Upgrade

Kubernetes upgrade notes: 1.20.x to 1.21.x 09-08

Kubernetes upgrade notes: 1.19.x to 1.20.x 06-29

Kubernetes upgrade notes: 1.18.x to 1.19.x 12-03

Kubernetes upgrade notes: 1.17.x to 1.18.x 06-29

Kubernetes upgrade notes: 1.16.x to 1.17.x 04-04

Kubernetes upgrade notes: 1.15.x to 1.16.x 11-14

Kubernetes upgrade notes: 1.14.x to 1.15.x 09-11

Kubernetes upgrade notes: 1.13.x to 1.14.x 05-16

Kubernetes the Not So Hard Way With Ansible - Upgrading Kubernetes 09-09