Kubernetes Demo Application

This is a simple application for demonstration main features of Kubernetes and related technologies (EFK, Prometheus/Grafana, etc). Also, it is a sandbox where I try different frameworks and tools. The application is pretty simple. It has two services - sender and receiver. Sender sends messages to RabbitMQ topic, receiver just reads the topic and saves messages to MongoDB.

How to build it locally

Requirements

• Apache Maven 3.6.2 and above
• Java 11 and above
• Docker
• Kubernetes
• Helm

Building docker images

• Set proper environment in case of Minikube (https://minikube.sigs.k8s.io/docs/commands/docker-env/)

  eval $(minikube docker-env)

• Building receiver service

  cd receiver-service
  ./mvnw clean verify jib:dockerBuild

• Building sender service

  cd sender-service
  ./mvnw clean verify jib:dockerBuild

Using Tekton pipeline

• Install Kubernetes somehow
• Install Tekton's resources to k8s cluster

  kubectl apply -f https://storage.googleapis.com/tekton-releases/pipeline/previous/v0.20.1/release.yaml

• Install Tekton's command line tool
• Execute build command that just builds two maven projects (nothing more)

  tkn task start build

Using Skaffold

• Install Skaffold
• Execute skaffold build or skaffold run

Running the application locally via Helm

• Go to etc/k8s/charts/
• Run a helm chart

  helm upgrade -i <name> app-with-console-logs/