安裝 ovpn-admin (OpenVPN + 簡易 WebUI) 方案

這是本文件的舊版！

雖然已找到 DockOVPN (OpenVPN Docker方案), 但還是希望能找到有 WebUI 可方便管理 VPN 帳號的方案
安裝環境
- VM : 2 vCore, 2G RAM, 32G SSD
- OS : Alpine 3.19 + Docker Compose
規劃環境
- OpenVPN 內部網路 : 10.16.0.0/24
- 外部聯入 VPN : vpn.mydomain.com TCP Port 443

Alpine 3.19 Kernel 啟用 ip_tables

modprobe ip_tables
echo 'ip_tables' >> /etc/modules
reboot

編輯 docker-compose.yml

services:
  openvpn:
    container_name: openvpn
    image: flant/ovpn-admin:openvpn-latest
    command: /etc/openvpn/setup/configure.sh
    environment:
      OVPN_SERVER_NET: "10.16.0.0"
      OVPN_SERVER_MASK: "255.255.255.0"
      OVPN_PASSWD_AUTH: "true"
    cap_add:
      - NET_ADMIN
    ports:
      - 443:1194 # for openvpn
    volumes:
      - ./easyrsa_master:/etc/openvpn/easyrsa
      - ./ccd_master:/etc/openvpn/ccd
      #- ./openvpn.conf:/etc/openvpn/setup/openvpn.conf
  ovpn-admin:
    container_name: ovpn-admin
    image: flant/ovpn-admin
    command: /app/ovpn-admin
    environment:
      OVPN_DEBUG: "true"
      OVPN_VERBOSE: "true"
      OVPN_NETWORK: "10.16.0.0/24"
      OVPN_CCD: "true"
      OVPN_CCD_PATH: "/mnt/ccd"
      EASYRSA_PATH: "/mnt/easyrsa"
      OVPN_SERVER: "vpn.mydomain.com:443:tcp"
      OVPN_INDEX_PATH: "/mnt/easyrsa/pki/index.txt"
      OVPN_AUTH: "true"
      OVPN_AUTH_DB_PATH: "/mnt/easyrsa/pki/users.db"
      LOG_LEVEL: "debug"
    network_mode: service:openvpn
    volumes:
      - ./easyrsa_master:/mnt/easyrsa
      - ./ccd_master:/mnt/ccd
  nginx:
    container_name: nginx
    image: nginx:latest
    ports:
      - 8080:8080 # for nginx
    volumes:
      - ./.htpasswd:/etc/nginx/.htpasswd:ro
      - ./default.conf:/etc/nginx/conf.d/default.conf:ro

編輯 default.conf

server {
  listen 8080;
  server_name 127.0.0.1;

  location / {
    auth_basic           "Pass";
    auth_basic_user_file /etc/nginx/.htpasswd;
    proxy_pass http://openvpn:8080;
  }
}

產生管理者帳號密碼檔 .htpasswd Exp. 建立管理者 jonathan
```
apk add apache2-utils
htpasswd -c .htpasswd jonathan
cat .htpasswd
```
應該可以看到類似 jonathan:$arpxxxxxxxxxxx 這樣的內容, 之後新增其他帳號就不需要 -c Exp. htpasswd .htpasswd myadm
啟動 ovpn-admin 服務
```
docker compose up -d
```

參考 - https://github.com/flant/ovpn-admin/issues/203
將 /etc/openvpn/setup/openvpn.conf 複製出來, 改成自己想要的版本, 在掛上去使用

處理方式

docker cp openvpn:/etc/openvpn/setup/openvpn.conf .

vi openvpn.conf

Exp. 加上 route 172.16.0.0/24 , route 172.16.1.0/24

:
push "route 172.16.0.0 255.255.255.0"
push "route 172.16.1.0 255.255.255.0"

vi docker-compose.yml

啟用 openvpn: → volumes: → ./openvpn.conf:/etc/openvpn/setup/openvpn.conf

services:
  openvpn:
  :
  :
    volumes:
      - ./easyrsa_master:/etc/openvpn/easyrsa
      - ./ccd_master:/etc/openvpn/ccd
      - ./openvpn.conf:/etc/openvpn/setup/openvpn.conf
  :