From f9cb3f3daa91f3c5c643f735826b6f857a0dc677 Mon Sep 17 00:00:00 2001
From: hoangvv <shintheman12@gmail.com>
Date: Tue, 31 Dec 2024 10:38:39 +0700
Subject: [PATCH] Add ZFS-Snapshot

---
 ZFS-Snapshot | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 ZFS-Snapshot

diff --git a/ZFS-Snapshot b/ZFS-Snapshot
new file mode 100644
index 0000000..cf1088a
--- /dev/null
+++ b/ZFS-Snapshot
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# Tên dataset
+DATASET="$1"
+RETAIN="$2"
+# Định dạng tên snapshot: dataset@autosnap-YYYY-MM-DD-HH:MM:SS
+SNAPSHOT_NAME="${DATASET}@autosnap-$(date +'%Y-%m-%d-%H:%M:%S')"
+# Tạo snapshot mới
+echo "Creating snapshot: $SNAPSHOT_NAME"
+if ! zfs snapshot "$SNAPSHOT_NAME"; then
+  echo "Error creating snapshot: $SNAPSHOT_NAME"
+  exit 1
+fi
+# Liệt kê tất cả snapshot có "autosnap" trong tên và sắp xếp theo thời gian tạo
+SNAPSHOTS=$(zfs list -t snapshot -o name,creation | grep "autosnap" | sort -k2)
+# Đếm số lượng snapshot
+SNAPSHOT_COUNT=$(echo "$SNAPSHOTS" | wc -l)
+# Xóa snapshot cũ nếu vượt quá giới hạn giữ lại
+if [ "$SNAPSHOT_COUNT" -gt "$RETAIN" ]; then
+  echo "Deleting old snapshots..."
+  SNAPSHOTS_TO_DELETE=$(echo "$SNAPSHOTS" | head -n -"$RETAIN" | cut -d' ' -f1)
+  for SNAP in $SNAPSHOTS_TO_DELETE; do
+    echo "Deleting snapshot: $SNAP"
+    if ! zfs destroy "$SNAP"; then
+      echo "Error deleting snapshot: $SNAP"
+    fi
+  done
+else
+  echo "No snapshots to delete. Total snapshots: $SNAPSHOT_COUNT"
+fi