add zfs-cleanup

zfs-cleanup

@@ -0,0 +1,71 @@
+#!/usr/bin/python
+
+import os
+from datetime import timedelta,datetime
+import dateutil.parser as dparser
+
+class Filter:
+    def __init__(self, in_str, delta):
+        self.in_str = in_str
+        self.delta = delta
+
+    def filter(self, snapshots):
+        return filter(self._filter, snapshots)
+
+    def _filter(self, s):
+        if self.in_str in s:
+            ds = dparser.parse(s.replace("mx01","mxXX").replace("G0","go"), fuzzy=True)
+            return (datetime.now()+self.delta) > ds
+        return True
+
+def filter_order(snapshots, word_list = ["hourly", "daily", "weekly", "monthly"]):
+    ds = ""
+    ds_pos = 0
+    snapshots_ret = []
+    snapshots.reverse()
+    for a in snapshots:
+        ds_a = a.split("@")[0]
+        if ds != ds_a:
+            ds = ds_a
+            ds_pos = 0
+        for idx,item in enumerate(word_list):
+            if item in a:
+                if ds_pos <= idx:
+                    ds_pos = idx
+                else:
+                    snapshots_ret.append(a)
+                    break;
+    snapshots_ret.reverse()
+    return snapshots_ret
+
+def zfs_destroy(name):
+    cmd = f"zfs destroy {name}"
+    print(cmd)
+    stream = os.popen(cmd)
+    print(stream.read())
+
+snapshots = []
+
+try:
+    with open("zfs-snaphosts.txt", "r") as f:
+        snapshots = [l.strip() for l in f.readlines()]
+except IOError:
+    print("read live")
+    stream = os.popen('zfs list -r -t snapshot -o name')
+    snapshots = stream.read().split()[1:]
+
+for a in filter_order(snapshots):
+    zfs_destroy(a)
+
+f = Filter("hourly", timedelta(hours=-25))
+snapshots = list(f.filter(snapshots))
+
+f = Filter("daily", timedelta(days=-8))
+snapshots = list(f.filter(snapshots))
+
+f = Filter("weekly", timedelta(weeks=-5))
+snapshots = list(f.filter(snapshots))
+
+
+for a in filter(lambda s: "znap" in s and not "monthly" in s, snapshots):
+    zfs_destroy(a)