Kubernetes

Kubernetes is a container orchestration engine

Basic terminology

node: A single VM or physical machine running kubernetes. There can be master nodes and worker nodes
pods: smallest deployable unit in a cluster. can consist of multiple containers
replica set: gurantees a number of pods are up at any given time
deployments: defines a desired state of pods. uses replication controllers
services: rules to expose a deployment. provides virtual network addresses
volumes: provides persistency and file sharing between pods
namespace: a way to split a cluster into seperate virtual clusters

get x -o wide [ get more info , eg for pods show its ip]
create x -o yaml --dry-run > file.yml , edit and apply back
helm inspect values stable/nnextcloud > values.yml gets the values file
helm install my_name -f values.yml to specify the values file
service: type NodePort to use in ingress controller
persistentvolumeclaims to create claims, which can be fullfilled by the provider
port-forward <resource> locport:remoteport
kubectl edit <resource> : easy editing deployments
kubectl exec -it bash : interactive terminal
kubectl explain <resource> [ --recursive ] : short documentation on resource
kubectl get resourcequota : get limits for each resource