Using Kubernetes on the public cloud is flexible and scalable for your application. AWS is one of the most popular services in the public cloud industry. In this chapter, you'll learn what AWS is and how to set up Kubernetes on AWS along with the following topics:
When you run your application on the public network, you need an infrastructure such as networks, Virtual Machines (VMs), and storage. Obviously, companies borrow or build their own data center to prepare those infrastructures, and then hire data center engineers and operators to monitor and manage those resources.
However, purchasing and maintaining those assets requires a large capital expense as well as an operational expense for data center engineers/operators. You also need a lead time to fully set up those infrastructures, such as buying a server, mounting to a data center rack, cabling a network, and then the initial configuration/installation of the OS and so on.
Consequently, rapidly allocating an infrastructure with appropriate resource capacity is one of the important factors that dictates the success of your business.
To make infrastructure management...
We've discussed some AWS components that are quite easy for setting up networks, virtual machines, storage, and load balancers. Consequently, there are a variety of ways to set up Kubernetes on AWS such as kubeadm (https://github.com/kubernetes/kubeadm), kops (https://github.com/kubernetes/kops), and kubespray (https://github.com/kubernetes-sigs/kubespray).
In addition, since June 2018, AWS starts to provide a new Service, which is called Amazon Elastic Container Service for Kubernetes (https://aws.amazon.com/eks/), in short EKS. This is similar to Google Kubernetes Engine (https://cloud.google.com/kubernetes-engine/) and Azure Kubernetes Service (https://docs.microsoft.com/en-us/azure/aks/), the managed Kubernetes service.
In this chapter, we discussed the public cloud. AWS is the most popular public cloud service and it gives APIs the ability to control AWS infrastructure programmatically.
In addition, AWS EKS makes it easy to deploy Kubernetes on AWS. Furthermore, the control plane manages the master and etcd with high availability design that offloads huge management efforts.
On the other hand, you need to be aware of AWS basics such as availability zone awareness between pod (EC2) and persistent volume (EBS). In addition, you need intermediate AWS knowledge such as IAM credentials to gain access to an API server and use a worker node Instance Role ARN to register the cluster.
In addition, using ALB as ingress controller is available as of December 2018 (https://aws.amazon.com/blogs/opensource/kubernetes-ingress-aws-alb-ingress-controller/), but it also requires additional effort to configure...
© 2019 Packt Publishing Limited All Rights Reserved
