Kubernetes

Introduction

Pods are collections of docker containers. Can be just one docker container or more

Nodes are where pods are deployed. Could be one node, or more.

Cluster is a collection of nodes

Developed by developers of k8s.

Developed by Rancher

systemctl status k3s
systemctl stop k3s
systemctl start k3s

Developed by Canonical.

Might need to change firewall rules

https://ubuntu.com/tutorials/install-a-local-kubernetes-with-microk8s#2-deploying-microk8s

If need to hard reset

sudo microk8s reset --destroy-storage
sudo microk8s kubectl delete --all deployments --namespace=foo

Enable things. Registry allows the use of local Docker builds.

sudo microk8s enable dns dashboard storage registry

check all running

microk8s kubectl get all --all-namespaces

read off ip of dashboard. go to https://ip:443

get token

sudo microk8s config

Enable loadbalancer. Separate as asks questions.

sudo microk8s enable metallb

Run dashboard. Go to IP and port for service/kubernetes-dashboard.

sudo microk8s dashboard-proxy

using kompose to convert docker-compose file to kubernetes file First convert the docker compose file to a kubernetes file.

kompose --file docker-compose.yml --build convert

But change image name to local


    spec:
      containers:
      - image: localhost:32000/homepage-nodejs