asterisk as a media application server - · pdf filecreative innovation – customer...
TRANSCRIPT
![Page 1: Asterisk as a Media Application Server - · PDF fileCreative Innovation – Customer Satisfaction – Continual Quality Improvement 2 Goal: Can we make Asterisk a generic media application](https://reader031.vdocuments.mx/reader031/viewer/2022020203/5a70080e7f8b9a93538b95f9/html5/thumbnails/1.jpg)
Asterisk as a Media Application Server
Matt Jordan@mattcjordan
Director of Technology, Digium
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2Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Goal:
Can we make Asterisk a generic media
application server?
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3Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Scalability
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4Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployments
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5Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployments
Asterisk front-ended with Kamailio– Kamailio acts as Registrar, provides Location– Asterisk provides media services
Use Traditional Asterisk Dialplan
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6Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployments
Asterisk front-ended with Kamailio– Kamailio acts as Registrar, provides Location– Asterisk provides media services
Use Traditional Asterisk Dialplan
Option 1: Each Asterisk server the same
![Page 7: Asterisk as a Media Application Server - · PDF fileCreative Innovation – Customer Satisfaction – Continual Quality Improvement 2 Goal: Can we make Asterisk a generic media application](https://reader031.vdocuments.mx/reader031/viewer/2022020203/5a70080e7f8b9a93538b95f9/html5/thumbnails/7.jpg)
7Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployment: Option 1
Kamailio 1
Kamailio 2
Alice
Bob
Asterisk PBX
Asterisk PBX
Asterisk PBX
![Page 8: Asterisk as a Media Application Server - · PDF fileCreative Innovation – Customer Satisfaction – Continual Quality Improvement 2 Goal: Can we make Asterisk a generic media application](https://reader031.vdocuments.mx/reader031/viewer/2022020203/5a70080e7f8b9a93538b95f9/html5/thumbnails/8.jpg)
8Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployment: Option 1
Kamailio 1
Kamailio 2
Alice
Bob
Asterisk PBX
Asterisk PBX
Asterisk PBX
● Kamailio acts as Registrar
● Round Robin routing
● Multi-tenant● Asterisk
systems share configuration
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9Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployment: Option 1
Kamailio 1
Kamailio 2
Alice
Bob
Asterisk PBX
Asterisk PBX
Asterisk PBX
● Kamailio acts as Registrar
● Round Robin routing
● Multi-tenant● Asterisk
systems share configuration
![Page 10: Asterisk as a Media Application Server - · PDF fileCreative Innovation – Customer Satisfaction – Continual Quality Improvement 2 Goal: Can we make Asterisk a generic media application](https://reader031.vdocuments.mx/reader031/viewer/2022020203/5a70080e7f8b9a93538b95f9/html5/thumbnails/10.jpg)
10Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Problems with Option 1
Sharing Configuration– Not easily scaled– All systems must know all information– Requires careful dialplan construction (func_odbc)
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11Creative Innovation – Customer Satisfaction – Continual Quality Improvement
[customer_one]
exten => 1000,1,NoOp() same => n,ConfBridge(1000,c_one_profile) same => n,Hangup()
[customer_two]
exten => 1000,1,NoOp() same => n,ConfBridge(1000,c_two_profile) same => n,Hangup()
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12Creative Innovation – Customer Satisfaction – Continual Quality Improvement
[customer]
exten => 1000,1,NoOp() same => n,ConfBridge(1000,${ODBC_CONF_PROF(${CALLERID(num)})}) same => n,Hangup()
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13Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployment: Option 1
Kamailio 1
Kamailio 2
Alice
Bob
Asterisk PBX
Asterisk PBX
Asterisk PBX
Alice Calls 1000 (Conference)
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14Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployment: Option 1
Kamailio 1
Kamailio 2
Alice
Bob
Asterisk PBX
Asterisk PBX
Asterisk PBX
Bob Calls 1000 (Conference)
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15Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployment: Option 1
Kamailio 1
Kamailio 2
Alice
Bob
Asterisk PBX
Asterisk PBX
Asterisk PBX
:-(
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16Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Problems with Option 1
Sharing Configuration– Not easily scaled– All systems must know all information– Requires careful dialplan construction (func_odbc)
func_odbc: Still doesn't scale well!– Can defer customer logic to external system– Cannot easily defer routing/application logic
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17Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployments
Asterisk front-ended with Kamailio– Kamailio acts as Registrar, provides Location– Asterisk provides media services
Use Traditional Asterisk Dialplan
Option 1: Each Asterisk server the same
![Page 18: Asterisk as a Media Application Server - · PDF fileCreative Innovation – Customer Satisfaction – Continual Quality Improvement 2 Goal: Can we make Asterisk a generic media application](https://reader031.vdocuments.mx/reader031/viewer/2022020203/5a70080e7f8b9a93538b95f9/html5/thumbnails/18.jpg)
18Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployments
Asterisk front-ended with Kamailio– Kamailio acts as Registrar, provides Location– Asterisk provides media services
Use Traditional Asterisk Dialplan
Option 1: Each Asterisk server the same
![Page 19: Asterisk as a Media Application Server - · PDF fileCreative Innovation – Customer Satisfaction – Continual Quality Improvement 2 Goal: Can we make Asterisk a generic media application](https://reader031.vdocuments.mx/reader031/viewer/2022020203/5a70080e7f8b9a93538b95f9/html5/thumbnails/19.jpg)
19Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployments
Asterisk front-ended with Kamailio– Kamailio acts as Registrar, provides Location– Asterisk provides media services
Use Traditional Asterisk Dialplan
Option 1: Each Asterisk server the same
Option 2: Special purpose Asterisk servers
![Page 20: Asterisk as a Media Application Server - · PDF fileCreative Innovation – Customer Satisfaction – Continual Quality Improvement 2 Goal: Can we make Asterisk a generic media application](https://reader031.vdocuments.mx/reader031/viewer/2022020203/5a70080e7f8b9a93538b95f9/html5/thumbnails/20.jpg)
20Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployment: Option 2
Kamailio 1
Kamailio 2
Alice
Bob
Asterisk PBX
Asterisk Conferencing
Asterisk PBX
● Kamailio acts as Registrar
● Route based on functional purpose (with round robin amongst those)
● Multi-tenant● Asterisk
systems share configuration
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21Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployment: Option 2
Kamailio 1
Kamailio 2
Alice
Bob
Asterisk PBX
Asterisk Conferencing
Asterisk PBX
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22Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployment: Option 2
Kamailio 1
Kamailio 2
Alice
Bob
Asterisk PBX
Asterisk Conferencing
Asterisk PBX
But what if Ineed anotherConferencingServer?
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23Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployment: Option 2
Kamailio 1
Kamailio 2
Alice
Bob
Asterisk PBX
Asterisk Conferencing
Asterisk PBX
:-(
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24Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Traditional Deployments
Asterisk front-ended with Kamailio– Kamailio acts as Registrar, provides Location– Asterisk provides media services
Use Traditional Asterisk Dialplan
Option 1: Each Asterisk server the same
Option 2: Special purpose Asterisk servers
![Page 25: Asterisk as a Media Application Server - · PDF fileCreative Innovation – Customer Satisfaction – Continual Quality Improvement 2 Goal: Can we make Asterisk a generic media application](https://reader031.vdocuments.mx/reader031/viewer/2022020203/5a70080e7f8b9a93538b95f9/html5/thumbnails/25.jpg)
25Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Problems with Option 1 and Option 2
Sharing Configuration– Not easily scaled– All systems must know all information– Requires careful dialplan construction (func_odbc)
func_odbc: Still doesn't scale well!– Can defer customer logic to external system– Cannot easily defer application logic
Functional systems only partially mitigate the problem– Application logic still affects routing decisions– Impacts how easy we can scale
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26Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Problems with Tradition
Optimal routing should not require application logic: Not Kamailio's job
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27Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Problems with Tradition
Optimal routing should not require application logic: Not Kamailio's job
Application Logic impacts routing
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28Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Problems with Tradition
Optimal routing should not require application logic: Not Kamailio's job
Application Logic impacts routing
Ideal situation– Every instance of Asterisk is generic– Kamailio just routes based on performance
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29Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Goal:
Can we make Asterisk a generic media
application server?
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30Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Remove the application logic from Asterisk
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31Creative Innovation – Customer Satisfaction – Continual Quality Improvement
ARI: An API for building custom communications
applications
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32Creative Innovation – Customer Satisfaction – Continual Quality Improvement
ARI: A Super Quick Overview
A REST(ful) API– Exposes the raw Asterisk primitives as resources
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33Creative Innovation – Customer Satisfaction – Continual Quality Improvement
ARI: A Super Quick Overview
A REST(ful) API– Exposes the raw Asterisk primitives as resourcesPOST /channels/12345/answerDELETE /bridges/awesome_bridgePUT /deviceStates/my_dev/state=BUSY
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34Creative Innovation – Customer Satisfaction – Continual Quality Improvement
ARI: A Super Quick Overview
A REST(ful) API– Exposes the raw Asterisk primitives as resourcesPOST /channels/12345/answerDELETE /bridges/awesome_bridgePUT /deviceStates/my_dev/state=BUSY
JSON Events over WS{ event: 'ChannelHangup', channel: { 'id': '12345', 'name': 'PJSIP/alice'
A tiny bit of dialplanexten => _XXXX,1,Stasis(yourapp)
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35Creative Innovation – Customer Satisfaction – Continual Quality Improvement
ARI: A Super Quick Overview
AsteriskDialplan Execution
ARIExternal Execution
Stasis dialplan app
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36Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Single Slide Conference Bridge
import ari
client = ari.connect('http://localhost:8088', 'ari_user', 's3cr3t')
conf_bridge = client.bridges.create( type='mixing,dtmf_events', bridgeId='awesome_conf')
def stasis_start_cb(channels, ev): channel = channels.get('channel') channel.answer() conf_bridge.play(media='sound:beep') conf_bridge.addChannel(channel=channel.id)
client.on_channel_event('StasisStart', stasis_start_cb)
client.run(apps='awesome_conference')
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37Creative Innovation – Customer Satisfaction – Continual Quality Improvement
ARI: An API for building custom communications
applications
(THAT'S THE DIALPLAN)
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38Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Nontraditional Deployment
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39Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Step 1: Remove the Dialplan*
* Conspiracy Theorists Rejoice
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40Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Getting a little extreme
[default]
exten => _X.,1,NoOp() same => n,Stasis(EVERYTHING) same => n,Hangup()
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41Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Step 2: Use a Message Bus
Approach
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42Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Getting a little extreme
def get_app_by_exten(exten): “””This is terrible, but demos the concept”””
if exten == '1000': return exec_conference else: return default_app_exec
def stasis_start_cb(channel, ev): exten = ev.get('exten') app = get_app_by_exten(exten) app(channel)
client.on_channel_event('StasisStart', stasis_start_cb)
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43Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Getting a bit more extreme
Kamailio 1
Kamailio 2
Alice
Bob
Asterisk 1
Asterisk 2
Asterisk n
SIP ARI
App Server
App Server
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44Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Getting a bit more extreme
Kamailio 1
Kamailio 2
Alice
Bob
Asterisk 1
Asterisk 2
Asterisk n
SIP ARI
App Server
App Server
Treat as Scalable Microservices
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45Creative Innovation – Customer Satisfaction – Continual Quality Improvement
A philosophical taxonomy
Keep things as simple as possible, but no simpler
Kamailio: manage SIP
Asterisk: manage media
Application logic: your choice
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46Creative Innovation – Customer Satisfaction – Continual Quality Improvement
Questions
?