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Gemfast

On the record

Authentication
Authentication can use local accounts, GitHub OAuth, or no authentication; GitHub OAuth access can be restricted by organization.github.com · read 11 Oct 2026
Binary platforms
The listed prebuilt binaries are linux_amd64, linux_arm64, and darwin_arm64.github.com · read 11 Oct 2026
Configuration
Gemfast is configured with an HCL file, whose location can be set with GEMFAST_CONFIG_FILE or a startup argument.github.com · read 11 Oct 2026
Dependencies
The project says the server does not require external dependencies such as PostgreSQL, Redis, or Memcached, and does not require Ruby to be installed on the server.github.com · read 11 Oct 2026
Distribution
The project provides a Docker image and precompiled binaries; listed release binaries are linux_amd64, linux_arm64, and darwin_arm64.github.com · read 11 Oct 2026
Gem filtering
It can allow or deny gems using regular expression rules or CVE severity data from ruby-advisory-db.github.com · read 11 Oct 2026
Gem mirroring
It can mirror and cache gems from rubygems.org and host internally developed gems.github.com · read 11 Oct 2026
Install methods
Gemfast is distributed as a Docker image and precompiled binaries, and can also be built from source.github.com · read 11 Oct 2026
Intended users
The project describes itself as intended for users who want a quick-to-set-up, easy-to-manage self-hosted RubyGems server.github.com · read 11 Oct 2026
License
Gemfast is open source software under the Apache 2.0 License.github.com · read 11 Oct 2026
Metrics
A Prometheus metrics endpoint is configurable and can be disabled.github.com · read 11 Oct 2026
Mirroring
Gemfast can mirror and cache gems from rubygems.org.github.com · read 11 Oct 2026
Private gems
Gemfast lets users upload internally developed gems that cannot be distributed publicly.github.com · read 11 Oct 2026
Purpose
Gemfast is a self-hosted RubyGems server written in Go and described as a drop-in replacement for geminabox.github.com · read 11 Oct 2026
RubyGems APIs
It supports the legacy Dependency API and the Compact Index API.github.com · read 11 Oct 2026
Self-hosting
The project is designed for users who want to self-host RubyGems.github.com · read 11 Oct 2026
Storage and dependencies
The project says it needs no external server dependencies such as PostgreSQL, Redis, or Memcached, and its configuration uses SQLite database files.github.com · read 11 Oct 2026
Web interface
Its basic UI is experimental and supports viewing and searching private gems and cached upstream gems.github.com · read 11 Oct 2026

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