Pros, Cons, Pitfalls of common Docker container architectures (#dockitecture)

1. World®
’16
CAW Pros, Cons, and Pitfalls of Common
Docker Container Architectures (#Dockitecture)
Mark Emeis - Founder - Yipee.io
DO3X09SV
CA ACCELERATOR

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© 2016 CA. All rights reserved. All trademarks referenced herein belong to their respective companies.
The content provided in this CA World 2016 presentation is intended for informational purposes only and does not form any type of
warranty. The information provided by a CA partner and/or CA customer has not been reviewed for accuracy by CA.
For Informational Purposes Only
Terms of this Presentation

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Abstract
Containers, in particular Docker, have a tremendous buzz right now and for good reason. In
addition to the numerous direct benefits (service encapsulation, lightning fast startup, easy
distribution, simplified update, etc.), containers can be leveraged to realize the promise of
service oriented architectures. As with any emerging technology, there are numerous ways to
architect and implement solutions using Docker containers. This presentation will cover the
advantages, disadvantages, and pitfalls of several common architectural approaches. We will
discuss monolithic containers, micro-service containers, and various points in between.
Mark
Emeis
Yipee.io
Founder

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Agenda
WHY ARE WE HERE
BACKGROUND
COMMON ARCHITECTURES
ARCHITECTURE SCORE CARDS
SUMMARY AND TAKEAWAY
1
2
3
4
5

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New
Development
Availability
Extensibility
Maintainability
Portability
Scalability
Securability
Legacy Products
Maintainability
Portability
Moving to
the Cloud
Availability
Scalability
Securability
Why Are We Here

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Background
§ What are containers?
– Small, lightweight, encapsulated software functionality
– Share operating system kernel
– Long history (Solaris Zones, LXC)
§ What is Docker?
– Software containerization platform
– Linux container management, simplified
– Standards based
– Docker Inc. and Docker Open Source
Containers and Docker

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Background
§ 12 factor apps
– Configuration in the environment
– Stateless processes
– Disposability
– Development/production parity
§ Inter-container management
§ Intra-container management
Container Patterns

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Background
Cattle vs Pets

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Common Architectures
§ An application that moves as a
single unit
– Examples
§ Virtual Machine, Single Executable
– May have multiple components
§ Three tier application (Web, Business,
and Data Tier)
– Tightly coupled
– State managed in multiple locations
– Frequently a single language
Monolith – Primarily Pets
WebServer
Web UI
Business Logic
Utilities
TicketZap

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Pitfalls
Portability
Securability
Pros
Securability
Cons
Availability
Extensibility
Maintainability
Scalability
Common Architectures
Monolith – Primarily Pets

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Common Architectures
§ An application leveraging
external services
– Example external services
§ Authentication, analytics
– Will have multiple components,
processes
– Introducing concepts like queueing
to reduce coupling
– Introducing separation of concerns
§ Leveraging interface contracts
Hybrid – Pets With Some Cattle
WebServerWebServer
UI
Shop and
Purchase
Reporting
Admin
TicketZap
WebServerWebServer
REST (business)
Shop and
Purchase
Reporting
AdminUtilities
ORM
Analytics
AuthN

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Pitfalls
Maintainability
Portability
Securability
Pros
Maintainability
Portability
Securability
Cons
Availability
Extensibility
Scalability
Common Architectures
Hybrid – Pets With Some Cattle

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Common Architectures
§ An application comprised of
many stateless services
– Examples
§ Service oriented architectures
– Will have multiple services –
functional boundaries Loose
coupling
– Language agnostic
– Interface driven
– High cohesion and low coupling
Micro-Service – Primarily Cattle
TicketZap
Purchase
Analytics
AuthN
Purchase
API
Shop API
ShopShop
Report
APIReport
Admin
Utilities

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Pitfalls
Maintainability
Securability
Pros
Availability
Extensibility
Maintainability
Portability
Scalability
Securability
Cons
Common Architectures
Micro-Service – Primarily Cattle

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Architecture Score Cards

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Architecture Score Cards

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Summary and Takeaway
§ Applications leveraging hybrid and microservice
architectures are seeing benefits around non-functional
requirements including
– Maintainability
– Scalability
– Extensibility
§ Docker is a driving force for microservice architecture adoption
§ Yipee.io is a tool to aid in adoption

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TicketZap in Yipee.io

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Questions?

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References
§ Docker https://www.docker.com/
§ Open Container Initiative https://www.opencontainers.org/
§ Container patterns
– 12 Factor apps https://12factor.net/
– Autopilot http://autopilotpattern.io/

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