feat: Add a Google Cloud Platform webhook receiver

Author: lotooo

webhooks/gcp/README.md

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+Google Cloud Platform Webhook
+==============
+
+Receive [GCP](https://cloud.google.com) alerts via webhook callbacks.
+
+For help, join [![Slack chat](https://img.shields.io/badge/chat-on%20slack-blue?logo=slack)](https://slack.alerta.dev)
+
+Installation
+------------
+
+Clone the GitHub repo and run:
+
+    $ python setup.py install
+
+Or, to install remotely from GitHub run:
+
+    $ pip install git+https://github.com/alerta/alerta-contrib.git#subdirectory=webhooks/atlas
+
+Note: If Alerta is installed in a python virtual environment then plugins
+need to be installed into the same environment for Alerta to dynamically
+discover them.
+
+Configuration
+-------------
+
+The custom webhook will be auto-detected and added to the list of available API endpoints.
+
+Add the Alerta API webhook URL in the GCP webhook section
+
+
+References
+----------
+
+  * GCP notifications: https://cloud.google.com/monitoring/support/notification-options#webhooks
+
+License
+-------
+
+Copyright (c) 2020 Matthieu Serrepuy. Available under the MIT License.
+

webhooks/gcp/alerta_gcp.py

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+from flask import request
+from alerta.models.alert import Alert
+from alerta.webhooks import WebhookBase
+import os
+import logging
+
+LOG = logging.getLogger('alerta.webhooks.gcp')
+
+class GoogleCloudPlatformWebhook(WebhookBase):
+
+    def incoming(self, query_string, payload):
+        gcp_alert = payload['incident']
+
+        if gcp_alert['state'] == 'OPEN':
+            severity = os.environ.get('GCP_DEFAULT_ALERT_SEVERITY', 'warning')
+        else:
+            severity = 'normal'
+
+        value = "N/A"
+        try:
+            value = gcp_alert['observed_value']
+        except:
+            LOG.error("Unable to real alert observed_value")
+
+        attributes = {
+            "incident-id": gcp_alert.get('incident_id'),
+            "documenation": gcp_alert.get('documentation'),
+            "Source Alert": gcp_alert.get('url')
+        }
+
+        return Alert(
+            resource=gcp_alert['resource_display_name'],
+            event=gcp_alert['policy_name'],
+            environment='Production',
+            severity=severity,
+            service=['GCP'],
+            group='Cloud',
+            value=value,
+            text=gcp_alert['summary'],
+            origin='gcp',
+            attributes=attributes,
+            raw_data=str(payload)
+        )

webhooks/gcp/setup.py

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+from setuptools import setup, find_packages
+
+version = '0.0.1'
+
+setup(
+    name="alerta-gcp",
+    version=version,
+    description='Alerta webhook for GCP',
+    url='https://github.com/alerta/alerta-contrib',
+    license='Apache License 2.0',
+    author='Matthieu Serrepuy',
+    author_email='[email protected]',
+    packages=find_packages(),
+    py_modules=['alerta_gcp'],
+    install_requires=[],
+    include_package_data=True,
+    zip_safe=True,
+    entry_points={
+        'alerta.webhooks': [
+          'gcp = alerta_gcp:GoogleCloudPlatformWebhook'
+        ]
+    }
+)