Kubernetes Beginners Workshop

Slides

Prerequisites

• kubectl is installed (https://kubernetes.io/docs/tasks/tools/)

• Kubernetes Cluster

  • minikube
  • microk8s
  • Vendevio Dev Cluster rancher-dev

Cheat Sheet

kubectl get all -n <namespace>

kubectl get <kind> <name>

kubectl describe <kind>/<name>

kubectl logs -f <pod-name>

kubectl port-forward pod/<pod-name> 8080:80

kubectl exec -ti <pod-name> -- /bin/bash

kubectl apply -f config.yml

kubectl delete -f config.yml

Exercises

01 - Namespaces

kubectl create namespace <first-name>

kubectl delete namespace <first-name>

kubectl apply -f namespace.yml

02 - Deployment

=>  Deployment Name
=>  Image: nginxdemos/hello:0.1

kubectl apply -n <first-name> -f Exercises/02-Deployment/deployment.yml 

=>  replicas: 3

=> nginxdemos/hello:0.2

kubectl get pods -n <first-name>
kubectl port-forward -n <first-name> pod/<pod-name> 8080:80

03 - Services

kubectl port-forward -n <first-name> service/<service-name> 8080:80

04 - Ingress

=> Host + Service Name

kubectl apply -n <first-name> -f Exercises/04-Ingress/ingress.yml 

kubectl apply -n <first-name> -f Exercises/04-Ingress/ingress-tls.yml 

05 - Persistence

kubectl apply -n <first-name> -f Exercises/05-Persistence/postgres-pvc.yml

kubectl apply -n <first-name> -f Exercises/05-Persistence/postgres.yml 

# Postgres

kubectl port-forward -n <first-name> service/postgres 5432:5432

kubectl exec -ti -n <namespace> <postgres-pod> -- /bin/bash
psql -U postgres
exit

kubectl exec -n <first-name> <postgres-pod> -- pg_dump -U postgres

06 - Config

kubectl apply -n <first-name> -f Exercises/06-Config/postgres-secret.yml

kubectl apply -n <first-name> -f Exercises/06-Config/postgres.yml

07 - Jobs

kubectl apply -n <first-name> -f Exercises/07-Jobs/postgres-secret.yml

kubectl describe -n tobias <job-name>

kubectl get pods -n tobias

kubectl logs -f -n tobias <job-pod-name>