bundles/zfs: import bundle from work repository

bundles/zfs/files/check_zpool_space

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+
+
+from subprocess import check_output
+from sys import argv, exit
+import re
+
+
+def to_bytes(size):
+    suffixes = ['', 'K', 'M', 'G', 'T', 'P']
+    number, suffix = re.match(r'([0-9\.]+)([A-Z]?)', size).groups()
+    assert suffix in suffixes, 'Unexpected suffix "{}" in size "{}"'.format(suffix, size)
+    return float(number) * 1024**suffixes.index(suffix)
+
+
+pool = argv[1]
+critical_perc = float(argv[2])
+
+try:
+    output = check_output(['zpool', 'list', '-Ho', 'size,alloc', pool])
+except:
+    print('CRITICAL - "zpool" failed')
+    exit(2)
+
+size, alloc = output.decode('UTF-8').strip().split()
+
+try:
+    size_b = to_bytes(size)
+    alloc_b = to_bytes(alloc)
+except:
+    print('CRITICAL - Could not process output of "zpool list": {}'.format(output))
+    exit(2)
+
+percentage = alloc_b / size_b * 100
+if percentage > critical_perc:
+    print('CRITICAL - Pool "{}" uses {:.2f}% of its space'.format(pool, percentage))
+    exit(2)
+
+print('OK - Pool "{}" uses {:.2f}% of its space'.format(pool, percentage))
+exit(0)