ARI and AGI, a powerful combination
- 1. ARI and AGI A powerful combination Jöran Vinzens @vinzens81 linkedin.com/in/jvinzens/
- 2. What?
- 3. What? It is not a manual how to use Asterisk!
- 4. What? Story of how we think we could be ready for the future.
- 5. What are AMI, AGI and ARI
- 6. What are AMI, AGI and ARI Interfaces to control the Asterisk
- 7. What are AMI, AGI and ARI AMI - Asterisk Manager Interface ● Event based ● Modify or create Channels ● No access to Dialplan Functions or Apps ● Asynchronous does not block https://wiki.asterisk.org/wiki/pages/viewpage.action?pageId=4817239
- 8. What are AMI, AGI and ARI AGI - Asterisk Gateway Interface ● Execute a script or call a socket ● Only on dialplan operation ● Can execute dialplan applications and functions ● Easy to use ● Synchronous and blocks channel https://wiki.asterisk.org/wiki/pages/viewpage.action?pageId=32375589
- 10. What are AMI, AGI and ARI ARI - Asterisk REST Interface ● Event based ● HTTP socket and REST interface ● Control of low level resources in Asterisk ● Asynchronous, might block ARI = Dialplan app Stasis https://wiki.asterisk.org/wiki/pages/viewpage.action?pageId=29395573
- 11. What are AMI, AGI and ARI https://wiki.asterisk.org/wiki/pages/viewpage.action?pageId=29395573
- 12. What are AMI, AGI and ARI When to use what? AMI - Channel manipulation during a call AGI - Extended dialplan Handling ARI - Write your own dialplan application https://wiki.asterisk.org/wiki/display/AST/AMI+v2+Specification#AMIv2Specification-ProtocolOverview
- 13. Goal
- 14. Goal Everyone should be able to write PBX features
- 15. Goal SIP, Asterisk Dialplan, AGI, AMI, ARI, etc. are complex
- 17. What are we doing with the Asterisk
- 18. What are we doing with the Asterisk? Call routing In call features Accounting/billing Announcements IVR, Conference etc…. Customer API
- 19. How are we using the Asterisk
- 20. How are we using the Asterisk? Lot of Dialplan Several FastAGI executions Some AGI Scripts AMI call manipulation
- 21. How are we using the Asterisk? Lot of Dialplan Several FastAGI executions Some AGI Scripts AMI call manipulation Every feature is distributed allover the place
- 22. Problems with the current setup
- 23. Problems with the current Setup Everything saved in Channel Vars Several local Dial() Multiple Calls of FastAGI and AGI and manager Interconnection
- 24. Problems with the current Setup Loss of state and variables Features interfere with each other
- 25. Problems with the current Setup Loss of state and variables Features interfere with each other Setup has been grown beyond repair
- 27. Possible solution Respect system boundaries Stick to standards Use components for what they are designed for
- 28. Possible solution AGI ● Use as testable dialplan generic to any features ARI ● Control of resources during the call specific to each feature
- 29. Possible solution AGI ● Call Setup and Teardown ARI ● The only instance controlling a feature during the entire call
- 30. Possible solution AGI ● Check the feature and call correct Stasis App ● Determine outgoing carrier, write CDR, ... ARI ● All feature relevant handlings
- 31. How would it look like
- 32. How would it look like?
- 33. How would it look like?
- 34. How would it look like? App dispatcher ARI App Out dispatcher App dispatcher ARI App SIP SIPlocal
- 35. How would it look like? App Dial -> App Stasis
- 36. How would it look like? App Dial -> App Stasis Small-sized Stasis apps
- 37. How would it look like? Use ARI Proxy Move routing logic away from Asterisk
- 38. How would it look like? Use ARI Proxy Move routing logic away from Asterisk Kafka -> https://github.com/retel-io/ari-proxy NATS / Rabbit MQ -> https://github.com/CyCoreSystems/ari-proxy
- 39. How would it look like?
- 40. How would it look like? Low level API, ARI High level API
- 41. How would it look like? Asterisk ARI WS ARI REST Kafka Low level Call control High level Feature control Low level API, ARI High level API ARI Proxy
- 42. Benefits
- 43. Benefits ● Less untested dialplan ● Easy to replace features ● No developer interactions with Asterisk Dialplan ● Generic Asterisk dialplan ● Low level ARI API enables any feature ● Decouple telephony feature from Asterisk
- 44. Benefits AGI -> control generic Features ARI -> enables features and isolates from each other
- 45. Earlier
- 46. Earlier Astricon 2018: How ARI-Proxy works youtube.com/watch?v=vMCyuItMYxE CommCon 2019: Migrate old to new youtube.com/watch?v=Y9R0mg9eC9c
- 47. Questions? Thanks for listening! Jöran Vinzens @vinzens81 linkedin.com/in/jvinzens/