Get version loading in users backend

Author: jaimebuelta

ch11/microservices/thoughts_backend/ThoughtsBackend/thoughts_backend/app.py

@@ -1,3 +1,4 @@
+import os
 import logging
 from flask import Flask, request, has_request_context
 from flask import current_app, g
@@ -17,6 +18,7 @@
 METRIC_REQ_TIME = Histogram('req_time', 'Req time in ms',
                             ['endpoint', 'method', 'status_code'])
 
+VERSION = os.environ['VERSION_NAME']
 
 class RequestFormatter(logging.Formatter):
     ''' Inject the HTTP_X_REQUEST_ID to format logs '''
@@ -105,7 +107,7 @@ def create_app(script=False):
         # Do not propagate to avoid log duplication
         application.logger.propagate = False
 
-    api = Api(application, version='0.1', title='Thoughts Backend API',
+    api = Api(application, version=VERSION, title='Thoughts Backend API',
               description='A Simple CRUD API')
 
     from thoughts_backend.db import db, db_config

ch11/microservices/users_backend/UsersBackend/users_backend/admin_namespace.py

@@ -1,3 +1,4 @@
+import os
 import http.client
 from flask_restplus import Namespace, Resource, fields
 from datetime import datetime
@@ -43,3 +44,19 @@ def post(self):
         result = admin_namespace.marshal(new_user, user_model)
 
         return result, http.client.CREATED
+
+
+@admin_namespace.route('/version/')
+class Version(Resource):
+
+    @admin_namespace.doc('get_version')
+    def get(self):
+        '''
+        Return the version of the application
+        '''
+        data = {
+            'commit': os.environ['VERSION_SHA'],
+            'version': os.environ['VERSION_NAME'],
+        }
+
+        return data

ch11/microservices/users_backend/UsersBackend/users_backend/app.py

@@ -1,10 +1,13 @@
+import os
 from flask import Flask
 from flask_restplus import Api
 
 from prometheus_flask_exporter import PrometheusMetrics
 
 metrics = PrometheusMetrics(app=None)
 
+VERSION = os.environ.get('VERSION_NAME', 'BAD VERSION')
+
 
 def create_app():
     from users_backend.api_namespace import api_namespace
@@ -15,7 +18,7 @@ def create_app():
     # Initialise metrics
     metrics.init_app(application)
 
-    api = Api(application, version='0.1', title='Users Backend API',
+    api = Api(application, version=VERSION, title='Users Backend API',
               description='A Simple CRUD API')
 
     from users_backend.db import db, db_config

ch11/microservices/users_backend/build-test.sh

@@ -1,3 +1,3 @@
-VERSION_SHA=8bee3a8b48638c1f184d084dace3015dd9953b5e
-VERSION_NAME=v1.5
+VERSION_SHA=2f2d3214e35ea13eeb8655c490323a83df22f6d2
+VERSION_NAME=v2.3
 docker-compose build --build-arg VERSION_NAME=${VERSION_NAME} --build-arg VERSION_SHA=${VERSION_SHA}

ch11/microservices/users_backend/docker/app/Dockerfile

@@ -50,6 +50,12 @@ COPY --chown=uwsgi:uwsgi --from=compile-image /opt/venv /opt/venv
 # Be sure to activate the venv
 ENV PATH="/opt/venv/bin:$PATH"
 
+# Prepare the version
+ARG VERSION_SHA="BAD VERSION"
+ARG VERSION_NAME="BAD VERSION"
+ENV VERSION_SHA $VERSION_SHA
+ENV VERSION_NAME $VERSION_NAME
+
 # Copy the code
 COPY --chown=uwsgi:uwsgi UsersBackend/ /opt/code/
 

ch11/microservices/users_backend/docker/app/uwsgi.ini

@@ -10,5 +10,7 @@ processes=1
 max-requests=5000
 # Used to send commands to uWSGI
 master-fifo=/tmp/uwsgi-fifo
-# Log to the logger container
-logger = rsyslog:syslog:5140,users_backend_uwsgi
+if-not-env = NO_SYSLOG
+    # Log to the logger container
+    logger = rsyslog:syslog:5140,thoughts_backend_uwsgi
+end-if

ch11/microservices/users_backend/environment.env

@@ -4,3 +4,4 @@ POSTGRES_USER=postgres
 POSTGRES_PASSWORD=somepassword
 POSTGRES_PORT=5432
 POSTGRES_HOST=db
+NO_SYSLOG=true