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Commit 79c3f79

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jabubakeandrewsg
jabubake
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andrewsg
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Adding Google Cloud Memorystore sample (GoogleCloudPlatform#1474)
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‎memorystore/redis/README.md

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# Getting started with Googe Cloud Memorystore
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Simple HTTP server example to demonstrate connecting to [Google Cloud Memorystore](https://cloud.google.com/memorystore/docs/redis).
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This sample uses the [redis-py client](https://github.com/andymccurdy/redis-py).
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## Running on GCE
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Follow the instructions in [this guide](https://cloud.google.com/memorystore/docs/redis/connect-redis-instance-gce) to deploy the sample application on a GCE VM.
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## Running on GKE
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Follow the instructions in [this guide](https://cloud.google.com/memorystore/docs/redis/connect-redis-instance-gke) to deploy the sample application on GKE.
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## Running on Google App Engine Flex
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Follow the instructions in [this guide](https://cloud.google.com/memorystore/docs/redis/connect-redis-instance-flex) to deploy the sample application on GAE Flex.

‎memorystore/redis/app.yaml

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# Copyright 2018 Google Inc.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# [START memorystore_app_yaml]
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runtime: python
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env: flex
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entrypoint: gunicorn -b :$PORT main:app
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runtime_config:
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python_version: 3
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# update with Redis instance host IP, port
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env_variables:
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REDISHOST: redis-ip
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REDISPORT: 6379
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# update with Redis instance network name
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network:
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name: default
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#[END memorystore_app_yaml]

‎memorystore/redis/gce_deployment/deploy.sh

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#!/bin/bash
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# Copyright 2018 Google Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# [START memorystore_deploy_sh]
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if [ -z "$REDISHOST" ]; then
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echo "Must set \$REDISHOST. For example: REDISHOST=127.0.0.1"
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exit 1
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fi
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if [ -z "$REDISPORT" ]; then
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echo "Must set \$REDISPORT. For example: REDISPORT=6379"
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exit 1
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fi
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if [ -z "$GCS_APP_LOCATION" ]; then
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echo "Must set \$GCS_APP_LOCATION. For example: GCS_APP_LOCATION=gs://my-bucket/app"
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exit 1
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fi
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if [ -z "$ZONE" ]; then
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ZONE=$(gcloud config get-value compute/zone -q)
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echo $ZONE
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fi
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#Upload the tar to GCS
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tar -cvf app.tar -C .. requirements.txt main.py
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# Copy to GCS bucket
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gsutil cp app.tar $GCS_APP_LOCATION
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# Create an instance
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gcloud compute instances create my-instance \
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--image-family=debian-8 \
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--image-project=debian-cloud \
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--machine-type=g1-small \
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--scopes cloud-platform \
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--metadata-from-file startup-script=startup-script.sh \
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--metadata app-location=$GCS_APP_LOCATION,redis-host=$REDISHOST,redis-port=$REDISPORT \
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--zone $ZONE \
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--tags http-server
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gcloud compute firewall-rules create allow-http-server-8080 \
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--allow tcp:8080 \
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--source-ranges 0.0.0.0/0 \
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--target-tags http-server \
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--description "Allow port 8080 access to http-server"
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# [END memorystore_deploy_sh]

‎memorystore/redis/gce_deployment/startup-script.sh

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#! /bin/bash
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# Copyright 2018 Google Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# [START memorystore_startup_script_sh]
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set -v
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# Talk to the metadata server to get the project id and location of application binary.
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PROJECTID=$(curl -s "http://metadata.google.internal/computeMetadata/v1/project/project-id" -H "Metadata-Flavor: Google")
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GCS_APP_LOCATION=$(curl -s "http://metadata.google.internal/computeMetadata/v1/instance/attributes/app-location" -H "Metadata-Flavor: Google")
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REDISHOST=$(curl -s "http://metadata.google.internal/computeMetadata/v1/instance/attributes/redis-host" -H "Metadata-Flavor: Google")
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REDISPORT=$(curl -s "http://metadata.google.internal/computeMetadata/v1/instance/attributes/redis-port" -H "Metadata-Flavor: Google")
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# Install dependencies from apt
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apt-get update
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apt-get install -yq \
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git build-essential supervisor python python-dev python-pip libffi-dev \
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libssl-dev
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# Install logging monitor. The monitor will automatically pickup logs send to
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# syslog.
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curl -s "https://storage.googleapis.com/signals-agents/logging/google-fluentd-install.sh" | bash
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service google-fluentd restart &
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gsutil cp $GCS_APP_LOCATION /app.tar
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mkdir -p /app
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tar -x -f /app.tar -C /app
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cd /app
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# Install the app dependencies
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pip install --upgrade pip virtualenv
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virtualenv /app/env
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/app/env/bin/pip install -r /app/requirements.txt
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# Create a pythonapp user. The application will run as this user.
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getent passwd pythonapp || useradd -m -d /home/pythonapp pythonapp
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chown -R pythonapp:pythonapp /app
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# Configure supervisor to run the Go app.
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cat >/etc/supervisor/conf.d/pythonapp.conf << EOF
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[program:pythonapp]
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directory=/app
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environment=HOME="/home/pythonapp",USER="pythonapp",REDISHOST=$REDISHOST,REDISPORT=$REDISPORT
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command=/app/env/bin/gunicorn main:app --bind 0.0.0:8080
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autostart=true
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autorestart=true
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user=pythonapp
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stdout_logfile=syslog
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stderr_logfile=syslog
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EOF
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supervisorctl reread
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supervisorctl update
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# [END memorystore_startup_script_sh]

‎memorystore/redis/gce_deployment/teardown.sh

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#!/bin/bash
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# Copyright 2018 Google Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# [START memorystore_teardown_sh]
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gcloud compute instances delete my-instance
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gcloud compute firewall-rules delete allow-http-server-8080
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# [END memorystore_teardown_sh]

‎memorystore/redis/gke_deployment/Dockerfile

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# The Google App Engine python runtime is Debian Jessie with Python installed
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# and various os-level packages to allow installation of popular Python
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# libraries. The source is on github at:
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# https://github.com/GoogleCloudPlatform/python-docker
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FROM gcr.io/google_appengine/python
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# Create a virtualenv for the application dependencies.
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# If you want to use Python 2, add the -p python2.7 flag.
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RUN virtualenv -p python3.4 /env
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# Set virtualenv environment variables. This is equivalent to running
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# source /env/bin/activate. This ensures the application is executed within
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# the context of the virtualenv and will have access to its dependencies.
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ENV VIRTUAL_ENV /env
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ENV PATH /env/bin:$PATH
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# Note: REDISHOST value here is only used for local testing
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# See README.md on how to inject environment variable as ConfigMap on GKE
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ENV REDISHOST 127.0.0.1
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ENV REDISPORT 6379
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# Install dependencies.
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ADD requirements.txt /app/requirements.txt
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RUN pip install -r /app/requirements.txt
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# Add application code.
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ADD . /app
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CMD ["gunicorn", "-b", "0.0.0.0:8080", "main:app"]
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‎memorystore/redis/gke_deployment/visit-counter.yaml

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

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# Copyright 2018 Google Inc.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# [START memorystore_main_py]
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import logging
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import os
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from flask import Flask
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import redis
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app = Flask(__name__)
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redis_host = os.environ.get('REDISHOST', 'localhost')
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redis_port = int(os.environ.get('REDISPORT', 6379))
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redis_client = redis.StrictRedis(host=redis_host, port=redis_port)
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@app.route('/')
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def index():
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value = redis_client.incr('counter', 1)
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return 'Visitor number: {}'.format(value)
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@app.errorhandler(500)
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def server_error(e):
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logging.exception('An error occurred during a request.')
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return """
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An internal error occurred: <pre>{}</pre>
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See logs for full stacktrace.
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""".format(e), 500
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if __name__ == '__main__':
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# This is used when running locally. Gunicorn is used to run the
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# application on Google App Engine. See entrypoint in app.yaml.
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app.run(host='127.0.0.1', port=8080, debug=True)
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# [END memorystore_main_py]

‎memorystore/redis/requirements.txt

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# Copyright 2018 Google Inc.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# [START memorystore_requirements]
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Flask==0.12.2
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gunicorn==19.7.1
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redis==2.10.5
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# [END memorystore_requirements]

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