Chapter 20: Autoscaling Kubernetes Pods and Nodes

Needless to say, having autoscaling capabilities for your cloud-native application is considered the holy grail of running applications in cloud. In short, by autoscaling, we mean a method to automatically and dynamically adjust the amount of computational resources, such as CPU and RAM memory, available to your application. The goal of it is to cleverly add or remove available resources based on the activity and demand of end users. So, for example, the application may require more CPU and RAM memory during daytime hours, when users are most active, but much less during the night. Similarly, if you are running an e-commerce business, you can expect a huge spike in demand during so-called Black Friday. In this way, you can not only provide a better, highly available service to users but also reduce your cost of goods sold (COGS) for the business. The fewer resources you consume in the cloud, the less you pay, and the business can invest...