-swap remote RAM swap and backup-kof17
 tool for bazina

---
 backup-kof17 | 32 ++++++++++++++++++++++++++++
 nbd-swap     | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 92 insertions(+)
 create mode 100755 backup-kof17
 create mode 100755 nbd-swap

diff --git a/backup-kof17 b/backup-kof17
new file mode 100755
index 0000000..575d9da
--- /dev/null
+++ b/backup-kof17
@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+# backup-kof17: Incremental rsync backup of boxC:/mnt/kof17 to bazina SSD
+set -euo pipefail
+
+SRC="/mnt/data/"
+DEST="/mnt/ssd/kof17_backup/"
+LOG_FILE="/mnt/ssd/kof17_backup/backup.log"
+
+if [ ! -d "$SRC" ]; then
+    echo "Error: Source $SRC is not mounted!" >&2
+    exit 1
+fi
+
+if [ ! -d "/mnt/ssd" ]; then
+    echo "Error: /mnt/ssd is not mounted on this host!" >&2
+    exit 1
+fi
+
+mkdir -p "$DEST"
+echo "=== Starting kof17 backup: $(date -Iseconds) ===" | tee -a "$LOG_FILE"
+echo "Source: $SRC"
+echo "Destination: $DEST"
+
+rsync -aHAXx \
+    --numeric-ids \
+    --info=progress2 \
+    --delete \
+    --exclude='.Trash*' \
+    --exclude='lost+found' \
+    "$SRC" "$DEST" 2>&1 | tee -a "$LOG_FILE"
+
+echo "=== Backup completed: $(date -Iseconds) ===" | tee -a "$LOG_FILE"
diff --git a/nbd-swap b/nbd-swap
new file mode 100755
index 0000000..0ea143f
--- /dev/null
+++ b/nbd-swap
@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+# nbd-swap: High-speed RAM swap over network (10.0.0.15 bazina -> 10.0.0.18 t520)
+set -euo pipefail
+
+SERVER="10.0.0.15"
+PORT="10809"
+EXPORT="t520_swap"
+DEV="/dev/nbd0"
+
+status() {
+    echo "=== NBD Network Swap Status ==="
+    if swapon --show | grep -q "$DEV"; then
+        echo "Swap active on $DEV:"
+        swapon --show | grep "$DEV"
+    else
+        echo "Swap is NOT active on $DEV."
+    fi
+    if [ -b "$DEV" ] && lsblk "$DEV" | grep -q "$DEV"; then
+        lsblk "$DEV"
+    fi
+}
+
+start() {
+    sudo modprobe nbd
+    if swapon --show | grep -q "$DEV"; then
+        echo "Swap already active on $DEV."
+        exit 0
+    fi
+    # If device is connected, disconnect first
+    if lsblk "$DEV" 2>/dev/null | grep -q "nbd0"; then
+        sudo nbd-client -d "$DEV" 2>/dev/null || true
+        sleep 1
+    fi
+    echo "Connecting $DEV to $SERVER:$PORT ($EXPORT)..."
+    sudo nbd-client "$SERVER" "$PORT" -N "$EXPORT" "$DEV"
+    echo "Initializing and activating swap on $DEV (priority 100)..."
+    sudo mkswap "$DEV" >/dev/null
+    sudo swapon -p 100 "$DEV"
+    status
+}
+
+stop() {
+    echo "Deactivating swap on $DEV..."
+    if swapon --show | grep -q "$DEV"; then
+        sudo swapoff "$DEV"
+    fi
+    if lsblk "$DEV" 2>/dev/null | grep -q "nbd0"; then
+        echo "Disconnecting NBD client..."
+        sudo nbd-client -d "$DEV"
+    fi
+    echo "NBD swap stopped."
+}
+
+case "${1:-status}" in
+    start) start ;;
+    stop) stop ;;
+    status) status ;;
+    restart) stop; sleep 1; start ;;
+    *) echo "Usage: $0 {start|stop|restart|status}" ; exit 1 ;;
+esac