Middleware and Notification examples
Includes: - swift ceilometer middleware configuration and usage - picasso swift middleware for file post-processing that is being uploaded Change-Id: Id1ef827c62f4c43175f019b8761b7ca9d84bed84
This commit is contained in:
Denis Makogon
parent
1157060ce6
commit
60a39fec35
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Swift metering notification
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===========================
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DevStack plugins configuration
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------------------------------
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Required DevStack plugins::
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Panko
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Ceilometer
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Aodh
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Picasso
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local.conf::
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[[local|localrc]]
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ADMIN_PASSWORD=root
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DATABASE_PASSWORD=root
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RABBIT_PASSWORD=root
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SERVICE_PASSWORD=root
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SERVICE_TOKEN=root
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enable_service s-proxy s-object s-container s-account
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enable_plugin panko https://git.openstack.org/openstack/panko
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enable_plugin ceilometer https://git.openstack.org/openstack/ceilometer
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enable_plugin aodh https://git.openstack.org/openstack/aodh
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enable_service aodh-evaluator aodh-notifier aodh-api
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disable_service ceilometer-alarm-notifier ceilometer-alarm-evaluator
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enable_plugin picasso git@github.com:openstack/picasso.git
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By default Ceilometer DevStack plugin installs python-ceilometermiddleware for Swift as its proxy API middleware that sends notifications through message queue to a specific topic ("notifications" by default)
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Configuring Ceilometer event pipeline
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-------------------------------------
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To enable this functionality, configure Ceilometer to be able to publish events to the queue the aodh-listener service listen on.
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The event_alarm_topic config option of Aodh identifies which messaging topic the aodh-listener on, the default value is “alarm.all”.
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Ceilometer publisher needs to be configured using pipeline configuration file (**event_pipeline.yaml** as default) to send events "alarm.all" topic::
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---
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sources:
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- name: event_source
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events:
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- "*"
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sinks:
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- event_sink
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sinks:
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- name: event_sink
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transformers:
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publishers:
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- notifier://
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- notifier://?topic=alarm.all
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Collecting events from Swift
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----------------------------
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On each API request, Swift emits (through python-ceilometermiddleware) notifications to a message queue.
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Those notifications are being transformed into Ceilometer/Panko events and available via Ceilometer API.
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Setting up alarms based on Swift notifications
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----------------------------------------------
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Once DevStack is installed, create a Picasso app::
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openstack fn apps create alarm-notifier-app
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Create a route::
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openstack fn routes create alarm-notifier-app-5a3e626d281 /hello async iron/hello --is-public
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After that setup Aodh alarm::
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aodh alarm create --event-type objectstore.http.request \
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--description objectstore_request --period 600 --evaluation-periods 1 \
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--alarm-action $(openstack fn routes expose-url alarm-notifier-app-5a3e626d281 /hello) \
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--name objectstore_request \
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--type event --ok-action $(openstack fn routes expose-url alarm-notifier-app-5a3e626d281 /hello)
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This alarm would be triggered per each **objectstore.http.request** event in queue and one of the actions (alarm action or OK action) will be executed
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by submitting POST request with event data.
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In Aodh (aodh-notifier) logs we can see that event alarm URL is being triggered::
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2017-02-16 15:45:14.802 29717 DEBUG aodh.notifier [-] Received 1 messages in batch. sample /opt/stack/aodh/aodh/notifier/__init__.py:98
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2017-02-16 15:45:14.803 29717 DEBUG aodh.notifier [-] Notifying alarm 5a911a27-487c-49d4-a4da-68b209eda2cc with action SplitResult(scheme=u'http', netloc=u'192.168.0.114:10001', path=u'/r/alarm-notifier-app-5a3e626d281/hello', query='', fragment='') _handle_action /opt/stack/aodh/aodh/notifier/__init__.py:138
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2017-02-16 15:45:14.804 29717 INFO aodh.notifier.rest [-] Notifying alarm objectstore_request 5a911a27-487c-49d4-a4da-68b209eda2cc with severity low from insufficient data to alarm with action SplitResult(scheme=u'http', netloc=u'192.168.0.114:10001', path=u'/r/alarm-notifier-app-5a3e626d281/hello', query='', fragment='') because Event <id=52346005-00d3-4789-9347-1a29bdddde18,event_type=objectstore.http.request> hits the query <query=[]>.. request-id: req-cd265735-ef58-468d-aca3-65e3add9a03c
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2017-02-16 15:45:15.041 29717 INFO aodh.notifier.rest [-] Notifying alarm <5a911a27-487c-49d4-a4da-68b209eda2cc> gets response: 200 OK.
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Also (in aodh-listener)::
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2017-02-16 15:56:57.542 29761 DEBUG aodh.evaluator.event [-] Evaluating event: event = {u'event_type': u'objectstore.http.request', u'traits': [[u'typeURI', 1, u'http://schemas.dmtf.org/cloud/audit/1.0/event'], [u'eventTime', 1, u'2017-02-16T13:56:54.322957'], [u'outcome', 1, u'success'], [u'user_id', 1, u'106a49d7d2fe4bc99792a3a95195b843'], [u'initiator_typeURI', 1, u'service/security/account/user'], [u'service', 1, u'ceilometermiddleware'], [u'target_id', 1, u'af2f24bca17e4d7f974c5a07012636db'], [u'observer_id', 1, u'target'], [u'initiator_id', 1, u'106a49d7d2fe4bc99792a3a95195b843'], [u'eventType', 1, u'activity'], [u'target_typeURI', 1, u'service/storage/object'], [u'action', 1, u'read'], [u'project_id', 1, u'04108819f6294723ba539b73b0c40a03'], [u'id', 1, u'b2552bc9-20ad-516c-a9ae-e58a7e016e82']], u'message_signature': u'364eec8d900cac2cc99679b5d171d279c32138114b93250e2954782d1f961c54', u'raw': {}, u'generated': u'2017-02-16T13:56:54.323449', u'message_id': u'6531d952-07f7-4534-aaf2-b6be3934f831'} evaluate_events /opt/stack/aodh/aodh/evaluator/event.py:167
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2017-02-16 15:56:57.543 29761 DEBUG aodh.evaluator.event [-] Finished event alarm evaluation. evaluate_events /opt/stack/aodh/aodh/evaluator/event.py:184
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However the data that is being sent to functions does not contain any useful information regarding actual resources that were modified, so no way to get the information on it.
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Alternative
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-----------
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As part of Picasso distribution, Swift middleware is available, see https://github.com/openstack/picasso/tree/master/examples/python-picassomiddleware
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@ -0,0 +1,89 @@
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# Byte-compiled / optimized / DLL files
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__pycache__/
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*.py[cod]
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*$py.class
|
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|
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# C extensions
|
||||
*.so
|
||||
|
||||
# Distribution / packaging
|
||||
.Python
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||||
env/
|
||||
build/
|
||||
develop-eggs/
|
||||
dist/
|
||||
downloads/
|
||||
eggs/
|
||||
.eggs/
|
||||
lib/
|
||||
lib64/
|
||||
parts/
|
||||
sdist/
|
||||
var/
|
||||
*.egg-info/
|
||||
.installed.cfg
|
||||
*.egg
|
||||
|
||||
# PyInstaller
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||||
# Usually these files are written by a python script from a template
|
||||
# before PyInstaller builds the exe, so as to inject date/other infos into it.
|
||||
*.manifest
|
||||
*.spec
|
||||
|
||||
# Installer logs
|
||||
pip-log.txt
|
||||
pip-delete-this-directory.txt
|
||||
|
||||
# Unit test / coverage reports
|
||||
htmlcov/
|
||||
.tox/
|
||||
.coverage
|
||||
.coverage.*
|
||||
.cache
|
||||
nosetests.xml
|
||||
coverage.xml
|
||||
*,cover
|
||||
.hypothesis/
|
||||
|
||||
# Translations
|
||||
*.mo
|
||||
*.pot
|
||||
|
||||
# Django stuff:
|
||||
*.log
|
||||
local_settings.py
|
||||
|
||||
# Flask stuff:
|
||||
instance/
|
||||
.webassets-cache
|
||||
|
||||
# Scrapy stuff:
|
||||
.scrapy
|
||||
|
||||
# Sphinx documentation
|
||||
docs/_build/
|
||||
|
||||
# PyBuilder
|
||||
target/
|
||||
|
||||
# IPython Notebook
|
||||
.ipynb_checkpoints
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||||
|
||||
# pyenv
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||||
.python-version
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||||
|
||||
# celery beat schedule file
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||||
celerybeat-schedule
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|
||||
# dotenv
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.env
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||||
|
||||
# virtualenv
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||||
venv/
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ENV/
|
||||
|
||||
# Spyder project settings
|
||||
.spyderproject
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||||
|
||||
# Rope project settings
|
||||
.ropeproject
|
||||
|
|
@ -0,0 +1,201 @@
|
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Apache License
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@ -0,0 +1,45 @@
|
|||
OpenStack Swift middleware for serverless functions
|
||||
===================================================
|
||||
This guide assumes you have a working DevStack VM.
|
||||
In DevStack local.conf::
|
||||
|
||||
enable_service s-proxy s-object s-container s-account
|
||||
enable_plugin picasso git@github.com:openstack/picasso.git master
|
||||
|
||||
this will enable Swift and Picasso inside DevStack
|
||||
|
||||
Run the following commands::
|
||||
|
||||
$ git clone https://github.com/denismakogon/serverless-functions-middleware.git
|
||||
$ pushd serverless-functions-middleware && sudo python setup.py install; popd
|
||||
|
||||
Install latest Swift python client::
|
||||
|
||||
$ git clone https://github.com/openstack/python-swiftclient.git
|
||||
$ pushd python-swiftclient && sudo python setup.py install; popd
|
||||
|
||||
Modify Swift proxy conf by adding::
|
||||
|
||||
[filter:functions_middleware]
|
||||
use = egg:functions#functions_middleware
|
||||
|
||||
In **[pipeline:main]** section add **functions_middleware** to the list of other middleware in **pipeline** config option
|
||||
Restart Swift proxy service by::
|
||||
|
||||
screen -x
|
||||
restart s-proxy process
|
||||
|
||||
Create a function::
|
||||
|
||||
$ openstack fn apps create testapp
|
||||
$ openstack fn routes create testapp-1445cef51c68427da92621 /hello sync iron/hello --is-public
|
||||
$ swift post test_container
|
||||
$
|
||||
|
||||
When uploading a file to Swift, specify **X-FUNCTION-URL**.
|
||||
The value can be retrieved using expose-url command against desired function::
|
||||
|
||||
$ openstack fn routes expose-url testapp-1445cef51c68427da92621 /hello
|
||||
$ swift upload test_container file --header "X-FUNCTION-URL:$(openstack fn routes expose-url testapp-1445cef51c68427da92621 /hello)"
|
||||
|
||||
A function that is being used would be supplied with X-AUTH-URL, X-PROJECT-ID and all relevant data about container and a file that is being uploaded.
|
||||
|
|
@ -0,0 +1,89 @@
|
|||
# Licensed under the Apache License, Version 2.0 (the "License");
|
||||
# you may not use this file except in compliance with the License.
|
||||
# You may obtain a copy of the License at
|
||||
#
|
||||
# http://www.apache.org/licenses/LICENSE-2.0
|
||||
#
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
||||
# implied.
|
||||
# See the License for the specific language governing permissions and
|
||||
# limitations under the License.
|
||||
|
||||
import json
|
||||
|
||||
from swift.common.http import is_success
|
||||
from swift.common.swob import Request
|
||||
from swift.common.utils import split_path, get_logger
|
||||
|
||||
from eventlet import Timeout
|
||||
import six
|
||||
if six.PY3:
|
||||
from eventlet.green.urllib import request as urllib2
|
||||
else:
|
||||
from eventlet.green import urllib2
|
||||
|
||||
|
||||
class FunctionsWebhookMiddleware(object):
|
||||
|
||||
def __init__(self, app, conf):
|
||||
self.app = app
|
||||
self.logger = get_logger(conf, log_route='picasso_functions')
|
||||
|
||||
def __call__(self, env, start_response):
|
||||
req = Request(env)
|
||||
resp = req.get_response(self.app)
|
||||
self.logger.info("Picasso: available headers: {}".format(str(dict(req.headers))))
|
||||
try:
|
||||
if "X-Function-URL" in req.headers:
|
||||
version, account, container, obj = split_path(req.path_info, 4, 4, True)
|
||||
self.logger.info("Picasso version {}, account {}, container {}, object {}"
|
||||
.format(version, account, container, obj))
|
||||
if obj and is_success(resp.status_int) and req.method == 'PUT':
|
||||
webhook = req.headers.get("X-Function-URL")
|
||||
data = json.dumps({
|
||||
"x-auth-token": req.headers.get("X-Auth-Token"),
|
||||
"version": version,
|
||||
"account": account,
|
||||
"container": container,
|
||||
"object": obj,
|
||||
"project_id": req.headers.get("X-Project-Id"),
|
||||
})
|
||||
self.logger.info("Picasso data to send to a function {}"
|
||||
.format(str(data)))
|
||||
data_as_bytes = data.encode('utf-8')
|
||||
webhook_req = urllib2.Request(webhook, data=data_as_bytes)
|
||||
webhook_req.add_header('Content-Type',
|
||||
'application/json')
|
||||
webhook_req.add_header(
|
||||
'Content-Length', len(data_as_bytes))
|
||||
self.logger.info("Picasso data to send as bytes {}"
|
||||
.format(data_as_bytes))
|
||||
with Timeout(60):
|
||||
try:
|
||||
result = urllib2.urlopen(webhook_req).read()
|
||||
self.logger.info(
|
||||
"Picasso function worked fine. Result {}"
|
||||
.format(str(result)))
|
||||
except (Exception, Timeout) as ex:
|
||||
self.logger.error(
|
||||
'Picasso failed POST to webhook {}, '
|
||||
'error {}'.format(webhook, str(ex)))
|
||||
else:
|
||||
self.logger.info("Picasso skipping functions middleware "
|
||||
"due to absence of function URL")
|
||||
except ValueError:
|
||||
# not an object request
|
||||
pass
|
||||
|
||||
return self.app(env, start_response)
|
||||
|
||||
|
||||
def filter_factory(global_conf, **local_conf):
|
||||
conf = global_conf.copy()
|
||||
conf.update(local_conf)
|
||||
|
||||
def webhook_filter(app):
|
||||
return FunctionsWebhookMiddleware(app, conf)
|
||||
return webhook_filter
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
# The order of packages is significant, because pip processes them in the order
|
||||
# of appearance. Changing the order has an impact on the overall integration
|
||||
# process, which may cause wedges in the gate later.
|
||||
|
||||
pbr>=1.9
|
||||
setuptools>=17.1
|
||||
Babel>=1.3
|
||||
eventlet>=0.17.4 # MIT
|
||||
greenlet>=0.3.1
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
[metadata]
|
||||
name = functions
|
||||
summary = Middleware for OpenStack Swift based on Functions-as-a-Service
|
||||
description-file =
|
||||
README.rst
|
||||
author = Denis Makogon
|
||||
author-email = denis@iron.io
|
||||
home-page = http://www.openstack.org/
|
||||
classifier =
|
||||
Environment :: OpenStack
|
||||
Intended Audience :: Information Technology
|
||||
Intended Audience :: System Administrators
|
||||
License :: OSI Approved :: Apache Software License
|
||||
Operating System :: POSIX :: Linux
|
||||
Programming Language :: Python
|
||||
Programming Language :: Python :: 2
|
||||
Programming Language :: Python :: 2.7
|
||||
|
||||
[pbr]
|
||||
skip_authors = True
|
||||
skip_changelog = True
|
||||
|
||||
[entry_points]
|
||||
paste.filter_factory =
|
||||
functions_middleware = functions.middleware:filter_factory
|
||||
|
|
@ -0,0 +1,29 @@
|
|||
# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
|
||||
#
|
||||
# Licensed under the Apache License, Version 2.0 (the "License");
|
||||
# you may not use this file except in compliance with the License.
|
||||
# You may obtain a copy of the License at
|
||||
#
|
||||
# http://www.apache.org/licenses/LICENSE-2.0
|
||||
#
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
||||
# implied.
|
||||
# See the License for the specific language governing permissions and
|
||||
# limitations under the License.
|
||||
|
||||
# THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
|
||||
import setuptools
|
||||
|
||||
# In python < 2.7.4, a lazy loading of package `pbr` will break
|
||||
# setuptools if some other modules registered functions in `atexit`.
|
||||
# solution from: http://bugs.python.org/issue15881#msg170215
|
||||
try:
|
||||
import multiprocessing # noqa
|
||||
except ImportError:
|
||||
pass
|
||||
|
||||
setuptools.setup(
|
||||
setup_requires=['pbr>=1.9', 'setuptools>=17.1'],
|
||||
pbr=True)
|
||||
Loading…
Reference in New Issue