start.sh

#!/bin/bash

echo "===== Application Startup at $(date) ====="
whoami
cat /etc/passwd

echo "===== System Information ====="
uname -a
echo "CPU: $(lscpu | grep 'Model name' | cut -f 2 -d ":")"
echo "Memory: $(free -h | awk '/^Mem:/ {print $2}')"
echo "Disk: $(df -h / | awk 'NR==2 {print $2}')"
echo "==============================="

# 检查并生成 SSH 主机密钥（如果不存在）
if [ ! -f /etc/dropbear/dropbear_rsa_host_key ]; then
    echo "Generating RSA host key..."
    dropbearkey -t rsa -f /etc/dropbear/dropbear_rsa_host_key
fi

# 启动 Dropbear，使用 2202 端口，允许密码认证，后台运行
echo "Starting Dropbear..."
dropbear -R -p 2202 -w -E -F &

# 检查 Dropbear 是否成功启动
for i in {1..10}; do
    if netstat -tuln | grep :2202 > /dev/null; then
        echo "Dropbear started successfully on port 2202"
        break
    fi
    if [ $i -eq 10 ]; then
        echo "Failed to start Dropbear after 10 attempts"
        exit 1
    fi
    echo "Waiting for Dropbear to start... (attempt $i)"
    sleep 1
done

echo "Dropbear version: $(dropbear -V 2>&1)"

# 测试 SSH 连接
echo "Testing SSH connection..."
if ssh -p 2202 -o StrictHostKeyChecking=no user@localhost 'echo "SSH connection successful"'; then
    echo "SSH connection test passed"
else
    echo "SSH connection test failed"
    exit 1
fi

# 显示 Dropbear 进程信息
echo "Dropbear process:"
ps aux | grep dropbear | grep -v grep

# 显示监听端口
echo "Listening ports:"
netstat -tuln | grep LISTEN

# 启动 Node.js 应用
echo "Starting Node.js application..."
npm start

# 检查 Node.js 应用是否成功启动
if ! pgrep -f "node app.js" > /dev/null; then
    echo "Failed to start Node.js application"
    exit 1
fi

echo "Node.js application started successfully"