Kubernetes中POD的预定扩展 [英] Scheduled scaling for PODs in Kubernetes

问题描述

我有一个可扩展的部署，可预测的负载变化取决于时间.如何使部署准备好进行加载(例如，我想每天晚上16:00至23:00将Pod数量加倍).Kubernetes是否提供这种工具?

I have a scaled deployment with predictable load change depends on time. How can I make my deployment prepared to the load (for example, I want to double pods number every evening from 16:00 to 23:00). Does Kubernetes provides such tool?

我知道Kubernetes吊舱正在使用水平吊舱自动缩放器，可根据CPU利用率或自定义指标来缩放广告连播的数量.但这是被动的方法，我正在寻找主动的方法.

I know Kubernetes pods are scaling with Horizontal Pod Autoscaler, which scales the number of pods based on CPU utilisation or custom metric. But it is reactive approach, I'm looking for proactive.

推荐答案

通过Google进行快速搜索可以将您引导至此处:

A quick google search would direct you here: https://github.com/kubernetes/kubernetes/issues/49931

从本质上讲，到目前为止，最好的解决方案是为pod的主容器运行一个sidecar容器，该容器可以使用kubernetes api通过一个简单的bash脚本根据时间段自行扩展，或者编写CRD自己对基于时间的事件做出反应(现在是下午6点)，就像这样:

In essence the best solution as of now, is to either run a sidecar container for your pod's main container, which could use the kubernetes api to scale itself up based on a time period with a simple bash script, or write a CRD yourself that reacts to time based events (it is 6pm), something like this one:

https://github.com/amelbakry/kube-schedule-scaler

监视具有类似cron规范的部署注释，并做出相应的反应.

which watches annotations with cron-like specs on deployments and reacts accordingly.

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