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+..
+ This work is licensed under a Creative Commons Attribution 3.0 Unported
+ License.
+
+ http://creativecommons.org/licenses/by/3.0/legalcode
+
+======================
+httppost Notifications
+======================
+
+launchpad blueprint:
+https://blueprints.launchpad.net/vitrage/+spec/httppost-notifications
+
+The Evaluator performs root cause analysis on the Vitrage Graph and may
+determine that an alarm should be created, deleted or otherwise updated.
+Other components are notified of such changes by the Vitrage Notifier service.
+Among others, Vitrage Notifier is responsible for sending http post
+notifications on Vitrage deduced alarms.
+
+This blueprint describes the implementation of Vitrage Notifier for
+http post notifications on Vitrage deduced alarms.
+
+
+Problem description
+===================
+
+Vitrage should support registering for http post notifications, and sending them
+on raised alarms, deactivated alarms, state changes, RCA or other to any
+registered targets.
+Furthermore any registered recipient should supply a regex to filter the alarms
+sent to that recipient.
+
+
+Proposed change
+===============
+
+Needed definitions in Vitrage config file::
+
+ [DEFAULT]
+ notifiers = httppost
+
+SSL Client certificate file for REST notifier. (string value) :
+ rest_notifier_certificate_file =
+
+SSL Client private key file for REST notifier. (string value)
+ rest_notifier_certificate_key =
+
+SSL CA_BUNDLE certificate for REST notifier (string value)
+ rest_notifier_ca_bundle_certificate_path = <None>
+
+Whether to verify the SSL Server certificate when calling alarm action (boolean value)
+ rest_notifier_ssl_verify = true
+
+Number of retries for REST notifier (integer value)
+ rest_notifier_max_retries = 0
+
+Timeout seconds for HTTP requests. Set it to None to disable timeout (integer value)
+ http_timeout = 600
+
+Vitrage listener will get the alarm events from the message bus and the http post
+notifier will send http post notifications on raised deduced alarms and deleted deduced alarms.
+
+The filtered notifications will be sent to destinations specified in registered yaml file or
+other (for now, only one option will be developed), which can be updated manually or via
+API requests.
+
+The notifications will be sent only on alarms which meet the regex filter specified in the
+yaml file / via registration. This section will be specified in a different spec.
+
+The format of sent notifications will be hard coded.
+
+The http post notifier is pluggable, you can implement your own http post sender and use
+it (it must inherit from the base class), when there is a default implementation.
+
+Alternatives
+------------
+
+None
+
+Data model impact
+-----------------
+
+None
+
+REST API impact
+---------------
+
+None
+
+Versioning impact
+-----------------
+
+None
+
+Other end user impact
+---------------------
+
+None
+
+Deployer impact
+---------------
+
+To use http post notifier one needs to define it in the Vitrage config
+file, and in addition create additional yaml files and define them in Vitrage config file.
+
+Developer impact
+----------------
+
+None
+
+Horizon impact
+--------------
+
+None
+
+Implementation
+==============
+
+Assignee(s)
+-----------
+
+Primary assignee:
+  danoffek
+
+Work Items
+----------
+
+- Create http post notifier
+
+  - Create http post sender
+
+- Create unit test for http post sender
+
+  - test http post notifier
+  - test http post sender
+  - test http post regex filtering
+
+Dependencies
+============
+
+None
+
+Testing
+=======
+
+This blueprint requires unit tests.
+
+Documentation Impact
+====================
+
+The usage of the http post notifier will be documented
+
+
+References
+==========
+
+Example on http post notifications in AODH
+`http post request <https://github.com/openstack/aodh/blob/master/aodh/notifier/rest.py#L60-L109>`_