add check disk usage

checks/check_api_swarmpit.py

@@ -123,6 +123,26 @@ class DockerSwarmMemoryResource(nagiosplugin.Resource):
         return nagiosplugin.Metric(name='memory', value=memory_usage_percent, uom='%', context='scalar_context')
 
 
+#
+# Check Swarm disk
+#
+class DockerSwarmDiskResource(nagiosplugin.Resource):
+    def __init__(self, api) -> None:
+        self.api = api
+
+    def probe(self) -> list:
+        """check disk usage of full swarm
+        
+        Returns:
+            nagiosplugin.Metric: single metric element (return)
+        """
+        data = self.api.statistics()
+        disk = data['disk']
+        disk_usage_percent = round(disk['usage'], 2)
+
+        return nagiosplugin.Metric(name='disk', value=disk_usage_percent, uom='%', context='scalar_context')
+
+
 #
 # Check Swarm services
 #
@@ -277,6 +297,7 @@ def parse_args() -> argparse.Namespace:
         choices=[
             'load',
             'memory',
+            'disk',
             'service_states',
             'service_updates'
         ],
@@ -322,6 +343,12 @@ def main():
                 nagiosplugin.ScalarContext(name='scalar_context', warning=args.warning, critical=args.critical),
                 nagiosplugin.Summary())
             check.name = "swarm memory"
+        case 'disk':
+            check = nagiosplugin.Check(
+                DockerSwarmDiskResource(api=api),
+                nagiosplugin.ScalarContext(name='scalar_context', warning=args.warning, critical=args.critical),
+                nagiosplugin.Summary())
+            check.name = "swarm disk"
         case 'service_states':
             check = nagiosplugin.Check(
                 DockerSwarmServiceStatesResource(api=api),