[Tour Of Beam] Playground Router GRPC API host (apache#24542)

* aio * fix * README * adjust * -redis * reset values * -redis
rshamunov · Dec 8, 2022 · a40e79b · a40e79b
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diff --git a/learning/tour-of-beam/backend/README.md b/learning/tour-of-beam/backend/README.md
@@ -87,10 +87,24 @@ Prerequisites:
     * Cloud Functions API
     * Firebase Admin API
     * Secret Manager API
+ - existing setup of Playground backend in a project
+   * (output) GKE_CLUSTER_NAME (`playground` by default)
+   * (output) GKE_ZONE, like `us-east1-b`
  - set environment variables:
    * PROJECT_ID: GCP id
    * REGION: the region, "us-central1" fe
- - existing setup of Playground backend in a project
+   * PLAYGROUND_ROUTER_HOST: router serving Playground Router GRPC API
+
+__To discover Router host:__
+```
+# setup kubectl credentials
+gcloud container clusters get-credentials $GKE_CLUSTER_NAME --zone $GKE_ZONE --project $PROJECT_ID
+
+# get external host:port of a backend-router-grpc service
+PLAYGROUND_ROUTER_HOST=$(kubectl get svc -l "app=backend-router-grpc" \
+    -o jsonpath='{.items[0].status.loadBalancer.ingress[0].ip}:{.items[0].spec.ports[0].port}'\
+)
+```
 
 1. Deploy Datastore indexes (but don't delete existing Playground indexes!)
 ```
@@ -103,7 +117,7 @@ for endpoint in getSdkList getContentTree getUnitContent getUserProgress postUni
 gcloud functions deploy $endpoint --entry-point $endpoint \
   --region $REGION --runtime go116 --allow-unauthenticated \
   --trigger-http \
-  --set-env-vars="DATASTORE_PROJECT_ID=$PROJECT_ID,GOOGLE_PROJECT_ID=$PROJECT_ID"
+  --set-env-vars="DATASTORE_PROJECT_ID=$PROJECT_ID,GOOGLE_PROJECT_ID=$PROJECT_ID,PLAYGROUND_ROUTER_HOST=$PLAYGROUND_ROUTER_HOST"
 done
 
 ```

diff --git a/playground/infrastructure/helm-playground/templates/deployment-router-grpc.yml b/playground/infrastructure/helm-playground/templates/deployment-router-grpc.yml
@@ -0,0 +1,48 @@
+
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: playground-router-grpc
+  labels:
+    app: backend-router-grpc
+    type: backend
+spec:
+  template:
+    metadata:
+     name: playground
+     labels:
+       app: backend-router-grpc
+       type: backend
+    spec:
+     containers:
+     - name: playground-backend-router-grpc
+       image: "{{ .Values.registry}}/{{ .Values.image.router_image }}:{{ .Values.tag }}"
+       imagePullPolicy: {{ .Values.image.pullPolicy }}
+       env:
+         - name: GOOGLE_CLOUD_PROJECT
+           value: {{ .Values.project_id }}
+         - name: CACHE_TYPE
+           value: "remote"
+         - name: CACHE_ADDRESS
+           value: {{ .Values.redis_ip }}
+         - name: PROTOCOL_TYPE
+           value: TCP
+  replicas: {{ .Values.replicaCount  }}
+  selector:
+    matchLabels:
+     app: backend-router-grpc
diff --git a/playground/infrastructure/helm-playground/templates/service-router-grpc.yml b/playground/infrastructure/helm-playground/templates/service-router-grpc.yml
@@ -0,0 +1,31 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: backend-router-grpc
+    type: backend
+  name: playground-router-grpc-service
+spec:
+  type: LoadBalancer
+  selector:
+    app: backend-router-grpc
+  ports:
+  - name: grpc
+    port: 8080
+    protocol: TCP
+    targetPort: 8080