Overview

broadview-collector is a service capable of receiving and publishing BroadView data received from a network device that is running Broadcom's BroadView agent. It is built on top of broadview-lib. broadview-collector is designed to support multiple metrics-gathering infrastructures via a plugin architecture.

Publisher Plugins

broadview-collector is designed to accept plugins that are capable of publishing BroadView data received by the collector to metric-collecting services such as OpenStack Monasca. These plugins are in the form of Python classes. These classes inherit from a base class that defines the interface the collector will invoke when data is received from the BroadView agent.

A serializer takes BroadView data and converts it into a playload that is suitable for a given publisher plugin.

Data coming into the collector from a BroadView agent is passed to a list of handlers. Each handler is designed to convert the payload that was received by the agent into an object form (currently, only BST data is supported, but handlers for additional BroadView components will be developed). This object form is canonical in the sense that it is independent of any publisher plugin.

Once the payload is in an object form, a list of publisher plugins is iterated. Each publisher is given a chance to serialize the data (it does this by instantiating a serializer object, described below). If the serialization is successful, then the publisher plugin will write the data to the service that it directly supports.

Creating Publisher Plugins

Publisher plugins are simply python source files that exist in the directory broadview_collector/plugins. A single class inheriting BroadViewPublisherBase is implemented in this file. This base class defines a single method, publish(), which accepts a data object from the collector. The plugin must provide an override to this method.

Addition directories can be configured to hold plugins. These directories, if configured, will be searched for plugins at startup in addition to broadview_collector/plugins. See the documentation on the searchpath config variable in /etc/broadviewcollector.conf, below, for details and an example.

The name of the class implemented by the plugin must be BroadViewPlublisher.

The set of plugins used at runtime is defined in configuration, and only configured plugins will be invoked by the collector. Simply placing a python source file in the plugins directory will not cause it to be recognized by broadview-collector. Further details on configuration is provided below.

The job of the publish() method is to (optionally) call a serializer to convert the data into payload (e.g., JSON) understandable to the service that the publisher plugin targets, and to publish the data using whatever API that the target service provides for doing so.

Two example publishers are provided:

• monascapublisher: targets the OpenStack Monasca Python metric publishing API
• logpublisher: appends data to a configured text file

For a complete list of publishers, look in the broadview_collector/plugins directory.

To use a publisher, it must be added to the comma-separated list of publishers listed in /etc/broadviewcollector.conf, and the collector must be restarted.

Serializers

Serializers are python source files that are located in the directory broadview_collector/serializers. The broadview-collector is not directly aware of these serializers, nor are they required to be configured in order to be used. They are aggregated in the serializers directory simply to make them available for whatever plugins wish to use (or not use) them.

A serializer should inherit from BroadViewSerializerBase. The intent is to promote a uniform API among the serializers. If the target of a publisher plugin requires a new serializer be written, consider creating a serializer that inherits BroadViewSerializerBase and locating it in the serializers directory so that it might be of use to developers of other publisher plugins.

The monasca and log publishers both use the BSTToMonasca serializer located in serializers/bst_to_monasca.py to illustrate this concept of reuse. If you don't like the format of the messages that are written by an existing publisher, you can write your own serializer (if one of the existing ones does not fit your needs) and hack the publisher to import and use it instead.

Handlers

A handler is designed to take traffic incoming to the collector, parse it, and return an object (of some type) that represents the parsed data. The returned object (or list of objects perhaps) is then sent to each registered publisher.

Handlers map to BroadView components. Handlers, like publisher plugins and serializers, inherit a base class, in this case BroadViewHandlerBase. This class, and the handlers themselves, are located in broadview_collector/handlers.

Handlers directly correspond to BroadView components that are supported in broadview-lib. See https://github.com/openstack/broadview-lib for more information on the BroadView components supported by broadview-lib.

To use a handler, it must be listed in the comma-separated list of handlers in /etc/broadviewcollector.conf, and it must be located in the handlers directory.

The name of the handler class must be BroadViewHandler.

See broadview_collector/handlers/bsthandler.py for an example. Handlers have a tight coupling to parsers provided in broadview-lib, and normally they will be added (or updated) as parsers are added (or updated) in the broadview-lib project.

Installing BroadView Collector

Basic Installation and Configuration

Installation requires the following steps:

1. Install OpenStack, including the services to which you intend to publish data to. We discuss below Monasca-based publishing in more detail. Steps for other services are currently not supported, but will be similar in scope. Your OpenStack vendor/supplier may have installation instructions specific to products that they support, contact your supplier for more details.

2. Install broadview-lib:

   $ git clone https://github.com/openstack/broadview-lib.git $ cd broadview-lib $ python setup.py install

3. Install broadview-collector

   $ git clone https://github.com/openstack/broadview-collector.git $ cd broadview-collector $ python setup.py install

4. Copy the file broadview_collector/config/broadviewcollector.conf to /etc

   $ sudo cp broadview_collector/config/broadviewcollector.conf /etc

5. Edit /etc/broadviewcollector.conf as needed

   $ sudo vi /etc/broadviewcollector.conf

6. Copy broadview collector application to /usr/local/bin:

   $ sudo cp broadview_collector/bin/bvcollect.py /usr/local/bin $ sudo chmod 755 /usr/local/bin/bvcollect.py

7. Start the collector (assuming /usr/local/bin is in your PATH):

   $ bvcollect.py &

In addition, you must configure the broadview agent. This involves two steps: editing the device configuration so that the agent knows the IP address and port where the collector is listening, and configuring the agent to publish desired statistics.

To configure the agent, refer to instructions provided by your vendor. The IP address and port of the collector is in the [network] section of /etc/broadviewcollector.conf, for example:

[network]

ip_address: 10.14.244.143
port: 8082

Once the agent is up and running on the networking device, you can use bv-bstctl.py (included in broadview-lib) to configure BST.

Detailed Installation: Monasca API

This section details how to set up and configure a devstack-based install of broadview-collector that publishes to Monasca API.

The following assumes you are on a host running Ubuntu 14.04. Later versions of Ubuntu may work, but as of this writing, are not tested or supported.

1. Follow the directions for bringing up Monasca with devstack which are located here: https://github.com/openstack/monasca-api/blob/master/devstack/README.txt

If you already have OpenStack and Monasca working, then you probably can skip the above step.

2. Follow the instructions above in Basic Installation and Configuration

3. Add monascapublisher to the list of publishers in /etc/broadviewcollector.conf

4. Add a section, [monasca], to /etc/broadviewcollector.conf, as in the following:

   [monasca]

   username: mini-mon password: password project_name: mini-mon auth_url: http://10.14.245.57:35357/v3 endpoint: http://10.14.245.57:8070/v2.0 api_version: 2_0

A /etc/broadviewcollector.conf known to work with monasca-api devstack looks like the following (you'll need to change the IP addresses to match the one of your host system):

[plugins]

# comma separated list of plugin modules

publishers: monascapublisher, logpublisher

# handlers map to broadview components, e.g., bst, packet trace

handlers: bsthandler

[logging]

# this section sets prefs for the logging handler.

file: /tmp/broadview-bstlogging.log

[network]

ip_address: 10.14.245.57
port: 8082

[monasca]

username: mini-mon
password: password
project_name: mini-mon
auth_url: http://10.14.245.57:35357/v3
endpoint: http://10.14.245.57:8070/v2.0
api_version: 2_0

Configuration File Syntax

This section describes the syntax of the configuration file /etc/broadviewcollector.conf.

[DEFAULT]

The [DEFAULT] section defines logging parameters. Refer to the example in config/broadviewcollector.conf for details. Logs in the default configuration are written to the file /var/log/broadview-collector/broadview-collector.log

[plugins]

The [plugins] section supports the following settings related to publisher plugins:

publishers

publishers is a list of comma-separated python modules that are located in the plugins directory, or the plugins searchpath (see searchpath, below).

Example:

publishers: monascapublisher, logpublisher, syslogpublisher

searchpath

searchpath is a comma-separated list of prefixes that are preprended to the publisher names when the collector attempts to load plugins.

A search order is defined by the order of items in this comma-separated list. The "plugins" directory associated with broadview-collector is searched last. Each plugin is searched for in each directory, in order. If the plugin is successfully loaded using an entry in the search path, the search ceases. Otherwise, the search will continue in the next directory defined in the search path.

Note: the python searchpath (e.g., PYTHONPATH) is not modified by the value of this variable.

Items in the searchpath must be for the form a.b.c

Example:

searchpath: tmp, home.broadview.plugins

[misc]

handlers

The handlers setting is a list of handlers of broadview payload sent by an agent. This setting generally is defined to reflect the capabilities of broadview-lib. If you are only interested in a subset of the functions that BroadView supports, reducing the list of handlers to contain only those BroadView components you are interested in can increase the performance of the collector, and reduce the burden on your metric collection/analytics pipeline. Items in this setting are comma-separated.

Example:

handlers: bsthandler

[logging]

This section supports the logpublisher publisher plugin.

file

This setting is the absolute path of the logfile written by the publisher plugin

Example:

file: /tmp/broadview-bstlogging.log

[network]

This section contains the networking configuration of the collector

ip_address

The IP address (IPV4) that the collector will listen for connections on

Example:

ip_address: 10.14.245.57

port

The port that the collector will listen for connections on

Example:

port: 8082

[monasca]

This section supports the monascapublisher publisher plugin. These settings are passed by the monasca publisher as arguments to the monasca python client constructor. An example of how a python app creates a client object:

from monascaclient import client
import monascaclient.exc as exc

api_version = '2_0'
endpoint = 'http://192.168.10.4:8080/v2.0'

auth_kwargs = {'username': 'mini-mon',
               'password': 'password',
               'project_name': 'mini-mon',
               'auth_url': 'http://192.168.10.5:35357/v3/'}
monasca_client = client.Client(api_version, endpoint, **auth_kwargs)

The settings in this section directory correspond (in name and purpose) with the arguments pass to the Client constructor above.

username

The username to authenticate

Example:

username: mini-mon

password

The password associated with the user being authenticated

Example:

password: password

project_name

The project name for which the above user is authenticated

Example:

project_name: mini-mon

auth_url

The URL of the authentication service (keystone)

example:

auth_url: http://10.14.245.57:35357/v3

endpoint

The URL that defines where monasca API is running

Example:

endpoint: http://10.14.245.57:8070/v2.0

api_version

The version of the Monasca API

Example:

api_version: 2_0

DevStack Support

Devstack support is provided by the files located in the directory broadview_controller/devstack. Devstack is probably the easiest way to experiment with BroadView Collector.

Refer to the README.txt file in broadview_controller/devstack for details on how to setup a devstack-based environment for executing BroadView Collector.

License

(C) Copyright Broadcom Corporation 2016

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.