How to Add Custom Tags to All Spans in SkyWalking Java Agent Without Modifying Code?

[hzhaop]

Hi SkyWalking community,

I would like to know if there is a way to report a custom tag in all spans using the SkyWalking Java agent without modifying the application code.

For example, I want to add an environment name tag (indicating which environment the agent machine belongs to) to every span automatically. Is there a built-in configuration or extension mechanism to achieve this?

Thanks for your help!

[wu-sheng]

How is that possibility? If things go in this way, are you creating a new language?
If your rules are simple and straight forward, write a plugin.

[hzhaop]

@wu-sheng Thank you for your response. My tag value is fixed. Does that mean the only way to achieve this is by developing a custom plugin?

[wu-sheng]

If you mean everything is predicated, try this, https://skywalking.apache.org/docs/skywalking-java/latest/en/setup/service-agent/java-agent/customize-enhance-trace

Note, this is actually not different from writing codes.

And I think this will create an extra span.