Kubernetes Microservices

Using Minikube

Feature : Deployment

Deployment handles Replica,

Replica handles Pods

Get Started

Start Minikube minikube start

Check IP Address minikube ip

To run all yml files kubectl apply -f .

To check status kubectl get all

Delete

To Delete pods kubectl delete po --all

** To delete every resources in a file **
kubectl delete -f file.yml

Shorthands

pod = po kubectl describe po name

service = svc kubectl describe svc name

replicaSet = rs kubectl describe rs name

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Emergency Rollback

To check history kubectl rollout history deploy webapp

To check status kubectl rollout status deploy webapp

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NOTES :

Services

** Example **

Types:

• NodePort

For Exposing it externally (like browser)

apiVersion: v1
kind: Service
metadata:
    name: fleetman-position-tracker
spec:
    selector:
        app: position-tracker
    ports:
    - name: http
      port: 8080 # Container PORT
      nodePort: 30020 # External PORT
    type: NodePort

• ClusterIP

For internal Use only, and you cannot specify a nodePort

apiVersion: v1
kind: Service
metadata:
    name: fleetman-position-tracker
spec:
    selector:
        app: position-tracker
    ports:
    - name: http
      port: 8080 # Container PORT
    type: ClusterIP

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Troubleshooting

Here are some of the troubles that I have experienced during development/deployment

If minikube is not starting

minikube delete
minikube start

If the problem persist, try uninstalling and re-installing

brew cask uninstall minikube
brew cask install minikube