> ## Documentation Index
> Fetch the complete documentation index at: https://langchain-5e9cc07a-preview-devupd-1765394015-eccef47.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Use environment variables for model providers

<Note>
  This feature is only available on Helm chart versions 0.10.27 (application version 0.10.74) and later.
</Note>

Many model providers support setting credentials and other configuration options through environment variables. This is useful for self-hosted deployments where you want to avoid hardcoding sensitive information in your code or configuration files. In LangSmith, most model interactions are done through the `playground` service, which allows you to configure many of those environment variables directly on the pod itself. This can be useful to avoid having to set credentials in the UI.

## Requirements

* A self-hosted LangSmith instance with the `playground` service running.
* The provider you want to configure must support environment variables for configuration. Check the provider's Chat Model [documentation](https://python.langchain.com/docs/integrations/providers/) for more information.
* The secrets/roles you may want to attach to the `playground` service.
  * Note that for IRSA you may need to grant the `langsmith-playground` service account the necessary permissions to access the secrets or roles in your cloud provider.

## Configuration

With the parameters from above, you can configure your LangSmith instance to use environment variables for model providers. You can do this by modifying the `langsmith_config.yaml` file for your LangSmith Helm Chart installation or the `docker-compose.yaml` file for your Docker installation.

<CodeGroup>
  ```yaml Helm theme={null}
  playground:
    deployment:
      extraEnv:
        - name: OPENAI_BASE_URL
          value: https://<my_proxy_url>
        - name: OPENAI_API_KEY
          valueFrom:
            secretKeyRef:
              name: <your_secret_name>
              key: api_key
    serviceAccount: # Can be useful if you want to use IRSA or workload identity
      annotations:
        eks.amazonaws.com/role-arn: <your_role_arn>
  ```

  ```yaml Docker theme={null}
  # In your docker-compose.yaml file
  langchain-playground:
    environment:
      .. # Other environment variables
      - OPENAI_BASE_URL=https://<my_proxy_url>
      - OPENAI_API_KEY=<your_key> # This will be set in the .env file
  ```
</CodeGroup>

***

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  [Edit the source of this page on GitHub.](https://github.com/langchain-ai/docs/edit/main/src/langsmith/self-host-playground-environment-settings.mdx)
</Callout>

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