DNS性能测试与Kubernetes Pods —— 筑梦之路

此处主要介绍如何测试k8s集群的dns解析性能，更加深入学习了解k8s。

检查coredns版本

kubectl get deployments coredns -n kube-system -o jsonpath='{$.spec.template.spec.containers[0].image}'

检查coredns配置文件

kubectl get configmap coredns -n kube-system -o jsonpath='{$.data.Corefile}'

检查coredns资源配置

kubectl get deployments coredns -n kube-system -o jsonpath='{$.spec.template.spec.containers[0].resources}'

部署基准测试

kubectl apply -f https://raw.githubusercontent.com/guessi/dnsperf-bench/master/k8s-dnsperf-bench.yaml

configmap/dns-records-config created
deployment.apps/dnsperf created

检查k8s集群dns

kubectl get service kube-dns -n kube-system -o jsonpath='{$.spec.clusterIP}'

修改deploy中的dns为本地的

kubectl edit deployment dnsperf

检查基准测试结果

kubectl logs -f deployments/dnsperf

DNS Performance Testing Tool
Version 2.14.0

[Status] Command line: dnsperf -f any -m udp -s 223.5.5.5 -p 53 -d /opt/records.txt -c 1 -T 1 -l 30 -t 5 -Q 100000
[Status] Sending queries (to 223.5.5.5:53)
[Status] Started at: Thu Apr 1 10:47:46 2024
[Status] Stopping after 30.000000 seconds
[Status] Testing complete (time limit)

Statistics:

  Queries sent:         517317
  Queries completed:    517317 (100.00%)
  Queries lost:         0 (0.00%)

  Response codes:       NOERROR 517317 (100.00%)
  Average packet size:  request 43, response 160
  Run time (s):         30.004152
  Queries per second:   17241.513774

  Average Latency (s):  0.004805 (min 0.000101, max 0.029327)
  Latency StdDev (s):   0.002537

DNS Performance - Compare the speed and uptime of enterprise and commercial DNS services | DNSPerf