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JVM monitoring in a Docker environment
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| public final class BusyApp { | |
| public static void main(String []args) throws Exception { | |
| final java.util.Random generator = new java.util.Random(); | |
| while (true) { | |
| generator.ints(1000000, 0, 100).sorted(); | |
| Thread.sleep(5000L); | |
| } | |
| } | |
| } |
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| jvmapp: | |
| build: . | |
| dockerfile: Dockerfile-jvmapp | |
| container_name: jvmapp | |
| environment: | |
| JMX_HOST: jvmapp | |
| JMX_PORT: 4000 | |
| ports: | |
| - "4000:4000" | |
| jmxtrans: | |
| build: . | |
| dockerfile: Dockerfile-jmxtrans | |
| container_name: jmxtrans | |
| environment: | |
| JMX_HOST: jvmapp | |
| JMX_PORT: 4000 | |
| STATSD_HOST: dashboard | |
| STATSD_PORT: 8125 | |
| links: | |
| - jvmapp | |
| - dashboard | |
| dashboard: | |
| image: kamon/grafana_graphite | |
| container_name: dashboard | |
| ports: | |
| - "80:80" | |
| - "81:81" | |
| - "8125:8125/udp" | |
| - "8126:8126" |
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| FROM openjdk:8 | |
| RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections | |
| RUN wget http://central.maven.org/maven2/org/jmxtrans/jmxtrans/259/jmxtrans-259.deb | |
| RUN dpkg -i jmxtrans-259.deb | |
| COPY run-jmxtrans.sh /run-jmxtrans.sh | |
| RUN chmod 755 /run-jmxtrans.sh | |
| CMD /run-jmxtrans.sh |
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| FROM openjdk:8 | |
| COPY BusyApp.java /BusyApp.java | |
| RUN javac BusyApp.java | |
| ENV JMX_HOST=jvm-app | |
| ENV JMX_PORT=4000 | |
| CMD java \ | |
| -Djava.rmi.server.hostname=$JMX_HOST \ | |
| -Dcom.sun.management.jmxremote \ | |
| -Dcom.sun.management.jmxremote.port=$JMX_PORT \ | |
| -Dcom.sun.management.jmxremote.rmi.port=$JMX_PORT \ | |
| -Dcom.sun.management.jmxremote.local.only=false \ | |
| -Dcom.sun.management.jmxremote.authenticate=false \ | |
| -Dcom.sun.management.jmxremote.ssl=false \ | |
| BusyApp |
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| #!/bin/bash | |
| JMXTRANS_HEAP_SIZE=${JMXTRANS_HEAP_SIZE:-"512"} | |
| JMXTRANS_LOG_LEVEL=${JMXTRANS_LOG_LEVEL:-"info"} | |
| JMXTRANS_PERIOD=${JMXTRANS_PERIOD:-"10"} | |
| JMXTRANS_JAR="/usr/share/jmxtrans/lib/jmxtrans-all.jar" | |
| JMXTRANS_CONFIG="/jmxtrans-config.json" | |
| cat <<EOF > $JMXTRANS_CONFIG | |
| { | |
| "servers": [ | |
| { | |
| "host": "${JMX_HOST}", | |
| "port": "${JMX_PORT}", | |
| "queries": [ | |
| { | |
| "obj": "java.lang:type=Memory", | |
| "attr": [ "HeapMemoryUsage", "NonHeapMemoryUsage" ], | |
| "outputWriters": [ | |
| { | |
| "@class": "com.googlecode.jmxtrans.model.output.StdOutWriter" | |
| }, | |
| { | |
| "@class": "com.googlecode.jmxtrans.model.output.StatsDWriterFactory", | |
| "host": "${STATSD_HOST}", | |
| "port": "${STATSD_PORT}", | |
| "bucketType" : "c" | |
| } | |
| ] | |
| } | |
| ] | |
| } | |
| ] | |
| } | |
| EOF | |
| JAVA_OPTS="-Xms${JMXTRANS_HEAP_SIZE}m -Xmx${JMXTRANS_HEAP_SIZE}m -Djava.awt.headless=true -Djava.net.preferIPv4Stack=true" | |
| JMXTRANS_OPTS="-Djmxtrans.log.level=${JMXTRANS_LOG_LEVEL}" | |
| MONITOR_OPTS="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.port=${JMX_PORT}" | |
| EXEC="-jar $JMXTRANS_JAR -e -f $JMXTRANS_CONFIG -s $JMXTRANS_PERIOD -c false" | |
| java -server $JAVA_OPTS $JMXTRANS_OPTS $MONITOR_OPTS $EXEC |
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