Ralph

What it does

Access controls

Ralph can restrict statement access by authority and limit endpoints or functionality with user scopes; both controls are disabled by default.checked 4 Oct 2001

Authentication

The API server supports HTTP Basic authentication and OpenID Connect on top of OAuth 2.0, and either or both can be enabled.checked 4 Oct 2001

Data backends

Ralph LRS supports Elasticsearch, MongoDB, and ClickHouse databases.checked 4 Oct 2001

Data conversion

The CLI can convert OpenEdX events to xAPI statements, but conversion is supported only for a set of OpenEdX events.checked 4 Oct 2001

Distribution and license

Ralph is distributed as a Python package and Docker image and is released under the MIT License.checked 4 Oct 2001

Intended audience

The project describes itself as community-driven and invites people to contribute questions, design feedback, issues, and code changes.checked 4 Oct 2001

Known API gaps

The API documentation marks statement attachments, several filters, and some response formats as not implemented.checked 4 Oct 2001

Monitoring

Ralph provides Sentry integration to monitor its LRS server and CLI.checked 4 Oct 2001

Other integrations

The library documents backends for OVH Log Data Platform, OpenStack Swift, Amazon S3, filesystems, other LRS systems, and WebSockets.checked 4 Oct 2001

Purpose

Ralph is a learning analytics toolbox available as an LRS HTTP API server, a command-line interface, and a library.checked 4 Oct 2001

Statement forwarding

The LRS can forward received xAPI statements to other LRS servers, with configurable retries and timeouts.checked 4 Oct 2001

xAPI support

Ralph follows xAPI specification version 1.0.3 and does not currently support xAPI 2.0.checked 4 Oct 2001