https://youtu.be/qt76R2G4h-0

Fork the following repository: https://github.com/vfarcic/k8s-specs

git clone <https://github.com/vfarcic/k8s-specs.git>

cd k8s-specs

Create a mongo DB database

kubectl run db --image mongo \\
--generator "run-pod/v1"

If you want to confirm that the pod was created do: kubectl get pods

Note that if you do not see any output right away that is ok; the mongo image is really big so it might take a while to get the pod up and running.

Confirm that the image is running in the cluster

docker container ls -f ancestor=mongo

To delete the pod run

kubectl delete pod db

Delete the pod above since it was not the best way to run the pod.

• Pods should be created in a declarative format. However, in this case, we created it in an imperative way — BAD!

To look at the pod definition:

cat pod/db.yml

apiVersion: v1 // means the version 1 of the Kubernetes pod API; API version and kind has to be provided -- it is mandatory
kind: Pod
metadata: // the metadata provides information on the pod, it does not specifiy how the pod behaves
name: db
labels:
type: db
vendor: MongoLabs // I assume, who has created the image
spec:
containers:
- name: db
image: mongo:3.3 // image name and tag
command: ["mongod"]
args: ["--rest", "--httpinterface"] // arguments, defined in an array