---
id: alpha-config
title: Alpha Configuration
---

:::warning
This page contains documentation for alpha features.
We reserve the right to make breaking changes to the features detailed within this page with no notice.

Options described in this page may be changed, removed, renamed or moved without prior warning.
Please beware of this before you use alpha configuration options.
:::

This page details a set of **alpha** configuration options in a new format.
Going forward we are intending to add structured configuration in YAML format to
replace the existing TOML based configuration file and flags.

Below is a reference for the structure of the configuration, with
[AlphaOptions](#alphaoptions) as the root of the configuration.

When using alpha configuration, your config file will look something like below:

```yaml
upstreams:
  - id: ...
    ...
injectRequestHeaders:
  - name: ...
    ...
injectResponseHeaders:
  - name: ...
    ...
```

Please browse the [reference](#configuration-reference) below for the structure
of the new configuration format.

## Using Alpha Configuration

To use the new **alpha** configuration, generate a YAML file based on the format
described in the [reference](#configuration-reference) below.

Provide the path to this file using the `--alpha-config` flag.

:::note
When using the `--alpha-config` flag, some options are no longer available.
See [removed options](#removed-options) below for more information.
:::

### Converting configuration to the new structure

Before adding the new `--alpha-config` option, start OAuth2 Proxy using the
`convert-config-to-alpha` flag to convert existing configuration to the new format.

```bash
oauth2-proxy --convert-config-to-alpha --config ./path/to/existing/config.cfg
```

This will convert any options supported by the new format to YAML and print the
new configuration to `STDOUT`.

Copy this to a new file, remove any options from your existing configuration
noted in [removed options](#removed-options) and then start OAuth2 Proxy using
the new config.

```bash
oauth2-proxy --alpha-config ./path/to/new/config.yaml --config ./path/to/existing/config.cfg
```

## Removed options

The following flags/options and their respective environment variables are no
longer available when using alpha configuration:

<!-- Legacy Upstream FlagSet -->
- `flush-interval`/`flush_interval`
- `pass-host-header`/`pass_host_header`
- `proxy-websockets`/`proxy_websockets`
- `ssl-upstream-insecure-skip-verify`/`ssl_upstream_insecure_skip_verify`
- `upstream`/`upstreams`

<!-- Legacy Headers FlagSet -->
- `pass-basic-auth`/`pass_basic_auth`
- `pass-access-token`/`pass_access_token`
- `pass-user-headers`/`pass_user_headers`
- `pass-authorization-header`/`pass_authorization_header`
- `set-basic-auth`/`set_basic_auth`
- `set-xauthrequest`/`set_xauthrequest`
- `set-authorization-header`/`set_authorization_header`
- `prefer-email-to-user`/`prefer_email_to_user`
- `basic-auth-password`/`basic_auth_password`
- `skip-auth-strip-headers`/`skip_auth_strip_headers`

Attempting to use these options via flags or via config when `--alpha-config`
set will result in an error.

:::important
You must remove these options before starting OAuth2 Proxy with `--alpha-config`
:::

## Configuration Reference
