mirror of
https://github.com/hwchase17/langchain
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36 lines
1.6 KiB
Markdown
36 lines
1.6 KiB
Markdown
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# Locally Hosted Setup
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This page contains instructions for installing and then setting up the environment to use the locally hosted version of tracing.
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## Installation
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1. Ensure you have Docker installed (see [Get Docker](https://docs.docker.com/get-docker/)) and that it’s running.
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2. Install the latest version of `langchain`: `pip install langchain` or `pip install langchain -U` to upgrade your
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existing version.
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3. Run `langchain-server`
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1. This will spin up the server in the terminal.
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2. Once you see the terminal
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output `langchain-langchain-frontend-1 | ➜ Local: [http://localhost:4173/](http://localhost:4173/)`, navigate
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to [http://localhost:4173/](http://localhost:4173/)
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4. You should see a page with your tracing sessions. See the overview page for a walkthrough of the UI.
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5. Currently, trace data is not guaranteed to be persisted between runs of `langchain-server`. If you want to
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persist your data, you can mount a volume to the Docker container. See the [Docker docs](https://docs.docker.com/storage/volumes/) for more info.
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6. To stop the server, press `Ctrl+C` in the terminal where you ran `langchain-server`.
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## Environment Setup
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After installation, you must now set up your environment to use tracing.
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This can be done by setting an environment variable in your terminal by running `export LANGCHAIN_HANDLER=langchain`.
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You can also do this by adding the below snippet to the top of every script. **IMPORTANT:** this must go at the VERY TOP of your script, before you import anything from `langchain`.
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```python
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import os
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os.environ["LANGCHAIN_HANDLER"] = "langchain"
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```
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