check_zpool_space

bundles/zfs/files/check_zpool_space

@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+
+from subprocess import check_output
+
+
+WARN_AT=80
+CRITICAL_AT=90
+output = []
+exitcode = 0
+
+for line in check_output(['/usr/sbin/zpool', 'list', '-Hpo', 'name,size,alloc']).decode().splitlines():
+    pool, size, alloc = line.split('\t')
+    used_percent = int(int(alloc)/int(size)*100)
+
+    if used_percent > CRITICAL_AT:
+        exitcode = max(exitcode, 2)
+    elif used_percent > WARN_AT:
+        exitcode = max(exitcode, 1)
+
+    if used_percent > WARN_AT:
+        output.append(
+            f'{pool} is {used_percent}% full'
+        )
+
+print('\n'.join(output))
+exit(exitcode)

bundles/zfs/items.py

@@ -14,6 +14,9 @@ files = {
                 for k, v in node.metadata.get('zfs/kernel_params').items()
         ) + '\n',
     },
+    '/usr/lib/nagios/plugins/check_zpool_space': {
+        'mode': '0755',
+    },
 }
 
 actions = {

bundles/zfs/metadata.py

@@ -34,6 +34,13 @@ defaults = {
             'zfs-auto-snapshot': {},
         },
     },
+    'monitoring': {
+        'services': {
+            'zpool space': {
+                'vars.command': f'/usr/lib/nagios/plugins/check_zpool_space',
+            },
+        },
+    },
     'systemd-timers': {
         'zfs-trim': {
             'command': '/usr/lib/zfs-linux/trim',