Let's deploy on fridays

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   Let’s deploy on fridays I’m not slacking off, I’m deploying.

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    Build instance • Poll, waiting for a build • Process

    a build • Build a container • Release the container
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    Can you see it? Change is coming

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    Build instance • Poll, waiting for a build • Process

    a build • Build a container • Release the container
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    Build instance • Poll, waiting for a build • Build

    a container • Release the container • Process a build
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    Build instance • Poll, waiting for a build • Process

    a build • Build a container • Release the container
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    Upgrade API version Upgrade fetching posts Upgrade fetching users Use

    uuids
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    Team Communication

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    Upgrade API version Upgrade fetching posts Upgrade fetching users Use

    uuids
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    git revert

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    DEPLOY!!!

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    Canary deploys

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    Request Server A Server B Router

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    Request Server A Server B Router 50% 50%

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    Request Server A Server B Router 50% 50%

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    Request Server A Server B Router 33% 33% Server C

    33%
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    github.com/dmathieu/sidekiq-canary

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    Refactoring and benchmarking

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    Customer-facing changes

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    Granularity

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    Multitask

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    Gradual rollouts

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    Request 99% 1% Old code path New code path Server

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    def partial_roll?(id) id % 100 < 1 end if partial_roll?(user_id)

    call_new_method else call_old_method end
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    Refactoring and benchmarking

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    Customer-facing changes

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    Feature flags

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    Going further

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    bit.ly/ deploy-friday

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    Thank you Damien MATHIEU

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    Thank you Questions? damien@heroku.com dmathieu