Helm chart draft

deployment/rails/.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
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj

deployment/rails/Chart.yaml

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+apiVersion: v1
+appVersion: "1.0"
+description: A Helm chart for Kubernetes
+name: rails
+version: 0.1.0

deployment/rails/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 }}://{{ . }}{{ $.Values.ingress.path }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "rails.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get svc -w {{ include "rails.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "rails.fullname" . }} -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
+  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={{ include "rails.name" . }},release={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl port-forward $POD_NAME 8080:80
+{{- end }}

deployment/rails/templates/_helpers.yml

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "rails.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 "rails.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 "rails.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{- define "rails_container_env" }}
+{{- $fullName := include "rails.fullname" . -}}
+{{- range $secretName, $secretValue := .Values.env_secrets }}
+- name: {{ $secretName | upper }}
+  valueFrom:
+    secretKeyRef:
+      name: {{ $fullName }}-env-secrets
+      key: {{ $secretName }}
+{{- end}}
+{{- range $envName, $envValue := .Values.env }}
+- name: {{ $envName | upper }}
+  valueFrom:
+    configMapKeyRef:
+      name: {{ $fullName }}-env-variables
+      key: {{ $envName }}
+{{- end }}
+{{- end }}

deployment/rails/templates/deployment.yaml

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+apiVersion: apps/v1beta2
+kind: Deployment
+metadata:
+  name: {{ include "rails.fullname" . }}
+  labels:
+    app: {{ include "rails.name" . }}
+    chart: {{ include "rails.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app: {{ include "rails.name" . }}
+      release: {{ .Release.Name }}
+  template:
+    metadata:
+      labels:
+        app: {{ include "rails.name" . }}
+        release: {{ .Release.Name }}
+    spec:
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          command: ["bundle"]
+          args: ["exec", "rails", "s", "-p", "80"]
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: 80
+              protocol: TCP
+          env:
+            {{- include "rails_container_env" . | indent 12}}
+          resources:
+{{ toYaml .Values.resources | indent 12 }}
+    {{- with .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.affinity }}
+      affinity:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.tolerations }}
+      tolerations:
+{{ toYaml . | indent 8 }}
+    {{- end }}

deployment/rails/templates/env_secrets.yml

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+{{- $fullName := include "rails.fullname" . -}}
+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ $fullName }}-env-secrets
+type: Opaque
+data:
+{{- range $secretName, $secretValue := .Values.env_secrets }}
+  {{ $secretName }}: {{ $secretValue | b64enc }}
+{{- end}}

deployment/rails/templates/env_variables.yml

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+{{- $fullName := include "rails.fullname" . -}}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ $fullName }}-env-variables
+data:
+{{ toYaml .Values.env | indent 2 }}

deployment/rails/templates/ingress.yaml

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+{{- if .Values.ingress.enabled -}}
+{{- $fullName := include "rails.fullname" . -}}
+{{- $ingressPath := .Values.ingress.path -}}
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  name: {{ $fullName }}
+  labels:
+    app: {{ include "rails.name" . }}
+    chart: {{ include "rails.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+{{- with .Values.ingress.annotations }}
+  annotations:
+{{ toYaml . | indent 4 }}
+{{- end }}
+spec:
+{{- if .Values.ingress.tls }}
+  tls:
+  {{- range .Values.ingress.tls }}
+    - hosts:
+      {{- range .hosts }}
+        - {{ . | quote }}
+      {{- end }}
+      secretName: {{ .secretName }}
+  {{- end }}
+{{- end }}
+  rules:
+  {{- range .Values.ingress.hosts }}
+    - host: {{ . | quote }}
+      http:
+        paths:
+          - path: {{ $ingressPath }}
+            backend:
+              serviceName: {{ $fullName }}
+              servicePort: http
+  {{- end }}
+{{- end }}

deployment/rails/templates/post-install-job.yml

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+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: "{{.Release.Name}}-post-install"
+  annotations:
+    "helm.sh/hook": post-install
+    "helm.sh/hook-delete-policy": hook-succeeded
+spec:
+  template:
+    spec:
+      restartPolicy: Never
+      containers:
+        - name: post-install-job
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          command: ["sh"]
+          args: ["-c", "bundle exec rake db:migrate 2>/dev/null || bundle exec rake db:setup"]
+          env:
+            {{- include "rails_container_env" . | indent 12}}

deployment/rails/templates/post-upgrade-job.yml

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+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: "{{.Release.Name}}-post-upgrade"
+  annotations:
+    "helm.sh/hook": post-upgrade
+    "helm.sh/hook-delete-policy": hook-succeeded
+spec:
+  template:
+    spec:
+      restartPolicy: Never
+      containers:
+        - name: post-upgrade-job
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          command: ["bundle", "exec", "rake", "db:migrate"]
+          env:
+            {{- include "rails_container_env" . | indent 12}}

deployment/rails/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "rails.fullname" . }}
+  labels:
+    app: {{ include "rails.name" . }}
+    chart: {{ include "rails.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    app: {{ include "rails.name" . }}
+    release: {{ .Release.Name }}

deployment/rails/values.yaml

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+# Default values for rails.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+replicaCount: 1
+
+image:
+  repository: eu.gcr.io/sandbox-206715/rails-example
+  tag: latest
+  pullPolicy: IfNotPresent
+
+nameOverride: ""
+fullnameOverride: ""
+
+service:
+  type: ClusterIP
+  port: 80
+  targetPort: 3000
+
+ingress:
+  enabled: false
+  annotations: {}
+    # kubernetes.io/ingress.class: nginx
+    # kubernetes.io/tls-acme: "true"
+  path: /
+  hosts:
+    - chart-example.local
+  tls: []
+  #  - secretName: chart-example-tls
+  #    hosts:
+  #      - chart-example.local
+
+resources: {}
+  # We usually recommend not to specify default resources and to leave this as a conscious
+  # choice for the user. This also increases chances charts run on environments with little
+  # resources, such as Minikube. If you do want to specify resources, uncomment the following
+  # lines, adjust them as necessary, and remove the curly braces after 'resources:'.
+  # limits:
+  #  cpu: 100m
+  #  memory: 128Mi
+  # requests:
+  #  cpu: 100m
+  #  memory: 128Mi
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}
+
+env_secrets:
+  db_password: 7pFEZORRHG
+
+env:
+  db_host: postgres-sandbox-postgresql