[Feature]: Improve LiteLLM Proxy Debug / Verbose Logs

[ishaan-jaff]

The Feature

Goal

• I needed to ONLY see the original request, if 1 request failed why it failed (timeoutError), the next model it was falling back too

“LiteLLM verbose logs are not human readable “

Motivation, pitch

proxy user feedback

Twitter / LinkedIn details

No response

[shuther]

I am using litellm in proxy mode and when I try:
litellm --logs as per https://litellm.vercel.app/docs/proxy_server
I am getting the error message:

Usage: litellm [OPTIONS]
Try 'litellm --help' for help.

Error: No such option: --logs (Possible options: --alias, --host, --local)

Is it still supported? Also there is no file api_logs.json in the current directory (while I do have errors showing up in the console)

[ishaan-jaff]

this is deprecated @shuther it's on the old proxy docs. Are you just trying to view LLM input / output logs?

You can use our Langfuse calback https://litellm.vercel.app/docs/proxy/logging#logging-proxy-inputoutput---langfuse

[shuther]

I am not sure that langfuse is solving the log problem; I want to capture DEBUG/INFO messages, not always prompt.
i.e. For test purposes, I setup langfuse with self hosting, and litellm hanged because the connection to the docker did not work (we could simulate network issue to the langfuse cloud offer). I think it is still important to copy some logs to a file ?
For langfuse, I am not sure if this call could happen in the background so it does not block the reply to the user?

[shuther]

Also, do you support the environment variable LANGFUSE_HOST, I am getting some errors but I would like to confirm before I submit a bug report?

[krrishdholakia]

Yes we do support LANGFUSE_HOST @shuther