STEP1. システム前提 #

• Ubuntu 24.04
• Docker, Docker Compose
• ドメイン（例：test.bestnetllc.co.jp）
• Let’s Encrypt SSL証明書

STEP2. OSとDockerのインストール #

OSのアップデート #

sudo apt-get update
sudo apt-get upgrade -y
sudo apt-get autoremove -y
sudo apt-get autoclean
sudo reboot

DockerとDocker Composeインストール #

sudo apt-get update
sudo apt-get install -y \
  ca-certificates \
  curl \
  gnupg \
  lsb-release

curl -fsSL https://download.docker.com/linux/ubuntu/gpg \
  | sudo gpg --dearmor -o /usr/share/keyrings/docker.gpg

echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker.gpg] \
  https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" \
  | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

sudo apt-get update
sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

docker --version
docker compose version

STEP3. SSL証明書の初回発行 #

保存ディレクトリを作成 #

sudo mkdir -p /opt/certs/letsencrypt

一時的にNginxを停止し、証明書発行 #

sudo docker run -it --rm \
  -p 80:80 \
  -v /opt/certs/letsencrypt:/etc/letsencrypt \
  certbot/certbot certonly --standalone \
  -d test.bestnetllc.co.jp \
  -m test@bestnetllc.co.jp \
  --agree-tos \
  --no-eff-email

成功を確認:

ls /opt/certs/letsencrypt/live/test.bestnetllc.co.jp

STEP4. Difyのインストールと設定 #

リポジトリ取得 #

cd /home
mkdir dify && cd dify
git clone https://github.com/langgenius/dify.git
cd dify/docker

.envの設定 #

nano .env

環境変数の例:

CERTBOT_EMAIL=test@bestnetllc.co.jp
CERTBOT_DOMAIN=test.bestnetllc.co.jp

NGINX_HTTPS_ENABLED=true
NGINX_SSL_PROTOCOLS="TLSv1.2 TLSv1.3"
NGINX_SSL_CERT_FILENAME=live/test.bestnetllc.co.jp/fullchain.pem
NGINX_SSL_CERT_KEY_FILENAME=live/test.bestnetllc.co.jp/privkey.pem

docker-compose.yamlのNginx設定例 #

services:
  nginx:
    image: nginx:latest
    restart: always
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - type: bind
        source: /opt/certs/letsencrypt
        target: /etc/letsencrypt
        read_only: true
      - ./nginx/nginx.conf.template:/etc/nginx/nginx.conf.template
      - ./nginx/conf.d:/etc/nginx/conf.d
    environment:
      NGINX_HTTPS_ENABLED: "true"
      NGINX_SSL_CERT_FILENAME: "live/test.bestnetllc.co.jp/fullchain.pem"
      NGINX_SSL_CERT_KEY_FILENAME: "live/test.bestnetllc.co.jp/privkey.pem"
      NGINX_SSL_PROTOCOLS: "TLSv1.2 TLSv1.3"

起動と動作確認 #

docker compose up -d
docker compose logs -f nginx

ブラウザで https://test.bestnetllc.co.jp にアクセス

STEP5. SSL証明書の自動更新設定 #

更新スクリプトを作成 #

sudo nano /opt/certs/renew_cert.sh

スクリプト内容:

#!/bin/bash

cd /home/dify/docker
docker compose stop nginx

docker run --rm \
  -p 80:80 \
  -v /opt/certs/letsencrypt:/etc/letsencrypt \
  certbot/certbot renew --standalone

docker compose start nginx

sudo chmod +x /opt/certs/renew_cert.sh

cronジョブ設定 #

sudo crontab -e

以下を追加（毎週日曜午前3時）:

0 3 * * 0 /opt/certs/renew_cert.sh >> /var/log/letsencrypt_renew.log 2>&1

動作テスト #

sudo /opt/certs/renew_cert.sh

STEP6. トラブルシューティング #

問題発生時はログを確認:

docker compose logs api -f
docker compose logs worker -f
docker compose logs web -f
docker compose logs nginx -f

Internal Server