Add power supply support (#56)

netbox_agent/power.py

@@ -0,0 +1,111 @@
+import logging
+
+from netbox_agent.config import netbox_instance as nb
+
+PSU_DMI_TYPE = 39
+
+
+class PowerSupply():
+    def __init__(self, server=None):
+        self.server = server
+        self.netbox_server = self.server.get_netbox_server()
+        if self.server.is_blade():
+            self.device_id = self.netbox_server.parent_device.id if self.netbox_server else None
+        else:
+            self.device_id = self.netbox_server.id if self.netbox_server else None
+
+    def get_power_supply(self):
+        power_supply = []
+        for psu in self.server.dmi.get_by_type(PSU_DMI_TYPE):
+            if 'Present' not in psu['Status']:
+                continue
+
+            max_power = psu.get('Max Power Capacity').split()[0]
+            desc = '{} - {}'.format(
+                psu.get('Manufacturer', 'No Manufacturer').strip(),
+                psu.get('Name', 'No name').strip(),
+            )
+            power_supply.append({
+                'name': psu.get('Serial Number', 'No S/N').strip(),
+                'description': desc,
+                'allocated_draw': None,
+                'maximum_draw': int(max_power),
+                'device': self.device_id,
+                })
+        return power_supply
+
+    def get_netbox_power_supply(self):
+        return nb.dcim.power_ports.filter(
+            device_id=self.device_id
+            )
+
+    def create_or_update_power_supply(self):
+        nb_psus = self.get_netbox_power_supply()
+        psus = self.get_power_supply()
+
+        # Delete unknown PSU
+        delete = False
+        for nb_psu in nb_psus:
+            if nb_psu.name not in [x['name'] for x in psus]:
+                logging.info('Deleting unknown locally PSU {name}'.format(
+                    name=nb_psu.name
+                ))
+                nb_psu.delete()
+                delete = True
+
+        if delete:
+            nb_psus = self.get_netbox_power_supply()
+
+        # sync existing Netbox PSU with local infos
+        for nb_psu in nb_psus:
+            local_psu = next(
+                item for item in psus if item['name'] == nb_psu.name
+            )
+            update = False
+            if nb_psu.description != local_psu['description']:
+                update = True
+                nb_psu.description = local_psu['description']
+            if nb_psu.maximum_draw != local_psu['maximum_draw']:
+                update = True
+                nb_psu.maximum_draw = local_psu['maximum_draw']
+            if update:
+                nb_psu.save()
+
+        for psu in psus:
+            if psu['name'] not in [x.name for x in nb_psus]:
+                logging.info('Creating PSU {name} ({description}), {maximum_draw}W'.format(
+                    **psu
+                    ))
+                nb_psu = nb.dcim.power_ports.create(
+                    **psu
+                    )
+
+        return True
+
+    def report_power_consumption(self):
+        psu_cons = self.server.get_power_consumption()
+        nb_psus = self.get_netbox_power_supply()
+
+        if not len(nb_psus) or not len(psu_cons):
+            return False
+
+        # find power feeds for rack or dc
+        voltage = None
+        pwr_feeds = None
+        if self.netbox_server.rack:
+            pwr_feeds = nb.dcim.power_feeds.filter(
+                rack=self.netbox_server.rack.id
+            )
+        if pwr_feeds is None or not len(pwr_feeds):
+            logging.info('Could not find power feeds for Rack, defaulting value to 230')
+            voltage = 230
+
+        for i, nb_psu in enumerate(nb_psus):
+            nb_psu.allocated_draw = float(psu_cons[i]) * voltage
+            nb_psu.save()
+            logging.info('Updated power consumption for PSU {}: {}W'.format(
+                nb_psu.name,
+                nb_psu.allocated_draw,
+            ))
+
+        return True