spring - 将特定的MDC字段追加到Logstash日志中

Question

我正在尝试将自定义字段添加到logback-spring.xml中的logstash追加程序中，如下所示:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="stash" class="net.logstash.logback.appender.LogstashSocketAppender">
        <host>xx.xx.xx.xx</host>
        <port>xxxxx</port>
        <encoder class="net.logstash.logback.encoder.LogstashEncoder">
            <includeMdcKeyName>myField</includeMdcKeyName>
        </encoder>
</appender>

<root level="info">
    <appender-ref ref="stash" />
</root>

</configuration>

它给我错误:

Exception in thread "main" java.lang.IllegalStateException: Logback configuration error detected: ERROR in ch.qos.logback.core.joran.spi.Interpreter@34:71 - no applicable action for [encoder], current ElementPath is [[configuration][appender][encoder]]

当我尝试控制台附加程序，并尝试打印该字段时，如下面的示例所示，它起作用了。

<layout>
      <Pattern>%-4r [%thread] %-5level My Field: [%X{myField:--}] %msg%n</Pattern>
</layout>

你能告诉我我对udp appender做错了什么吗？谢谢你的指教。

Answer 1

您使用的是UDP appender，它没有encoder。您应该使用TCP Appender(LogstashTcpSocketAppender而不是LogstashSocketAppender):

<appender name="stash" class="net.logstash.logback.appender.LogstashTcpSocketAppender">
    <destination>xx.xx.xx.xx:xxxxx</destination>
    <encoder class="net.logstash.logback.encoder.LogstashEncoder">
        <includeMdcKeyName>myField</includeMdcKeyName>
    </encoder>
</appender>

看看我创建了here的演示项目。

This code(Kotlin):

MDC.put("mdc", "so53558553")

LOG.warn("Warn")

用这样的 logback-spring.xml :

<appender name="logstash" class="net.logstash.logback.appender.LogstashTcpSocketAppender">
    <destination>localhost:5000</destination>
    <encoder class="net.logstash.logback.encoder.LogstashEncoder">
        <includeMdcKeyName>mdc</includeMdcKeyName>
    </encoder>
</appender>

在Logstash中产生这样的记录:

{
    "level_value" => 30000,
            "mdc" => "so53558553",
           "port" => 35450,
    "logger_name" => "by.dev.madhead.playgrounds.so53558553.SpringBootConsoleApplication",
           "host" => "172.17.0.1",
       "@version" => "1",
     "@timestamp" => 2018-12-03T01:16:28.793Z,
    "thread_name" => "main",
        "message" => "Warn",
          "level" => "WARN"
}

如您所见，Logstash将mdc值视为LoggingEvent中的一个字段。

编辑

由于ELK配置错误，您可能看不到Kibana中的字段。我将Logstash pipiline配置(/etc/logstash/conf.d/01-input.conf)粘贴仅供引用(这是非常基本的):

input {
    tcp {
        port => 5000
        codec => json_lines
    }
}

output {
    elasticsearch {
        hosts => [ "localhost:9200" ]
        index => "logback-%{+YYYY.MM.dd}"
    }
}

然后，我用logback-*模式在Kibana中配置了日志:




瞧: