Chapter 9

1. a and b: Kubernetes requires etcd to work. Most of the Kubernetes deployment solutions will deploy etcd for you, but it is an external application and therefore it is up to you to manage and ensure that the key-value solution provides high availability. Kubernetes internal networking will work out of the box, but communications between components deployed on different hosts rely on external plugins (the CNI standard). Therefore, we will need to choose and deploy ourselves a solution to provide this kind of communication.
2. b and c: We will deploy pods in Kubernetes, hence these are the minimum unit of deployment. We can deploy more than one container in a pod. The container density is higher in Kubernetes. Scaling pods will replicate all their components at once.
3. d: All sentences are true. All containers in a pod share the same IP address and localhost. They also share pod volumes. Container Network Interface (CNI) is not required for connections between pods running on the same...