Kubernetes fundamentals course

Slides and materials

All slides are on our website

Check the Framapad

Set up course platform

Pre-requisites

Set up local machine

• Ubuntu LTS is recommended
• 8 cores, 16 GB RAM, 30GB for the partition hosting docker entities (images, volumes, containers, etc). Use df command as below to find its size.

sudo df –sh /var/lib/docker # or /var/snap/docker/common/var-lib-docker/

• Internet access without proxy
• sudo access
• Install dependencies below:

sudo apt-get install curl docker.io git vim

# then add current user to docker group 
sudo usermod -a -G docker $USER
# command below, or restart gnome session
newgrp docker

However, depending on your linux distribution version, you might have to upgrade to docker-ce: https://docs.docker.com/install/linux/docker-ce/ubuntu/#install-docker-ce-1

Install kind cluster

Use automated procedure below (sudo access required)

git clone https://github.com/k8s-school/kind-helper
cd kind-helper
./k8s-create.sh -n <cluster-name>

or follow official instructions at: https://github.com/kubernetes-sigs/kind

Then validate Kubernetes is up and running

# Check k8s cluster is up and running
kubectl get nodes

# Launch an ubuntu pod from Docker Hub
kubectl run -it --rm  shell --image=ubuntu --restart=Never -- date

# Launch an other pod from gcr.io
kubectl run shell --image=gcr.io/kuar-demo/kuard-amd64:1 --restart=Never
# Open a shell inside it and exit
kubectl exec -it shell -- ash
exit
kubectl delete pod shell

Configure the k8s-school toolbox (i.e. Kubernetes client and tooling):

Follow official instructions at: https://github.com/k8s-school/k8s-toolbox#installation

Play with examples

Retrieve k8s-school's examples, demos and exercices by running script below inside toolbox container:

clone-school.sh
# Play with kubectl and yaml files :-)

Additional information

Free kubernetes icons

• https://github.com/kubernetes/community/tree/master/icons
• https://www.k8s-school.fr/resources/blog/3-k8s-official-icons/

Creating a single control-plane cluster with kubeadm

https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/