helm chart with service provision/binding

Chart.yaml

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+apiVersion: v1
+appVersion: "1.0"
+description: Ruby application that consumes Service Catalog bindings
+name: ruby-with-binding
+version: 0.1.0

README.md

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+# Spring Music for Kubernetes Service Catalog
+
+To deploy the sample Ruby/Sinatra application with a service instance/binding from your Service Catalog:
+
+```shell
+helm upgrade --install show-me-secrets . \
+    --set "database.service.class=cleardb,database.service.plan=spark"
+```
+
+In the example above, it is assumed that your Service Catalog has a service class "cleardb" with a service plan "spark".
+
+To run Spring Music without a database service instnace/binding:
+
+```shell
+helm upgrade --install show-me-secrets . \
+    --set "database.service.class=null"
+```
+
+## Clean up
+
+To remove the sample application:
+
+```shell
+helm delete --purge show-me-secrets
+```

templates/NOTES.txt

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+1. Get the application URL by running these commands:
+{{- if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "ruby-with-binding.fullname" . }})
+  export NODE_IP=$(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 "ruby-with-binding.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "ruby-with-binding.fullname" . }} -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
+  echo http://$SERVICE_IP:{{ .Values.service.port }}
+{{- else if contains "ClusterIP" .Values.service.type }}
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "ruby-with-binding.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  echo "Visit http://127.0.0.1:{{ .Values.service.port }} to use your application"
+  kubectl port-forward $POD_NAME {{ .Values.service.port }}:8080
+{{- end }}

templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "ruby-with-binding.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 "ruby-with-binding.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 "ruby-with-binding.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}

templates/database-binding.yaml

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+{{- if .Values.database.service.class -}}
+# svcat bind app-db --name db-binding --secret-name db-secret
+apiVersion: servicecatalog.k8s.io/v1beta1
+kind: ServiceBinding
+metadata:
+  name: {{ include "ruby-with-binding.fullname" . }}-db-binding
+spec:
+  instanceRef:
+    name: {{ include "ruby-with-binding.fullname" . }}-db-instance
+  secretName: {{ template "ruby-with-binding.fullname" . }}-db-secret
+{{- end -}}

templates/database-instance.yaml

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+{{- if .Values.database.service.class -}}
+# svcat provision app-db --class cleardb --plan spark
+apiVersion: servicecatalog.k8s.io/v1beta1
+kind: ServiceInstance
+metadata:
+  name: {{ include "ruby-with-binding.fullname" . }}-db-instance
+spec:
+  clusterServiceClassExternalName: {{ .Values.database.service.class }}
+  clusterServicePlanExternalName: {{ .Values.database.service.plan }}
+{{- end -}}

templates/deployment.yaml

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+apiVersion: apps/v1beta2
+kind: Deployment
+metadata:
+  name: {{ include "ruby-with-binding.fullname" . }}
+  labels:
+    app.kubernetes.io/name: {{ include "ruby-with-binding.name" . }}
+    helm.sh/chart: {{ include "ruby-with-binding.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: {{ include "ruby-with-binding.name" . }}
+      app.kubernetes.io/instance: {{ .Release.Name }}
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: {{ include "ruby-with-binding.name" . }}
+        app.kubernetes.io/instance: {{ .Release.Name }}
+    spec:
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: 8080
+              protocol: TCP
+          {{- if .Values.database.service.class }}
+          env:
+          - name: DATABASE_URL
+            valueFrom:
+              secretKeyRef:
+                name: {{ template "ruby-with-binding.fullname" . }}-db-secret
+                key: uri
+          - name: DATABASE_JDBC_URL
+            valueFrom:
+              secretKeyRef:
+                name: {{ template "ruby-with-binding.fullname" . }}-db-secret
+                key: jdbcUrl
+          - name: DATABASE_USERNAME
+            valueFrom:
+              secretKeyRef:
+                name: {{ template "ruby-with-binding.fullname" . }}-db-secret
+                key: username
+          - name: DATABASE_PASSWORD
+            valueFrom:
+              secretKeyRef:
+                name: {{ template "ruby-with-binding.fullname" . }}-db-secret
+                key: password
+          {{- end }}
+          livenessProbe:
+            httpGet:
+              path: /
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /
+              port: http
+      {{- if .Values.database.service.class }}
+      volumes:
+        - name: db-credentials
+          secret:
+            secretName: {{ template "ruby-with-binding.fullname" . }}-db-secret
+      {{- end }}

templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "ruby-with-binding.fullname" . }}
+  labels:
+    app.kubernetes.io/name: {{ include "ruby-with-binding.name" . }}
+    helm.sh/chart: {{ include "ruby-with-binding.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    app.kubernetes.io/name: {{ include "ruby-with-binding.name" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}

values.yaml

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+# Default values for ruby-with-binding.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+replicaCount: 1
+
+database:
+  service:
+    class: cleardb
+    plan: spark
+
+image:
+  repository: drnic/show-me-secrets-ruby
+  tag: latest
+  pullPolicy: Always
+
+nameOverride: ""
+fullnameOverride: ""
+
+service:
+  type: ClusterIP
+  port: 3000
+