Kafka 的 Prometheus JMX Exporter java 代理無法運行

Question

我正在嘗試設置 confluent kafka v5.4 並運行 prometheus JMX 導出器。 我找到了這篇博客，了解如何獲取此設置https://alex.dzyoba.com/blog/jmx-exporter/ 。 Kafka 已設置並運行良好，但端口 8080 上的端點沒有返回任何內容。 我已經嘗試了關於如何在 systemd 腳本中調用 javaagent 的所有方法，但似乎沒有任何效果。

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

關於如何在 systemd 腳本中調用 java 代理以使其正常工作的任何想法？ 我嘗試了多種調用 OPTS 的選項，但它們都不起作用。 我嘗試將 -javaagent 命令放入 KAFKA_OPTS。 感覺就像我已經嘗試了幾乎所有選項。 Kafka 日志沒有提供任何線索，我不確定在哪里可以查看此類問題的日志。

操作系統 Centos 7 JMX 導出器 0.12.0 Java openJDK 11

我發現的日志並沒有告訴我為什么它沒有運行。 也許我正在查看錯誤的日志。

編輯：

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

Answer 1

確保每次編輯服務文件時都運行systemctl daemon-reload 。

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另外，我建議不要使用LOG_DIR ，從log4j.properties中刪除 RollingFileAppender ，然后讓journalctl處理來自 SystemD 的所有日志記錄

Answer 2

想通了ExecStart=/opt/confluent/confluent-5.4.0/bin/kafka-server-start -daemon /opt/confluent/confluent-5.4.0/etc/kafka/server.properties

不正確

ExecStart=/opt/confluent/confluent-5.4.0/bin/kafka-server-start -daemon /etc/kafka/server.properties

是正確的，即使 2 是符號鏈接的。