61 lines
2.5 KiB
Markdown
61 lines
2.5 KiB
Markdown
# OpenWebUI
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OpenWebUI is a self-hosted chat interface for LLMs. It connects to OpenAI-compatible endpoints, Ollama, llama.cpp, and vLLM, and adds RAG, plugins, tool calling, and multi-user support.
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**Host:** Dankclaw — **Hostname:** `chat.dankclaw.local` — **Port:** 3000 — **Docs:** https://github.com/open-webui/open-webui
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## Facts (from research, primary source)
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| Item | Value |
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|------|-------|
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| Image | `ghcr.io/open-webui/open-webui:main` (CPU build for non-NVIDIA hosts) |
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| Port | 3000 (host) → 8080 (container) |
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| Data volume | config, sessions, RAG indexes |
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| Backend | OpenAI-compatible endpoint at `http://192.168.0.235:7770/v1` — llama.cpp FastMTP on Dankserver (`frank-default-large`, Qwen3.8-27B IQ4_XS, 128K ctx) |
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> Note: the `:cuda` image tag was previously used on Dankserver. Dankclaw is AMD; use the default (CPU) image, NOT the cuda tag.
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## Connecting to llama.cpp
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OpenWebUI talks to the llama.cpp server on Dankserver through its OpenAI-compatible API. Configure a new connection in the UI or set the base URL:
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```yaml
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environment:
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OPENAI_API_BASE_URL: "http://192.168.0.235:7770/v1"
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OPENAI_API_KEY: "none"
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```
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The endpoint moved from Dankclaw to Dankserver in the 2026-08-17 redo; use the LAN address, not `host.containers.internal` (which only reaches the podman host).
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> The `:7770` endpoint is the `frank-default-large` service on Dankserver,
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> managed by the sibling `vllmScripts` repository (not this repo). Model
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> swaps, context sizing, and spec tuning happen there. See the
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> [vllmScripts knowledge base](../../vllmScripts/docs/index.md).
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>
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> Alternative backend: `frank-default-small` on port 52625 (vLLM on
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> Dankclaw, nameistoken Qwen3.6-35B-A3B Quark W8A8 INT8, 262K ctx,
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> tool calling). Same OpenAI-compatible API shape. Point
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> `OPENAI_API_BASE_URL` at `http://192.168.0.143:52625/v1`.
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## Volumes
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| Container path | Host path (convention) |
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|----------------|------------------------|
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| `/app/backend/data` | `/opt/openwebui/data` |
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## Healthcheck
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OpenWebUI responds on `/health` with 200.
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## Gotchas
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- Use the non-CUDA image on AMD hosts.
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- The default admin account is created on first login; secure it immediately.
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- If the backend (llama.cpp) is slow to load, OpenWebUI may show connection errors until the model is ready — that matches the known 3–8 minute model load time.
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## See Also
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- [[Dankclaw Stack]]
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- [[Hermes]] — the agent OpenWebUI can talk to
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- [vllmScripts knowledge base](../../vllmScripts/docs/index.md) — the llama.cpp FastMTP and vLLM endpoints (Dankserver :7770, Dankclaw :52625)
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