出现错误：LOGBACK：没有为 net.logstash.logback.LogstashFormatter 提供上下文

Question

我尝试使用 Logback 和以下配置在 SpringBoot 应用程序中打印日志，但日志未打印。 正在使用 Spring-boot 版本 2.7.2 和 Java 版本 17。

在pom.xml中

<dependency>
    <groupId>net.logstash.logback</groupId>
    <artifactId>logstash-logback-encoder</artifactId>
    <version>6.6</version>
</dependency>

在 logback-spring.xml 中，我给出了从 application.yml 文件引用的属性。

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

    <springProperty scope="context" name="APP_NAME" source="spring.application.name"/>
    <springProperty scope="context" name="LOG_ROOT_PATH" source="log.root.path"/>
    <property name="HOME_LOG" value="${LOG_ROOT_PATH}/logs/${APP_NAME}/${APP_NAME}.json"/>

    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>
                %d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n
            </Pattern>
        </layout>
    </appender>

    <appender name="FILE-ROLLING" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${HOME_LOG}</file>

        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <fileNamePattern>${LOG_ROOT_PATH}/logs/${APP_NAME}/archived/${APP_NAME}.%d{yyyy-MM-dd}.%i.json</fileNamePattern>
            <!-- each archived file, size max 10MB -->
            <maxFileSize>10MB</maxFileSize>
            <totalSizeCap>2GB</totalSizeCap>
            <maxHistory>60</maxHistory>
        </rollingPolicy>

        <encoder class="net.logstash.logback.encoder.LogstashEncoder">
            <providers>
                <pattern>
                    <pattern>
                        {
                            "timestamp": "%d{ISO8601}",
                            "trace": "%X{traceId:-}",
                            "span": "%X{spanId:-}",
                            "level": "%level",
                            "logger": "%logger",
                            "thread": "%thread",
                            "application": "${APP_NAME}",
                            "message": "%msg"
                        }
                    </pattern>
                </pattern>
            </providers>
    </encoder>
    </appender>

    <logger name="com.til" level="debug" additivity="false">
        <appender-ref ref="FILE-ROLLING"/>
        <appender-ref ref="CONSOLE" />
    </logger>

    <root level="info">
        <appender-ref ref="FILE-ROLLING"/>
        <appender-ref ref="CONSOLE" />
    </root>
</configuration>

请帮忙。 谢谢

Answer 1

我对 LogstashEncoder 也有同样的问题。经过大量挖掘后，我配置了它对我有用的 LoggingEventCompositeJsonEncoder 自述文件

logstash-logback-encoder

将帮助您配置编码器。 我的最终结果是：

<appender name="json" class="ch.qos.logback.core.ConsoleAppender">
    <encoder class="net.logstash.logback.encoder.LoggingEventCompositeJsonEncoder">
        <providers>
            <timestamp>
                <fieldName>@timestamp</fieldName>
                <timeZone>UTC</timeZone>
            </timestamp>
            <version>
                <fieldName>@version</fieldName>
            </version>
            <logLevel>
                <fieldName>level</fieldName>
            </logLevel>
            <loggerName>
                <fieldName>logger_name</fieldName>
            </loggerName>
            <callerData>
                <classFieldName>class</classFieldName>
                <methodFieldName>method</methodFieldName>
                <lineFieldName>line</lineFieldName>
                <fileFieldName>file</fileFieldName>
            </callerData>
            <threadName>
                <fieldName>thread_name</fieldName>
            </threadName>
            <message>
                <fieldName>message</fieldName>
            </message>
            <pattern> <!-- Custom Fields -->
                <pattern>{
                    "hostname": "${HOSTNAME}",
                    "application": "${APP_NAME}",
                    "root_path": "${LOG_ROOT_PATH}"
                    }</pattern>
            </pattern>
            <mdc />
            <arguments>
<includeNonStructuredArguments>false</includeNonStructuredArguments>
            </arguments>
            <stackTrace>
                <fieldName>stack</fieldName>
            </stackTrace>
        </providers>
    </encoder>
</appender>

另外，如果您想创建嵌套路径，请检查此 stackOverflow 答案：How do Iwrapper of some of the messages of Logstash Logback Encoder into an inside field?

希望这有帮助！