93 lines
2.6 KiB
Bash
Executable File
93 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
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# MySQL连接保活服务 - 防止长时间空置导致连接失效
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# 支持跨平台运行 (macOS/Linux/CentOS)
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LOG_FILE="/tmp/ljwx-mysql-keepalive.log"
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MYSQL_CONTAINER="ljwx-mysql"
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MYSQL_PASSWORD="${MYSQL_PASSWORD:-123456}"
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# 检测操作系统
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OS=$(uname -s)
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log() {
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" | tee -a "$LOG_FILE"
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}
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# 跨平台curl检测
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check_curl() {
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if command -v curl >/dev/null 2>&1; then
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return 0
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elif command -v wget >/dev/null 2>&1; then
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return 1 # 使用wget
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else
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return 2 # 都没有
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fi
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}
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# 跨平台HTTP请求
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http_request() {
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local url="$1"
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if check_curl; then
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curl -s "$url"
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else
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wget -qO- "$url" 2>/dev/null
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fi
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}
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keepalive_check() {
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# 检查MySQL连接
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if docker exec "$MYSQL_CONTAINER" mysqladmin ping -u root -p"$MYSQL_PASSWORD" >/dev/null 2>&1; then
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log "✅ MySQL连接正常"
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# 执行保活查询
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docker exec "$MYSQL_CONTAINER" mysql -u root -p"$MYSQL_PASSWORD" -e "SELECT 'keepalive' as status, NOW() as time;" >/dev/null 2>&1
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log "💓 保活查询已执行"
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# 检查连接数
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CONNECTIONS=$(docker exec "$MYSQL_CONTAINER" mysql -u root -p"$MYSQL_PASSWORD" -e "SHOW STATUS LIKE 'Threads_connected';" 2>/dev/null | tail -1 | awk '{print $2}')
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log "📊 当前连接数: $CONNECTIONS"
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else
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log "❌ MySQL连接失败，尝试重启服务"
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# 根据Docker Compose版本选择命令
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if command -v docker-compose >/dev/null 2>&1; then
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docker-compose restart ljwx-mysql
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sleep 30
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docker-compose restart ljwx-boot
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else
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docker compose restart ljwx-mysql
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sleep 30
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docker compose restart ljwx-boot
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fi
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log "🔄 服务重启完成"
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fi
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# 检查应用连接
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if http_request "http://localhost:9998/actuator/health/db" | grep -q "UP"; then
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log "✅ 应用数据源正常"
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else
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log "❌ 应用数据源异常"
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# 触发应用重连
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http_request "http://localhost:9998/actuator/refresh" >/dev/null 2>&1 || true
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fi
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}
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# 创建日志目录（如果需要）
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case "$OS" in
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"Darwin") # macOS
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# macOS使用/tmp，无需创建目录
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;;
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"Linux") # Linux
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# 尝试创建日志目录
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sudo mkdir -p /var/log 2>/dev/null || mkdir -p $(dirname "$LOG_FILE")
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;;
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esac
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log "🚀 启动LJWX MySQL连接保活服务 (OS: $OS)"
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# 主循环
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while true; do
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keepalive_check
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sleep 300 # 每5分钟检查一次
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done
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