问题
I want to enable kafka monitoring and I am starting with single node deployment as test. I am following steps from https://alex.dzyoba.com/blog/jmx-exporter/
i tried following steps; the last command which checks for jmx-exporter HTTP server reports blank. i believe this is the reason, why I am not seeing metrics from kafka.(more on this below)
wget https://repo1.maven.org/maven2/io/prometheus/jmx/jmx_prometheus_javaagent/0.6/jmx_prometheus_javaagent-0.6.jar
wget https://raw.githubusercontent.com/prometheus/jmx_exporter/master/example_configs/kafka-0-8-2.yml
export KAFKA_OPTS='-javaagent:/opt/jmx-exporter/jmx_prometheus_javaagent-0.6.jar=7071:/etc/jmx-exporter/kafka-0-8-2.yml'
/opt/kafka_2.11-0.10.1.0/bin/kafka-server-start.sh /opt/kafka_2.11-0.10.1.0/conf/server.properties
netstat -plntu | grep 7071
kafka broker log on console does not have any ERROR message.
i have Prometheus running in a container and http://IP:9090/metrics shows bunch of metrics. when i searched for "kafka" it returned following
# TYPE net_conntrack_dialer_conn_attempted_total counter
net_conntrack_dialer_conn_attempted_total{dialer_name="kafka"} 79
# TYPE net_conntrack_dialer_conn_closed_total counter
net_conntrack_dialer_conn_closed_total{dialer_name="kafka"} 0
net_conntrack_dialer_conn_established_total{dialer_name="kafka"} 0
# TYPE net_conntrack_dialer_conn_failed_total counter
net_conntrack_dialer_conn_failed_total{dialer_name="kafka",reason="refused"} 79
net_conntrack_dialer_conn_failed_total{dialer_name="kafka",reason="resolution"} 0
net_conntrack_dialer_conn_failed_total{dialer_name="kafka",reason="timeout"} 0
net_conntrack_dialer_conn_failed_total{dialer_name="kafka",reason="unknown"} 79
# TYPE prometheus_sd_discovered_targets gauge
prometheus_sd_discovered_targets{config="kafka",name="scrape"} 1
# HELP prometheus_target_sync_length_seconds Actual interval to sync the scrape pool.
# TYPE prometheus_target_sync_length_seconds summary
prometheus_target_sync_length_seconds{scrape_job="kafka",quantile="0.01"} NaN
prometheus_target_sync_length_seconds{scrape_job="kafka",quantile="0.05"} NaN
prometheus_target_sync_length_seconds{scrape_job="kafka",quantile="0.5"} NaN
prometheus_target_sync_length_seconds{scrape_job="kafka",quantile="0.9"} NaN
prometheus_target_sync_length_seconds{scrape_job="kafka",quantile="0.99"} NaN
prometheus_target_sync_length_seconds_sum{scrape_job="kafka"} 0.000198245
prometheus_target_sync_length_seconds_count{scrape_job="kafka"} 1
My guess is prometheous is not getting any metrics on port 7071; which aligns with earlier finding that JMX server is not respond on port 7071.
can you help me enabling kafka monitoring using JMX-exporter and Prometheus?
回答1:
I have Prometheus running in a container
You need to configure Prometheus to scrape your external LAN IP, then because you're running Kafka outside of a container.
You can see on this line that the connection is being refused with your current setup
net_conntrack_dialer_conn_failed_total{dialer_name="kafka",reason="refused"} 79
You should either run Prometheus on your host and scrape localhost:7071
Or run Kafka in a container if you want kafka:7071 to be discoverable by Prometheus
来源：https://stackoverflow.com/questions/58033823/configuring-kafka-with-jmx-exporter-centos-7