report power consumption with dell

netbox_agent/power.py

@@ -8,11 +8,11 @@ PSU_DMI_TYPE = 39
 class PowerSupply():
     def __init__(self, server=None):
         self.server = server
-        netbox_server = self.server.get_netbox_server()
+        self.netbox_server = self.server.get_netbox_server()
         if self.server.is_blade():
-            self.device_id = netbox_server.parent_device.id if netbox_server else None
+            self.device_id = self.netbox_server.parent_device.id if self.netbox_server else None
         else:
-            self.device_id = netbox_server.id if netbox_server else None
+            self.device_id = self.netbox_server.id if self.netbox_server else None
 
     def get_power_supply(self):
         power_supply = []
@@ -81,3 +81,31 @@ class PowerSupply():
                     )
 
         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

netbox_agent/server.py

@@ -108,6 +108,9 @@ class ServerBase():
     def get_bios_release_date(self):
         raise NotImplementedError
 
+    def get_power_consumption(self):
+        raise NotImplementedError
+
     def _netbox_create_blade_chassis(self, datacenter, rack):
         device_type = nb.dcim.device_types.get(
             model=self.get_chassis(),
@@ -322,6 +325,7 @@ class ServerBase():
         if config.update_all or config.update_psu:
             self.power = PowerSupply(server=self)
             self.power.create_or_update_power_supply()
+            self.power.report_power_consumption()
         if update:
             server.save()
         logging.debug('Finished updating Server!')

netbox_agent/vendors/dell.py

@@ -1,4 +1,8 @@
+import logging
+import subprocess
+
 from netbox_agent.server import ServerBase
+from netbox_agent.misc import is_tool
 
 
 class DellHost(ServerBase):
@@ -33,3 +37,33 @@ class DellHost(ServerBase):
         if self.is_blade():
             return self.dmi.get_by_type('Chassis')[0]['Serial Number']
         return self.get_service_tag()
+
+    def get_power_consumption(self):
+        '''
+        Parse omreport output like this
+
+        Amperage
+        PS1 Current 1 : 1.8 A
+        PS2 Current 2 : 1.4 A
+        '''
+        value = []
+
+        if not is_tool('omreport'):
+            logging.error('omreport does not seem to be installed, please debug')
+            return value
+
+        data = subprocess.getoutput('omreport chassis pwrmonitoring')
+        amperage = False
+        for line in data.splitlines():
+            if line.startswith('Amperage'):
+                amperage = True
+                continue
+
+            if amperage:
+                if line.startswith('PS'):
+                    amp_value = line.split(':')[1].split()[0]
+                    value.append(amp_value)
+                else:
+                    break
+
+        return value