Getting a System to Production and keeping it there Eoin Woods, - - PowerPoint PPT Presentation

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Getting a System to Production and keeping it there Eoin Woods, - - PowerPoint PPT Presentation

Oct 08, 2022 281 likes •742 views

Getting a System to Production and keeping it there Eoin Woods, Endava Content Introducing Production Systems What Goes Wrong in Production? Solutions for Production Systems Conclusions 3 Production Systems 4 What is a production

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Getting a System to Production
 … and keeping it there Eoin Woods, Endava

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Content

Introducing Production Systems What Goes Wrong in Production? Solutions for Production Systems Conclusions

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Production Systems

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What is a production system?

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Any system
 being used
 for real work

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Why is Productionisation Hard?

No one teaches you about production

who do you talk to? what do they want? what is the definition of “done” ?

Production is difficult for developers

hard to access, interrogate, debug, change, ...

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A new cast of characters

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Developers

Development

Users

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A new cast of characters

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Production

Users Developers Auditors Operations Acquirers Infrastructure Business
 Management

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Production is constrained

Highly controlled Content is all valuable Change can be difficult

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Production is unpredictable

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Production is highly visible!

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You don’t own production

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What goes wrong?

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Performance surprises

Interactive load Batch time surprises System abusers!

“all transactions this year”, “average since 1967”, ...

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Environment bombshells

Constraints and contention Unexpected behaviour Integration points

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Failures happen

Software defects Platform failures Environment failures

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Security tangles

Security is simple in Development Much more complex in Production!

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Finding Solutions

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Key requirements for production

Functionally correct

does what the business process requires

Stability

behaves predictably in all situations

Capacity

can process the workload required (at all times)

Security

limits access to those who are authorised to have it

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Solution Framework

Correctness Stability Capacity Security Design Principles Technology Processes

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Solution Framework

Correctness Stability Capacity Security Design Principles Technology Processes

Simplicity

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Solution Framework

Correctness Stability Capacity Security Design Principles Technology Processes

Simplicity Resource Governor

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Solution Framework

Correctness Stability Capacity Security Design Principles Technology Processes

Simplicity Resource Governor Threat Modelling

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General Principles

One Team Automate Measure and Improve (feedback loops) Good Enough over Perfection

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Timeless principles … today led by CD and DevOps

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Example: Achieving Stability

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Stability - design principles

Fail quickly

fail fast, timeouts

Isolate problems

flow control, circuit breakers, bulkheads, asynchronous integration

Ensure steady state operation

housekeeping, predictable resource allocation, governors, throttling

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Stability - technology solutions

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Stability - technology solutions

Fail fast

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Stability - technology solutions

Fail fast Bulkhead

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Stability - technology solutions

Timeouts Fail fast Bulkhead

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Stability - technology solutions

Timeouts Fail fast Bulkhead Governor

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Stability - technology solutions

Timeouts Circuit Breaker Fail fast Bulkhead Governor

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Stability - technology solutions

Timeouts Circuit Breaker Fail fast Bulkhead Governor Housekeeping

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Example - Circuit Breaker

Clear Checking Tripped

err_returned timeout err_returned &&
 err_count > 10 err_returned

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Stability - process principles

Repeatability

defined processes, practice scenarios, prelive environments

Automation

automate the routine, automate the difficult allow the human back in the loop on demand

Transparency

logging, monitoring, alerts, trends

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Stability - process automation

Logging 
 & Metrics Monitoring Automation

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Summary

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Production is just different

it’s not yours and you need to respect that

Production is demanding

Correctness Stability Capacity Security

Summary

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Summary (ii)

Solutions for each requirement by area

principles technologies processes

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Summary (iii)

Production requirements and principles go back to the age of the mainframe CD and DevOps the latest incarnation welcome attention from developers new tech enabling new possibilities breaking down silos to make it happen

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Books

Software Systems Architecture

Second Edition

NICK ROZANSKI • EOIN WOODS

Working with Stakeholders Using Viewpoints and Perspectives

Second Edition

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Thanks !

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Acknowledgements

http://www.icons-land.com http://www.alamy.com/ http://www.42u.com