Langserve license issue

[eero-t]

Langserve is used in:

$ git grep -i langserve
comps/llms/summarization/tgi/llm.py:from langserve.serialization import WellKnownLCSerializer
comps/llms/summarization/tgi/requirements.txt:langserve
comps/llms/text-generation/ollama/requirements.txt:langserve
comps/llms/text-generation/ray_serve/requirements.txt:langserve
comps/llms/text-generation/tgi/requirements.txt:langserve
comps/llms/text-generation/vllm/requirements.txt:langserve
comps/ragas/tgi/requirements.txt:langserve

However, langserve license: https://github.com/langchain-ai/langserve/blob/main/LICENSE

contains limitation which seems to make it unfit for implementing cloud applications:

You may not provide the software to third parties as a hosted or managed service, where the service provides users with access to any substantial set of the features or functionality of the software.

If it's not possible to use a component that allows implementing cloud services (provided to 3rd parties) based on it, at least there should IMHO be:

• A very prominent warnings in the documentation about this license limitation, and/or
• Code requiring user to accept such licenses e.g. when images are built
  • Something like dialog could be used to query that: https://linux.die.net/man/1/dialog

PS. "LangAIExamples" repo also includes references to langserve, but happily all those files are deprecated.

[feng-intel]

Thanks. I will report this license issue.

[eero-t]

Moving dependency installation from build time to container startup: https://github.com/opea-project/GenAIComps/pull/274/files

Does not change anything license-wise for the companies that would be using OPEA services. The component is still there when the service is used.

Runtime installation just slows down service startup, and makes legal obligations harder to analyze / more surprising.