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Extension 2.0 - where does the logic go?


Could someone please help explain where the code goes for Extension 2.0? 


I've played with OneAgent and ActiveGate extensions by writing my own Python code that runs every 1 minute.  I understand a fair amount about Extensions 2.0 YAML, JSON, and ZIP thanks to this great blog post (  and help site ( ).


But, I can't seem to figure out where I place the logic that knows what to do with the YAML and JSON configuration data to obtain metrics or perform some logic on data to produce a metric. Is maybe Extensions 2.0 not a replacement for what we can currently do with ActiveGate and OneAgent extensions?


Dynatrace Pro
Dynatrace Pro


Coded extensions and local extensions in the 2.0 framework is planned for the future. For now it's only possible to gather data using the declarative YAML format, for example for SNMP polling.



  Thank you for the reply.   Looking forward to the coded extensions.  We're playing with the SNMP extension right now and it's really cool.  The best part is whoever developed it I feel was really thinking about all the different scenarios a client might have and thus made the SNMP extension quite flexible.  I can't image the complexity of code behind it.

Not applicable

Hey, quick question.


How did you get the new SNMP Extension? 

NVM i just found the docs.


Hi @Mike_L  hope you are good.

Do you know if there is a rough eta for coded plugins?



The current plan is next year.



Dynatrace Pro
Dynatrace Pro

@Jan_W is responsible for the framework and @dglugla for the SNMP implementation. I'm sure that they're happy to hear about your experience.


Hi @Jan_W and  @dglugla,

My experience has been to enable SNMP extension 2.0 and also create an extension for Linux host based on the structure I had of the SNMP yaml, with host related metrics.

Both extensions are up and running, after a rather complicated signing process for custom extension. This is an issue to improve or simplify as it is very cumbersome.

My question is about the promise that extension 2.0 provides "metrics with topology". When I read topology I immediately relate it to entities displayed in the smartscape. But so far I do not see any results in that sense or a Host monitored with SNMP in the smartscape.

In the structure of the extension at the end comes the Topology and Relationships section where I have that the network interfaces are children of the SNMP device (Host). Could you explain to me what would be the scope of these metrics with topology. I imagine a scenario where I monitor a Switch, and establish a relationship between a switch interface and a Host. If that interface throws errors, it could generate a Problem that would impact that Host.


I had the same thought as you when i saw Topology.


I too am ultimately interested in the same.  First just so I can relate switches to routers and such so that the network topology is clear. But yes, the best state would be to link the switch interface to a host. 


Hopefully DT will come back with a response.