adding code sample for Google Cloud Memorystore

memorystore/redis/README.md

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+# Getting started with Googe Cloud Memorystore
+Simple HTTP server example to demonstrate connecting to Google Cloud Memorystore.
+This sample uses the [Jedis client](https://mvnrepository.com/artifact/redis.clients/jedis).
+Please see other client library options [here](https://redis.io/clients#java).
+
+## Running on GCE
+
+Follow the instructions in [this guide](TODO-UPDATE-LINK) to deploy the sample application on a GCE VM.
+
+## Running on GKE
+
+Follow the instructions in [this guide](TODO-UPDATE-LINK) to deploy the sample application on GKE.
+
+## Running on Google App Engine Flex
+
+Follow the instructions in [this guide](TODO-UPDATE-LINK) to deploy the sample application on GKE.
+

memorystore/redis/flex_deployment/app.yaml

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+#  Copyright 2018 Google Inc.
+#
+#  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.
+# [START app_yaml]
+runtime: java
+env: flex
+# [END app_yaml]

memorystore/redis/gce_deployment/deploy.sh

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+#!/bin/bash
+#
+#  Copyright 2018 Google Inc.
+#
+#  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.
+# [START deploy_sh]
+if [ -z "$GCS_APP_LOCATION" ]; then
+  if [ -z "$BUCKET"]; then
+    echo "Must set \$BUCKET. For example: BUCKET=my-bucket-name"
+    exit 1
+  fi
+  GCS_APP_LOCATION="gs://$BUCKET/gce/"
+  echo $GCS_APP_LOCATION
+fi
+
+if [ -z "$ZONE" ]; then
+  ZONE=$(gcloud config get-value compute/zone -q)
+  echo $ZONE
+fi
+
+if [ -z "$WAR" ]; then
+  WAR=visitcounter-1.0-SNAPSHOT.war
+fi
+
+#Build the WAR package
+cd ..
+mvn clean package
+
+#Copy the WAR artifact to the GCS bucket location
+gsutil cp -r target/${WAR} ${GCS_APP_LOCATION}
+
+cd gce_deployment
+
+# Create an instance
+gcloud compute instances create my-instance \
+    --image-family=debian-8 \
+    --image-project=debian-cloud \
+    --machine-type=g1-small \
+    --scopes cloud-platform \
+    --metadata-from-file startup-script=startup-script.sh \
+    --metadata app-location=${GCS_APP_LOCATION},app-war=$WAR \
+    --zone $ZONE \
+    --tags http-server
+
+gcloud compute firewall-rules create allow-http-server-8080 \
+    --allow tcp:8080 \
+    --source-ranges 0.0.0.0/0 \
+    --target-tags http-server \
+    --description "Allow port 8080 access to http-server"
+# [END deploy_sh]

memorystore/redis/gce_deployment/startup-script.sh

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+#! /bin/bash
+
+#  Copyright 2018 Google Inc.
+#
+#  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.
+# [START startup_script_sh]
+set -ex
+
+# Talk to the metadata server to get the project id and location of application binary.
+PROJECTID=$(curl -s "http://metadata.google.internal/computeMetadata/v1/project/project-id" -H "Metadata-Flavor: Google")
+GCS_APP_LOCATION=$(curl -s "http://metadata.google.internal/computeMetadata/v1/instance/attributes/app-location" -H "Metadata-Flavor: Google")
+WAR=$(curl -s "http://metadata.google.internal/computeMetadata/v1/instance/attributes/app-war" -H "Metadata-Flavor: Google")
+
+gsutil cp "$GCS_APP_LOCATION"** .
+
+# Install dependencies from apt
+apt-get update
+apt install -t jessie-backports -yq openjdk-8-jre-headless ca-certificates-java
+apt install -t jessie-backports -yq openjdk-8-jdk
+
+# Make Java8 the default
+update-alternatives --set java /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
+
+# Jetty Setup
+mkdir -p /opt/jetty/temp
+mkdir -p /var/log/jetty
+
+# Get Jetty
+curl -L https://repo1.maven.org/maven2/org/eclipse/jetty/jetty-distribution/9.4.4.v20170414/jetty-distribution-9.4.4.v20170414.tar.gz -o jetty9.tgz
+tar xf jetty9.tgz  --strip-components=1 -C /opt/jetty
+
+# Add a Jetty User
+useradd --user-group --shell /bin/false --home-dir /opt/jetty/temp jetty
+
+cd /opt/jetty
+# Add running as "jetty"
+java -jar /opt/jetty/start.jar --add-to-startd=setuid
+cd /
+
+# very important - by renaming the war to root.war, it will run as the root servlet.
+mv $WAR /opt/jetty/webapps/root.war
+
+# Make sure "jetty" owns everything.
+chown --recursive jetty /opt/jetty
+
+# Configure the default paths for the Jetty service
+cp /opt/jetty/bin/jetty.sh /etc/init.d/jetty
+echo "JETTY_HOME=/opt/jetty" > /etc/default/jetty
+{
+  echo "JETTY_BASE=/opt/jetty"
+  echo "TMPDIR=/opt/jetty/temp"
+  echo "JAVA_OPTIONS=-Djetty.http.port=8080"
+  echo "JETTY_LOGS=/var/log/jetty"
+} >> /etc/default/jetty
+
+
+# Reload daemon to pick up new service
+systemctl daemon-reload
+
+# Install logging monitor. The monitor will automatically pickup logs sent to syslog.
+curl -s "https://storage.googleapis.com/signals-agents/logging/google-fluentd-install.sh" | bash
+service google-fluentd restart &
+
+service jetty start
+service jetty check
+
+echo "Startup Complete"
+# [END startup_script_sh]

memorystore/redis/gce_deployment/teardown.sh

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+#!/bin/bash
+
+#  Copyright 2018 Google Inc.
+#
+#  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.
+# [START teardown_sh]
+gcloud compute instances delete my-instance
+
+gcloud compute firewall-rules delete allow-http-server-8080
+# [END teardown_sh]

memorystore/redis/gke_deployment/Dockerfile

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+#  Copyright 2018 Google Inc.
+#
+#  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.
+
+FROM launcher.gcr.io/google/jetty
+
+ADD target/visitcounter-1.0-SNAPSHOT.war $JETTY_BASE/webapps/root.war

memorystore/redis/gke_deployment/visit-counter.yaml

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+
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: visit-counter
+  labels:
+    app: visit-counter
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: visit-counter
+    spec:
+      containers:
+      - name: visit-counter
+        image: "gcr.io/<PROJECT_ID>/visit-counter:v1"
+        env:
+        - name: REDISHOST
+          valueFrom:
+            configMapKeyRef:
+              name: redishost
+              key: REDISHOST
+        ports:
+        - name: http
+          containerPort: 8080
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: visit-counter
+spec:
+  type: LoadBalancer
+  selector:
+    app: visit-counter
+  ports:
+  - port: 80
+    targetPort: 8080
+    protocol: TCP

memorystore/redis/pom.xml

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+<!--
+  Copyright 2018 Google Inc.
+
+  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.
+-->
+<project>
+  <modelVersion>4.0.0</modelVersion>
+  <packaging>war</packaging>
+  <version>1.0-SNAPSHOT</version>
+  <groupId>com.example.redis</groupId>
+  <artifactId>visitcounter</artifactId>
+
+  <!--
+    The parent pom defines common style checks and testing strategies for our samples.
+    Removing or replacing it should not affect the execution of the samples in anyway.
+  -->
+  <parent>
+    <groupId>com.google.cloud.samples</groupId>
+    <artifactId>shared-configuration</artifactId>
+    <version>1.0.8</version>
+  </parent>
+
+  <properties>
+    <maven.compiler.target>1.8</maven.compiler.target>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <jetty>9.4.4.v20170414</jetty>
+    <failOnMissingWebXml>false</failOnMissingWebXml>
+  </properties>
+
+  <!-- [START dependencies] -->
+  <dependencies>
+
+    <dependency>
+      <groupId>javax.servlet</groupId>
+      <artifactId>javax.servlet-api</artifactId>
+      <version>3.1.0</version>
+      <type>jar</type>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>redis.clients</groupId>
+      <artifactId>jedis</artifactId>
+      <version>2.9.0</version>
+    </dependency>
+  </dependencies>
+  <!-- [END dependencies] -->
+
+  <build>
+    <!-- for hot reload of the web application -->
+    <outputDirectory>servlet/target/visitcounter-1.0-SNAPSHOT/WEB-INF/classes</outputDirectory>
+    <plugins>
+      <!--- Only required to test application locally -->
+      <plugin>
+        <groupId>org.eclipse.jetty</groupId>
+        <artifactId>jetty-maven-plugin</artifactId>
+        <version>${jetty}</version>
+      </plugin>
+      <!-- [START appengine_maven_plugin]  -->
+      <!-- Deployment plugin for App Engine Flexible -->
+      <plugin>
+        <groupId>com.google.cloud.tools</groupId>
+        <artifactId>appengine-maven-plugin</artifactId>
+        <version>1.3.2</version>
+     </plugin>
+     <!-- [END appengine_maven_plugin] -->
+    </plugins>
+  </build>
+</project>