自启动+看门狗: start.sh 幂等拉起服务+watchdog, watchdog 30s 检查自动恢复

start.sh

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+#!/bin/bash
+# 7z-encrypt 服务端自启动脚本 (幂等: 已在跑则跳过)
+# 用法: /root/server/start.sh [--force]
+set -e
+
+cd /root/server
+
+if pgrep -f 'python3 [m]ain\.py' > /dev/null 2>&1 && [ "$1" != "--force" ]; then
+    echo "[start] 服务已在运行, 跳过"
+    exit 0
+fi
+
+# 杀掉残留进程 (防重复拉起), 再启动
+pkill -9 -f 'python3 [m]ain\.py' 2>/dev/null || true
+sleep 1
+
+# 后台常驻: setsid + nohup 防 SSH 断连杀进程; SZ_TOKEN 与客户端预共享
+(setsid nohup env SZ_TOKEN=sz-token-95197 python3 main.py > /tmp/sz-server.log 2>&1 &)
+
+# 等启动完成
+for i in 1 2 3 4 5 6; do
+    sleep 1
+    grep -q 'startup complete' /tmp/sz-server.log 2>/dev/null && break
+done
+
+if grep -q 'startup complete' /tmp/sz-server.log 2>/dev/null; then
+    echo "[start] 服务已启动 (PID $(pgrep -f 'python3 [m]ain\.py' | head -1))"
+else
+    echo "[start] 启动失败, 日志尾部:"
+    tail -5 /tmp/sz-server.log
+    exit 1
+fi
+
+# 拉起看门狗 (防重复, watchdog.sh 自身检查)
+if ! pgrep -f 'watchdog[.]sh' > /dev/null 2>&1; then
+    (setsid nohup /root/server/watchdog.sh > /dev/null 2>&1 &)
+    echo "[start] 看门狗已启动"
+fi

watchdog.sh

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+#!/bin/bash
+# 7z-encrypt 服务看门狗: 每 30s 检查服务进程, 挂了自动拉起
+# 由 start.sh 启动 (容器唤醒后自动恢复); 日志 /tmp/sz-watchdog.log
+LOGFILE=/tmp/sz-watchdog.log
+
+log() {
+    echo "$(date '+%F %T') $1" >> "$LOGFILE"
+}
+
+# 防重复: 已有 watchdog 实例则退出
+if pgrep -f 'watchdog[.]sh' > /dev/null 2>&1; then
+    exit 0
+fi
+
+log "[watchdog] 启动, PID $$"
+while true; do
+    if ! pgrep -f 'python3 [m]ain\.py' > /dev/null 2>&1; then
+        log "[watchdog] 服务挂了, 拉起..."
+        /root/server/start.sh >> "$LOGFILE" 2>&1 || log "[watchdog] 拉起失败"
+    fi
+    sleep 30
+done