the continuous delivery zone craig berntson chief software gardener mojo software worx

THE CONTINUOUS

DELIVERY ZONE

Craig BerntsonChief Software GardenerMojo Software Worx

Ego stuff

Conference speaker INETA Community Speaker ComponentOne

Speaker Bureau Author Microsoft C# MVP

Have you heard these?

It works on my machine When will you be done The database changed Stop shipping! We found a bug! Give me what you have so we can test Customer won’t accept – lots of bugs Code duplication

Waterfall

Customer Input

Business Analysis

Development

Manual Testing

Release

Software Gardening

Agile methodologies Continuous Delivery Developer skills

Refactoring Design Patterns Test-Driven Development SOLID OOD Software Craftsmanship Dependency Injection

Agile methodologies

Individuals and interactions

Working software

Customer collaboration

Responding to change

Continuous Delivery

Continuous

Integration

Automated

Acceptance Testing

Automated Capacity

Testing

Manual Testing

Automated

Deployment

Software Delivery Pipeline Fail Fast (Learn Early) Delivery Team =

Development + QA + Operations DevOps

Why Continuous Delivery

Reduce risk Increase quality Enable better project visibility Establish greater product confidence Reduce repetitive/manual processes

Continuous Integration

Also called Commit Stage

CI Defined

Continuous Integration is a software development practice where members of a team integrate their work frequently, usually each person integrates at least daily - leading to multiple integrations per day. Each integration is verified by an automated build (including test) to detect integration errors as quickly as possible. Many teams find that this approach leads to significantly reduced integration problems and allows a team to develop cohesive software more rapidly.

– Martin Fowlerhttp://www.martinfowler.com/articles/continuousIntegration.html

CI Defined

CI is the embodiment of tactics that gives us, as software developers, the ability to make changes in our code, knowing that if we break software, we’ll receive immediate feedback...[It is] the centerpiece of software development, as it ensures the health of software through running a build with every change.

– Paul Duvall Continuous Integration

CI Defined

An automated process that builds, tests, analyzes and deploys an application to help ensure it functions correctly, follows best practices, and is deployable. This process runs with each source code change and provides immediate feedback to the development team.

- Continuous Integration in .NET

Definitions tell us

Integrate frequently

Automated build & test

Centerpiece of development

Ensures health

Automated build, test, analyze, deploy

Functions correctly Follows best

practices Runs with each

code change Immediate

feedback

Manual process

Code

Build

Unit Test

Refactor

Check out Check in

CI process

Integrate

Build

Unit Test

Report

Get latest Check in

Continuous Integration Process

Version ControlSystem

Developers

Feedback Mechanism

Build Script

CI Server

Stake Holders

Version Control System (VCS)

Check in often, several times per day Do not branch – Always work on trunk Everything goes into VCS Tools: TFS, Subversion, Git, Mercurial

Project Organization

Each developer: Uses the same folder structure Uses the same tools Uses the same 3rd party components,

placed in project folders Check everything out from VCS and build

Continuous Integration Servers

Manage the CI process Check out source Compile Run tests Give feedback

Tools: TFS, Jenkins, Team City, Cruise Control

Build management

Handles actual build from source Gets called from CI Server Tools: MSBuild, Ant, Nant, Rake, PSake

Testing

Testing

Unit tests Integration tests

Unit/Integration testing

Test After Development Test Driven Development Unit Test Frameworks

JUnit, NUnit, MSTest, xUnit, rbUnit

Artifacts

Potential release candidate Build & test results Components for next steps or

subsequent builds Tools: Maven, Npanday , Octopus

Feedback

Build reports Test results Web, system tray, text, twitter, sound

large monitors, lights,Ambient Orb

Build Radiator

Build Radiator

Multiple projects Multiple statistics Can be whiteboard, colored Post-It notes,

web page

Build Radiator Examples

Michael Brunton-Spall – guardian.co.uk

Build Radiator Examples

Phil Collins

Build Radiator Examples

Phil Collins

Continuous Integration Demo

Developer process CI server configuration Feedback mechanism Build radiator

Best Practices

Commit code frequently Don’t commit broken code Fix broken builds immediately Write automated developer tests All tests and inspections must pass Run private builds (each developer runs

tests on their own code) Avoid getting broken code (don’t check

out broken code)

Continuous Delivery

Continuous

Integration

Automated

Acceptance

Testing

Automated

Capacity Testing

Manual Testing

Automated

Deployment

Automated Testing Processes

Artifact Storage

Test SystemCI Server

Feedback Mechanism

Automated Acceptance Testing

Validates software from the user perspective

Does the functionality work the way the customer expects?

Given … When … Then … Test system should resemble production

system Tools: FitNesse, Cucumber, Jbehave,

Concordion, Twist

Automated Acceptance Testing

Loose coupling UI Design Patterns MVVM, MVC, MVP Separation of concerns

Automated Capacity Testing

Non-functional requirements Scalability, Longevity, Throughput, Load Tools: Jmeter, Marathon, Bench, Ants

What happened to QA staff?

Role changes Write automated test scripts Analyze test results Manual testing

Manual Testing Process

Artifact Storage

Feedback Mechanism

Test System

QA staff

Manual Testing

Exploratory, Usability, Showcases Look and feel Worst-case

Automated Deployment

Process should be identical to testing deployment

Sets up systems and configuration Don’t forget about rollback (and test this

too) Tools: Puppet, Octopus, System Center

Testing

Integration

Functional

Acceptance

System

Stability

Scalability

Performance

Load

Unit

Code Analysis

Test coverage

Dependency

Refactoring

Code reviewStatic analysis

Database

Schema

Stored proc

Test database

Unit testing

Deployment

Install script

QA

Production

Extending Continuous Deployment

Review

Continuous Integration

Automated Acceptance

Testing

Automated Capacity Testing

Manual Testing

Automated

Deployment

Questions

Email: craig@mojosoftwareworx.com Twitter: @craigber www.speakerrate.com/craigber