Creating target instance for custom plug-in

Question

I must be missing something basic. How do I get EM to include the target types from my custom plug-in in the list of target instances that can be added?
I'm using OEM 10g Grid Control Release 10.2.0.1.0. I have successfully imported and deployed a simple test plug-in to one agent, but when I go to the Targets area, the new target type is nowhere to be found. Do I need to do something in addition to importing and deploying the plug-in?

Answer 1

You ran 'emctl stop oms;emctl start oms' or 'emctl
stop agent; emctl start agent'? You'll want to make
sure that you're restarting the OMS.Yes, my bad, I intended to write "emctl stop oms; emctl start oms"
Actually, it might not be a bad idea to restart the
agent. Deployment should have reloaded the agent's
metadata, but you can restart the agent to see if
that helps. Just because the files are there doesn't
mean that the agent has picked them up.I did that too. No difference.
Confirm that MGMT$TARGET_TYPE shows the metrics
associated with your target type.Okay, here we may have something. My custom target type is not in MGMT$TARGET_TYPE. I log in to Oracle as SYSMAN and look at this table, and I can see the standard ones, but it does not appear to list all target types available from the Add pulldown on the Agent page. This table has both a TARGET_TYPE and a TARGET_NAME column, and it appears to only list created target instances because all rows have values for both columns.
The most basic requirement for all target types is a
Response metric with a Status column, so make sure
you have one of those (and a corresponding collection
file entry).Yes, that's all I have as a matter of fact. Maybe my sample target is too simple? Here's the complete metadata XML file:
<!DOCTYPE TargetMetadata SYSTEM "../dtds/TargetMetadata.dtd">
<TargetMetadata META_VER="0.2" TYPE="echo">
  <Display>
    <Label NLSID="my_name">Echo</Label>
  </Display>
  <Metric NAME="Response" TYPE="TABLE">
    <Display>
      <Label NLSID="my_resp">Response</Label>
    </Display>
    <TableDescriptor>
      <ColumnDescriptor NAME="Status" TYPE="STRING" IS_KEY="FALSE">
        <Display>
          <Label NLSID="my_resp_Status">Status</Label>
        </Display>
      </ColumnDescriptor>
    </TableDescriptor>
    <QueryDescriptor FETCHLET_ID="OSLineToken">
      <Property NAME="echo_text" SCOPE="INSTANCE">Hello World!</Property>
      <Property NAME="command" SCOPE="GLOBAL">
         echo begin %echo_text% end
      </Property>
      <Property NAME="startsWith" SCOPE="GLOBAL">begin</Property>
      <Property NAME="delimiter" SCOPE="GLOBAL">end</Property>
    </QueryDescriptor>
  </Metric>
   <InstanceProperties>
    <InstanceProperty NAME="echo_text" CREDENTIAL="FALSE" OPTIONAL="FALSE">
      <Display>
        <Label NLSID="echo_text_iprop">Text to echo</Label>
      </Display>
    </InstanceProperty>
  </InstanceProperties>
</TargetMetadata>And here's the complete collections XML:
<TargetCollection TYPE="echo" >
  <CollectionItem NAME = "Response">
     <Schedule>
        <IntervalSchedule INTERVAL = "5" TIME_UNIT = "Min"/>
     </Schedule>
     <MetricColl NAME="Response">
     <Condition COLUMN_NAME="Status" CRITICAL="0" OPERATOR="EQ" OCCURRENCES="foo"/>
     </MetricColl>
  </CollectionItem>
</TargetCollection>According to "emctl ilint", it's valid. I do get an INFO message about "No CATEGORY_PROPERTIES specified for metatdata", but that sounds harmless to me.
On your agent homepage, is the data current, or does
it look like there is some disconnect between agent
and OMS?It seems to be up-to-date. All timestamps are current and the list of Monitored Targets is accurate, even after I removed one of the targets.
And when you try to add your target instance, you're
going to the Monitored Targets section in the middle
of the page and using the Add pulldown on the right
hand side above the table?Yes.
I appreciate any additional ideas you may have.