chore: enable metrics using prometheus-flask-exporter (#755)

* chore: enable metrics using prometheus-flask-exporter

Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>

* chore: remove prefix and attempt to fix docker build failure

Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>

* move env to Dockefile

Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>

* move env to Dockefile

Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>

* fix test expectaion path

Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>

* opt: localize metric tracker to api_v2 blueprint

Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>

* chore: remove useless hacks on v2

Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>

* fix linter and unit test

Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>

* fix linter and unit test

Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>

* remove obsolute tests

Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>

* enable monitoring through Service definition

* remove unused decls

Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>

Author: arajkumar

Dockerfile

@@ -1,4 +1,4 @@
-FROM registry.access.redhat.com/ubi8/ubi-minimal
+FROM registry.access.redhat.com/ubi8/python-36:latest
 
 LABEL name="bayesian-api" \
       description="bayesian API server" \
@@ -9,16 +9,14 @@ LABEL name="bayesian-api" \
 
 ENV LANG=en_US.UTF-8 PYTHONDONTWRITEBYTECODE=1
 
-ADD ./requirements.txt /coreapi/
-ADD bayesian/ /coreapi/bayesian/
-
-RUN microdnf install python3 git && microdnf clean all
 RUN pip3 install --upgrade pip --no-cache-dir
+
+ADD ./requirements.txt /coreapi/
 RUN pip3 install -r /coreapi/requirements.txt --no-cache-dir
 
-ADD bayesian/scripts/entrypoint.sh /coreapi/bayesian/scripts/entrypoint.sh
-# generated by Makefile, contains build date and time
-RUN chmod +x /coreapi/bayesian/scripts/entrypoint.sh
 ADD hack/coreapi-release /etc/
+ADD bayesian/ /coreapi/bayesian/
+ADD bayesian/scripts/entrypoint.sh /coreapi/bayesian/scripts/entrypoint.sh
 
-ENTRYPOINT ["/coreapi/bayesian/scripts/entrypoint.sh"]
+ENV PROMETHEUS_MULTIPROC_DIR=/tmp
+ENTRYPOINT ["bash", "/coreapi/bayesian/scripts/entrypoint.sh"]

Makefile

@@ -26,7 +26,7 @@ fast-docker-build: coreapi-release
 	docker tag $(REGISTRY)/$(REPOSITORY):$(DEFAULT_TAG) $(IMAGE_NAME)
 
 test: fast-docker-build
-	./runtest.sh
+	./qa/runtest.sh
 
 get-image-name:
 	@echo $(REGISTRY)/$(REPOSITORY):$(DEFAULT_TAG)

bayesian/__init__.py

@@ -6,8 +6,7 @@
 from f8a_worker.setup_celery import init_selinon
 from flask import Flask
 from flask import g
-from flask import redirect
-from flask import url_for
+from flask.json import jsonify
 from flask_appconfig import AppConfig
 from flask_cache import Cache
 from flask_sqlalchemy import SQLAlchemy
@@ -58,8 +57,6 @@ def create_app(configfile=None):
     app.register_blueprint(api_v1)
     app.register_blueprint(api_v2)
     app.register_blueprint(user_api)
-    # Redirect to latest API version if /api is accessed
-    app.route('/api')(lambda: redirect(url_for('api_v2.apiendpoints__slashless')))
     # Likewise for base URL, and make that accessible by name
 
     # Configure CORS.
@@ -68,10 +65,13 @@ def create_app(configfile=None):
     CORS(app, resources={r"/user/*": {"origins": "*"}})
 
     @app.route('/')
+    @app.route('/api')
     def base_url():
-        return redirect(url_for('api_v2.apiendpoints__slashless'))
-
-    setup_logging(app)
+        endpoints = set()
+        for rule in app.url_map.iter_rules():
+            if rule.endpoint != 'static':
+                endpoints.add(rule.rule)
+        return jsonify({'paths': sorted(endpoints)})
 
     @app.before_request
     def set_current_user():
@@ -87,13 +87,13 @@ def access_control_allow_origin(response):
         response.headers["Allow"] = "GET, HEAD, OPTIONS, PATCH, POST, PUT"
         return response
 
+    setup_logging(app)
     return app
 
 
 init_selinon()
 
 app = create_app()
-
 SENTRY_DSN = os.environ.get("SENTRY_DSN", "")
 sentry = Sentry(app, dsn=SENTRY_DSN, logging=True, level=logging.ERROR)