K8 Quick Guide for MacOS and VirtualBox

Commands

 

# Commands What it does
1 sysctl -a | grep machdep.cpu.features | grep VMX Minikube requires that VT-x/AMD-v virtualization is enabled in BIOS. To check that this is enabled on OSX / macOS ru
2 brew update && brew install kubectl && brew cask install docker minikube virtualbox use brew to install kubectl, docker, minikube and virtualbox
3 docker –version

docker-compose –version

docker-machine –version

minikube version

kubectl version –client

verify the installation
4 minikube start start minikube

a local kubernetes cluster with one node

5 kubectl get nodes should show only one node
6 eval $(minikube docker-env) Use minikube’s built-in docker daemon:
7 docker ps
8 docker run -d -p 5000:5000 –restart=always –name registry registry:2 First setup a local registry, so Kubernetes can pull the image(s) from there.
9 docker build . –tag my-app build the Dockerfile below locally if you want to follow this guide to the letter. Store the Dockerfile locally, preferably in an empty directory and run:
10 docker tag my-app localhost:5000/my-app:0.1.0 You should now have an image named ‘my-app’ locally, check by using docker images (or your own image of course). You can then publish it to your local docker registry:
11 docker images
12 kubectl create -f my-app.yml deployment “my-app” created

service “my-app” created

13 kubectl get all show the pod and service
14 minikube service my-app –url The configuration exposes my-app outside of the cluster, you can get the address to access it by running
15 minikube dashboard start gui dashboard

URL is something like http://192.168.99.100:30000/

minikube ssh ssh to minikube
16 kubectl delete deploy my-app

kubectl delete service my-app

Delete deployment of my-app
17 minikube stop;

minikube delete;

rm -rf ~/.minikube .kube;

brew uninstall kubectl;

brew cask uninstall docker virtualbox minikube;

clean up everything

mysql-wordpress

 

# Commands What it does
1 kubectl version check version
2 kubectl create secret generic mysql-pass –from-literal=password=michelle create secret

use ‘michelle’ as password

3 kubectl get secrets verify secret
4 kubectl create -f mysql-deployment.yaml Deploy MySQL from the mysql-deployment.yaml file

The MYSQL_ROOT_PASSWORD environment variable sets the database password from the Secret

5 kubectl get pvc Verify that a PersistentVolume got dynamically provisioned
6 kubectl create -f wordpress-deployment.yaml Create a WordPress Service and Deployment from the wordpress-deployment.yaml file
7 kubectl get pvc kubectl get pvc
8 kubectl get services wordpress Verify that the Service is running by running the command
9 minikube service wordpress –url
10 kubectl delete secret mysql-pass

kubectl delete deployment -l app=wordpress

kubectl delete service -l app=wordpress

kubectl delete pvc -l app=wordpress

delete secret

delete all deployments and services

delete the PersistentVolumeClaims. The dynamically provisioned PersistentVolumes will be automatically deleted.

expose mysql to local
11 kubectl get pods retrieve the name of mysql pod
12 kubectl port-forward wordpress-mysql-86987f6b9-9zvbx 3306:3306 port forwarding

https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#port-forward/

13 connect to it use mysql workbench to connect via localhost:3306

References

  1. https://gist.github.com/kevin-smets/b91a34cea662d0c523968472a81788f7
  2. https://kubernetes.io/docs/tutorials/stateful-application/mysql-wordpress-persistent-volume/#objectives
  3. Kubectl https://kubernetes.io/docs/tasks/tools/install-kubectl/#configure-kubectl
  4. Minikube https://kubernetes.io/docs/tutorials/stateless-application/hello-minikube/
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