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测试HPA
K8S
2024-01-10 17:34:36
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K8S
[TOC] # 创建deploy和service ``` $ kubectl run php-apache --image=pilchard/hpa-example --requests=cpu=200m --expose --port=80 ``` # 创建autoscaler ``` $ kubectl autoscale deploy php-apache --cpu-percent=50 --min=1 --max=10 ``` # 等待3~5分钟查看hpa状态 ``` $ kubectl get hpa php-apache NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE php-apache Deployment/php-apache 0% / 50% 1 10 1 3m ``` # 增加负载 ``` $ kubectl run --rm -it load-generator --image=busybox /bin/sh Hit enter for command prompt $ while true; do wget -q -O- http://php-apache; done; ``` # 等待约5分钟查看hpa显示负载增加，且副本数目增加为4 ``` $ kubectl get hpa php-apache NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE php-apache Deployment/php-apache 430% / 50% 1 10 4 4m ``` # 注意k8s为了避免频繁增删pod，对副本的增加速度有限制 # 实验过程可以看到副本数目从1到4到8到10，大概都需要4~5分钟的缓冲期 ``` $ kubectl get hpa php-apache NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE php-apache Deployment/php-apache 86% / 50% 1 10 8 9m $ kubectl get hpa php-apache NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE php-apache Deployment/php-apache 52% / 50% 1 10 10 12m ``` # 清除负载，CTRL+C 结束上述循环程序，稍后副本数目变回1 ``` $ kubectl get hpa php-apache NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE php-apache Deployment/php-apache 0% / 50% 1 10 1 17m ```
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