Kubernetes

Basic

Node A node is a computer. Also called minion. Cluster: A set of nodes working together Master: A node with kubernetes installed and master desigination. Has etcd, controller and scheduler. Kubelet: Agent responsible for the containter running on the nodes. Kubectl: Command line interface. Controller Noticinf and responding when nodes go down. etcd: Stored all infomraitnon of all nodes. No conflict. pod: smallest instance of a pod. pods run on a node. Pods have a 1-1 relationship with containers. You do not add multiple containers to a single pod. You can have multiple containers in a pod but not recommened.

ReplicaSet

New way of creating replicationcontroler.

Taints & Tolerances

Taints can be set on a cli level, but

CLI Tools

Kubectl

crictl

Links

• Docker: Relevant for Kubernetes Docker Deep Dive.
• Certified Kubernetes Application Developer

Thoughts

• Kubernetes was from Google, and was part of the orchestration wars of 2010s. Competing with Docker Swarm and Hashicorp Nomad, Kubernetes came out on top.
• to remove a taint from a node, you need to append the ”-” sign after it.