Kubernetes Terms

Question 1

A template of a container with the software that needs to be run.

Answer 1

Image

Question 2

A cloud server (e.g., EC2 instance, virtual machine).

Answer 2

Server instance/node

Question 3

An instance of a container image; you can have multiple copies of the same image running at the same time.

Answer 3

Container

Question 4

Key/value pairs that can identify attributes of objects that are meaningful and relevant to users, but do not directly imply semantics to the core system. Each object can have a set of key/value labels defined. Each Key must be unique for a given object. These can be helpful when you want to group more than one namespace, for example.

Answer 4

Pod labels

Question 5

Another Kubernetes concept, a namespace is a virtual cluster where pods/containers can be deployed separately from other namespaces.

Answer 5

Namespace

Question 6

This is a Kubernetes concept. A pod consists of a group of containers and treats them as a single block of resources that can be scheduled and scaled on the cluster.

Answer 6

Pod

Question 7

An orchestrator manages the cluster of server instances, and also maintains the lifecycle of containers/pods. Part of the container orchestrator is the scheduler, which schedules a container/pod to run on a server instance. Examples include Kubernetes or AWS ECS.

Answer 7

Container orchestration

Question 8

A group of server instances, managed by container orchestration.

Answer 8

Cluster