stands for HaProxy Reversed Proxy . It is a specialized reverse proxy system developed specifically for the Nextcloud AppAPI, acting as a bridge between the Nextcloud server and the external apps (ExApps) that run as containerized microservices.
Alternatively, you can add the HaRP service to your docker-compose.yml manually – but note that it will not be managed by the AIO mastercontainer if you do so.
If you’re using the Nextcloud All‑in‑One (AIO) Docker deployment, there is a catch: . The official AIO maintainers are working on adding HaRP support (via PR #7493), but as of late 2025, you still need to add it manually. harp nextcloud
Clients communicate with ExApps via HaRP, which sits behind your main reverse proxy (e.g., Nginx or Apache). FRP-Based Transport: Inside each ExApp container, an FRPC client initiates an outbound connection to the HaRP server. Authentication:
HaRP is designed to be highly flexible and can be installed alongside Nextcloud or on a separate host. Typical Deployment Steps stands for HaProxy Reversed Proxy
Since ExApps run as separate containerized microservices, you can write them in that can speak HTTP and/or WebSockets. Python, Node.js, Go, Rust – whatever your team knows best. AppAPI handles the lifecycle and integration, while HaRP handles the routing.
Before HaRP, ExApps struggled with real-time features. HaRP allows end-to-end WebSocket connections for live chats, collaborative editing, and dashboards. If you’re using the Nextcloud All‑in‑One (AIO) Docker
HaRP uses FRP (Fast Reverse Proxy) to construct automated, encrypted TLS tunnels directly between itself and the ExApps. ExApp containers or reside on the public web; they communicate privately through HaRP's local abstraction layer. 4. Enterprise-Grade Security Built-In
In the basement of the Musée des Arts et Métiers in Paris, behind a reinforced door that once protected wartime gold, sat a server rack that neither hummed nor glowed. It was old—ten years, at least—and its fans had seized up long ago. To the museum’s IT staff, it was a relic. But to Dr. Elara Vance, a digital archaeologist, it was a time capsule.
A single HaRP instance can manage multiple Docker engines, making it ideal for complex or distributed infrastructures.