service objects

Question 1

a ______ is used to set up networking in our kube cluster. Making it easily accessible externally

websites. gui. people outside need to access webserver.
publicly.

Answer 1

SERVICE OBJECT

Question 2

4 types of services

Answer 2

CLUSTERIP
NODEPORT
LOADBALANCER
INGRESS

Question 3

which ONE of the 4 services SHOULD ONLY BE USED FOR DEV ENVIRONMENTS?
is NOT GOOD FOR PRODUCTION ENVIORNMENTS

Answer 3

NODEPORT

Question 4

apiVersion: v1
kind: Service
metadata:
  name: svc-nodeport-httpd
spec:
  type: NodePort
  ports:
  - port: 3050 

WHAT IS -port: 3050

Answer 4

Used by other pods so they can access the assets in container. from another pod, you can connect to this specific pod on PORT 3050

Question 5

apiVersion: v1
kind: Service
metadata:
  name: svc-nodeport-httpd
spec:
  type: NodePort
  ports:
  - port: 3050
    targetPort: 80 

WHAT IS -targetPort: 80

Answer 5

port number the pods primary container is listening on. Needs to mirror containerport setting as defined in the object config file (yaml file that created the pod)

Question 6

apiVersion: v1
kind: Service
metadata:
  name: svc-nodeport-httpd
spec:
  type: NodePort
  ports:
  - port: 3050
    targetPort: 80
    nodePort: 31000 

WHAT IS nodePort 30000-32767

Answer 6

nodePort will always range between 30000-32767

• kube-proxy component listens on this port for the worker node.
• to access container from webbrowser youd need to use this port.
• ^^^ the drawback to using nodeport service type

Question 7

apiVersion: v1
kind: Service
metadata:
  name: svc-nodeport-httpd
spec:
  type: NodePort
  ports:
  - port: 3050
    targetPort: 80
    nodePort: 31000
  selector:
    app: apache_webserver

Answer 7

it will forward traffic to object that has

‘app: apache_webserver’ as a metadata in yml file.

Question 8

COMMAND to CREATE a SERVICE OBJECT with :

svc-nodeport.yml

Answer 8

kubectl apply -f configs/svc-nordeport.yml

Question 9

VIEW ALL OBJECTS COMMAND

Answer 9

kubectl get all -o wide

Question 10

if the minikube ip is 192.168.99.107 and the nodeport is 31000.

how would you run the CURL COMMAND on to TEST THE ENDPOINT

Answer 10

curl http://192.168.99.100:31000

Question 11

another way to run curl command to TEST THE ENDPOINT
is to run:
$ minikube service svc-nodeport-httpd –url

to show the IP and then…

Answer 11

curl $(minikube service svc-nodeport-httpd –url)

Question 12

DELETE ALL OBJECTS

Answer 12

kubectl delete all -all

Question 13

DELETE WITH GRACEPERIOD

Answer 13

kubectl delete -f ./configs –grace-period=2