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![NGS: A NATS based global communication network
telnet connect.ngs.global 4222
Trying 34.241.195.68...
Connected to euwest1.aws.ngs.global.
Escape character is '^]'.
INFO
{"server_id":"NBZCGYFTHLCMZC5FWCJXQHVK7VUXSDRYEALBY6GFYCGEBZHGJLWHZR7J",
"version":"2.0.0-RC5","nonce":"kBpF7HCm6rb_TW0",
"cluster":"aws-euwest1","connect_urls":["34.241.195.68:4222","34.243.238.95:4222","34.249.1
87.230:4222"]}](https://image.slidesharecdn.com/introductiontonatsmessagingwithpython3-190613053909/75/SF-Python-Meetup-Introduction-to-NATS-Messaging-with-Python3-81-2048.jpg)
![NGS: A NATS based global communication network
telnet connect.ngs.global 4222
Trying 34.241.195.68...
Connected to euwest1.aws.ngs.global.
Escape character is '^]'.
INFO
{"server_id":"NBZCGYFTHLCMZC5FWCJXQHVK7VUXSDRYEALBY6GFYCGEBZHGJLWHZR7J",
"version":"2.0.0-RC5","nonce":"kBpF7HCm6rb_TW0",
"cluster":"aws-euwest1","connect_urls":["34.241.195.68:4222","34.243.238.95:4222","34.249.1
87.230:4222"]}](https://image.slidesharecdn.com/introductiontonatsmessagingwithpython3-190613053909/75/SF-Python-Meetup-Introduction-to-NATS-Messaging-with-Python3-82-2048.jpg)
![NGS: A NATS based global communication network
telnet connect.ngs.global 4222
Trying 34.241.195.68...
Connected to euwest1.aws.ngs.global.
Escape character is '^]'.
INFO
{"server_id":"NBZCGYFTHLCMZC5FWCJXQHVK7VUXSDRYEALBY6GFYCGEBZHGJLWHZR7J",
"version":"2.0.0-RC5","nonce":"kBpF7HCm6rb_TW0",
"cluster":"aws-euwest1","connect_urls":["34.241.195.68:4222","34.243.238.95:4222","34.249.1
87.230:4222"]}](https://crownmelresort.com/image.slidesharecdn.com/introductiontonatsmessagingwithpython3-190613053909/75/SF-Python-Meetup-Introduction-to-NATS-Messaging-with-Python3-81-2048.jpg)
![NGS: A NATS based global communication network
telnet connect.ngs.global 4222
Trying 34.241.195.68...
Connected to euwest1.aws.ngs.global.
Escape character is '^]'.
INFO
{"server_id":"NBZCGYFTHLCMZC5FWCJXQHVK7VUXSDRYEALBY6GFYCGEBZHGJLWHZR7J",
"version":"2.0.0-RC5","nonce":"kBpF7HCm6rb_TW0",
"cluster":"aws-euwest1","connect_urls":["34.241.195.68:4222","34.243.238.95:4222","34.249.1
87.230:4222"]}](https://crownmelresort.com/image.slidesharecdn.com/introductiontonatsmessagingwithpython3-190613053909/75/SF-Python-Meetup-Introduction-to-NATS-Messaging-with-Python3-82-2048.jpg)
Uploaded bywallyqs
SF Python Meetup - Introduction to NATS Messaging with Python3
This document is an introduction to NATS, a cloud-native messaging system, presented by Waldemar Quevedo at a Python meetup in June 2019. It discusses the features and updates of NATS v2, including its messaging patterns, server architecture, and how to get started using NATS with Python. Key highlights include the new clustering protocols, enhanced security measures, and the performance of the Python clients.
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SF Python Meetup - Introduction to NATS Messaging with Python3
- 1. Introduction to NATSwith Python3 SF Python Meetup / June 2019 Waldemar Quevedo / @wallyqs +
- 2. About me ● WaldemarQuevedo / @wallyqs ● Software Engineer at ● NATS core maintainer ● Using NATS based systems since 2012 ● Author of Practical NATS (Apress, 2018)
- 3. The original book aboutNATS Available at: https://www.apress.com/us/book/9781484235690
- 4. NATS v2 isout! 🎉 Released on Monday (June 10th, 2019) Biggest release of the project since it started.
- 5.
- 6. Agenda ● Introduction tothe NATS project ● Getting started with NATS using Python3 ● What is new in NATS v2
- 7.
- 8. NATS is asimple, production proven, cloud-native messaging system.
- 9. CNCF Landscape Joined CNCFas an incubation project in 2018 https://landscape.cncf.io
- 10. CNCF Landscape Joined CNCFas an incubation project in 2018 https://landscape.cncf.io
- 11.
- 12. Growing Community: NATSEnd Users
- 13. About NATS ● Createdby Derek Collison in 2011 for CloudFoundry ● DNA: Performance, simplicity, security, and availability ● TCP/IP based with a very simple plain text protocol | PUB | SUB | UNSUB | CONNECT | INFO | MSG | -ERR | +OK | PING | PONG |
- 14. Delivery modes At leastonce (Streaming) A message will always be delivered, but in certain cases may be delivered more than once https://github.com/nats-io/nats-streaming-server At most once (Core) No guarantee of delivery - messages can be lost - applications must detect and handle lost messages https://github.com/nats-io/nats-server
- 15. The NATS Servers Atleast once (Streaming) At most once (Core) https://github.com/nats-io/nats-server https://github.com/nats-io/nats-streaming-server
- 16. NATS Python Clients Atleast once (Streaming) At most once (Core) https://github.com/nats-io/nats.py https://github.com/nats-io/stan.py
- 17.
- 18. The NATS Server(aka. core NATS) For NATS v2, release main project repo name has changed Before: https://github.com/nats-io/gnatsd Now: https://github.com/nats-io/nats-server ⚠
- 19. The NATS Server(aka. core NATS) For NATS v2, release main project repo name has changed Before: https://github.com/nats-io/gnatsd Now: https://github.com/nats-io/nats-server ⚠
- 20. The NATS Server(aka. core NATS) ● Written in Go ● Extremely high performance ● TLS support ● Authorization and Authentication ● Full-mesh one hop clustering for HA ● Auto discovery via gossip
- 21. Full mesh NATSCluster NATS Client NATS NATSNATS NATS Client
- 22. Full mesh NATSCluster NATS Client NATS NATSNATS NATS Client
- 23. Full mesh NATSCluster NATS Client NATS NATSNATS NATS Client
- 24.
- 25.
- 26. NATS Streaming (aka.STAN) ● Supports persistence of messages / ‘Message replay’ ● Protocol based on NATS Request/Reply ● Multiple store options: a. File based with Raft based replicated log for clustering b. Backed by a relational database (mysql / postgres)
- 27. NATS Streaming (aka.STAN) NATS Streaming Client NATS NATSNATS NATS Streaming Server ‘cluster-A’ NATS Streaming Server ‘cluster-A’ NATS Streaming Server ‘cluster-A’
- 28. Getting started withNATS in Python
- 29. Running the NATSServer Binary releases available at: https://github.com/nats-io/nats-server/releases Official Docker image: docker run nats For Kubernetes support check: https://github.com/nats-io/nats-operator
- 30. The Python NATSClients The clients repositories have also changed: Before: https://github.com/nats-io/asyncio-nats https://github.com/nats-io/asyncio-nats-streaming Now: https://github.com/nats-io/nats.py https://github.com/nats-io/stan.py ⚠
- 31. The Python NATSClients ● The official NATS Python3 client is asyncio based: https://github.com/nats-io/nats.py ● Python2 client also available and is based in Tornado: https://github.com/nats-io/nats.py2 ● The STAN client (stan.py) uses nats.py: https://github.com/nats-io/stan.py Note: There is only Python3 support for STAN/NATS Streaming
- 32. The Python NATSClients ● The official NATS Python3 client is asyncio based: pip install asyncio-nats-client ● Python2 client also available and is based in Tornado: pip install nats-client ● The STAN client (stan.py) uses nats.py: pip install asyncio-nats-streaming Note: There is only Python3 support for STAN/NATS Streaming
- 33.
- 34.
- 35. Core of NATS: 3Simple Patterns
- 36. Messaging Patterns ✓ Publish/Subscribe(1:N) ✓ Request/Reply (1:1) ✓ Load Balanced Queue Subscribers (1:1)
- 37. Messaging Patterns ✓ Publish/Subscribe(Streams) ✓ Request/Reply (Services) ✓ Load Balanced Queue Subscribers (Streams or Services)
- 38.
- 39.
- 40.
- 41.
- 42.
- 43.
- 44.
- 45.
- 46.
- 47.
- 48.
- 49. Request/Response (1:1) PUB foo NATS Client NATS Client NATS Client NATS Client SUBfoo First message would be lowest latency response
- 50. Request/Response (1:N) PUB foo NATS Client NATS Client NATS Client NATS Client SUBfoo Scatter & Gather multiple replies
- 51.
- 52.
- 53. Load Balanced Queues SUBfoo workers PUB foo NATS Client NATS Client NATS Client NATS ClientRandomly distributed
- 54. Load Balanced Queues SUBfoo workers PUB foo NATS Client NATS Client NATS Client NATS ClientRandomly distributed
- 55. Load Balanced Queues SUBfoo workers PUB foo NATS Client NATS Client NATS Client NATS ClientRandomly distributed
- 56. Load Balanced Queues SUBfoo workers PUB foo NATS Client NATS Client NATS Client NATS ClientRandomly distributed
- 57. Load Balanced Queues SUBfoo workers PUB foo NATS Client NATS Client NATS Client NATS ClientRandomly distributed
- 58.
- 59.
- 60. Wildcards SUB foo workers PUBfoo NATS Client NATS Client NATS Client NATS ClientNATS Client SUB >
- 61. Wildcards SUB foo workers PUBfoo NATS Client NATS Client NATS Client NATS ClientNATS Client SUB >
- 62. Wildcards SUB foo workers PUBfoo.bar NATS Client NATS Client NATS Client NATS ClientNATS Client SUB >
- 63. Wildcards SUB foo workers PUBfoo.bar NATS Client NATS Client NATS Client NATS ClientNATS Client SUB >
- 64. Wildcards SUB foo.bar workers PUBfoo.bar NATS Client NATS Client NATS Client NATS ClientNATS Client SUB > NATS Client SUB foo.*
- 65. Wildcards PUB foo.bar NATS Client NATS Client NATS Client NATS ClientNATS Client SUB >NATS Client SUB foo.* SUB foo.bar workers
- 66. Wildcards PUB foo.bar NATS Client NATS Client NATS Client NATS ClientNATS Client SUB >NATS Client SUB foo.* SUB foo.bar workers
- 67. Tip: Do notassume the audience of a message! PUB foo.bar NATS Client NATS Client NATS Client NATS ClientNATS Client SUB > NATS Client SUB foo.* SUB foo.bar workers
- 68. Messages Replay withNATS Streaming
- 69. Messages Replay withNATS Streaming
- 70. Messages Replay withNATS Streaming
- 71. The NATS v2Release
- 72. What’s in NATSv2 Expands the security and project capabilities of the server to become a core component used to build a global communication network. https://synadia.com/ngs
- 73. What’s in NATSv2 ● Gateways, Super clusters & Leafnodes ● New clustering protocol ● Accounts isolation ○ Like containers for messaging ● NKEYS (ed25519 based keys) ● Decentralized authorization with JWTs ● TLS certs SAN based auth Docs! https://nats-io.github.io/docs/
- 74. What’s in NATSv2 ● Gateways, Super clusters & Leafnodes ● New clustering protocol ● Accounts isolation ○ Like containers for messaging ● NKEYS (ed25519 based keys) ● Decentralized authorization with JWTs ● TLS certs SAN based auth Docs! https://nats-io.github.io/docs/
- 75.
- 76.
- 77.
- 78.
- 79.
- 80.
- 81. NGS: A NATSbased global communication network telnet connect.ngs.global 4222 Trying 34.241.195.68... Connected to euwest1.aws.ngs.global. Escape character is '^]'. INFO {"server_id":"NBZCGYFTHLCMZC5FWCJXQHVK7VUXSDRYEALBY6GFYCGEBZHGJLWHZR7J", "version":"2.0.0-RC5","nonce":"kBpF7HCm6rb_TW0", "cluster":"aws-euwest1","connect_urls":["34.241.195.68:4222","34.243.238.95:4222","34.249.1 87.230:4222"]}
- 82. NGS: A NATSbased global communication network telnet connect.ngs.global 4222 Trying 34.241.195.68... Connected to euwest1.aws.ngs.global. Escape character is '^]'. INFO {"server_id":"NBZCGYFTHLCMZC5FWCJXQHVK7VUXSDRYEALBY6GFYCGEBZHGJLWHZR7J", "version":"2.0.0-RC5","nonce":"kBpF7HCm6rb_TW0", "cluster":"aws-euwest1","connect_urls":["34.241.195.68:4222","34.243.238.95:4222","34.249.1 87.230:4222"]}
- 83.
- 84.
- 85. NATS Super Cluster+ Leafnodes
- 86. NATS Super Cluster+ Leafnodes
- 87. NATS Super Cluster+ Leafnodes
- 88.
- 89.