[Unit]
# MQTT Broker 常驻守护（Linux 单进程同时监听 TCP 1883 + WebSocket 8083）
# 安装：
#   cp docs/deploy/iot-broker.service /etc/systemd/system/iot-broker.service
#   vi /etc/systemd/system/iot-broker.service      # 改下面 3 处占位路径
#   systemctl daemon-reload && systemctl enable --now iot-broker
# 查看：systemctl status iot-broker ｜ journalctl -u iot-broker -f
Description=YwxApp IoT MQTT Broker (Workerman)
Documentation=https://www.ywxapp.cn
After=network-online.target mariadb.service redis.service
Wants=network-online.target

[Service]
# ▼▼▼ 按实际环境改这三行 ▼▼▼
WorkingDirectory=/www/wwwroot/ywxapp_dev
ExecStart=/www/server/php/74/bin/php think iot start
User=www
Group=www

# Workerman 主进程常驻前台（不加 -d），日志交给 journald 并按天落 runtime/log
Type=simple
StandardOutput=append:/www/wwwroot/ywxapp_dev/runtime/iot.log
StandardError=append:/www/wwwroot/ywxapp_dev/runtime/iot.log

# 若 runtime/iot.pid 里的进程还活着，说明已有一个实例在跑，直接启动失败而不是抢端口
ExecStartPre=/bin/sh -c 'p=/www/wwwroot/ywxapp_dev/runtime/iot.pid; if [ -f "$p" ] && kill -0 "$(cat "$p")" 2>/dev/null; then echo "iot broker already running (pid $(cat $p))" >&2; exit 1; fi; rm -f "$p"; exit 0'

# Workerman 推荐组合：主进程收 SIGINT 优雅退出，超时后整组 SIGKILL
KillSignal=SIGINT
KillMode=mixed
TimeoutStopSec=30

Restart=always
RestartSec=5
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target