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Getting Started with MSA (Micro Service Architecture)

Getting started with MSA (Micro Service Architecture) using Docker, Kubernetes and Helm Charts.

  1. Used minikube to setup Kubernetes cluster.
  2. Setup script for Ubuntu (18.0.4 LTS) on AWS that installs all dependencies (Docker, Kubernetes, Minikube).

Start minikube - Minikube runs a single-node Kubernetes cluster inside the instance.

minikube start --vm-driver=none

If there was a previous deployment on the instance, it might be necessary to override the previous configuration

sudo mv /root/.kube $HOME/.kube
sudo mv /root/.minikube $HOME/.minikube

If neccessary change user and group ownership.

sudo chown -R $USER $HOME/.kube
sudo chgrp -R $USER $HOME/.kube
sudo chown -R $USER $HOME/.minikube
sudo chgrp -R $USER $HOME/.minikube

Check status of the minikube

minikube status

Deploy the service - a Hello world app using the tutum/hello-world image

kubectl create -f deployment.yaml

Get IP to reach the service

minikube ip

Display information about the Deployment:

kubectl get deployments msadeployment
kubectl describe deployments msadeployment

Display information about the Service

kubectl get services msaservice

Display detailed information about the Service

kubectl describe services msaservice

Use the minikube ip to access the Hello World application

curl http://<minikube ip>:<nodeport>

To access the app outside the ec2 Instance (pulic web access)

http://<ec2-instance-public-ip>:<nodeport>

image

To Clean up first delete the Service then delete the Deployment, the ReplicaSet, and the Pods that are running the app

kubectl delete deployment msadeployment
kubectl delete services msaservice

Kubernetes Command Reference

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