2511-Druid监控功能的深入使用与配置-如何记录监控数据（基于logback）

Druid的监控很强大，但可惜的是监控数据是存在内存中的，需求就是定时把监控数据记录下来，以日志文件的形式或者数据库入库。

记录两种方式：

1. 数据库入库
2. logback形式记录

原理（重点）

1. 如果仅仅想记录sql的监控，可以自己重写DruidDataSourceStatLogger的log方法，这个方式是Druid记录日志的默认接口，在此略过。
2. 使用内部接口，直接获取元数据。
   

Druid包中有个DruidStatService类，这个是监控的业务类。

其中有个service方法， public String service(String url) ,参数是形如/sql.json的字符串，service方法根据不同的参数，获取不同的监控数据，返回的字符串即已经序列化后的监控数据JSON字符串。

例如，"/basic.json" 就可以获取基础数据，"/weburi.json" 就可以获取URI页面的数据。

利用这个业务接口，即可获取我们想要的监控数据。

使用springboot的定时任务，可以方便的定时执行日志记录。直接上代码。

说明：SyslogService是自定义的业务类，用于持久化日志，可注释掉。

package com.company.project.timetask;

import com.alibaba.druid.stat.DruidStatService;
import com.alibaba.fastjson.JSONObject;
import com.company.project.model.Syslog;
import com.company.project.service.SyslogService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.util.Date;


/**
 * 记录Druid的监控信息
 */
@Component
public class DruidLogTask {

    private static Logger myLogger = LoggerFactory.getLogger(DruidLogTask.class);

    // 获取DruidStatService
    private DruidStatService druidStatService = DruidStatService.getInstance();

    // 是否是重启后的第一次记录
    private boolean isFirstflag = true;

//    @Autowired
//    private SyslogService syslogService;

    // 启动后延迟5秒调用  每5*60*1000即5分钟记录一次
//    @Scheduled(initialDelay = 5000, fixedDelay = 300000)
    @Scheduled(initialDelay = 5000, fixedDelay = 20000)
    @Async// 定时任务异步化  还需在启动类上加@EnableAsync
    public void log() throws InterruptedException {

        // 首次启动标志
        if (isFirstflag) {
            myLogger.info("===============已重启，重启时间是{}，开始新的记录===============", LocalDateTime.now().toString());
            isFirstflag = !isFirstflag;
//            Syslog newLog = new Syslog();
//            newLog.setLogType("druidLog");
//            newLog.setLogBody("检测到重启");
//            newLog.setCreatTime(new Date());
//            syslogService.save(newLog);
        }

        JSONObject allResult = new JSONObject(16, true);

        // 首页信息
        String basicJson = druidStatService.service("/basic.json");
        // 数据源
        String datasourceJson = druidStatService.service("/datasource.json");
        // SQL监控
        String sqlJson = druidStatService.service("/sql.json?orderBy=SQL&orderType=desc&page=1&perPageCount=1000000&");
        // SQL防火墙
        String wallJson = druidStatService.service("/wall.json");
        // web应用
        String webappJson = druidStatService.service("/webapp.json");
        // URI监控
        String weburiJson = druidStatService.service("/weburi.json?orderBy=URI&orderType=desc&page=1&perPageCount=1000000&");
        // session监控
        String websessionJson = druidStatService.service("/websession.json");
        // spring监控
        String springJson = druidStatService.service("/spring.json");

        allResult.put("/basic.json", JSONObject.parseObject(basicJson));
        allResult.put("/datasource.json", JSONObject.parseObject(datasourceJson));
        allResult.put("/sql.json", JSONObject.parseObject(sqlJson));
        allResult.put("/wall.json", JSONObject.parseObject(wallJson));
        allResult.put("/webapp.json", JSONObject.parseObject(webappJson));
        allResult.put("/weburi.json", JSONObject.parseObject(weburiJson));
        allResult.put("/websession.json", JSONObject.parseObject(websessionJson));
        allResult.put("/spring.json", JSONObject.parseObject(springJson));

        String allResultJsonString = allResult.toJSONString();
        myLogger.info("Druid监控定时记录，allResult==={}", allResultJsonString);

//        Syslog newLog = new Syslog();
//        newLog.setLogType("druidLog");
//        newLog.setLogBody(allResultJsonString);
//        newLog.setCreatTime(new Date());
//        syslogService.save(newLog);
    }
}

使用logback记录数据到日志

主要是使用了内置的RollingFileAppender和自定义logger指定类进行记录

核心配置

    <!--配置变量-->
    <!--文件路径前缀-->
    <property name="LOG_HOME_PATH" value="file_logs"/>
    <property name="encoder_pattern" value="%d{yyyy/MM/dd HH:mm:ss.SSS} %-5level [%thread] [%c{0}:%L] : %msg%n"/>
    <property name="maxHistory" value="60"/>
    <property name="maxFileSize" value="10MB"/>


    <appender name="druidSqlRollingFile" class="ch.qos.logback.core.rolling.RollingFileAppender">

        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME_PATH}/druid-sql.%d.%i.log</fileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${maxFileSize}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <encoder>
            <pattern>${encoder_pattern}</pattern>
            <charset>UTF-8</charset>
        </encoder>

    </appender>

    <!--配置druid的SQL日志输出-->
    <logger name="druid.sql.Statement" level="DEBUG" additivity="false">
        <appender-ref ref="druidSqlRollingFile" />
    </logger>

如果文件的写压力比较大，还可以再引用一层异步队列appender,这个AsyncAppender也是logback提供好的。

完整的logback配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds" debug="false">

    <!--配置变量-->
    <!--文件路径前缀-->
    <property name="LOG_HOME_PATH" value="file_logs"/>
    <property name="encoder_pattern" value="%d{yyyy/MM/dd HH:mm:ss.SSS} %-5level [%thread] [%c{0}:%L] : %msg%n"/>
    <property name="maxHistory" value="60"/>
    <property name="maxFileSize" value="10MB"/>


    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>${encoder_pattern}</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>

    <appender name="FILE_All" class="ch.qos.logback.core.rolling.RollingFileAppender">

        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME_PATH}/level_all.%d.%i.log</fileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${maxFileSize}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <encoder>
            <pattern>${encoder_pattern}</pattern>
            <charset>UTF-8</charset>
        </encoder>

    </appender>

    <appender name="FILE_INFO" class="ch.qos.logback.core.rolling.RollingFileAppender">

        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME_PATH}/level_info.%d.%i.log</fileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${maxFileSize}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <encoder>
            <pattern>${encoder_pattern}</pattern>
            <charset>UTF-8</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>


    <appender name="FILE_DEBUG" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">

            <fileNamePattern>${LOG_HOME_PATH}/level_debug.%d.%i.log</fileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${maxFileSize}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <encoder>
            <pattern>${encoder_pattern}</pattern>
            <charset>UTF-8</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>DEBUG</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <appender name="FILE_ERROR" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME_PATH}/level_error.%d.%i.log</fileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${maxFileSize}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <encoder>
            <pattern>${encoder_pattern}</pattern>
            <charset>UTF-8</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <appender name="FILE_CONTROLLER_LOG" class="ch.qos.logback.core.rolling.RollingFileAppender">

        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME_PATH}/controller_log.%d.%i.log</fileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${maxFileSize}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <encoder>
            <pattern>${encoder_pattern}</pattern>
            <charset>UTF-8</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>



    <appender name="druidSqlRollingFile" class="ch.qos.logback.core.rolling.RollingFileAppender">

        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME_PATH}/druid-sql.%d.%i.log</fileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${maxFileSize}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <encoder>
            <pattern>${encoder_pattern}</pattern>
            <charset>UTF-8</charset>
        </encoder>

    </appender>


    <appender name="druidMonitorRollingFile" class="ch.qos.logback.core.rolling.RollingFileAppender">

        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME_PATH}/druid-monitor.%d.%i.log</fileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${maxFileSize}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <encoder>
            <pattern>${encoder_pattern}</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>

    <!--自定义logback的扩展appender-->
    <!--    <appender name="FILE_SELF" class="com.company.project.core.log.MyAppender">

            <encoder>
                <pattern>%d{yyyy/MM/dd HH:mm:ss.SSS} %-5level [%thread] [%c{0}:%L] : %msg%n</pattern>
                <charset>UTF-8</charset>
            </encoder>
            <filter class="ch.qos.logback.classic.filter.LevelFilter">
                <level>ERROR</level>
                <onMatch>ACCEPT</onMatch>
                <onMismatch>DENY</onMismatch>
            </filter>
        </appender>-->

    <!-- 异步INFO输出 -->
    <appender name ="ASYNC_INFO" class= "ch.qos.logback.classic.AsyncAppender">
        <!-- 不丢失日志.默认的,如果队列的80%已满,则会丢弃TRACT、DEBUG、INFO级别的日志 -->
        <discardingThreshold>0</discardingThreshold>
        <!-- 更改默认的队列的深度,该值会影响性能.默认值为256 -->
        <queueSize>512</queueSize>
        <!-- 添加附加的appender,最多只能添加一个 -->
        <appender-ref ref ="FILE_INFO"/>
    </appender>

    <!-- 异步输出 -->
    <appender name ="ASYNC_CONTROLLER_LOG" class= "ch.qos.logback.classic.AsyncAppender">
        <!-- 不丢失日志.默认的,如果队列的80%已满,则会丢弃TRACT、DEBUG、INFO级别的日志 -->
        <discardingThreshold>0</discardingThreshold>
        <!-- 更改默认的队列的深度,该值会影响性能.默认值为256 -->
        <queueSize>512</queueSize>
        <!-- 添加附加的appender,最多只能添加一个 -->
        <appender-ref ref ="FILE_CONTROLLER_LOG"/>
    </appender>

    <!-- 控制台输出日志级别 -->
    <root level="DEBUG">
        <appender-ref ref="STDOUT"/>
        <appender-ref ref="FILE_All"/>
        <appender-ref ref="FILE_DEBUG"/>
        <appender-ref ref="ASYNC_INFO"/>
        <appender-ref ref="FILE_ERROR"/>
        <!--<appender-ref ref="FILE_SELF"/>-->
    </root>

    <!--配置druid的SQL日志输出-->
    <logger name="druid.sql.Statement" level="DEBUG" additivity="false">
        <appender-ref ref="druidSqlRollingFile" />
    </logger>

    <!--配置druid的监控日志输出-->
    <!--<logger name="com.company.project.support.druid.MyDruidDataSourceStatLoggerAdapter" level="DEBUG" additivity="false">-->
        <!--<appender-ref ref="druidMonitorRollingFile" />-->
    <!--</logger>-->

    <!--配置定时任务DruidLogTask的监控日志输出-->
    <logger name="com.company.project.timetask.DruidLogTask" level="DEBUG" additivity="false">
        <appender-ref ref="druidMonitorRollingFile" />
    </logger>

    <!--配置aop对controller参数日志的监控-->
    <logger name="com.company.project.support.aop.ControllerLogAop" level="INFO" additivity="false">
        <appender-ref ref="ASYNC_CONTROLLER_LOG" />
    </logger>


    <!-- <logger name="com.mchange" level="ERROR" /> -->
     <logger name="org.springframework" level="ERROR" />
     <logger name="org.mybatis" level="ERROR" />
    <!-- <logger name="org.apache.activemq" level="ERROR" /> -->

    <logger name="java.sql.Connection" level="DEBUG" />
    <logger name="java.sql.Statement" level="DEBUG" />
    <logger name="java.sql.PreparedStatement" level="DEBUG" />

    <logger name="org.springframework.scheduling" level="INFO"/>
    <logger name="org.springframework.session" level="INFO"/>

    <logger name="org.apache.catalina.startup.DigesterFactory" level="ERROR"/>
    <logger name="org.apache.catalina.util.LifecycleBase" level="ERROR"/>
    <logger name="org.apache.coyote.http11.Http11NioProtocol" level="WARN"/>
    <logger name="org.apache.sshd.common.util.SecurityUtils" level="WARN"/>
    <logger name="org.apache.tomcat.util.net.NioSelectorPool" level="WARN"/>
    <logger name="org.crsh.plugin" level="WARN"/>
    <logger name="org.crsh.ssh" level="WARN"/>
    <logger name="org.eclipse.jetty.util.component.AbstractLifeCycle" level="ERROR"/>
    <logger name="org.hibernate.validator.internal.util.Version" level="WARN"/>
    <logger name="org.springframework.boot.actuate.autoconfigure.CrshAutoConfiguration" level="WARN"/>

    <!-- 级别依次为【从高到低】：FATAL > ERROR > WARN > INFO > DEBUG > TRACE  -->

</configuration>