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Every minute, the dns test attempts to resolve redhat.com and times how long it takes.
An alert is triggered if dns resolution for the last 5 minutes averages above 200ms.
Note: These amounts reset each time the test is installed or restarted.
dns_latency_milliseconds- The time spent resolving dnsdns_failure_failure_total- The total number of dns errors encountered during tests
Installation of the exporter is a multi-step process. Step one is to use the provided Makefile to render various templates into OpenShift YAML manifests.
Use make to render the YAML manifests for the exporter.
Once these have been created the collection of manifests can be applied in the usual fashion (such as oc apply -f).
The Makefile includes three helpful targets:
clean- Delete any of the rendered manifest files which the Makefile rendersfilelist- Echos to the terminal a list of all the YAML files in thedeploydirectoryresourcelist- Echos to the terminal a list of OpenShift/Kubernetes objects created by the manifests in thedeploydirectory, which may be useful for those wishing to delete the installation of this monitor.
Rules are provided by the openshift/managed-cluster-config repository.