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The comments around hasJoined still described an authlib client that is not in the path. Velocity reads -Dmojang.sessionserver and sends the request itself, and it turns a 204 into its online-mode-only kick, not authlib's "failed to verify username". The route comment in api.go also offered "a thin login hook" as an alternative that does not exist. Other comments had drifted from the code: - The [[auth_source]] doc said an empty list ships the multiplexer off. Mojang is always prepended, so an empty list means Mojang is the only source. - The premium-name cache said Mojang does not recycle names. A name frees up when its owner renames away. The day-long "taken" TTL still holds, because a stale "taken" costs a third-party player only a prefix. - The cache bound claimed entries come only from players who authenticated somewhere. Any third-party source that validates a login adds one, so a hostile source can force the map to clear. That costs repeat lookups, or a fail-closed prefix while Mojang is unreachable, never an identity. The rewrite rationale now states what it costs a backend operator. A chat-session key that a third-party source signed over its native UUID cannot verify against the canonical UUID, so chat from those players can only be accepted unsigned. In the tests, comments that repeated their subtest names are gone.
Felis
A Kubernetes-driven Minecraft server hosting platform — one command to deploy, automatic lifecycle, backup, and security.
一款 Kubernetes 驱动的 Minecraft 服务器托管平台，一行命令部署，自动管理生命周期与安全。
Table of Contents
Features
- Wake on Join: Servers start automatically when a player connects, and stop when idle — like hibernate for your server.
- Web Dashboard: Monitor server status, online players, and resource usage from your browser, with backup and restore management.
- Auto Backup & Restore: Scheduled world backups with one-click rollback from any backup point.
- World Reaper: Worlds idle for more than 15 days are automatically backed up and removed to free disk space.
- Multi-core Support: Compatible with Paper, Fabric, Forge, and NeoForge, federated behind a Velocity proxy.
- Modpack Submission: Players submit custom modpacks; admin approval triggers automatic build and deployment.
- Passkey Login: Passwordless authentication via fingerprint, face recognition, or hardware security keys.
- Zero Trust Security: Panel traffic protected by Cloudflare Access; the internal API is never exposed to the internet.
Getting Started
On a prepared Linux host, run:
curl -fsSL https://raw.githubusercontent.com/MliroLirrorsIngenuity/Felis/main/deploy/bootstrap.sh | sudo bash
The script installs K3s, deploys the control plane, and launches a setup wizard. Once done, open your browser at the configured domain.
Build from Source
Felis is built with Go and Node.js:
# Backend (Go 1.26+)
go build -o felis ./cmd/felis
# Frontend (Node.js 22+)
cd panel
npm ci
npm run build
# Docker image
docker build -t felis:custom .
License
The source code is released under AGPL-3.0-only.
License Notes
- Derivative works are AGPL too: Any distribution of this project or of software derived from it must be released under AGPL-3.0 and must include the original copyright notice and license statement.
- Running it as a network service also triggers the source obligation (AGPL section 13): if you host a modified Felis for other people to use, you must offer those users the complete source of your modified version — even if you never distribute a binary. This is the one substantive difference between AGPL and GPL, and since Felis is a hosting platform reached over a network, it will essentially always apply.
- Disclaimer: This project is provided "as is", without warranty of any kind.
Acknowledgements
- Kubernetes: Container orchestration engine
- K3s: Lightweight Kubernetes distribution
- Cloudflare Zero Trust: Zero trust security infrastructure
- PostgreSQL: Data persistence
- React: User interface framework
- Vite: Frontend build tool
- TailwindCSS: CSS framework
- Bubble Tea: TUI framework
- Minecraft: What makes this all worthwhile