Section 2: Core concepts (1-7)

"Consists of a set of nodes, which may be physically or virtual, on premise or on cloud, that host apps in the form of containers".

• Worker node

• Kubernetes cluster

• Master node

• Scheduler

"They are nodes that can load containers.".

• Worker node

• Kubernetes cluster

• Master node

• Scheduler

"It's responsible for managing the Kubernetes cluster, storing information regarding the different nodes".

• Worker node

• Kubernetes cluster

• Master node

• Scheduler

• Control plane components

The master node it's responsible for managing the Kubernetes cluster, storing information regarding the different nodes. The master node does all of these using a set of components known as the ________________.

Fill the blank space:

• Worker node

• Kubernetes cluster

• Master node

• Scheduler

• Control plane components

There are many containers being loaded and unloaded from the master/worker nodes on the daily basis. We need to maintain information about the different master/worker nodes, what container is on which node, and what time it was loaded. This is stored in a highly key value store, known as _________.

Fill the blank space:

• etcd

• Kubernetes cluster

• Master node

• Scheduler

• Control plane components

It identifies the right node to place a container based on the containers resource requirements, the worker nodes capacity, node affinity rules, etc...

• etcd

• Kubernetes cluster

• Master node

• Scheduler

• Control plane components

Which are some services/controller in a master node:

• Services controller

• Replication Controller

• Master controller

• Node Controller

• Container runtime

"It is the primary management component of Kubernetes. It's responsible of orchestrating all operations within the cluster. It exposes the Kubernetes API to the users to perform management operations in the cluster"

• Kubelet

• Kube-Proxy Service

• Kube API server

• Kube-scheduler

• etcd

"It's an agent (captain) that runs on each node in a cluster. It listens for Kube API server and deploys or destroys containers on the nodes as required."

• Kubelet

• Kube-Proxy Service

• Kube API server

• Kube-scheduler

• etcd

"It ensures the necessary rules are in place to enable communications between worker nodes, in this way, applications in different nodes can communicate each other"

• Kubelet

• Kube-Proxy Service

• Kube API server

• Kube-scheduler

• etcd