316 lines
11 KiB
Bash
Executable File
316 lines
11 KiB
Bash
Executable File
#!/bin/bash
|
||
|
||
#
|
||
# 智能网络监控脚本 - Ubuntu版本
|
||
#
|
||
# 功能描述：
|
||
# 该脚本会定期测试与指定目标IP的网络连通性。
|
||
# 如果在设定的"监控窗口"时间内连接持续失败，脚本将启动一个可取消的关机倒计时。
|
||
# 如果在倒计时期间网络恢复，关机将被中止。
|
||
# 所有操作都会被记录在日志文件中。
|
||
#
|
||
# 使用方法：
|
||
# sudo ./smart_shutdown.sh
|
||
#
|
||
# 要求：需要root权限来执行关机命令
|
||
#
|
||
|
||
# ==================== 配置参数 ====================
|
||
|
||
# 监控的目标IP地址
|
||
TARGET_IP="192.168.3.15"
|
||
|
||
# 正常监控时的ping间隔（秒）
|
||
NORMAL_PING_INTERVAL=15
|
||
|
||
# 监控窗口时长（秒） - 在此期间持续失败则触发关机
|
||
MONITOR_WINDOW_SECONDS=180
|
||
|
||
# 关机倒计时时长（秒）
|
||
SHUTDOWN_COUNTDOWN=60
|
||
|
||
# 关机倒计时阶段的ping间隔（秒）
|
||
COUNTDOWN_PING_INTERVAL=3
|
||
|
||
# ping超时时间（秒）
|
||
PING_TIMEOUT=3
|
||
|
||
# 日志配置
|
||
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
|
||
LOG_DIRECTORY="$SCRIPT_DIR/logs"
|
||
MAX_LOG_DAYS=30
|
||
|
||
# 配置文件路径
|
||
CONFIG_FILE="$SCRIPT_DIR/config.json"
|
||
|
||
# ==================== 函数定义 ====================
|
||
|
||
# 颜色定义
|
||
RED='\033[0;31m'
|
||
GREEN='\033[0;32m'
|
||
YELLOW='\033[1;33m'
|
||
BLUE='\033[0;34m'
|
||
CYAN='\033[0;36m'
|
||
PURPLE='\033[0;35m'
|
||
NC='\033[0m' # No Color
|
||
|
||
# 日志写入函数
|
||
write_log() {
|
||
local level="$1"
|
||
local message="$2"
|
||
local timestamp=$(date '+%Y-%m-%d %H:%M:%S')
|
||
local log_file="$LOG_DIRECTORY/network_monitor_$(date '+%Y%m%d').log"
|
||
local log_entry="[$timestamp] [$level] $message"
|
||
|
||
# 确保日志目录存在
|
||
mkdir -p "$LOG_DIRECTORY"
|
||
|
||
# 写入日志文件
|
||
echo "$log_entry" >> "$log_file"
|
||
|
||
# 根据日志级别在控制台输出不同颜色的信息
|
||
case "$level" in
|
||
"SUCCESS")
|
||
echo -e "${GREEN}$log_entry${NC}"
|
||
;;
|
||
"FAIL")
|
||
echo -e "${RED}$log_entry${NC}"
|
||
;;
|
||
"WARN")
|
||
echo -e "${YELLOW}$log_entry${NC}"
|
||
;;
|
||
"CRITICAL")
|
||
echo -e "${PURPLE}$log_entry${NC}"
|
||
;;
|
||
"INFO")
|
||
echo -e "$log_entry"
|
||
;;
|
||
*)
|
||
echo -e "$log_entry"
|
||
;;
|
||
esac
|
||
}
|
||
|
||
# 加载配置文件
|
||
load_configuration() {
|
||
if [[ -f "$CONFIG_FILE" ]]; then
|
||
write_log "INFO" "加载配置文件: $CONFIG_FILE"
|
||
|
||
# 使用jq解析JSON配置文件（如果可用）
|
||
if command -v jq >/dev/null 2>&1; then
|
||
local target_ip=$(jq -r '.TargetIP // empty' "$CONFIG_FILE" 2>/dev/null)
|
||
local monitor_window=$(jq -r '.MonitorWindowSeconds // empty' "$CONFIG_FILE" 2>/dev/null)
|
||
local shutdown_countdown=$(jq -r '.ShutdownCountdown // empty' "$CONFIG_FILE" 2>/dev/null)
|
||
local ping_interval=$(jq -r '.NormalPingInterval // empty' "$CONFIG_FILE" 2>/dev/null)
|
||
|
||
[[ -n "$target_ip" ]] && TARGET_IP="$target_ip"
|
||
[[ -n "$monitor_window" ]] && MONITOR_WINDOW_SECONDS="$monitor_window"
|
||
[[ -n "$shutdown_countdown" ]] && SHUTDOWN_COUNTDOWN="$shutdown_countdown"
|
||
[[ -n "$ping_interval" ]] && NORMAL_PING_INTERVAL="$ping_interval"
|
||
|
||
write_log "SUCCESS" "配置文件加载成功"
|
||
else
|
||
write_log "WARN" "jq未安装，无法解析JSON配置文件，使用默认配置"
|
||
fi
|
||
else
|
||
# 创建默认配置文件
|
||
create_default_config
|
||
fi
|
||
}
|
||
|
||
# 创建默认配置文件
|
||
create_default_config() {
|
||
cat > "$CONFIG_FILE" << EOF
|
||
{
|
||
"TargetIP": "$TARGET_IP",
|
||
"MonitorWindowSeconds": $MONITOR_WINDOW_SECONDS,
|
||
"ShutdownCountdown": $SHUTDOWN_COUNTDOWN,
|
||
"NormalPingInterval": $NORMAL_PING_INTERVAL
|
||
}
|
||
EOF
|
||
write_log "INFO" "创建默认配置文件: $CONFIG_FILE"
|
||
}
|
||
|
||
# 获取本机IP地址
|
||
get_local_ip() {
|
||
local local_ip
|
||
# 尝试获取默认路由接口的IP地址
|
||
local_ip=$(ip route get 8.8.8.8 2>/dev/null | awk '{for(i=1;i<=NF;i++) if($i=="src") print $(i+1)}' | head -1)
|
||
|
||
if [[ -z "$local_ip" ]]; then
|
||
# 备用方法：获取第一个非环回接口的IP
|
||
local_ip=$(ip addr show | grep -E 'inet [0-9]' | grep -v '127.0.0.1' | head -1 | awk '{print $2}' | cut -d'/' -f1)
|
||
fi
|
||
|
||
[[ -n "$local_ip" ]] && echo "$local_ip" || echo "未知"
|
||
}
|
||
|
||
# 测试网络连接
|
||
test_network_connection() {
|
||
local target_ip="$1"
|
||
# 使用ping命令测试连接，发送1个包，超时时间为PING_TIMEOUT秒
|
||
ping -c 1 -W "$PING_TIMEOUT" "$target_ip" >/dev/null 2>&1
|
||
return $?
|
||
}
|
||
|
||
# 清理旧日志文件
|
||
cleanup_old_logs() {
|
||
if [[ -d "$LOG_DIRECTORY" ]]; then
|
||
# 删除超过MAX_LOG_DAYS天的日志文件
|
||
find "$LOG_DIRECTORY" -name "network_monitor_*.log" -type f -mtime +$MAX_LOG_DAYS -exec rm -f {} \; 2>/dev/null
|
||
fi
|
||
}
|
||
|
||
# 信号处理函数
|
||
cleanup_and_exit() {
|
||
write_log "INFO" "接收到退出信号，正在清理..."
|
||
write_log "INFO" "========== 脚本退出 =========="
|
||
exit 0
|
||
}
|
||
|
||
# 检查root权限
|
||
check_root_permission() {
|
||
if [[ $EUID -ne 0 ]]; then
|
||
echo -e "${RED}错误：此脚本需要root权限才能执行关机操作${NC}"
|
||
echo -e "${YELLOW}请使用以下命令运行：${NC}"
|
||
echo -e "${CYAN}sudo $0${NC}"
|
||
exit 1
|
||
fi
|
||
}
|
||
|
||
# ==================== 主程序开始 ====================
|
||
|
||
# 设置信号处理
|
||
trap cleanup_and_exit SIGINT SIGTERM
|
||
|
||
# 检查权限
|
||
check_root_permission
|
||
|
||
# 清理旧日志
|
||
cleanup_old_logs
|
||
|
||
# 加载配置
|
||
load_configuration
|
||
|
||
# 初始化
|
||
clear
|
||
local_ip=$(get_local_ip)
|
||
write_log "INFO" "========== 脚本启动 =========="
|
||
write_log "INFO" "运行用户: $(whoami)"
|
||
write_log "INFO" "本机IP: $local_ip"
|
||
write_log "INFO" "监控目标: $TARGET_IP"
|
||
write_log "INFO" "监控窗口: ${MONITOR_WINDOW_SECONDS}秒"
|
||
write_log "INFO" "关机倒计时: ${SHUTDOWN_COUNTDOWN}秒"
|
||
write_log "INFO" "日志目录: $LOG_DIRECTORY"
|
||
write_log "INFO" "配置文件: $CONFIG_FILE"
|
||
write_log "INFO" "脚本已启动，按 Ctrl+C 退出..."
|
||
|
||
echo "========================================"
|
||
|
||
# 主循环变量
|
||
failure_start_time=""
|
||
normal_status_counter=0
|
||
normal_status_log_interval=24 # 每24次正常检测记录一次日志（约6分钟）
|
||
|
||
# 主循环
|
||
while true; do
|
||
# 测试网络连接
|
||
if test_network_connection "$TARGET_IP"; then
|
||
# 网络连接正常
|
||
if [[ -n "$failure_start_time" ]]; then
|
||
write_log "SUCCESS" "网络连接已恢复"
|
||
echo -e "${GREEN}[OK] 网络连接已恢复，重置监控窗口${NC}"
|
||
failure_start_time="" # 重置失败计时器
|
||
normal_status_counter=0 # 重置正常状态计数器
|
||
else
|
||
echo -e "${GREEN}[OK] 网络连接正常${NC}"
|
||
# 正常连接时减少日志频率，只定期记录
|
||
((normal_status_counter++))
|
||
if [[ $normal_status_counter -ge $normal_status_log_interval ]]; then
|
||
write_log "INFO" "网络连接持续正常（已检测 $normal_status_counter 次）"
|
||
normal_status_counter=0 # 重置计数器
|
||
fi
|
||
fi
|
||
|
||
# 只在控制台显示等待信息，不写入日志文件
|
||
echo -e "${CYAN}等待 ${NORMAL_PING_INTERVAL}秒后继续监控...${NC}"
|
||
sleep "$NORMAL_PING_INTERVAL"
|
||
|
||
else
|
||
# 网络连接失败
|
||
write_log "FAIL" "Ping失败 - 目标: $TARGET_IP"
|
||
|
||
if [[ -z "$failure_start_time" ]]; then
|
||
# 记录首次失败的时间
|
||
failure_start_time=$(date +%s)
|
||
write_log "WARN" "网络首次中断，开始进入监控窗口计时"
|
||
fi
|
||
|
||
# 计算网络已中断的时间
|
||
current_time=$(date +%s)
|
||
failure_duration=$((current_time - failure_start_time))
|
||
write_log "INFO" "网络已持续中断 $failure_duration / ${MONITOR_WINDOW_SECONDS} 秒"
|
||
|
||
# 显示详细状态
|
||
remaining_time=$((MONITOR_WINDOW_SECONDS - failure_duration))
|
||
echo -e "${YELLOW}监控状态 - 已中断: ${failure_duration}/${MONITOR_WINDOW_SECONDS}秒，剩余: ${remaining_time}秒${NC}"
|
||
|
||
if [[ $failure_duration -ge $MONITOR_WINDOW_SECONDS ]]; then
|
||
# 持续失败时间超过监控窗口，开始关机倒计时
|
||
write_log "CRITICAL" "网络持续中断已超过 ${MONITOR_WINDOW_SECONDS} 秒，开始关机流程"
|
||
echo "========================================"
|
||
|
||
shutdown_cancelled=false
|
||
countdown_end_time=$((current_time + SHUTDOWN_COUNTDOWN))
|
||
|
||
while [[ $(date +%s) -lt $countdown_end_time && "$shutdown_cancelled" == "false" ]]; do
|
||
current_time=$(date +%s)
|
||
remaining_seconds=$((countdown_end_time - current_time))
|
||
|
||
if [[ $remaining_seconds -le 0 ]]; then
|
||
break
|
||
fi
|
||
|
||
write_log "WARN" "距离关机还有 $remaining_seconds 秒... 正在快速检测网络"
|
||
echo "----------------------------------------"
|
||
echo -e "${YELLOW}距离关机还有 $remaining_seconds 秒...${NC}"
|
||
echo -e "${YELLOW}正在快速检测网络连接... 按 Ctrl+C 可取消关机${NC}"
|
||
|
||
# 在倒计时中再次检测网络
|
||
if test_network_connection "$TARGET_IP"; then
|
||
write_log "SUCCESS" "网络在倒计时期间恢复！取消关机"
|
||
echo "========================================"
|
||
echo -e "${GREEN}[OK] 网络连接已恢复！取消关机操作${NC}"
|
||
echo "========================================"
|
||
failure_start_time=""
|
||
shutdown_cancelled=true
|
||
break
|
||
else
|
||
echo -e "${RED}[X] 网络仍然中断${NC}"
|
||
fi
|
||
|
||
# 等待下一次检测
|
||
sleep "$COUNTDOWN_PING_INTERVAL"
|
||
done
|
||
|
||
if [[ "$shutdown_cancelled" == "false" ]]; then
|
||
write_log "CRITICAL" "关机倒计时完成，执行系统关机命令"
|
||
|
||
# 执行关机命令
|
||
# 注意：为了安全起见，默认注释掉实际的关机命令
|
||
# 如需启用，请取消下面一行的注释
|
||
# shutdown -h now
|
||
|
||
echo -e "${RED}模拟关机：shutdown -h now （为防止意外，此行已注释）${NC}"
|
||
write_log "CRITICAL" "关机命令已执行（模拟模式）"
|
||
|
||
# 脚本执行完关机命令后可以退出
|
||
exit 0
|
||
fi
|
||
else
|
||
# 在监控窗口期内，继续等待
|
||
write_log "INFO" "等待 ${NORMAL_PING_INTERVAL}秒后继续..."
|
||
sleep "$NORMAL_PING_INTERVAL"
|
||
fi
|
||
fi
|
||
done |