Adopting Test Driven Development in Operations

Experience report on adopting test driven development in operations. Originally presented at Agile2014, Washington DC.

Transcript

1. Strategies for adopting TDD in
   Operations
   @RanjibDey
   Based on the Experience Report: http://goo.gl/GIwn1v
   

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2. Agenda
   @RanjibDey
   1.Introduction
   2.TDD in brief
   3.Why TDD is compelling in Operations
   4.Strategies
   5.Key learnings
   6.Q/A
   

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3. Introduction
   @RanjibDey
   

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4. TDD in brief
   @RanjibDey
   1.Unit test first
   2.Part of XP
   3.Has evolved a lot
   

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5. Why TDD in Operations?
   @RanjibDey
   Operations integrates services
   

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6. Why TDD in Operations?
   @RanjibDey
   Tactical workloads are difficult to predict
   

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7. Why TDD in Operations?
   @RanjibDey
   Legacy components
   

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8. Strategies
   @RanjibDey
   1.Layered tests
   2.Code reviews
   3.Extend CI to operations
   4.Continuous learning
   

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9. Layered testing strategy
   @RanjibDey
   1.Unit tests for fast feedback
   2.Functional tests for feature validation
   3.Integration tests for end to end testing
   

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10. Unit tests
    @RanjibDey
    directory "/var/go/.ssh" do
    owner 'go'
    group 'go'
    mode 0700
    end
    it 'creates the go user ssh directory' do
    expect(runner).to create_directory('/var/go/.ssh').with(
    owner: 'go',
    group: 'go',
    mode: 0700
    )
    end
    

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11. Unit tests
    @RanjibDey
    pagerduty/infra[master]$rake spec
    Finished in 1 minute 15.16 seconds
    5629 examples, 0 failures, 4 pending
    

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12. Functional tests
    @RanjibDey
    it 'creates a standalone zk node' do
    ct = helper.container('pd-zk')
    out = ct.execute do
    h= 'localhost'
    p = 2181
    telnet = Net::Telnet::new('Host' => h, 'Port' => p)
    state = telnet.cmd('String' => 'ruok')
    telnet.close
    state
    end
    expect(out).to eq('imok')
    end
    

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13. Integration tests
    @RanjibDey
    

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14. Code reviews
    @RanjibDey
    

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15. Continuous Integration
    @RanjibDey
    Extend CI in operations
    

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16. Continuous Integration
    @RanjibDey
    Make courtesy artifacts
    

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17. Continuous Learning
    @RanjibDey
    1.Invest on learning resources
    2.Conferences
    3.Engage in OpenSource projects
    

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18. Continuous Learning
    @RanjibDey
    Invest on learning resources
    

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19. Continuous Learning
    @RanjibDey
    Conferences, meetups
    

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20. Continuous Learning
    @RanjibDey
    Contribute and learn from OpenSource
    projects
    

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21. Key Learnings
    @RanjibDey
    1.Be patient
    2.Capture patterns, test patterns
    3.Embrace diversity
    

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22. Key Learnings
    @RanjibDey
    Be patient
    

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23. Key Learnings
    @RanjibDey
    Capture patterns
    

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24. Key Learnings
    @RanjibDey
    Capture patterns
    

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25. Key Learnings
    @RanjibDey
    Embrace diversity, ease deduction
    

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26. @RanjibDey
    Thank You
    Based on the Experience Report: http://goo.gl/GIwn1v
    

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