Help I've created a serverless monolith - Microsoft Reactor Toronto

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@MarcDuiker

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@MarcDuiker 2 Marc Duiker Developer Advocate

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@MarcDuiker 9 https://en.wikipedia.org/wiki/Monolithic_application “In software engineering, a monolithic application describes a software application that is designed without modularity.”

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@MarcDuiker 10 https://en.wikipedia.org/wiki/Modularity “…modularity is the degree to which a system's components may be separated and recombined, often with the benefit of flexibility and variety in use.”

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@MarcDuiker App Server DB Server

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@MarcDuiker 12 Function App Function App Queue Database

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@MarcDuiker 13 Function App Function App Queue Database

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@MarcDuiker 14 Function App Function App Queue Database

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@MarcDuiker 19 https://martinfowler.com/articles/agileStory.html “We eventually agreed on "agile" as we felt that captured the adaptiveness and response to change which we felt was so important to our approach…”

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@MarcDuiker Task on backlog Work completed

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@MarcDuiker Task on backlog Work started Work completed

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@MarcDuiker 28 https://www.atlassian.com/incident-management/kpis/common-metrics

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@MarcDuiker 29 https://www.atlassian.com/incident-management/kpis/common-metrics

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@MarcDuiker https://www.atlassian.com/incident-management/kpis/common-metrics

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@MarcDuiker 33 Caused by the nature of the (business) problem. Can’t be easily reduced. https://en.wikipedia.org/wiki/Programming_complexity

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@MarcDuiker 34 Caused by the nature of the (business) problem. Can’t be easily reduced. Caused by decisions we make related to architecture, frameworks, packages, code style etc. Can be reduced. https://en.wikipedia.org/wiki/Programming_complexity

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@MarcDuiker 35 https://en.wikipedia.org/wiki/Programming_complexity Caused by decisions we make related to architecture, frameworks, packages, code style etc. Can be reduced. Caused by the nature of the (business) problem. Can’t be easily reduced.

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@MarcDuiker 48 Domain Bounded Context Bounded Context Bounded Context Bounded Context https://thedomaindrivendesign.io/bounded-context/

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@MarcDuiker 49 Ecommerce Product Catalog Inventory Billing Shopping Basket https://thedomaindrivendesign.io/bounded-context/

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@MarcDuiker “Ubiquitous language identifies the terms and concepts within a bounded context that are unambiguous and agreed upon by all stakeholders.” https://thedomaindrivendesign.io/what-is-strategic-design

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@MarcDuiker 51 Banking Context Ecommerce Context https://thedomaindrivendesign.io/what-is-strategic-design

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@MarcDuiker “Resilience is the ability to provide and maintain an acceptable level of service in the face of faults and challenges to normal operation.” https://en.wikipedia.org/wiki/Resilience_(network)

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@MarcDuiker

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@MarcDuiker https://docs.microsoft.com/en-us/azure/architecture/patterns/

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@MarcDuiker https://docs.microsoft.com/en-us/azure/architecture/patterns/

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@MarcDuiker https://docs.microsoft.com/en-us/azure/architecture/patterns/

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@MarcDuiker 61 Function App Function App Queue Database

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@MarcDuiker 63 Increase number of (virtual) machines Increase CPU / memory of one machine

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@MarcDuiker 67 Fan out Fan out No fan out No fan out

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@MarcDuiker 68 Fan out Fan out No fan out No fan out https://docs.microsoft.com/en-us/azure/azure-functions/functions-scale#scale Use dedicated resource to its fullest

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@MarcDuiker 69 Fan out Fan out No fan out No fan out https://docs.microsoft.com/en-us/azure/azure-functions/functions-scale#scale Use higher tier / sku Use regular tier / sku

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@MarcDuiker 70 Ask yourself these questions before adding any code:

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@MarcDuiker 71 Ask yourself these questions before adding any code: - Do *I* need to write this?

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@MarcDuiker 72 Ask yourself these questions before adding any code: - Do *I* need to write this? - Is this a good fit with the rest of the app?

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@MarcDuiker 73 Ask yourself these questions before adding any code: - Do *I* need to write this? - Is this a good fit with the rest of the app? - What is the impact regarding resilience/scalability of the app?

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@MarcDuiker 74 @marcduiker http://bit.ly/marc-serverless