Download - The Continuous Delivery process
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Continuous Deliveryan overview
@joebew42
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Delivery
We want to bring valueto our customers
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How we deliver value?
Putting working softwarein production
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How we put “working” software in production
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How we put “working” software in production● E.g. Package and deploy in production through a manual procedure
○ What are possible risks here■ Increased risk of release■ Long time releases■ Poor documentation■ Human error■ Stress■ Not automatic / Not repeatable■ Black friday, for real!■ Cowboy style
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Let’s go with Automation
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Let’s go with Automation● How?
○ E.g. lay down a script that does the manual work for you● What we earn?
○ Auto documentation○ Repeatable○ Everything is in one authoritative place○ Fast and easy deployments
● What are the risks?○ Long time releases (we take weeks or months for production deployment)○ Someone has to manual trigger it○ Lose visibility into what we released in production
■ E.g. versions and history
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Let’s go Continuous
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Let’s go Continuous● How?
○ Triggers script on every code changes● What we earn?
○ Shared code base○ Release more frequently○ Automatic deployment○ Visibility on what is released
● What are the risks?○ Introduce bugs in production is easier○ Less confidence about what works and what does not
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Let’s go with Integration
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Let’s go with Integration● How?
○ Test the behaviour of the software in a production-like environment
● What we earn?○ Catch bugs before you get into production○ More confidence about what works and what does not
● What are the risks?○ Feedback loops can take a long time
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Let’s go with Integration (part II)
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Let’s go with Integration (part II)● How?
○ Write tests that can be easily launched on the local machine
● What we earn?○ Catch bugs before you get into production○ More confidence about what works and what does not○ Instant feedback upon code changes○ Local code changes do not affect shared code base○ Each release is production-ready
● What is still missing here?○ A better release management
■ e.g. we don’t want to release on Friday afternoon■ e.g. feature is ready but the monitoring is not■ e.g. we want to collect metrics before get into production■ other ...
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Let’s go with Delivery● How?
○ Understand how to deliver business value in a sustainable yet efficient way
● What we earn?○ Visualize and observe the entire process of delivery○ Whole team is involved○ Separate the build from the deployment process
● Can we go better?○ The process change over time in order to meet the new team needs○ Gather feedbacks and ask why & how the process should be improved:
■ e.g. Retrospectives and showcases■ e.g. The 5 Whys technique can be helpful to find the root cause of a problem■ e.g. Maybe someone external have to get into the team
○ Rotate the people○ Each team has its own process of Continuous Delivery
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Some hints for your team● The delivery process is one of your responsibilities● The process you use to deliver value is a model that changes over time in
order to adapt to requirements changes○ Inspect and adapt○ Gather feedback○ Invite the right people○ Fail fast, fail often … Safely
● Try to learn more about your business● Try to be autonomous
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Some numbers
From “The Phoenix Project”
COMPANY DEPLOYFREQUENCY
DEPLOYLEAD TIME
RELIABILITY CUSTOMERFEEDBACK
AMAZON 23.000/day minutes high high
GOOGLE 5.500/day minutes high high
NETFLIX 500/day minutes high high
FACEBOOK 1/day hours high high
TWITTER 3/week hours high high
TYPICAL ENTERPRISE
once every9 months
months or more low/medium low/medium
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Going further ...By book: Continuous DeliveryJez Humble and David Farley
By web: https://continuousdelivery.com/Is maintained by Jez Humble. This website is a good place to keep you up to date about CD topics.
By book: The Phoenix ProjectGene Kim, Kevin Behr and George Spafford
Is a novel about IT, DevOps and helping your business win