[13.0][ADD] monitoring_prometheus (#239)

[13.0][ADD] monitoring_prometheus

monitoring_prometheus/README.rst

@@ -0,0 +1,17 @@
+.. image:: https://img.shields.io/badge/licence-AGPL--3-blue.svg
+    :alt: License
+
+==============================
+Monitoring: Prometheus metrics
+==============================
+
+Add an endpoint */metrics* to allow a Prometheus server to fetch application metrics.
+Current available metrics are:
+
+* Request completion time with 3 differentiators:
+  * Filestore
+  * Assets
+  * Everything else
+* Longpolling request count
+
+No additional configuration is needed, just ensure that the Prometheus server is allowed to communicate with Odoo

monitoring_prometheus/__init__.py

@@ -0,0 +1,2 @@
+from . import controllers
+from . import models

monitoring_prometheus/__manifest__.py

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+# Copyright 2016-2019 Camptocamp SA
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html)
+
+
+{
+    "name": "Monitoring: Prometheus Metrics",
+    "version": "13.0.1.0.0",
+    "author": "Camptocamp,Odoo Community Association (OCA)",
+    "license": "AGPL-3",
+    "category": "category",
+    "depends": [
+        "base",
+        "web",
+        "server_environment",
+    ],
+    "website": "http://www.camptocamp.com",
+    "data": [],
+    "external_dependencies": {
+        "python": ["prometheus_client"],
+    },
+    "installable": True,
+}

monitoring_prometheus/controllers/__init__.py

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+from . import prometheus_metrics

monitoring_prometheus/controllers/prometheus_metrics.py

@@ -0,0 +1,11 @@
+# Copyright 2016-2021 Camptocamp SA
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html)
+
+from odoo.http import Controller, route
+from prometheus_client import generate_latest
+
+
+class PrometheusController(Controller):
+    @route('/metrics', auth='public')
+    def metrics(self):
+        return generate_latest()

monitoring_prometheus/models/__init__.py

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+from . import ir_http

monitoring_prometheus/models/ir_http.py

@@ -0,0 +1,40 @@
+# Copyright 2016-2021 Camptocamp SA
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html)
+
+from odoo import models
+from odoo.http import request
+from prometheus_client import Summary, Counter
+
+
+REQUEST_TIME = Summary(
+    "request_latency_sec", "Request response time in sec", ["query_type"]
+)
+LONGPOLLING_COUNT = Counter("longpolling", "Longpolling request count")
+
+
+class IrHttp(models.AbstractModel):
+    _inherit = "ir.http"
+
+    @classmethod
+    def _dispatch(cls):
+        path_info = request.httprequest.environ.get("PATH_INFO")
+
+        if path_info.startswith("/longpolling/"):
+            LONGPOLLING_COUNT.inc()
+            return super()._dispatch()
+
+        if path_info.startswith("/metrics"):
+            return super()._dispatch()
+
+        if path_info.startswith("/web/static"):
+            label = "assets"
+        elif path_info.startswith("/web/content"):
+            label = "filestore"
+        else:
+            label = "client"
+
+        res = None
+        with REQUEST_TIME.labels(label).time():
+            res = super()._dispatch()
+
+        return res

requirements.txt

@@ -9,3 +9,4 @@ python-keystoneclient==3.22.0
 keystoneauth1==3.14.0
 # error with 5.x (ConstructorError: could not determine a constructor for the tag '!record')
 PyYAML==4.2b4
+prometheus_client==0.11.0