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push helm chart via github action
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‎.github/workflows/build_and_push_chart.yaml‎

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name: Build and Push Training Application Helm Chart
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on:
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push:
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branches:
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- "main"
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paths:
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- helm-chart/**
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- makefile
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jobs:
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build:
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runs-on: ubuntu-latest
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steps:
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- name: Checkout
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uses: actions/checkout@v4
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- name: Set up Docker Buildx
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uses: docker/setup-buildx-action@v3
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- name: Login to Quay
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uses: docker/login-action@v3
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with:
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registry: quay.io
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username: ${{ secrets.QUAY_USERNAME }}
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password: ${{ secrets.QUAY_ROBOT_TOKEN }}
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- name: Install Helm
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uses: azure/setup-helm@v4.3.0
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- name: Push Helm Chart
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run: make helm-push

.github/workflows/build_and_push.yaml renamed to .github/workflows/build_and_push_images.yaml

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name: Build and Push Training Application
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name: Build and Push Training Application Images
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on:
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push:
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branches:
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- "main"
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paths:
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- src/**
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- docker/**
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- training-application.conf
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- makefile
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jobs:
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build:

‎.gitignore‎

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.DS_Store
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application.log
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/data/
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*.tgz

‎Makefile‎

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BUILD_VERSION_A = ${BUILD_VERSION}-A
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BUILD_VERSION_B = ${BUILD_VERSION}-B
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BUILD_VERSION_DISTROLESS = ${BUILD_VERSION}-distroless
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HELM_CHART_VERSION = 1.0.1
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.PHONY: update-dependencies
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update-dependencies:
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docker buildx build --push --platform linux/arm64,linux/amd64 -f docker/Dockerfile-A --tag ${IMAGE_REPOSITORY}/${APPLICATION_NAME}:${BUILD_VERSION_A} .
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docker buildx build --push --platform linux/arm64,linux/amd64 -f docker/Dockerfile-B --tag ${IMAGE_REPOSITORY}/${APPLICATION_NAME}:${BUILD_VERSION_B} .
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docker buildx build --push --platform linux/arm64,linux/amd64 -f docker/Dockerfile-distroless --tag ${IMAGE_REPOSITORY}/${APPLICATION_NAME}:${BUILD_VERSION_DISTROLESS} .
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.PHONY: helm-push
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helm-push:
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helm package ./helm-chart --version ${HELM_CHART_VERSION}
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helm push --debug training-application-${HELM_CHART_VERSION}.tgz oci://quay.io/kubermatic-labs/helm-charts/

‎README.md‎

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**Nothing**, besides possibly (depending on the application configuration) showing a cute cat image 🙀.
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<img width="500" alt="Screenshot 2025-06-04 at 15 40 30" src="https://github.com/user-attachments/assets/7cafc452-4f21-4202-8379-2a983ecbf122" />
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## Available Endpoints
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> **_NOTE:_** The application offers the following endpoints on port **8080**
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- **Default Value**: false
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- **Usage**: via config file
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### `persistMetaInfo`
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- **Description**: Writes metainfo into the file `./data/metainfo.txt`. The metainfo has to be provided via the environment variables named `WORKER_NODE_NAME`, `POD_NAME` and `POD_IP`.
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- **Type**: bool
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- **Default Value**: false
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- **Usage**: via config file
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### `catMode`
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- **Description**: Flag to get cute cat images in the root endpoint

‎helm-chart/Chart.yaml‎

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apiVersion: v2
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name: my-app
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version: 1.0.0
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name: training-application
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version: 0.0.0

‎helm-chart/README.md‎

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The chart is currently used in the following trainings. Ensure you do not introduce any breaking changes to it.
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# Training Application Helm Chart
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- in K1 (did not work, due to k1 needs index.yaml and packaged helm chart in repoURL)
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- in KKP
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## Prerequisites for the value `persistMetaInfo`
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- The StorageClass with the name `my-storageclass` has to exist in the cluster
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## Prerequisites for the value `ingress.enabled`
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- The IngressClass with the name `nginx` has to exist in the cluster
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- CertManager has to exist in the cluster
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- The ClusterIssuer with the name `letsencrypt-issuer` has to exist in the cluster

‎helm-chart/templates/deployment.yaml‎

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ports:
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- name: http
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containerPort: 8080
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env:
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- name: WORKER_NODE_NAME
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valueFrom:
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fieldRef:
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fieldPath: spec.nodeName
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- name: POD_NAME
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valueFrom:
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fieldRef:
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fieldPath: metadata.name
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- name: POD_IP
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valueFrom:
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fieldRef:
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fieldPath: status.podIP
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livenessProbe:
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httpGet:
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path: /liveness/
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- name: my-volume
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mountPath: /app/training-application.conf
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subPath: training-application.conf
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{{- if .Values.persistMetaInfo }}
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- name: persistence
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mountPath: /app/data/
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{{- end }}
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volumes:
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- name: my-volume
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configMap:
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name: my-app
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{{- if .Values.persistMetaInfo }}
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- name: persistence
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persistentVolumeClaim:
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claimName: training-application-pvc
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{{- end }}

‎helm-chart/templates/pvc.yaml‎

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{{- if .Values.persistMetaInfo }}
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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name: training-application-pvc
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spec:
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storageClassName: my-storageclass
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accessModes:
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- ReadWriteOnce
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resources:
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requests:
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storage: 100Mi
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{{- end }}

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