Conflicting Node.js DD_TRACE_AGENT_HOST / DD_AGENT_HOST documentation

[pinko-fowle]

Documentation Page

• https://docs.datadoghq.com/tracing/trace_collection/dd_libraries/nodejs?tab=containers
• https://docs.datadoghq.com/tracing/trace_collection/library_config/nodejs/

Issue Description

https://docs.datadoghq.com/tracing/trace_collection/dd_libraries/nodejs?tab=containers documents the use of DD_AGENT_HOST

meanwhile https://docs.datadoghq.com/tracing/trace_collection/library_config/nodejs/ and dd-trace-js's docs/API.md document the use of slightly different DD_TRACE_AGENT_HOST.

ideally the documentation for Node.js ought be consistent & comprehensive.

[pinko-fowle]

For reference, in dd-trace-js:

• https://github.com/DataDog/dd-trace-js/blob/94edef76f120389c5f31e0ff4d907342780aaab9/packages/dd-trace/src/profiling/config.js#L62 accepts only DD_AGENT_HOST
• https://github.com/DataDog/dd-trace-js/blob/94edef76f120389c5f31e0ff4d907342780aaab9/packages/dd-trace/src/config.js#L75-L76 accepts either DD_AGENT_HOST or DD_TRACE_AGENT_HOST.

[kayayarai]

Hi @pinko-fowle Thanks for raising this. I'll look into it