minikube adventure: deployments 2 ways

Doin a deployment directly on  command  line...
then  a  deployment  using a  yaml.

https://kubernetes.io/docs/setup/learning-environment/minikube/
(and also  https://www.bmc.com/blogs/kubernetes-services/)


make deployment

kubectl create deployment hello-minikube --image=k8s.gcr.io/echoserver:1.10

➜  ~ kubectl get services
NAME         TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
kubernetes   ClusterIP   10.96.0.1    <none>        443/TCP   83d 

➜  ~ kubectl  get deployments
NAME             READY   UP-TO-DATE   AVAILABLE   AGE
hello-minikube   1/1     1            1           7m1s 

➜  ~ kubectl  get pods       
NAME                              READY   STATUS    RESTARTS   AGE
hello-minikube-797f975945-44hlh   1/1     Running   0          7m10s

expose as service
4 types of services:  

1. ClustereIP:  exposes the service on a cluster-internal IP.  You can reach the service only from within the cluster.
2. NodePort:  exposes the service on each node’s IP at a static port. A ClusterIP service is created automatically, and the NodePort service will route to it. 
3. LoadBalancer:  exposes the service externally using the load balancer of your cloud provider. The external load balancer routes to your NodePort and ClusterIP services, which are created automatically.
4. ExternalName:  maps the service to the contents of the externalName field. It does this by returning a value for the CNAME record.

kubectl expose deployment hello-minikube --type=NodePort --port=8080

alternatively coulda done something  like:

kubectl expose deployment hello-world --type=ClusterIP --name=example-serviceservice "example-service" exposed

kubectl port-forward service/example-service 8080:8080 

minikube service hello-minikube --url

great. then i deleted that  service+deployment.
then  make a  yaml:

cat hello_minikube.yamlapiVersion: apps/v1kind: Deploymentmetadata:  name: hello-minikube-deployment  labels:    app: hello-minikubespec:  replicas: 1  selector:    matchLabels:      app: hello-minikube  template:    metadata:      labels:        app: hello-minikube    spec:      containers:      - name: hello-minikube        image: k8s.gcr.io/echoserver:1.10        ports:        - containerPort: 80

then  apply yaml:

kubectl apply  -f hello_minikube.yaml 

deployment.apps/hello-minikube-deployment created