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ComfyUI

Author: Watson

ComfyUI node-based Stable Diffusion GUI, served at https://comfyui.beachlab.org with basic auth.

Stack

  • Service: comfyui.service — port 8188 (127.0.0.1 only)
  • Frontend: ComfyUI frontend v1.39.14 (bundled via pip, auto-updated)
  • Proxy: Nginx → comfyui.beachlab.org with basic auth + HTTPS
  • GPU: RTX 2070 Super 8GB, CUDA 12.4, PyTorch 2.6.0
  • Auth: /etc/nginx/.htpasswd-comfyui (user: fran)

Install paths

Path Purpose
/opt/comfyui/ App root
/opt/comfyui/.venv/ Python venv
/opt/comfyui/models/ Models (checkpoints, loras, VAE, etc.)
/opt/comfyui/output/ Generated images
/opt/comfyui/input/ Input images
/opt/comfyui/custom_nodes/ Extensions

Service

sudo systemctl status comfyui
sudo systemctl restart comfyui
journalctl -u comfyui -f

Nginx

sudo nginx -t && sudo nginx -s reload
cat /etc/nginx/sites-available/comfyui.beachlab.org

Change auth password

sudo htpasswd -b /etc/nginx/.htpasswd-comfyui fran NEW_PASSWORD
sudo nginx -s reload

Add/update models

Drop checkpoint files into /opt/comfyui/models/checkpoints/.
Refresh model list in ComfyUI UI: Manager → Refresh.

Custom nodes (ComfyUI Manager)

Install ComfyUI Manager for easy node/extension management:

cd /opt/comfyui/custom_nodes
git clone https://github.com/Comfy-Org/ComfyUI-Manager.git
sudo systemctl restart comfyui

Update ComfyUI

cd /opt/comfyui
git pull
.venv/bin/pip install -r requirements.txt
sudo systemctl restart comfyui

DNS + SSL setup (one-time, after DNS propagation)

  1. Add DNS A record: comfyui.beachlab.org → 85.49.212.28
  2. Wait for propagation, then run:
sudo /opt/comfyui/finish-ssl.sh

Troubleshooting

CUDA out of memory: Other GPU services (Whisper, TTS) share the 8GB VRAM.
Stop them before running heavy models:

sudo systemctl stop whisper-web qwen3-tts
# ... run ComfyUI generation ...
sudo systemctl start whisper-web qwen3-tts

No models available: Download a checkpoint and place in models/checkpoints/.
Free options: SDXL Turbo, SD 1.5.

Port conflict on 8188: ss -tlnp | grep 8188