使用logstash结合logback收集微服务日志

因为公司开发环境没有装elk，所以每次查看各个微服务的日志只能使用如下命令

这样子访问日志是并不方便，于是想为每个微服务的日志都用logstash收集到一个文件out中，那以后只要输出这个文件则可查看所有的日志

• 结合logback和logstash收集日志

1.为需要收集日志的微服务引入logstash-logback-encode依赖

//用logstash收集logback
	compile 'net.logstash.logback:logstash-logback-encoder:5.2'

2.编写logback.xml并设置appender指定logstash的ip端口

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <include resource="org/springframework/boot/logging/logback/base.xml"/>
  <appender name="stash" class="net.logstash.logback.appender.LogstashTcpSocketAppender">
    <destination>127.0.0.1:9100</destination>
    <includeCallerData>true</includeCallerData>

    <encoder class="net.logstash.logback.encoder.LogstashEncoder">
      <includeCallerData>true</includeCallerData>
    </encoder>
  </appender>

  <appender name="FILE" class="ch.qos.logback.core.FileAppender">
    <file>log/weather.log</file>
    <append>true</append>
    <encoder>
      <pattern>%-4relative [%thread] %-5level %logger{35} - %msg%n</pattern>
    </encoder>
  </appender>

  <logger name="com.wugui" level="info" additivity="false">
    <appender-ref ref="CONSOLE"/>
    <appender-ref ref="stash" />
    <appender-ref ref="FILE"/>
  </logger>

  <logger name="com.wugui.spring.cloud.weather.Service" level="debug" additivity="false">
    <appender-ref ref="CONSOLE"/>
    <appender-ref ref="stash" />
  </logger>

</configuration>

3.编写logstash启动引用的配置文件test.conf

input {
	tcp {
	##host:port就是上面appender中的 destination，这里其实把logstash作为服务，开启9250端口接收logback发出的消息
	host => "127.0.0.1"
	port => 9100
	mode => "server"
	tags => ["tags"]
	codec => json_lines
	}
}
output {
	stdout { codec => rubydebug }
	#输出到es
	elasticsearch { hosts => "127.0.0.1:9200" }
        #输出到一个文件中
	file {
	   path => "D:/study/springcloud_house/ELK/logstash-6.1.1/out"
	   codec => line
	}
}

4.用powershell启动Logstash并引用自定义配置文件

.\bin\logstash -f test.conf

5.运行微服务，可观察到logstash控制台在输出收集到的日志

注意：

当使用springBootVersion =2.0.1.RELEASE时，引用依赖compile 'net.logstash.logback:logstash-logback-encoder:4.7'会报错，报错信息如下：

ERROR in net.logstash.logback.appender.LogstashTcpSocketAppender[stash] - Unable start disruptor java.lang.NoSuchMethodError: ch.qos.logback.core.encoder.Encoder.init(Ljava/io/OutputStream;)V
	at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:166)
	at org.springframework.boot.logging.logback.LogbackLoggingSystem.reinitialize(LogbackLoggingSystem.java:212)
	at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithConventions(AbstractLoggingSystem.java:75)
	at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:60)
	at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:114)
	at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:264)
	at org.springframework.boot.context.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:237)
	at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:200)
	at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:173)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:127)
	at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:74)
	at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54)
	at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:358)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:317)
	at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:137)
	at org.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext(BootstrapApplicationListener.java:197)
	at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:104)
	at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:70)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:127)
	at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:74)
	at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54)
	at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:358)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:317)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243)
	at com.wugui.spring.cloud.weather.Application.main(Application.java:14)

解决办法：引入最新的logstash-logback-encoder依赖即可

compile 'net.logstash.logback:logstash-logback-encoder:5.2'