TOWARDS A RESPONSIVE BUSINESSThe Developer Way

@nigelfds

github.com/nigelfds

@venetiabird

github.com/venetiabird

Understanding the problems

“We make a change in one place and somewhere, something else breaks”

“It feels like it takes a long time to complete what should be a simple thing”

“Feels like all we have done are patches, hacks and short term tactical fixes to meet deadlines”

Really?

Part of any problem is: people & process

We’re going to focus on the technical parts

www.laputan.org

1. Legacy Systems2. Kitchen Sink Applications3. Monolithic Applications4. Complexity

We’ll talk about dealing with 4 things:

…and what we learnt along the way.

1. Legacy Systems

Strangler Pattern

Legacy systems grow arms and legs…

…because the world needs to continue

2. Kitchen Sink Applications

Kitchen Sink

Different speeds of evolution

Factoring systems by Value Stream

You aren’t going to get it right at first go

Using WebAPI and Areas to build services within a service

3. Monolithic Applications

Eliminating batch processes is hard

4. Complexity

“I do believe that complexity is the enemy. Until we better understand complexity, our chances of building better IT systems is limited. The first thing we must understand about complexity is that not all complexity is equal. And the complexity on which most people focus is probably the least complex complexity of all.”

http://simplearchitectures.blogspot.com/2009/03/cancer-of-complexity.html

Roger Sessions

Complexity

Accidental complexity vs Planned complexity

Dealing with artifacts…

Managing Pipelines

Make it Visible!

Drilling down...

to package our apps

What’s inside the nuget package?

Puppet manifests

Environment Configurations as JSON

Install Script in Powershell

Zip’ed up applicationVersion

0.12.4

Version 0.12.4Proget to manage the packages for the environments

Dev Feed

Test Feed

Staging Feed

Production Feed

Push button deployment

1. Hey Bamboo, deploy v0.1.7 to staging

3. Hey Choclatey, install version 10

4. Proget Staging Feed, give me, v0.1.7

6. Unpacks the box and runs the install script

2. Powershell over winRM

5. Here you go!

Staging Server

Checks for the correct environment

Uses the environment configuration with puppet to configure the environment

IIS configuration,Folder permissions etc

What’s interesting!!?

Packages shipped with ability configure their environment

Testing deployment scripts…

…with Canary packages

Guarantees at every every stage in pipeline

Unit Testing

Integration Testing

Systems Testing

The test pyramid.

Status Checks

5 Months +scope

9 weeks +scope

4 weeks +scope

Thank you.