VOL-2238 - support a single rw-core deployment

Change-Id: I9e043af09e2974f93c15fa257d9a87acfcd5cd57
diff --git a/voltha/templates/rw-core-only-one.yaml b/voltha/templates/rw-core-only-one.yaml
new file mode 100644
index 0000000..3dcb518
--- /dev/null
+++ b/voltha/templates/rw-core-only-one.yaml
@@ -0,0 +1,135 @@
+# Copyright 2019-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+{{- if .Values.therecanbeonlyone }}
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: voltha-api
+  serviceAccountName: {{ .Values.serviceaccount }}
+spec:
+  serviceAccountName: {{ .Values.serviceaccount }}
+  ports:
+    - name: grpc
+      port: 55555
+      targetPort: 50057
+  selector:
+    app: rw-core
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: voltha-rw-core
+  serviceAccountName: {{ .Values.serviceaccount }}
+spec:
+  serviceAccountName: {{ .Values.serviceaccount }}
+  clusterIP: None
+  ports:
+    - name: grpc
+      port: 50057
+      targetPort: 50057
+  selector:
+    app: rw-core
+---
+apiVersion: apps/v1beta1
+kind: Deployment
+metadata:
+  name: voltha-rw-core
+  serviceAccountName: {{ .Values.serviceaccount }}
+  {{- if or (hasKey .Values "extra_deployment_labels") (hasKey .Values "rw_core_deployment_labels") }}
+  labels:
+    {{- if hasKey .Values "extra_deployment_labels" }}
+    {{- range $key, $val := .Values.extra_deployment_labels }}
+    {{ $key }}: {{ $val | quote }}
+    {{- end }}
+    {{- end }}
+    {{- if hasKey .Values "rw_core_deployment_labels" }}
+    {{- range $key, $val := .Values.rw_core_deployment_labels }}
+    {{ $key }}: {{ $val | quote }}
+    {{- end }}
+    {{- end }}
+  {{- end }}
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: rw-core
+        app.kubernetes.io/name: "read-write-core"
+        app.kubernetes.io/version: {{ quote .Chart.AppVersion }}
+        app.kubernetes.io/component: "core"
+        app.kubernetes.io/part-of: "voltha"
+        app.kubernetes.io/managed-by: {{ quote .Release.Service }}
+        helm.sh/chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+        {{- if hasKey .Values "extra_pod_labels" }}
+        {{- range $key, $val := .Values.extra_pod_labels }}
+        {{ $key }}: {{ $val | quote }}
+        {{- end }}
+        {{- end }}
+        {{- if hasKey .Values "rw_core_pod_labels" }}
+        {{- range $key, $val := .Values.rw_core_pod_labels }}
+        {{ $key }}: {{ $val | quote }}
+        {{- end }}
+        {{- end }}
+      annotations:
+        cni: "calico"
+    spec:
+      serviceAccountName: {{ .Values.serviceaccount }}
+      containers:
+        - name: voltha
+          image: '{{ tpl .Values.images.rw_core.registry . }}{{ tpl .Values.images.rw_core.repository . }}:{{ tpl .Values.images.rw_core.tag . }}'
+          imagePullPolicy: {{ tpl .Values.images.rw_core.pullPolicy . }}
+          env:
+            - name: NAMESPACE
+              value: voltha
+            - name: POD_IP
+              valueFrom:
+                fieldRef:
+                  fieldPath: status.podIP
+          args:
+            - "/app/rw_core"
+            - "-kv_store_type=etcd"
+            - "-kv_store_host={{ .Values.services.etcd.service }}"
+            - "-kv_store_port={{ .Values.services.etcd.port }}"
+            - "-grpc_host=0.0.0.0"
+            - "-grpc_port=50057"
+            - "-banner=true"
+            - "-kafka_adapter_host={{ .Values.services.kafka.adapter.service }}"
+            - "-kafka_adapter_port={{ .Values.services.kafka.adapter.port }}"
+            - "-kafka_cluster_host={{ .Values.services.kafka.cluster.port }}"
+            - "-kafka_cluster_port={{ .Values.services.kafka.cluster.port }}"
+            - "-rw_core_topic=rwcore"
+            - "-core_pair_topic=core-pair-1"
+            - "-kv_store_data_prefix=service/voltha"
+            - "-in_competing_mode=false"
+            - "-core_timeout=9999"
+            - "-timeout_long_request=9999"
+            - "-timeout_request=9999"
+            - "-probe_port=8080"
+          ports:
+            - containerPort: 50057
+              name: grpc
+          livenessProbe:
+            httpGet:
+              path: /healthz
+              port: 8080
+            initialDelaySeconds: 3
+            periodSeconds: 3
+          readinessProbe:
+            httpGet:
+              path: /readz
+              port: 8080
+            initialDelaySeconds: 3
+            periodSeconds: 3
+{{- end }}