1. Container technology, Microservices, and DevOps
Digital Innovation Workshop
April 2019
Henrik Bærbak Christensen

2. Henrik Bærbak Christensen
Welcome
Connect to ‘AU Guest network’
If you have not already done so…
Download and install ‘VMWare Player/Fusion’
- on the ‘products’ pane
Download and unzip ‘M51-di19.zip’ from
Info on:
Run the M51 VM…
M51? Whirlpool galaxy 
Henrik Bærbak Christensen

3. Henrik Bærbak Christensen
The speaker...
Associated Professor since 2003
Dept. of computer science / University of Aarhus
Interests: Software architecture & Teaching
Leader for SWK part-time education at AU
Industrial experience
Architect and developer for a product suite of meteorological systems for Danish airports.
Collaborations with Danish companies: Danfoss, Systematic A/S, B&O, Jyske Bank, TDC, Mjølner, KMD, Stibo, and many others.
Recent software intensive projects: Net4Care, EcoSense, CloudArch, Crunch, and new stuff in the pipeline…
Imhotep
Henrik Bærbak Christensen

4. Henrik Bærbak Christensen
… SW in Production 
EcoSense Karibu
Imhotep
Henrik Bærbak Christensen

5. Henrik Bærbak Christensen
Commercial 
A brave new world in constant flux...
Join your colleagues and learn more in the new EVU course in
Henrik Bærbak Christensen

6. Henrik Bærbak Christensen
And You?
Name? Company?
Working with/about to work with containers?
Henrik Bærbak Christensen

7. The Workshop

8. Henrik Bærbak Christensen
Mission Statement
I want you to leave with
General understanding of motivation and techniques behind, well, Container technology, Microservices, and DevOps …
And hands-on experience on doing some of it using Docker…
Of course, quite an act of balance – breath and depth…
Henrik Bærbak Christensen

9. Henrik Bærbak Christensen
Agenda
Workshop – 19.00
Session 1: Intro
Session 2: Containers and Docker
Exercise: Build the buildscript for a Docker container
Using SkyCave server as case
Session 3: Microservice Orchestration and Swarm
Exercise: Build the orchestration for a microservice Swarm
Using SkyCave system as case
Henrik Bærbak Christensen

10. Or… Part 1: Infrastructure as Code for single server
Part 2: Infrastructure as Code for full systems
Henrik Bærbak Christensen

11. Back to the Agile Manifesto
Motivation
Back to the Agile Manifesto
Henrik Bærbak Christensen

12. Henrik Bærbak Christensen
The Trend
”Loan instead of own”
You do not buy software and install it, you rent it online
Computing as Utility
Henrik Bærbak Christensen

13. Henrik Bærbak Christensen
“Agile 2.0”
Agile 1.0
XP, TDD, Scrum, …
We produced software fast, but…
But satisfy customer?
Often software just spent a long time in the git repository before it actually began providing value for our customers...
Henrik Bærbak Christensen

14. Henrik Bærbak Christensen
“Agile 2.0”
Goal: Deliver value continuously through software
Requires:
Architecture: ”Splitting the whole into suitable parts”
Allowing these parts to evolve and deploy independently
Processes: ”Ensure efficient collaboration between teams through the full stack”
Not just design, implementation, and testing, but also QA, operations, monitoring
Technology: ”Ensure changed ‘parts’ are quickly moved from development into production”
‘Run on my machine => run on any machine’
Henrik Bærbak Christensen

15. Henrik Bærbak Christensen
Agile 2.0
Goal: Deliver value continuously through software
Requires:
Architecture: ”Splitting the whole into suitable parts”
Allowing these parts to evolve and change independently
Processes: ”Ensure efficient collaboration between teams through the full stack”
Not just design and implementation, but testing, QA, operations, monitoring
Technology: ”Ensure changed ‘parts’ are quickly moved from development into production”
‘Run on my machine => run on any machine’
Microservice Style
DevOps
Container Tech
Henrik Bærbak Christensen

16. Henrik Bærbak Christensen
Microservices?
Henrik Bærbak Christensen

17. Henrik Bærbak Christensen
So…
Evolve and deploy each microservice independently
Avoid those 6 month later big bang stop the system, lift the database scheme, start and hope it still works service windows
But… You open the box of pandora…
Which version??? 28 git/svn repos, all in own tempo
Which version??? Version not in git, but in protocol
”this message is version 45, but I only understand version 44”
Which log message??? Logging in 28 places
Testing??? Start and stop 28 services pr test case
 Join me in the EVU course…
Henrik Bærbak Christensen

18. What’s wrong with the old way?
The ”Monolith” way
Henrik Bærbak Christensen

19. Expert People From 2015 Master of IT thesis Why does this make sense?
“A typical development team includes UI designers/developers, backend developers, and database experts. […] and many other companies split the development process into several components, such as UI, backend, database and mobile applications.”
Why does this make sense?
UI designers
Application Server developers
Database designers
Boundaries between people 
Henrik Bærbak Christensen

20. Moving Code
Crossing the boundaries of environments for the full development-testing-deployment cycle is costly…
Reconfigurations
Setup
Changed architecture
Changed HW
Even worse
Different people
Someone else’s problem
Development Environment
Staging Environment
Production Environment
Boundaries between environments 
Henrik Bærbak Christensen

21. Henrik Bærbak ChristensenSo
The problems
Boundaries between people
Is it the fault of the UI guys, or the DB guys
Boundaries between environments
But it works on my machine ???
Henrik Bærbak Christensen

22. … may be solved by … ensuring that… Boundaries between people
Is it the fault of the UI guys, or the DB guys?
Boundaries between environments
But it works on my machine?
The same people:
small DevOps teams
The ‘same’ environment:
small containers
Microservices: About getting the right containers...
Henrik Bærbak Christensen

23. Henrik Bærbak Christensen
Mission Statement
So – to recap
We need three aspects in place
Microservice architecture
DevOps teams
Deployment technology
We cannot really do much in three hours on the first two
So – let us focus on the technology and let us play...
Henrik Bærbak Christensen