Continuous Delivery su progetti Java: cosa abbiamo imparato facendoci del male
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Transcript of Continuous Delivery su progetti Java: cosa abbiamo imparato facendoci del male
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Continuous Delivery in JavaCose che abbiamo imparato facendoci del male
Codemotion Milano ‘15
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@pdincau
Here We Are
@pierodibello
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Continuous Delivery?
What is
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“Continuous Delivery is a software development discipline where you build software in such a way that the software can be released to
production at any time. ”Martin Fowler*
* martinfowler.com/bliki/ContinuousDelivery.html
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“Continuous Delivery is nothing more than reducing the stress you get when you deliver business value to the customer ”
My Team*
* Come and ask!
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n t Continuous Delivery...
What is
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Continuous Integration
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Continuous Deployment
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“Safety” Deploy rules
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Technically Speaking
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Deploy any specific working version to
production with confidence
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3 ways
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Rodeo Style
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No tests
Manual deploy
Snowflake environments
Non predictable outcome
Few or very little collaboration
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Rodeo Style
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By the book
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Fast Feedback
Done is released
Shared responsibility
Everything is automated
Repeatable and reliable process
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Start small and iterate
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Once upon a time...
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We did know...
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Previous deployment process was painful
Database continuously change
Different environments
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Itera
tion
n.1
No Automation
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Environment replica on AWS
Manual build
Manual DB migrations
Deploy with scp to remote JBoss
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It was our own choice...
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...but we felt like this
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No automation at all
When was our last deploy?
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A taste of AutomationIte
ratio
n n.
2
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Set up a basic Jenkins installation
Test and build triggered on push
DB migration using Liquibase
Task to deploy on AWS
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This worked for a while
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Errors in MyBatis DB mappers
Wrong/Missing wirings
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Meanwhile...
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Yay! Environments are ready!
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Deploy EverywhereIte
ratio
n n.
3
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New Jenkins job to run integration tests
Track slowest tests
First official deploy an all environments
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…with different DB drivers !#$?!
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Duplication
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Incorrect use of mvn profiles
N-builds for N-environments
Long build and deploy time
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Single ArtefactIte
ratio
n n.
4
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Got rid of configurations using JBoss
*Unique* artefact for all environments
Deploy version X.Y.Z from Nexus
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We started getting fast
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But QA were not so happy
Branches, branches everywhere!
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Make them happyIte
ratio
n n.
5
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An environment for QA
Tags over branches
Track deployed version
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Devs love QAs
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Acceptance tests
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Explained values and
motivations to Product Owner
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Self-service deploy
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Remove Candidate Clean Up
Clean Up
Build it...
Migrate !
Database
Fetch Unit Tests Build
Build
Integration Test !
Integration
Deploy Publish UAT
QA and Publish
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Frontend Angular !
Web
...and deliver it
Deploy ESB !
ESB
Deploy staging !
Deploy Staging
Deploy API Deploy Core
Backend
Migrate !
Database
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Things we are experimenting
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Parallelization
Environments Provisioning
Jenkins under git
Squash migrations to snapshot
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What we would do differently...
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Pipeline with “placeholders”
Extract configurations asap
Explain at the beginning the values behind
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Things we will keep doing...
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Build the pipeline iteratively
Share pipeline responsibility
Use the tool that best fit your needs
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Recommended reading
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Take a look at these
Real-World Strategies for Continuous Delivery
with Maven and Jenkins
https://www.youtube.com/watch?v=McTZtyb9M38
Visualizations of Continuous Delivery
http://continuousdelivery.com/2014/02/visualizations-of-continuous-delivery/
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That’s all!
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@pdincau@pierodibello
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https://creativecommons.org/licenses/by-nc-sa/3.0/
Thanks!