support database.service.class=null for in-memory/no service instance

README.md

@@ -0,0 +1,17 @@
+# Spring Music for Kubernetes Service Catalog
+
+To deploy Spring Music, with a service instance/binding from your Service Catalog:
+
+```shell
+helm upgrade --install spring-music . \
+    --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 spring-music . \
+    --set "database.service.class=null"
+```

templates/database-binding.yaml

@@ -1,4 +1,4 @@
----
+{{- if .Values.database.service.class -}}
 # svcat bind app-db --name db-binding --secret-name db-secret
 apiVersion: servicecatalog.k8s.io/v1beta1
 kind: ServiceBinding
@@ -8,3 +8,4 @@ spec:
   instanceRef:
     name: {{ include "app-with-binding.fullname" . }}-db-instance
   secretName: {{ template "app-with-binding.fullname" . }}-db-secret
+{{- end -}}

templates/database-instance.yaml

@@ -1,4 +1,4 @@
----
+{{- if .Values.database.service.class -}}
 # svcat provision app-db --class cleardb --plan spark
 apiVersion: servicecatalog.k8s.io/v1beta1
 kind: ServiceInstance
@@ -7,3 +7,4 @@ metadata:
 spec:
   clusterServiceClassExternalName: {{ .Values.database.service.class }}
   clusterServicePlanExternalName: {{ .Values.database.service.plan }}
+{{- end -}}

templates/deployment.yaml

@@ -28,6 +28,7 @@ spec:
             - name: http
               containerPort: 8080
               protocol: TCP
+          {{- if .Values.database.service.class }}
           env:
           - name: DATABASE_URL
             valueFrom:
@@ -49,6 +50,7 @@ spec:
               secretKeyRef:
                 name: {{ template "app-with-binding.fullname" . }}-db-secret
                 key: password
+          {{- end }}
           livenessProbe:
             httpGet:
               path: /
@@ -57,7 +59,9 @@ spec:
             httpGet:
               path: /
               port: http
+      {{- if .Values.database.service.class }}
       volumes:
         - name: db-credentials
           secret:
             secretName: {{ template "app-with-binding.fullname" . }}-db-secret
+      {{- end }}