Mastering migrations

Transcript

1. Mastering Migrations
   From Monolith to Microservices with Golden Master Testing
   

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2. Mastering Migrations
   From Monolith to Microservices with Golden Master Testing
   

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3. Microservices
   

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4. Andriy Frankevych
   Software Engineer @ Docebo
   Looking for a better profile picture
   @alsoknownasdrew on the interwebs
   

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5. Part 1: Why Are
   We Doing This?
   - 1 product
   - 1 dev team
   - 1 system
   

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6. Part 1: Why Are
   We Doing This?
   - 2 products
   - 1 dev team
   - 1 system
   

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7. Part 1: Why Are
   We Doing This?
   - 3 products
   - 1 dev team
   - 1 system
   

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8. Part 1: Why Are
   We Doing This?
   - 3 products
   - 1 dev team
   - 1 system
   - 1 bottleneck
   

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9. Part 1: Why Are
   We Doing This?
   - 3 products
   - 3 dev teams
   - 1 system
   

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10. Part 1: Why Are
    We Doing This?
    - 3 products
    - 3 dev teams
    - 1 system
    

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11. Part 1: Why Are
    We Doing This?
    - 3 products
    - 3 dev teams
    - 1 system
    - 1 bottleneck
    

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12. Part 1: Why Are
    We Doing This?
    - 3 products
    - 3 dev teams
    - 3 systems
    

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13. Microservices:
    organizational
    solution
    

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14. Part 2: What
    Are We Doing?
    - Giant spaghetti script
    - No tests
    - No one knows how it works
    

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15. Part 2: What
    Are We Doing?
    Identify responsibilities
    

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16. Part 3: How Are
    We Doing This?
    Record Golden Master
    

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17. Part 3: How Are
    We Doing This?
    - Run the tests
    - Refactor
    - Run the tests
    

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18. Part 3: How Are
    We Doing This?
    - Use Adapters
    

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19. Abstract dependencies:
    you'll be glad you did
    

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20. Part 3: How Are
    We Doing This?
    - Use Adapters
    - Use Contract Testing
    

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21. Part 3: How Are
    We Doing This?
    - Use Adapters
    - Use Contract Testing
    - Throw away Golden master
    

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22. Golden Master:
    refactoring
    solution
    

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23. Part 4: What's
    next?
    - Use Contract Testing to
    migrate frontend
    

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24. Part 4: What's
    next?
    - Use Contract Testing to migrate
    frontend
    - Repeat for other services
    

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25. Thanks
    References:
    - Fred Brooks: The Mythical Man-Month
    - Eric Evans: Domain Driven Design
    - Eberhard Wolff: Microservices
    - Michael Feathers: Working Effectively with Legacy Code
    - Contract testing: stoplight.io | pact.io
    - Slides: https://speakerdeck.com/alsoknownasdrew/mastering-migrations
    

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