68 |
69 |
70 | {% endfor %}
71 |
72 |
73 |
74 |
75 |
76 |
77 |
78 |
81 |
82 |
116 |
117 |
118 |
--------------------------------------------------------------------------------
/application/photoalbum/src/app.py:
--------------------------------------------------------------------------------
1 | #!/usr/bin/env python3
2 | # -*- coding: utf-8 -*-
3 |
4 | # Copyright 2018 Google LLC
5 | #
6 | # Licensed under the Apache License, Version 2.0 (the "License");
7 | # you may not use this file except in compliance with the License.
8 | # You may obtain a copy of the License at
9 | #
10 | # http://www.apache.org/licenses/LICENSE-2.0
11 | #
12 | # Unless required by applicable law or agreed to in writing, software
13 | # distributed under the License is distributed on an "AS IS" BASIS,
14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 | # See the License for the specific language governing permissions and
16 | # limitations under the License.
17 |
18 |
19 | import os
20 | import tempfile
21 | import uuid
22 |
23 | from auth_decorator import requires_auth
24 | from flask import Flask, render_template, request, redirect, url_for
25 | from flask_sqlalchemy import SQLAlchemy
26 | from flask_wtf.file import FileField
27 | from sqlalchemy import desc
28 | from werkzeug.datastructures import CombinedMultiDict
29 | from werkzeug.utils import secure_filename
30 | from wtforms import Form, ValidationError
31 |
32 | from google.cloud import storage, pubsub_v1
33 |
34 |
35 | project_id = os.environ['PROJECT_ID']
36 | dbuser = os.environ['DB_USER']
37 | dbpass = os.environ['DB_PASS']
38 |
39 |
40 | app = Flask(__name__)
41 | app.config['SQLALCHEMY_DATABASE_URI'] = \
42 | 'mysql+pymysql://{}:{}@localhost:3306/photo_db'.format(dbuser, dbpass)
43 | app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
44 | app.app_context().push()
45 | db = SQLAlchemy(app)
46 | bucket_name = '{}-photostore'.format(project_id)
47 | bucket = storage.Client().get_bucket(bucket_name)
48 | storage_path = 'https://storage.googleapis.com/{}'.format(bucket_name)
49 |
50 |
51 | content_types = {'jpg': 'image/jpeg', 'jpeg': 'image/jpeg',
52 | 'png': 'image/png', 'gif': 'image/gif'}
53 | extensions = sorted(content_types.keys())
54 |
55 |
56 | @app.before_request
57 | @requires_auth
58 | def before_request():
59 | pass
60 |
61 |
62 | class Photo(db.Model):
63 | id = db.Column(db.Integer, primary_key=True)
64 | filename = db.Column(db.String(128))
65 | label = db.Column(db.String(64))
66 | has_thumbnail = db.Column(db.Boolean)
67 |
68 | def __init__(self, filename):
69 | self.filename = filename
70 | self.label = None
71 | self.has_thumbnail = False
72 |
73 |
74 | db.create_all()
75 |
76 |
77 | def publish_message(topic_name, data):
78 | publisher = pubsub_v1.PublisherClient()
79 | topic_path = publisher.topic_path(project_id, topic_name)
80 | publisher.publish(topic_path, data.encode('utf-8'))
81 |
82 |
83 | def is_photo():
84 | def _is_photo(_, field):
85 | if not field.data:
86 | raise ValidationError('No file')
87 | if field.data and \
88 | field.data.filename.split('.')[-1].lower() not in extensions:
89 | raise ValidationError('Invalid file name')
90 | return _is_photo
91 |
92 |
93 | class UploadForm(Form):
94 | input_photo = FileField('Photo file (jpg, jpeg, png, gif)',
95 | validators=[is_photo()])
96 |
97 |
98 | @app.route('/')
99 | def index():
100 | return render_template('index.html')
101 |
102 |
103 | def show_photos(form):
104 | last_photos = Photo.query.order_by(desc(Photo.id)).limit(10)
105 | last_photos = [photo for photo in last_photos]
106 | return render_template('photos.html', form=form, storage_path=storage_path,
107 | photos=last_photos)
108 |
109 |
110 | @app.route('/photos')
111 | def photos():
112 | form = UploadForm(request.form)
113 | return show_photos(form)
114 |
115 |
116 | @app.route('/post', methods=['POST'])
117 | def post():
118 | form = UploadForm(CombinedMultiDict((request.files, request.form)))
119 | if request.method == 'POST' and form.validate():
120 | filename = '{}.{}'.format(
121 | str(uuid.uuid4()),
122 | secure_filename(form.input_photo.data.filename))
123 | content_type = content_types[filename.split('.')[-1].lower()]
124 | with tempfile.NamedTemporaryFile() as temp:
125 | form.input_photo.data.save(temp.name)
126 | blob = bucket.blob(filename)
127 | blob.upload_from_filename(temp.name, content_type=content_type)
128 | blob.make_public()
129 | db.session.add(Photo(filename))
130 | db.session.commit()
131 | publish_message('thumbnail-service', filename)
132 | return show_photos(form)
133 |
134 |
135 | @app.route('/delete', methods=['POST'])
136 | def delete():
137 | photo_id = list(request.form.keys())[0]
138 | photo = db.session.query(Photo).filter_by(id=photo_id).first()
139 | bucket.delete_blobs(
140 | [photo.filename, 'thumbnails/{}'.format(photo.filename)],
141 | on_error=lambda _: None)
142 | db.session.delete(photo)
143 | db.session.commit()
144 | return redirect(url_for('photos'))
145 |
146 |
147 | if __name__ == '__main__':
148 | app.run(host='0.0.0.0', port=8080, debug=False)
149 |
--------------------------------------------------------------------------------
/application/thumbnail/src/worker.py:
--------------------------------------------------------------------------------
1 | #!/usr/bin/env python3
2 | # -*- coding: utf-8 -*-
3 |
4 | # Copyright 2018 Google LLC
5 | #
6 | # Licensed under the Apache License, Version 2.0 (the "License");
7 | # you may not use this file except in compliance with the License.
8 | # You may obtain a copy of the License at
9 | #
10 | # http://www.apache.org/licenses/LICENSE-2.0
11 | #
12 | # Unless required by applicable law or agreed to in writing, software
13 | # distributed under the License is distributed on an "AS IS" BASIS,
14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 | # See the License for the specific language governing permissions and
16 | # limitations under the License.
17 |
18 |
19 | import logging
20 | import os
21 | import sys
22 | import tempfile
23 |
24 | from flask import Flask
25 | from flask_sqlalchemy import SQLAlchemy
26 | from PIL import Image
27 |
28 | from google.cloud import pubsub_v1, storage, vision
29 |
30 |
31 | project_id = os.environ['PROJECT_ID']
32 | dbuser = os.environ['DB_USER']
33 | dbpass = os.environ['DB_PASS']
34 |
35 | subscription_name = 'thumbnail-workers'
36 | bucket_name = '{}-photostore'.format(project_id)
37 | content_types = {'jpg': 'image/jpeg', 'jpeg': 'image/jpeg',
38 | 'png': 'image/png', 'gif': 'image/gif'}
39 |
40 | app = Flask(__name__)
41 | app.config['SQLALCHEMY_DATABASE_URI'] = \
42 | 'mysql+pymysql://{}:{}@localhost:3306/photo_db'.format(dbuser, dbpass)
43 | app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
44 | app.app_context().push()
45 | db = SQLAlchemy(app)
46 |
47 | subscriber = pubsub_v1.SubscriberClient()
48 | subscription_path = subscriber.subscription_path(
49 | project_id, subscription_name)
50 |
51 | def setup_logger():
52 | logger = logging.getLogger(__name__)
53 | logger.propagate = False
54 | stdout_handler = logging.StreamHandler(sys.stdout)
55 | stdout_handler.setLevel(logging.DEBUG)
56 | stdout_handler.addFilter(lambda r: r.levelno < logging.WARNING)
57 | logger.addHandler(stdout_handler)
58 |
59 | stderr_handler = logging.StreamHandler(sys.stderr)
60 | stderr_handler.setLevel(logging.DEBUG)
61 | stderr_handler.addFilter(lambda r: r.levelno >= logging.WARNING)
62 | logger.addHandler(stderr_handler)
63 | logger.setLevel(logging.DEBUG)
64 |
65 |
66 | class Photo(db.Model):
67 | id = db.Column(db.Integer, primary_key=True)
68 | filename = db.Column(db.String(128))
69 | label = db.Column(db.String(64))
70 | has_thumbnail = db.Column(db.Boolean)
71 |
72 | def __init__(self, filename):
73 | self.filename = filename
74 | self.label = None
75 | self.has_thumbnail = False
76 |
77 |
78 | def create_thumbnail(filename):
79 | logger = logging.getLogger(__name__)
80 | bucket = storage.Client().get_bucket(bucket_name)
81 |
82 | logger.info('Creating a thumbnail: {}'.format(filename))
83 | with tempfile.NamedTemporaryFile() as temp:
84 | blob = bucket.blob(filename)
85 | blob.download_to_filename(temp.name)
86 | im = Image.open(temp.name)
87 | im.thumbnail((128, 128), Image.ANTIALIAS)
88 |
89 | extention = filename.split('.')[-1].lower()
90 | temp_filename = '{}.{}'.format(temp.name, extention)
91 | im.save(temp_filename)
92 | content_type = content_types[extention]
93 | blob = bucket.blob('thumbnails/{}'.format(filename))
94 | blob.upload_from_filename(temp_filename, content_type=content_type)
95 | blob.make_public()
96 | logger.info('Created a thumbnail: {}'.format(filename))
97 |
98 |
99 | def update_db(filename):
100 | logger = logging.getLogger(__name__)
101 | vision_client = vision.ImageAnnotatorClient()
102 | image = vision.Image()
103 | image.source.image_uri = 'gs://{}/{}'.format(bucket_name, filename)
104 | logger.info('Detecting labels: {}'.format(filename))
105 | response = vision_client.label_detection(image=image, max_results=3)
106 | labels = [label.description for label in response.label_annotations]
107 | logger.info('Detected labels for {}: {}'.format(
108 | filename, ', '.join(labels)))
109 |
110 | logger.info('Updating the database: {}'.format(filename))
111 | with app.app_context():
112 | photo = db.session.query(Photo).filter_by(filename=filename).first()
113 | photo.label = ', '.join(labels)
114 | photo.has_thumbnail = True
115 | db.session.commit()
116 | logger.info('Updated the database: {}'.format(filename))
117 |
118 |
119 | def callback(message):
120 | logger = logging.getLogger(__name__)
121 | try:
122 | filename = message.data.decode()
123 | logger.info('Processing a file: {}'.format(filename))
124 | message.ack()
125 | create_thumbnail(filename)
126 | update_db(filename)
127 | logger.info('Processed a file: {}'.format(filename))
128 | except Exception as e:
129 | logger.error('Something wrong happened: {}'.format(e.args))
130 |
131 |
132 | setup_logger()
133 |
134 | streaming_pull_future = subscriber.subscribe(
135 | subscription_path, callback=callback)
136 | logger = logging.getLogger(__name__)
137 | logger.info('Waiting for messages on {}'.format(subscription_path))
138 |
139 | with subscriber:
140 | try:
141 | streaming_pull_future.result()
142 | except TimeoutError:
143 | streaming_pull_future.cancel()
144 | streaming_pull_future.result()
145 |
146 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | # GKE Photo Album Example
2 |
3 | Disclaimer: This is not an official Google product.
4 |
5 | This is an example application demonstrating how Cloud Pub/Sub can be used
6 | to implement asynchronous service calls for applications running on GKE.
7 |
8 | 
9 |
10 | ## Products
11 | - [Kubernetes Engine][1]
12 | - [Cloud Storage][2]
13 | - [Cloud Pub/Sub][3]
14 | - [Cloud SQL][4]
15 | - [Cloud Build][5]
16 | - [Cloud Vision][6]
17 |
18 | ## Language
19 | - [Python][7]
20 |
21 | [1]: https://cloud.google.com/kubernetes-engine//docs
22 | [2]: https://cloud.google.com/storage/
23 | [3]: https://cloud.google.com/pubsub/
24 | [4]: https://cloud.google.com/sql/
25 | [5]: https://cloud.google.com/cloud-build/
26 | [6]: https://cloud.google.com/vision/
27 | [7]: https://python.org
28 |
29 | ## Prerequisites
30 | 1. A Google Cloud Platform Account
31 | 2. [A new Google Cloud Platform Project][8] for this lab with billing enabled
32 | 3. Enable the following APIs from
33 | [the API Manager][9]
34 |
35 | - Kubernetes Engine API
36 | - Cloud SQL Admin API
37 | - Cloud Build API
38 | - Cloud Vision API
39 | - Artifact Registry API
40 |
41 | [8]: https://console.developers.google.com/project
42 | [9]: https://console.developers.google.com
43 |
44 | ## Do this first
45 | In this section you will start your [Google Cloud Shell][10] and clone the
46 | application code repository to it.
47 |
48 | 1. [Open the Cloud Console][11]
49 |
50 | 2. Click the Google Cloud Shell icon in the top-right and wait for your shell
51 | to open:
52 |
53 | 
54 |
55 | 3. Clone the lab repository in your cloud shell, then `cd` into that dir:
56 |
57 | ```
58 | git clone https://github.com/GoogleCloudPlatform/gke-photoalbum-example.git
59 | cd gke-photoalbum-example
60 | ```
61 |
62 | [10]: https://cloud.google.com/cloud-shell/docs/
63 | [11]: https://console.cloud.google.com/
64 |
65 |
66 | ## Deploy Photo Album Application
67 |
68 | ### Prepare Storage Bucket
69 |
70 | Create a storage bucket from the Cloud Shell.
71 |
72 | ```
73 | export PROJECT_ID=$(gcloud config list project --format "value(core.project)")
74 | gsutil mb -c regional -l us-central1 gs://${PROJECT_ID}-photostore
75 | ```
76 |
77 | Upload the default thumbnail file and make it public.
78 |
79 | ```
80 | gsutil cp ./application/photoalbum/images/default.png gs://${PROJECT_ID}-photostore/thumbnails/default.png
81 | gsutil acl ch -u AllUsers:R gs://${PROJECT_ID}-photostore/thumbnails/default.png
82 | ```
83 |
84 | ### Create CloudSQL Instance
85 |
86 | Create a CloudSQL instance for MySQL database.
87 |
88 | - Use "MySQL Development" instance.
89 | - Set Instance ID as `photoalbum-db`.
90 | - Set Root password as your choice.
91 | - Open "Enable auto backups and high availability" and uncheck "Automate backups".
92 | - Others can be left as default.
93 |
94 | When the instance creation has been completed, click on the Instance ID name (`photoalbum-db`) and check the Instance connection name. The connection name will be `[Project ID]:us-central1:photoalbum-db` if you chose the configuration options as above.
95 |
96 | Connect to the CloudSQL instance from the Cloud Shell and create database `photo_db` and application user `appuser`.
97 |
98 | ```
99 | gcloud sql connect photoalbum-db --user=root --quiet
100 |
101 | CREATE DATABASE photo_db;
102 | CREATE USER 'appuser'@'%' IDENTIFIED BY 'pas4appuser';
103 | GRANT ALL ON photo_db.* TO 'appuser'@'%' WITH GRANT OPTION;
104 | FLUSH PRIVILEGES;
105 | exit
106 | ```
107 |
108 | ### Create Pub/Sub Topic and Subscription
109 |
110 | ```
111 | gcloud pubsub topics create thumbnail-service
112 | gcloud pubsub subscriptions create --topic thumbnail-service thumbnail-workers
113 | ```
114 |
115 | ### Create GKE cluster
116 |
117 | - Set cluster name as `photoalbum-cluster`.
118 | - Set Number of nodes as `5`.
119 | - Set Access scopes as "Allow full access to all Cloud APIs".
120 | - Set Zone as `us-central1-a`
121 | - Others can be left as default.
122 |
123 | ### Create Artifact Registry Repository
124 |
125 | ```
126 | gcloud artifacts repositories create photoalbum-repo --repository-format=docker --location=us-central1 --description="Docker repository"
127 | ```
128 |
129 | ### Build Container Images
130 |
131 | This application has a simple user authentication mechanism. You can change the username and password by modifying the following part in `application/photoalbum/src/auth_decorator.py`.
132 |
133 | ```
134 | USERNAME = 'username'
135 | PASSWORD = 'passw0rd'
136 | ```
137 |
138 | Build container images using Cloud Build.
139 |
140 | ```
141 | export PROJECT_ID=$(gcloud config list project --format "value(core.project)")
142 | gcloud builds submit ./application/photoalbum -t us-central1-docker.pkg.dev/$PROJECT_ID/photoalbum-repo/photoalbum-app
143 | gcloud builds submit ./application/thumbnail -t us-central1-docker.pkg.dev/$PROJECT_ID/photoalbum-repo/thumbnail-worker
144 | ```
145 |
146 | Check image digests.
147 |
148 | ```
149 | gcloud container images describe us-central1-docker.pkg.dev/$PROJECT_ID/photoalbum-repo/photoalbum-app:latest --format "value(image_summary.digest)"
150 | gcloud container images describe us-central1-docker.pkg.dev/$PROJECT_ID/photoalbum-repo/thumbnail-worker:latest --format "value(image_summary.digest)"
151 | ```
152 |
153 | ### Deploy Application
154 |
155 | Modify the config file `config/photoalbum-deployment.yaml`.
156 |
157 | - Change `[PROJECT_ID]` to your project id.
158 | - Change `[CONNECTION_NAME]` to Cloud SQL's connection name that you have checked in the section "Create CloudSQL Instance".
159 | - Change `[DIGEST]` to the image digest of Photo Album application that you have checked in the previous step.
160 |
161 | Modify the config file `config/thumbnail-deployment.yaml`.
162 | - Change `[PROJECT_ID]` to your project id.
163 | - Change `[CONNECTION_NAME]` to Cloud SQL's connection name that you have checked in the section "Create CloudSQL Instance".
164 | - Change `[DIGEST]` to the image digest of Thumbnail Generation service that you have checked in the previous step.
165 |
166 | You can copy-and-paste the following commands to apply these modifications.
167 |
168 | ```
169 | PROJECT_ID=$(gcloud config list project --format "value(core.project)")
170 | connection_name=$(gcloud sql instances describe photoalbum-db --format "value(connectionName)")
171 |
172 | digest_photoalbum=$(gcloud container images describe us-central1-docker.pkg.dev/$PROJECT_ID/photoalbum-repo/photoalbum-app:latest --format "value(image_summary.digest)")
173 | sed -i.bak "s/\[PROJECT_ID\]/$PROJECT_ID/;s/\[CONNECTION_NAME\]/$connection_name/;s/\[DIGEST\]/$digest_photoalbum/" config/photoalbum-deployment.yaml
174 |
175 | digest_thumbnail=$(gcloud container images describe us-central1-docker.pkg.dev/$PROJECT_ID/photoalbum-repo/thumbnail-worker:latest --format "value(image_summary.digest)")
176 | sed -i.bak "s/\[PROJECT_ID\]/$PROJECT_ID/;s/\[CONNECTION_NAME\]/$connection_name/;s/\[DIGEST\]/$digest_thumbnail/" config/thumbnail-deployment.yaml
177 | ```
178 |
179 | Create GKE resources.
180 |
181 | ```
182 | gcloud container clusters get-credentials photoalbum-cluster --zone us-central1-a
183 | kubectl create -f config/photoalbum-deployment.yaml
184 | kubectl create -f config/thumbnail-deployment.yaml
185 | kubectl create -f config/photoalbum-service.yaml
186 | ```
187 |
188 | ### Test Application
189 |
190 | Confirm that there are three pods for each of photoalbum-app and thembail-worker with STATUS Running, and EXTERNAL-IP is assigned to photoalbum-service. It may take a few minutes until they are all set and running.
191 |
192 | ```
193 | $ kubectl get pods
194 | NAME READY STATUS RESTARTS AGE
195 | photoalbum-app-555f7cbdb7-cp8nw 2/2 Running 0 2m
196 | photoalbum-app-555f7cbdb7-ftlc6 2/2 Running 0 2m
197 | photoalbum-app-555f7cbdb7-xsr4b 2/2 Running 0 2m
198 | thumbnail-worker-86bd95cd68-728k5 2/2 Running 0 2m
199 | thumbnail-worker-86bd95cd68-hqxqr 2/2 Running 0 2m
200 | thumbnail-worker-86bd95cd68-xnxhc 2/2 Running 0 2m
201 |
202 | $ kubectl get services
203 | NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
204 | kubernetes ClusterIP 10.23.240.1 443/TCP 20m
205 | photoalbum-service LoadBalancer 10.23.253.241 146.148.111.115 80:32657/TCP 2m
206 | ```
207 |
208 | Now you can try the application thorugh the URI `http://[EXTERNAL-IP]`.
209 |
210 | ## Adding Safeimage Feature
211 |
212 | You add a safeimage feature that detect offensive images and blur them automatically.
213 |
214 | ### Create Pub/Sub Topic and Subscription
215 |
216 | ```
217 | gcloud pubsub topics create safeimage-service
218 | gcloud pubsub subscriptions create --topic safeimage-service safeimage-workers
219 | ```
220 |
221 | ### Setup Pub/Sub Notification
222 | ```
223 | export PROJECT_ID=$(gcloud config list project --format "value(core.project)")
224 | gsutil notification create -t safeimage-service -f json gs://${PROJECT_ID}-photostore
225 | ```
226 |
227 | ### Build Container Image
228 |
229 | Build a container image using Cloud Build.
230 |
231 | ```
232 | export PROJECT_ID=$(gcloud config list project --format "value(core.project)")
233 | gcloud builds submit ./application/safeimage -t us-central1-docker.pkg.dev/$PROJECT_ID/photoalbum-repo/safeimage-worker
234 | ```
235 |
236 | Check an image digest.
237 |
238 | ```
239 | gcloud container images describe us-central1-docker.pkg.dev/$PROJECT_ID/photoalbum-repo/safeimage-worker:latest --format "value(image_summary.digest)"
240 | ```
241 |
242 | ### Deploy application
243 |
244 | Modify the config file `config/safeimage-deployment.yaml`.
245 |
246 | - Change `[PROJECT_ID]` to your project id.
247 | - Change `[DIGEST]` to the image digest of Safeimage service that you have checked in the previous step.
248 |
249 | You can copy-and-paste the following commands to apply these modifications.
250 |
251 | ```
252 | digest_safeimage=$(gcloud container images describe us-central1-docker.pkg.dev/$PROJECT_ID/photoalbum-repo/safeimage-worker:latest --format "value(image_summary.digest)")
253 | sed -i.bak "s/\[PROJECT_ID\]/$PROJECT_ID/;s/\[CONNECTION_NAME\]/$connection_name/;s/\[DIGEST\]/$digest_safeimage/" config/safeimage-deployment.yaml
254 | ```
255 |
256 | Create a deployment resource to roll out Safeimage service.
257 | ```
258 | kubectl create -f config/safeimage-deployment.yaml
259 | ```
260 |
261 | Confirm that there are three pods of safeimage-worker with STATUS Running. It may take a few minutes until they are all set and running.
262 |
263 | ```
264 | $ kubectl get pods
265 | NAME READY STATUS RESTARTS AGE
266 | photoalbum-app-555f7cbdb7-cp8nw 2/2 Running 0 30m
267 | photoalbum-app-555f7cbdb7-ftlc6 2/2 Running 0 30m
268 | photoalbum-app-555f7cbdb7-xsr4b 2/2 Running 8 30m
269 | safeimage-worker-7dc8c84f54-6sqzs 1/1 Running 0 2m
270 | safeimage-worker-7dc8c84f54-9bskw 1/1 Running 0 2m
271 | safeimage-worker-7dc8c84f54-b7gtp 1/1 Running 0 2m
272 | thumbnail-worker-86bd95cd68-9wrpv 2/2 Running 0 30m
273 | thumbnail-worker-86bd95cd68-kbhsn 2/2 Running 2 30m
274 | thumbnail-worker-86bd95cd68-n4rj7 2/2 Running 0 30m
275 | ```
276 |
277 | Test the feature using the sample file of a [violent picture](https://pixabay.com/en/zombie-flesh-eater-dead-spooky-949916/). (This is a picture of a zombie biting a human.)
278 |
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
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