docker_monitor showing localhost in docker profile

Products

• DX Infrastructure Management
• NIMSOFT PROBES

Issue/Introduction

docker_monitor 1.47 has localhost come up as the docker instance as opposed to the actual system name. It's not loading any details for the docker instance.

Cause

Found this in the docker_monitor.log file:

May 06 18:10:41:875 [Data Collector - clboh-sensor-h1, docker_monitor] Unexpected fatal error occurred during data collection against DataCollector for clboh-sensor-h1
May 06 18:10:41:876 [Data Collector - clboh-sensor-h1, docker_monitor] java.lang.ExceptionInInitializerError
    at com.nimsoft.vm.collector.StandardDeliverer.newNimQos(StandardDeliverer.java:445)
    at com.nimsoft.vm.collector.StandardDeliverer.sendNimQoS(StandardDeliverer.java:260)
    at com.nimsoft.vm.collector.StandardDeliverer.deliver(StandardDeliverer.java:96)
    at com.nimsoft.probe.common.ctd.ProbeDataCollector.deliver(ProbeDataCollector.java:178)
    at com.nimsoft.probe.common.ctd.ProbeDataCollector.collectData(ProbeDataCollector.java:715)
    at com.nimsoft.probe.common.ctd.ProbeDataCollector.execute(ProbeDataCollector.java:255)
    at com.nimsoft.probe.framework.genprobe.GenProbeDataCollector.execute(GenProbeDataCollector.java:36)
    at com.nimsoft.vm.collector.DataCollector.run(DataCollector.java:151)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: (2) communication error, UnknownHostException: clboh-sensor-h1: clboh-sensor-h1: Name or service not known

The "Name or service not known" indicates an issue resolving the host "clboh-sensor-h1".

Environment

docker_monitor 1.47
Robot OS: Linux

Resolution

Review the /etc/host file.  Confirm that the entries for the host are all accurate and up-to-date.