Dockerized DNS Performance Testing Tool

Integrated Items

• DNSPerf 2.9.0

Usage

To run dnsperf with default settings, use the command below:

$ docker run -it guessi/dnsperf:alpine

Or run dnsperf with customized settings:

$ docker run                              \
    -e MAX_TEST_SECONDS=60                \
    -e DNS_SERVER_ADDR=8.8.8.8            \
    -e MAX_QPS=1000                       \
    -it guessi/dnsperf:alpine

Or run dnsperf with customized testing data:

$ docker run                              \
    -v /path/to/files:/opt/records.txt:ro \
    -e MAX_TEST_SECONDS=60                \
    -e DNS_SERVER_ADDR=8.8.8.8            \
    -e MAX_QPS=1000                       \
    -it guessi/dnsperf:alpine

Benchmark inside Kubernetes system

apply pre-configured testing deployment/pods

$ kubectl apply -f ./bench/k8s-dnsperf-bench.yaml
configmap/dns-records-config created
deployment.apps/dnsperf-deployment created

make sure the deployment is running as expected

$ kubectl get deploy dnsperf-deployment
NAME                 READY   UP-TO-DATE   AVAILABLE   AGE
dnsperf-deployment   0/2     2            0           81s

find out the pod name

$ kubectl get po -l app=dnsperf
NAME                                  READY   STATUS    RESTARTS   AGE
dnsperf-deployment-5c5f65fc55-59pvl   1/1     Running   0          21s
dnsperf-deployment-5c5f65fc55-8bfhp   1/1     Running   0          21s

pick a pod for log output monitoring

$ kubectl logs -f dnsperf-deployment-5c5f65fc55-59pvl

wait for result output

DNS Performance Testing Tool
Version 2.9.0

[Status] Command line: dnsperf -l 60 -s 8.8.8.8 -Q 1000 -d /opt/records.txt
[Status] Sending queries (to 8.8.8.8:53)
[Status] Started at: Fri Mar  4 15:27:57 2022
[Status] Stopping after 60.000000 seconds
[Timeout] Query timed out: msg id 55720
[Timeout] Query timed out: msg id 56643
[Timeout] Query timed out: msg id 59821
[Status] Testing complete (time limit)

Statistics:

  Queries sent:         60000
  Queries completed:    59997 (100.00%)
  Queries lost:         3 (0.01%)

  Response codes:       NOERROR 59997 (100.00%)
  Average packet size:  request 32, response 50
  Run time (s):         60.003051
  Queries per second:   999.899155

  Average Latency (s):  0.007349 (min 0.002795, max 4154504685.515536)
  Latency StdDev (s):   0.023197

FAQ

Why is the pods shown as "CrashLoopBackOff"?

Pod will end its life once the `MAX_TEST_SECONDS` passed

Why is the pods restart interval so long?

Please refer to the FAQ of [Pod Lifecycle](https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/#restart-policy)

Reference

• https://www.dnsperf.com/