Quick Start¶

Install prerequisites¶

Please verify that you have properly installed the prerequisites.

Clone repo

git clone git@github.com:pawelmarkowski/kubernetes-learning.git

If you want to enable customized list of modules you can do it by defining proper vars ansible/inventories/training/group_vars/all.yml

Install requirements (ansible role microk8s) using ansible-galaxy.

ansible-galaxy role install -r ansible/playbooks/roles/requirements.yml --force

Run playbook (on localhost)

ansible-playbook -i ansible/inventories/training/hosts.yml ansible/playbooks/microk8s.yml --extra-vars "variable_host=localhost" -K

and voilà! MicroK8s is up, and running!

if you have config print: microk8s config and add it to .kube/config manually

cd $HOME
mkdir .kube
cd .kube
microk8s config > config

optionally, but I do not recommend that - you can specify alias for microk8s kubectl command:

vi ~/.bashrc
alias mkctl="sudo microk8s kubectl"

you can also specify default namespace

kubectl config set-context --current --namespace=<insert-namespace-name-here>

if you have multiple contexts in your configuration file, you can switch context (different K8s clusters) using:

kubectl config use-context <contextname>

kubectl get nodes

kubectl apply -f <file.yml>

kubectl edit deployment -n <namespace>

kubectl get deployments -n <namespace>

kubectl logs <podname>

Important - LoadBalancers does not work on microK8s

deployment is blueprint for creating the pods (all informations needed to create the pod). It manages a replicaset
replicaset automatically created, it manages the replicas of pods(we do not have to create or delete it, just use deployments)
pod is the smallest unit, abstraction of container

We manage deployment only. Everything "below" is managed by K8s.

basics of kubectl you can find here https://youtu.be/X48VuDVv0do?t=2715