- What's Software Deployment - A Minimal Python Web Application - Trouble Shoot - Interface between Web Server and Application - Standardization/Automation/Monitoring/Availability

1. A Byte of
Software Deployment
@dylanninin

2. What is Software Deployment ?

3. Software Development Life Cycle

4. All the Activities
that Make a Software System
Available for Use
Definition
It refers to:

5. Deployment Activities
• Requirements — The Missing Piece of Software Development
• Planning — An Objective of Each and Every Activity
• Testing — Do Not Ship Bugs At All
• Designing — Overall Pictures of Both High/Low-Level
• Deployment — What Does this Deployment Mean

6. How to Deploy Software

7. A Minimum Python Web Application

8. An Overview of Realword Web Application

9. It’s so complicated … …

10. MVP In Deployment

12. Just Before You Start
• Test your code
- We Do Not Ship Bugs At All
- Confirm That It Is Deployable

13. Let’s start
• Get a Server
• Apply a Public IP
- Try AWS or Linode/DigitalOcean …
- Login via SSH/VNC …
- Apply an IP
- Attatch the IP to Your Server
- Initialize Security Rules …

14. Preparing
• Install Required Packages
- Install Project Based Libraries
- Install Redis/Mongodb/ElasticSearch/…
- Edit YAML/TOML/JSON Configuration
- Maintain Environment Aware of Production/Staging/Test
• Setup Dependencies
• Build Code/Config into Release
- Make them Daemon

15. Run Stand-alone
• Run the App
- export PYTHON_ENV=production
- python run.py —port=8888
- http :8888/the/actual/url

16. Web Server
• DNS
- Choose a Domain Name
- Add an A Record in DNS Console
• Nginx
- Listen on 80/443
- Proxy Pass Requests to Your App
- http https://your_domain_name/the/actual/url
- Get the Public IP of Your Server

17. It is simple!

18. The Well-Known Three

19. Supervisor: Progress Manager
• Convenience
• Accuracy
• Centralised

20. Nginx - Web Server
• Simplicity
• High Concurrency
• Extensibility

21. Sentry - Logging
• Log as Event Stream

22. Trouble Shooting

23. A Minimum Python Web Application

24. There may be problems anywhere

25. With Outlined Tech Stack

26. How to Trouble Shooting

27. The So-Called “Interface”

28. A Minimum Python Web Application

29. What does “interface” mean?

30. a Protocol Describes
How the Web Server Talks with an Application
Definition
It refers to:

31. CGI

32. mod_python

33. FastCGI/SCGI

34. WSGI

35. Integrated Web Server

36. Proxy Pass

37. Proxy Pass

38. There Are Some Other Topics

39. Standardisation
Explicitly declare and isolate dependencies
• Virtual Environment for Isolation
• requirements.txt for Dependencies

40. Standardisation
Store config in the environment
• YAML/TOML/JSON
• Dev/Test/Staging/Production

41. Standardisation
Treat backing services as attached resources
• Configurable
• Detached/Attached

42. Automation

43. Monitoring
Aware of Your Application
• Console
• Utilities
• Services

44. Availability
Max Availability
• Max Mean Time between Failures
• Min Mean Time to Recover
• >= 99.9%

45. Q & A

46. Reference
• Comparison of web server software
• http://www.fullstackpython.com/deployment.html
• http://www.fullstackpython.com/wsgi-servers.html
• https://docs.python.org/3.5/howto/webservers.html
• https://github.com/fouber/blog/issues/6
• https://ruby-china.org/topics/12686
• http://supervisord.org/
• http://nginx.org/
• https://jenkins.io/
• https://newrelic.com/
• http://12factor.net/
• https://github.com/alex/what-happens-when