我正在尝试设置confluent kafka v5.4并运行prometheus JMX导出程序。我找到了这个关于如何获得此设置的博客https://alex.dzyoba.com/blog/jmx-exporter/。Kafka的设置和运行都很好，但端口8080上的端点什么也不返回。关于如何在systemd脚本中调用javaagent，我已经尝试了几乎所有的方法，但似乎都不起作用。
Description=Confluent Kafka Broker
After=network.target network-online.target remote-fs.target zookeeper.service
[Service]
Type=forking
User=confluent
Group=confluent
Environment="KAFKA_JMX_OPTS=-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -javaagent=/opt/prometheus/jmx_prometheus_javaagent.jar=8080:/opt/prometheus/config.yaml"
Environment=LOG_DIR=/var/log/confluent
ExecStart=/opt/confluent/confluent-5.4.0/bin/kafka-server-start -daemon /opt/confluent/confluent-5.4.0/etc/kafka/server.properties
ExecStop=/opt/confluent/confluent-5.4.0/bin/kafka-server-stop
SuccessExitStatus=143
[Install]
WantedBy=multi-user.target
关于如何在systemd脚本中调用java代理以使其正常工作，有什么想法吗？我尝试了多种调用OPTS的选项，但都不起作用。我已经尝试将-javaagent命令放在KAFKA_OPTS中。感觉我几乎试过了所有的选择。Kafka日志没有提供任何线索，我不确定在哪里可以查看此类问题的日志。
OS Centos 7 JMX导出器0.12.0 Java openJDK 11
我发现的日志并没有告诉我为什么它没有运行。也许我看错日志了。
编辑：
conflue+ 11578 47.4 13.8 8679808 536764 ? Sl 11:59 0:35 java -Xmx1G -Xms1G -server -XX:+UseG1GC -XX:MaxGCPauseMillis=20 -XX:InitiatingHeapOccupancyPercent=35 -XX:+ExplicitGCInvokesConcurrent -Djava.awt.headless=true -Xlog:gc*:file=/var/log/confluent/kafkaServer-gc.log:time,tags:filecount=10,filesize=102400 -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -javaagent=/opt/prometheus/jmx_prometheus_javaagent.jar=8080:/opt/prometheus/config.yaml -Dkafka.logs.dir=/var/log/confluent -Dlog4j.configuration=file:/etc/kafka/log4j.properties -cp /opt/confluent/confluent-5.4.0/bin/../ce-broker-plugins/build/libs/*:/opt/confluent/confluent-5.4.0/bin/../ce-broker-plugins/build/dependant-libs/*:/opt/confluent/confluent-5.4.0/bin/../ce-auth-providers/build/libs/*:/opt/confluent/confluent-5.4.0/bin/../ce-auth-providers/build/dependant-libs/*:/opt/confluent/confluent-5.4.0/bin/../ce-rest-server/build/libs/*:/opt/confluent/confluent-5.4.0/bin/../ce-rest-server/build/dependant-libs/*:/opt/confluent/confluent-5.4.0/bin/../ce-audit/build/libs/*:/opt/confluent/confluent-5.4.0/bin/../ce-audit/build/dependant-libs/*:/opt/confluent/confluent-5.4.0/bin/../share/java/kafka/*:/opt/confluent/confluent-5.4.0/bin/../share/java/confluent-metadata-service/*:/opt/confluent/confluent-5.4.0/bin/../share/java/rest-utils/*:/opt/confluent/confluent-5.4.0/bin/../share/java/confluent-common/*:/opt/confluent/confluent-5.4.0/bin/../share/java/confluent-security/schema-validator/*:/opt/confluent/confluent-5.4.0/bin/../support-metrics-client/build/dependant-libs-2.12.10/*:/opt/confluent/confluent-5.4.0/bin/../support-metrics-client/build/libs/*:/usr/share/java/support-metrics-client/*:/opt/confluent/confluent-5.4.0/bin/../support-metrics-fullcollector/build/dependant-libs-2.12.10/*:/opt/confluent/confluent-5.4.0/bin/../support-metrics-fullcollector/build/libs/*:/usr/share/java/support-metrics-fullcollector/* io.confluent.support.metrics.SupportedKafka /opt/confluent/confluent-5.4.0/etc/kafka/server.properties
确保每次编辑服务文件时都运行systemctl daemon-reload。
此外，我建议不要使用LOG_DIR，从log4j.properties中删除RollingFileAppender，然后让journalctl处理SystemD 中的所有日志记录
想明白了ExecStart=/opt/confluent/confluent-5.4.0/bin/kafka-server-start -daemon /opt/confluent/confluent-5.4.0/etc/kafka/server.properties
不正确
ExecStart=/opt/confluent/confluent-5.4.0/bin/kafka-server-start -daemon /etc/kafka/server.properties
是正确的，尽管2是符号连接的。