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Logback 在 Spring Boot 中配置 access

Logback 在 Spring Boot 中配置 access

作者: mecury | 来源:发表于2019-01-15 21:35 被阅读16次

本文不介绍细节，只是将实际应用中的日志配置，在这里做个记录，方便自己大家学习借鉴

服务中的日志配置一直都是开发中比较重要的部分。先看下我认为的日志分类：

  • access访问日志：
    调用接口的时候，对于每一个调用都记录一下访问日志。方便后面的请求追踪
  • 常规日志：代码中的日志，就是我们在代码中打印的各种日志
  • 性能日志：性能日志是为了方便优化代码，监控性能的日志。在我所在的公司记录了三种有关于性能的日志
    • controller性能日志
      记录在Controller层次的放温暖耗时信息
    • service性能日志
      记录调用Service方法中的访问耗时信息
    • dao性能日志
      记录dao层访问数据库的耗时信息

下面介绍两种实现日志记录的方式：

  • 第一种：Spring Sleuth + Logback
    • 借助于 Spring Cloud 组件 Spring sleuth 实现分布式服务追踪，使用 Logback 定制日志格式，
    • 这种方式这里主要是配置了 常规日志 与 access日志。性能日志我不知道能不能配置，不知道能实现不？这里就不说了
  • 第二种：AOP + Inteceptor + Logback
    • 使用拦截器拦截请求，打印 access日志， 目的是为了生成能够追踪常规日志的 traceId
    • 使用 AOP 监控 controller、service、 dao 层中的方法，提取性能日志需要的时间内信息

1. Spring Sleuth + Logback 实现

Spring Sleuth 是 Spring Cloud 提供的分布式服务追踪框架，使用这个框架可以很方便的打印日志。通过 traceId 与 spanId 还可以在分布式服务中方便追踪请求.

Spring boot 版本：

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
    <relativePath/>
</parent>

依赖 jar 包：

<dependency>
    <groupId>net.rakugakibox.spring.boot</groupId>
    <artifactId>logback-access-spring-boot-starter</artifactId>
    <version>2.7.1</version>
</dependency>

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-sleuth</artifactId>
    <version>2.0.0.RELEASE</version>
</dependency>

logback 配置：

环境变量配置：
SpringBoot自动映射了一些值到 Logback。如：

logging.path --> LOG_PATH
logging.file --> LOG_FILE

spring.application.name=tp-forum-api
# Log
logging.path: ${LOG_PATH:${LOG_TEMP:logs}}
logging.file=${logging.path}/app.log
  • logback-spring.xml
<?xml version="1.0" encoding="UTF-8"?>
<configuration>

    <!--添加配置文件-->
    <include resource="org/springframework/boot/logging/logback/defaults.xml" />
    <include resource="org/springframework/boot/logging/logback/console-appender.xml" />

    <!--获取 spring 配置中的 key 为 spring.application.name 的 value 值-->
    <springProperty scope="context" name="applicationName" source="spring.application.name"/>

    <!--property 用于定义变量。log 在日志中输出位置-->
    <property name="LOG_FILE" value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}}/spring.log}"/>

    <!--appender打印配置-->
    <!--RollingFileAppender:每天输出到一个新的日志文件-->
    <!--TimeBasedRollingPolicy:根据时间进行滚动。设置日志总大小为1G，时间只保存30天内的日志-->
    <appender name="APP-LOG" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${LOG_FILE}</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- daily rollover -->
            <fileNamePattern>${LOG_FILE}.%d{yyyy-MM-dd}.log</fileNamePattern>
            <!-- keep 30 days' worth of history capped at 3GB total size -->
            <maxHistory>30</maxHistory>
            <totalSizeCap>1GB</totalSizeCap>
        </rollingPolicy>

        <encoder>
            <!--date | level | application name, traceId, SpanId, SpanExport | thread | logger | %F.%M:%L |msg -->
            <!-- :- 表示前面不存在，就显示 - -->
            <pattern>[%date{ISO8601}]|%-5level|[${applicationName},%X{X-B3-TraceId:-},%X{X-B3-SpanId:-}%X{X-Span-Export:-}]|[%thread]|%logger{0}|%F.%M:%L|%msg%n</pattern>
        </encoder>
    </appender>


    <!--日志打印 logger-->
    <logger name="org.springframework.web" level="INFO"/>

    <!--根 logger,没有指定logger时的默认值-->
    <root level="INFO">
        <appender-ref ref="APP-LOG" />
    </root>
</configuration>

按照下面的配置，常规日志打印出来的格式应该如下：
对应的格式是：

data | level | application name, traceId, SpanId, SpanExport | thread | logger | %F.%M:%L |msg 

[2019-01-15 19:44:44,608]|WARN |[tp-forum-api,903df707120b2927,903df707120b2927,false]|[http-nio-8080-exec-1]|HelloWrold|HelloWrold.java.hello:21|This is a warn message
[2019-01-15 19:44:44,609]|INFO |[tp-forum-api,903df707120b2927,903df707120b2927,false]|[http-nio-8080-exec-1]|HelloWrold|HelloWrold.java.hello:22|This is a info message
[2019-01-15 19:44:44,609]|ERROR|[tp-forum-api,903df707120b2927,903df707120b2927,false]|[http-nio-8080-exec-1]|HelloWrold|HelloWrold.java.hello:23|This is a error message
  • logback-access-spring.xml
<configuration>
  <!-- always a good activate OnConsoleStatusListener -->
  <!-- 监听Logback状态变化,立即输出到控制台 -->
  <statusListener class="ch.qos.logback.core.status.OnConsoleStatusListener" />
  
  <!-- properties 配置 -->
  <springProperty scope="context" name="applicationName" source="spring.application.name"/>

  <!--配置的目录-->
  <property name="ACCESS_LOG_FILE" value="${ACCESS_LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}}/access.log}"/>
  
  <!--appender规则-->
  <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>${ACCESS_LOG_FILE}</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
      <fileNamePattern>${ACCESS_LOG_FILE}.%d{yyyy-MM-dd}.log.zip</fileNamePattern>
    </rollingPolicy>

    <encoder>
      <pattern>[%t{ISO8601}]|[${applicationName},%i{X-B3-TraceId},%i{X-B3-SpanId:-},%i{X-Span-Export:-}]|%A|%h|%i{X-Real-IP}|%u|"%r"|%s|%b|%D|"%i{Referer}"|"%i{User-Agent}"</pattern>
    </encoder>
  </appender>

  <appender-ref ref="FILE" />
</configuration>

下面是打印的情况：
可以看出 TraceId 与 SpanId 没有打印出来，猜测是因为access日志打印的时候，还没有生成该Id。因此没有好的方法让access日志与常规代码日志对应起来，所以后来没有采用该方法。

[2019-01-15 19:44:44,640]|[tp-forum-api,-,-,-]|10.2.202.203|0:0:0:0:0:0:0:1|-|-|"GET /hello HTTP/1.1"|200|5|96|"-"|"PostmanRuntime/7.4.0"

AOP + Inteceptor + Logback

  • 环境配置
<parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>2.0.1.RELEASE</version>
  <relativePath />
</parent>
  • 依赖 jar 包
<dependency>
  <groupId>org.perf4j</groupId>
  <artifactId>perf4j</artifactId>
  <version>0.9.16</version>
</dependency>

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-aop</artifactId>
  <version>2.1.1.RELEASE</version>
</dependency>
  • logback-spring.xml
<?xml version="1.0" encoding="UTF-8"?>
<configuration>

    <!--常量。定义文件的输出位置-->
    <property name="log.dir" value="logs"/>
    <!--日志最大的历史 30 天-->
    <property name="maxHistory" value="30"/>

    <!--添加配置文件-->
    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
    <include resource="org/springframework/boot/logging/logback/console-appender.xml"/>

    <!--添加Logger范围内的全局变量-->
    <springProperty scope="context" name="applicationName" source="spring.application.name"/>
    <!--文件存放的位置。':' 代表前面不存在就取后面的-->
    <!--LOG_FILE 对应配置文件中 logging.file LOG_PATH 对应 logging.path -->
    <property name="LOG_FILE"
              value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}}/spring.log}"/>

    <!-- 默认定义,输出到文件 LOG_FILE -->
    <appender name="app" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${LOG_FILE}</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- daily rollover -->
            <fileNamePattern>${LOG_FILE}.%d{yyyy-MM-dd}.log</fileNamePattern>
            <!-- keep 30 days' worth of history capped at 3GB total size -->
            <maxHistory>30</maxHistory>
            <totalSizeCap>1GB</totalSizeCap>
        </rollingPolicy>
        <encoder>
            <pattern>
                [%d{yyyy-MM-dd-HH:mm:ss}]|%-5level|%X{X-B3-TraceId:-}|[%thread]|%logger{36}.%M:%L| %msg%n
            </pattern>
        </encoder>
    </appender>

    <!-- 输出到 Console 控制台 -->
    <appender name="STDOUT_CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <Target>System.out</Target>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss} %-40.40c [%5.5thread] %-5p - %m%n</pattern>
        </encoder>
    </appender>


    <!--定义 access 日志的地址-->
    <property name="ACCESS_LOG_FILE"
              value="${ACCESS_LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}}/access/access.log}"/>

    <!-- 定义 access 访问日志，输出到 ACCESS_LOG_FILE -->
    <appender name="accesslog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${ACCESS_LOG_FILE}</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${ACCESS_LOG_FILE}.%d{yyyy-MM-dd}.log</fileNamePattern>
            <maxHistory>30</maxHistory>
            <totalSizeCap>1GB</totalSizeCap>
        </rollingPolicy>
        <encoder>
            <pattern>
                %d{yyyy-MM-dd-HH:mm:ss} %m %n
            </pattern>
        </encoder>
    </appender>

    <!-- service 性能日志 -->
    <appender name="statFileAppender_service"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <FileNamePattern>${log.dir}/perf_service/perfStats.log.%d{yyyy-MM-dd}.log
            </FileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
        </rollingPolicy>
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>
                %d{yyyy-MM-dd HH:mm:ss} %-5level %logger{36} - %msg%n
            </Pattern>
        </layout>
    </appender>

    <!-- controller 性能日志 -->
    <appender name="statFileAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <FileNamePattern>${log.dir}/perf/perfStats.log.%d{yyyy-MM-dd}.log</FileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
        </rollingPolicy>
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>
                %d{yyyy-MM-dd HH:mm:ss} %-5level %logger{36} - %msg%n
            </Pattern>
        </layout>
    </appender>


    <!--DAO 性能日志-->
    <appender name="statFileAppender_dao"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <FileNamePattern>${log.dir}/perf_dao/perfStats.log.%d{yyyy-MM-dd}.log
            </FileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
        </rollingPolicy>
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>
                %d{yyyy-MM-dd HH:mm:ss} %-5level %logger{36} - %msg%n
            </Pattern>
        </layout>
    </appender>

    <!--配置周期汇总-->
    <!--service-->
    <appender name="CoalescingStatistics_Service"
              class="org.perf4j.logback.AsyncCoalescingStatisticsAppender">
        <!-- TimeSlice配置多少时间间隔去做一次汇总写入文件中 -->
        <timeSlice>10000</timeSlice>
        <appender-ref ref="statFileAppender_service"/>
    </appender>

    <!--Controller-->
    <appender name="CoalescingStatistics"
              class="org.perf4j.logback.AsyncCoalescingStatisticsAppender">
        <!-- TimeSlice配置多少时间间隔去做一次汇总写入文件中 默认值是 30000 ms -->
        <timeSlice>10000</timeSlice>
        <appender-ref ref="statFileAppender"/>
    </appender>

    <!--DAO-->
    <appender name="CoalescingStatistics_dao"
              class="org.perf4j.logback.AsyncCoalescingStatisticsAppender">
        <!-- TimeSlice配置多少时间间隔去做一次汇总写入文件中 默认值是 30000 ms -->
        <timeSlice>10000</timeSlice>
        <appender-ref ref="statFileAppender_dao"/>
    </appender>

    <!-- access performance logger -->
    <logger name="access_log" additivity="false">
        <level value="info"/>
        <appender-ref ref="accesslog"/>
    </logger>

    <!-- Service performance logger -->
    <logger name="service.perf.logger" level="info" additivity="false">
        <appender-ref ref="CoalescingStatistics_Service"/>
    </logger>

    <!-- Controller performance logger -->
    <logger name="org.perf4j.TimingLogger" level="info" additivity="false">
        <appender-ref ref="CoalescingStatistics"/>
    </logger>

    <!-- dao performance log -->
    <logger name="dao.perf.logger" level="info" additivity="false">
        <appender-ref ref="CoalescingStatistics_dao"/>
    </logger>

    <!-- org.springframework包下日志-->
    <logger name="org.springframework" level="info" additivity="true">
        <appender-ref ref="app"/>
        <appender-ref ref="STDOUT_CONSOLE"/>
    </logger>

    <!-- 根 logger。默认 logger -->
    <root level="info">
        <appender-ref ref="STDOUT_CONSOLE"/>
        <appender-ref ref="app"/>
    </root>

    <!-- org.springframework.web 包下日志-->
    <logger name="org.springframework.web" level="info"/>

</configuration>

完成上面的配置，应该是只能打印出常规日志。性能日志与access日志还不能打印出来。
为了打印出性能，日志需要结合上面的配置 logger 与 监听文件的AOP切面，来提取响应时间.

  • 配置性能日志的切面：

service 的性能日志切面：

@Aspect
@Component
public class Perf4jLogAspectService {

  //与 logback-spring.xml 中的 name 保持一致
  private static final String STOP_WATCH_LOGGER_NAME = "service.perf.logger";
  private static final Log STOP_WATCH_LOGGER = LogFactory.getLog(STOP_WATCH_LOGGER_NAME);

  //环绕监听 service文件下的方法调用
  @Around("execution(public * com.renren.truckerpathapi.service..*.*(..))")
  public Object logPer4jLogs(ProceedingJoinPoint point) throws Throwable {

    String className = point.getSignature().getDeclaringTypeName();
    String methodName = point.getSignature().getName();

    String name = className + "." + methodName;
    StopWatch stopwatch = new CommonsLogStopWatch(STOP_WATCH_LOGGER);

    final Object returnValue = point.proceed();

    stopwatch.stop(name);

    return returnValue;
  }
}

controller、dao 层的类似：

@Aspect
@Component
public class Perf4jLogAspectController {

  private static final String STOP_WATCH_LOGGER_NAME = "org.perf4j.TimingLogger";
  private static final Log STOP_WATCH_LOGGER = LogFactory.getLog(STOP_WATCH_LOGGER_NAME);

  @Around("execution(public * com.renren.truckerpathapi.controller..*.*(..))")
  public Object logPer4jLogs(ProceedingJoinPoint point) throws Throwable {
    String className = point.getSignature().getDeclaringTypeName();
    String methodName = point.getSignature().getName();

    String name = className + "." + methodName;
    StopWatch stopwatch = new CommonsLogStopWatch(STOP_WATCH_LOGGER);

    final Object returnValue = point.proceed();

    stopwatch.stop(name);

    return returnValue;
  }

}

@Component
@Aspect
public class Perf4jLogAspectDao {

  private static final String STOP_WATCH_LOGGER_NAME = "dao.perf.logger";
  private static final Log STOP_WATCH_LOGGER = LogFactory.getLog(STOP_WATCH_LOGGER_NAME);

  @Around("execution(public * com.renren.truckerpathapi.dao..*.*(..))")
  public Object logPer4jLogs(ProceedingJoinPoint point) throws Throwable {
    String className = point.getSignature().getDeclaringTypeName();
    String methodName = point.getSignature().getName();

    String name = className + "." + methodName;
    StopWatch stopwatch = new CommonsLogStopWatch(STOP_WATCH_LOGGER);

    final Object returnValue = point.proceed();

    stopwatch.stop(name);

    return returnValue;
  }
}

对于access日志，还记得上面所说的问题吗？Spring Sleuth 在 access 中不能生成 traceId的问题。
这里采用的处理方式，是自己添加一个请求拦截器，在请求返回时进行拦截（无论成功失败，请求都是会返回的），调用 logback-spring.xml 中配置的 logger 进行打印。实现如下：

  • AccessLogInterceptor.java
@Component
public class AccessLogInterceptor implements HandlerInterceptor {

  @Autowired
  private GetUserByTokenService getUserByTokenService;


  private static final Log LOGGER = LogFactory.getLog(AccessLogInterceptor.class);
  private static final Log ACCESS_LOG = LogFactory.getLog("access_log");

  private static final String SEPARATOR = "|";
  private static final String EMPTY_STR = "";

  @Override
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
                           Object handler) {
    return true;
  }

  @Override
  public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {

  }

  @Override
  public void afterCompletion(HttpServletRequest request, HttpServletResponse response,
                              Object handler, Exception ex) {
    //domain & uri & refer
    String domain = request.getServerName();
    String uri = request.getRequestURI();
    String refer = request.getHeader("Referer");
    final String token = request.getHeader("x-auth-token");
    final String installation_ID = request.getHeader("Installation-ID");

    final Users loginUser = getUserByTokenService.getUserByToken(token);

    //traceId
    String traceId = request.getHeader("X-B3-TraceId");
    if (StringUtils.isEmpty(traceId)) {
      traceId = UUID.randomUUID().toString();
    }
    MDC.put("X-B3-TraceId", traceId);

    String remoteIp = getRemoteAddr(request);
    String userId = loginUser == null ? installation_ID : String.valueOf(loginUser.getId());
    String userName = loginUser == null ? "" :
      loginUser.getFirstName() + " " + loginUser.getLastName();
    String userAgent = request.getHeader("User-Agent");
    Map<String, String> paramPair = getRequestParamValueMap(request);

    printAccesslog(traceId, remoteIp, userId, userName, domain, uri, refer, userAgent, paramPair);
  }

  //打印access log
  private void printAccesslog(String traceId, String remoteIp, String userId, String userName,
                              String domain, String uri, String refer,
                              String userAgent, Map<String, String> paramPair) {

    StringBuilder sb = new StringBuilder();

    long timestamp = System.currentTimeMillis();
    sb.append(SEPARATOR).append(timestamp);
    sb.append(SEPARATOR).append(remoteIp);
    sb.append(SEPARATOR).append(userId);
    sb.append(SEPARATOR).append(userName);
    //RequestId用于定位access log与业务log
    sb.append(SEPARATOR).append(traceId);
    sb.append(SEPARATOR).append(domain);
    sb.append(SEPARATOR).append(uri);
    sb.append(SEPARATOR).append(refer);
    sb.append(SEPARATOR).append(userAgent);
    //将参数map打印成json格式，利于统计分析
    sb.append(SEPARATOR).append(JsonUtils.toJson(paramPair));

    ACCESS_LOG.info(sb.toString());
  }

  private String getRemoteAddr(HttpServletRequest request) {
    if (LOGGER.isDebugEnabled()) {// 打印所有日志
      LOGGER.debug("X-Forwarded-For:" + request.getHeader
        ("X-Forwarded-For") +
        "\tProxy-Client-IP:" + request.getHeader("Proxy-Client-IP") +
        "\t:WL-Proxy-Client-IP:" +
        request.getHeader("WL-Proxy-Client-IP") + "\tRemoteAddr:" + request
        .getRemoteAddr());
    }
    String ip;
    @SuppressWarnings("unchecked")
    Enumeration<String> xffs = request.getHeaders("X-Forwarded-For");
    if (xffs.hasMoreElements()) {
      String xff = xffs.nextElement();
      ip = resolveClientIPFromXFF(xff);
      if (isValidIP(ip)) {
        return ip;
      }
    }
    ip = request.getHeader("Proxy-Client-IP");
    if (isValidIP(ip)) {
      return ip;
    }
    ip = request.getHeader("WL-Proxy-Client-IP");
    if (isValidIP(ip)) {
      return ip;
    }
    return request.getRemoteAddr();
  }

  /**
   * 从X-Forwarded-For头部中获取客户端的真实IP。 X-Forwarded-For并不是RFC定义的标准HTTP请求Header
   * ，可以参考http://en.wikipedia.org/wiki/X-Forwarded-For
   *
   * @param xff X-Forwarded-For头部的值
   * @return 如果能够解析到client IP，则返回表示该IP的字符串，否则返回null
   */
  private String resolveClientIPFromXFF(String xff) {
    if (xff == null || xff.isEmpty()) {
      return null;
    }
    String[] ss = xff.split(",");
    for (int i = ss.length - 1; i >= 0; i--) {// x-forward-for链反向遍历
      String ip = ss[i].trim();
      if (isValidIP(ip)) {
        return ip;
      }
    }

    return null;
  }

  private static final Pattern ipPattern = Pattern.compile("([0-9]{1,3}\\.){3}[0-9]{1,3}");

  private boolean isValidIP(String ip) {
    if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {
      return false;
    }
    return ipPattern.matcher(ip).matches();
  }

  private Map<String, String> getRequestParamValueMap(HttpServletRequest request) {
    Map<String,String> param2value = new HashMap<>();
    Enumeration e = request.getParameterNames();
    String param;

    while(e.hasMoreElements()) {
      param = (String)e.nextElement();
      if(param != null) {
        String value = request.getParameter(param);
        if(value != null) {
          param2value.put(param, value);
        }
      }
    }

    return param2value;
  }
}

最后，需要应用这个拦截器：

@Configuration
@EnableWebMvc
public class ApiWebMvcConfig implements WebMvcConfigurer {

  @Bean
  public HandlerInterceptor getAccessLogInterceptor(){
    return new AccessLogInterceptor();
  }

  @Override
  public void addInterceptors(InterceptorRegistry registry) {
    registry.addInterceptor(getAccessLogInterceptor()).addPathPatterns("/**");
  }
}

总结：

以上，就是我这里实践的添加日志的两种的方式。现在公司项目使用的是第二种添加方式，毕竟打印的日志全一点。

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