Pods can't connect to Elasticsearch service (logging-es) in OpenShift 3.x

Solution Verified - Updated -

Issue

  • Elasticsearch pod is running and working, but fluentd, kibana and curator can't connect to it, showing the errors:

    fluentd:

    [warn]: Could not push logs to Elasticsearch, resetting connection and trying again. No route to host - connect(2) (Errno::EHOSTUNREACH)

    curator:

    Was not able to connect to Elasticearch at logging-es:9200 within 60 attempts

  • Pods can't connect to a service IP with error No route to host.

Environment

  • Red Hat OpenShift Container Platform (OCP) 3.x

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