Below is my analysis. It basically is a breakdown of what homework I've done. I agree that 'device' should reference the device info.
Well, the code in MySqlSendEvent.py contains the following, which looks to me like it should set 'device' to the device object which generated the event. The code in applyDeviceContext() below shows the device object's context being referenced.
# Look for the device by name, then IP 'globally'
# and then from the /Network class
device = None
if getattr(evt, 'device', None):
device = devices.findDevice(evt.device)
if not device and getattr(evt, 'ipAddress', None):
device = devices.findDevice(evt.ipAddress)
if not device and getattr(evt, 'device', None):
device = self._findByIp(evt.device, networks)
if not device and getattr(evt, 'ipAddress', None):
device = self._findByIp(evt.ipAddress, networks)
if device:
evt.device = device.id
log.debug("Found device %s and adding device-specific"
" data", evt.device)
evt = self.applyDeviceContext(device, evt)
evtclass = events.lookup(evt, device)
if evtclass:
evt = evtclass.applyExtraction(evt)
evt = evtclass.applyValues(evt)
evt = evtclass.applyTransform(evt, device)
if evt._action == "drop":
log.debug("Dropping event")
return None
return evt
def applyDeviceContext(self, device, evt):
"""
Apply event attributes from device context.
@param device: device from DMD
@type device: device object
@param evt: event
@type evt: Event class
@return: updated event
@rtype: Event class
"""
if not hasattr(evt, 'ipAddress'): evt.ipAddress = device.manageIp
evt.prodState = device.productionState
evt.Location = device.getLocationName()
evt.DeviceClass = device.getDeviceClassName()
evt.DeviceGroups = "|"+"|".join(device.getDeviceGroupNames())
evt.Systems = "|"+"|".join(device.getSystemNames())
evt.DevicePriority = device.getPriority()
return evt
But when I try it from within this transform:
devname = evt.device
intname = evt.component
dev = device
for iface in dev.os.interfaces.objectItems():
if iface[1].name() == intname:
descr = iface[1].description
summary = 'DOWN: %s\t%s\t(%s)' % (devname, intname, descr)
evt.summary = summary
it generates the following error:
2010-05-17 17:06:05,352 INFO zen.ZenHub: Worker reports 2010-05-17 17:06:05,351 ERROR zen.Events: Error processing transform/mapping on Event Class /zport/dmd/Events/Net/Link/instances/LINK-3-UPDOWN
Traceback (most recent call last):
File "/opt/zenoss/zenoss/Products/ZenEvents/EventClassInst.py", line 96, in applyTransform
exec(eventclass.transform, variables_and_funcs)
File "<string>", line 4, in ?
AttributeError: 'NoneType' object has no attribute 'os'
I'm interpreting this as 'device' is a 'NoneType' object (line 4 is "for iface in dev.os.interfaces.objectItems():") .
I enabled debugging to make sure that no other transforms were being applied in the class path to this transform. This is the only match.
I'm running out of things to try. It just doesn't make sense to me, though I'm just learning Python, so there's a very good probability that I'm missing something subtle in the language.
