k8s-3tier-webapp

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k8s-3tier-webapp

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Sample web application based on k8s

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# 🦌 k8s-3tier-webapp

Sample web application based on k8s. Focus on connecting components, setting k8s resources, and aiming to microservices. The k8s-3tier-webapp service is for PoC, not production ready.

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[![Support JVM Version](https://img.shields.io/badge/JVM-17-yellow.svg?style=flat\&logo=Java)](https://github.com/yurake/k8s-3tier-webapp/actions?query=workflow%3A%22Java+CI%22) [![Support Quarkus Version](https://img.shields.io/badge/Quarkus-3.37.1-yellow.svg?style=flat\&logo=Quarkus)](https://github.com/yurake/k8s-3tier-webapp/actions?query=workflow%3A%22Java+CI%22) [![Support Kubernetes Version](https://img.shields.io/badge/Kubernetes-1.38.1-yellow.svg?style=flat\&logo=Kubernetes)](https://github.com/yurake/k8s-3tier-webapp/actions?query=workflow%3A%22Minikube+CI%22) [![Support Minikube Version](https://img.shields.io/badge/Minikube-1.38.1-yellow.svg?style=flat\&logo=Kubernetes)](https://github.com/yurake/k8s-3tier-webapp/actions?query=workflow%3A%22Minikube+CI%22) [![Support kind Version](https://img.shields.io/badge/kind-2.7.1-yellow.svg?style=flat\&logo=Kubernetes)](https://github.com/yurake/k8s-3tier-webapp/actions?query=workflow%3A%22kind+CI%22)

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[![sonarcloud](https://img.shields.io/badge/sonarcloud-enabled-orange?style=flat\&logo=sonarcloud)](https://sonarcloud.io/projects) More details at [sonarcloud](https://raw.githubusercontent.com/yurake/k8s-3tier-webapp/master/SONARCLOUD.md)

***

![LayardArchitecturalOverview.png](https://raw.githubusercontent.com/yurake/k8s-3tier-webapp/master/.gitbook/assets/LayardArchitecturalOverview.png)

## Concepts

* Choice better architecture what you expect based on k8s
* Help understanding k8s resources based on yaml
* Test automation on Github Actions for free
* Expand test automation - unit, end-to-end, performance, recovery, security
* Keep observability for monitoring services
* Improve application quality using public CI services that following Github

## Features

* All docker components run on k8s
* All application written by Java mostly Quarkus
* k8s resources written by yaml, try not to use helm, operator
* Use only public software, not commercial
* Use Github Actions for build, test, release

## Requirements

Installed CLI commands.

* :computer: docker
* :computer: kubectl
* :computer: minikube

## Run on Minikube

### Mac

```bash
minikube config set memory 121288
minikube config set cpus 6
minikube config set disk-size 80g
minikube start
minikube addons enable ingress
kubectl delete -A ValidatingWebhookConfiguration ingress-nginx-admission

eval $(minikube docker-env)
```

### Windows

minikube docker-env --shell powershell | Invoke-Expression
```

## Build & Apply

`apply.sh` supports `kubectl apply` to k8s clusters.

```bash
./kubernetes/bin/apply.sh
```

## Web Console Access

### Add hosts

Add IP, domain in /etc/hosts

```bash
echo `minikube ip` k8s.3tier.webapp api.server.minikube \
rabbitmq.management.minikube jenkins.minikube alertmanager.minikube prometheus.minikube \
grafana.minikube jupyter.minikube hazelcast.manager.minikube activemq.management.minikube \
jaeger.minikube argo.minikube >> /etc/hosts
```

### Web Console list

| Service                     | URL                                                                        |
| --------------------------- | -------------------------------------------------------------------------- |
| Top Page                    | [http://k8s.3tier.webapp/](http://k8s.3tier.webapp/)                       |
| Rabbitmq Management Console | [http://rabbitmq.management.minikube](http://rabbitmq.management.minikube) |
| Activemq Management Console | [http://activemq.management.minikube](http://activemq.management.minikube) |

![top.png](https://raw.githubusercontent.com/yurake/k8s-3tier-webapp/master/.gitbook/assets/top.png)

## Component

### Application

Java based web application for [application](application/)

### Kubernetes

Yaml based kubernetes manifests for [kubernetes](kubernetes/)

### Monitoring

Set up [monitoring](kubernetes/monitoring/) for Tier 3

## License

k8s-3tier-webapp is licensed under the MIT License. See [LICENSE](LICENSE/) for the full license text.

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## Contribution

1. [Fork](https://github.com/yurake/k8s-3tier-webapp/fork) this repo
2. Create a feature branch named like feature/enhancement from [master](https://github.com/yurake/k8s-3tier-webapp/tree/master) branch
3. Commit your changes
4. Rebase your local changes against the [master](https://github.com/yurake/k8s-3tier-webapp/tree/master) branch
5. Create new Pull Request

## Security

[Security](SECURITY.md)

k8s-3tier-webapp

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