A Developer's Survival Guide for the Microservice Era

THE MICROSERVICE ERA A Developer's Survival Guide for

Sebastian Heuer Developer Advocate Freelance Software Engineer

https://github.com/phar-io/phive

HOW TO MANAGE YOUR PROJECT'S TOOLCHAIN IN 2016

http://vier.fm

“Through our work we have come to prioritize: Business value
over technical strategy Strategic goals over project-specific benefits Intrinsic interoperability over custom integration Shared services over specific-purpose implementations Flexibility over optimization Evolutionary refinement over pursuit of initial perfection The SOA Manifesto  http://www.soa-manifesto.org

Product Service Cart   Service Checkout Service Core ESB communication
initiation

HTTP HTTP HTTP Product Service Cart   Service Checkout Service
Core communication initiation

HTTP HTTP HTTP HTTP Pricing Service Cart   Service Checkout
Service Core Product Text Service communication initiation

HTTP HTTP HTTP Product Service Cart   Service Checkout Service
Core

HTTP HTTP HTTP HTTP HTTP Product Service Cart   Service
Checkout Service Pricing Service Product Text Service ?

MICROSERVICES ARE AUTONOMOUS YOUR TEAM SHOULD BE TOO

Product Service Cart   Service Checkout Service

https://labs.spotify.com/2014/03/27/spotify-engineering-culture-part-1/

“LOOSELY COUPLED TIGHTLY ALIGNED

A REAL WORLD USE CASE

HOW TO GET RID OF A ZOMBIE DON’T

"one hundred fifty-seven quinvigintillion, seven hundred eighty-six quattuorvigintillion, six hundred
fifty-seven trevigintillion, seven hundred forty-seven duovigintillion, three hundred forty unvigintillion, one hundred eighty-six vigintillion, (…) nine hundred forty-five quintillion, eight hundred twenty-eight quadrillion, two hundred seventy trillion, eighty billion, …"

FURY Frontend Key-Value Storage getCategoryPage(341); "<html><head>…</head><body>…</body></html>"

FURY Frontend Key-Value Storage ["SBU06HE","TEOD3HE","ANW04HD"] Search search("{'category':341, 'filters':{...}}"); getTiles(["SBU06HE","TEOD3HE","ANW04HD"]); ["<div
class="category-item">…</div>", …]

Webserver Key-Value Storage Search FURY Frontend FURY Backend Legacy RDBMS
Legacy System Session Storage FURY Requests 200 OK

Legacy System Session Storage Collect & Export

Legacy System Session Storage Requests to Legacy System 404 NOT FOUND 200 OK

Client /product

Client /checkout/cart

Client Cart Service /checkout/cart

CHOOSING A FRAMEWORK

SYMFONY LARAVEL ZEND

$ du -hs emtpy-symfony-project 47M emtpy-symfony-project $ phploc empty-symfony-project phploc
3.0.1 by Sebastian Bergmann. Directories 978 Files 4620 Size Lines of Code (LOC) 580300 Comment Lines of Code (CLOC) 177172 (30.53%) Non-Comment Lines of Code (NCLOC) 403128 (69.47%) Logical Lines of Code (LLOC) 121983 (21.02%)

WE TAKE A 5 MEGABYTE BASE IMAGE AND ADD 50
MEGABYTES OF FRAMEWORK TO IT

SYMFONY LARAVEL SLIM ZEND SILEX LUMEN EXPRESSIVE

{ "name": "slim/slim", "require": { "php": ">=5.5.0", "pimple/pimple": "^3.0", "psr/http-message":
"^1.0", "nikic/fast-route": "^1.0", "container-interop/container-interop": "^1.1" }, } Slim's composer.json (excerpt)

PSR-7 HTTP MESSAGE INTERFACES

http://zendframework.github.io/zend-expressive/

YOU DON'T NEED TO WRITE EVERYTHING YOURSELF BUT IT'S EASIER
THAN YOU MIGHT THINK

YOU WON'T NEED MORE THAN 500 LOGICAL LINES OF CODE

$ phploc src phploc 3.0.1 by Sebastian Bergmann. Directories 10
Files 48 Size Lines of Code (LOC) 1427 Comment Lines of Code (CLOC) 418 (29.29%) Non-Comment Lines of Code (NCLOC) 1009 (70.71%) Logical Lines of Code (LLOC) 313 (21.93%)

AUTOMATING DEPLOYMENT

DO NOT RELY ON THIRD-PARTY IMAGES FROM DOCKER HUB

https://hub.docker.com/explore/

BUILD YOUR OWN DOCKER IMAGES

https://www.ansible.com/ansible-container

Building the Base Image git checkout ansible-container build docker tag
docker push

Building the Application Image git checkout phpunit & co docker
tag docker push docker build

VERSIONING YOUR API IS CRUCIAL

VERSION 1 Product   Service VERSION 1 Cart   Service
VERSION 1 Checkout   Service VERSION 1 Core VERSION 1 VERSION 1 VERSION 1 Cart   Service VERSION 2 Core VERSION 2

VERSION 2 Product   Service VERSION 1 Cart   Service
VERSION 1 Checkout   Service VERSION 1 Core VERSION 1 VERSION 1 VERSION 1 Cart   Service VERSION 2 Core VERSION 2

IS IT REALLY WORTH THE EFFORT?

COMPONENTIZED CODE OVER COMPONENTIZED SYSTEMS

THANK YOU! https://github.com/kartenmacherei/ @belanur https://joind.in/talk/39672

A Developer's Survival Guide for the Microservice Era

A Developer's Survival Guide for the Microservice Era

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