In this presentation Nathan LeClaire outlines some of the ways Docker can help polyglots (those who speak multiple languages) to be more efficient and happier in their workflows.

1. DOCKER FOR POLYGLOTS
Nathan LeClaire, Open Source Engineer at Docker Inc.

2. WELCOME
• I appreciate your participation ! To speak at this
conference is an honor.
• Today we are going to talk about "Docker For
Polyglots".
• A "polyglot" is someone who speaks multiple
languages.

3. THANKYOU FOR
CONFERENCE

4. WHO AM I?
Nathan LeClaire (@upthecyberpunks)
Open Source Engineer, Docker Machine

5. I ❤ JAPAN

6. TOOLS OF MASSIVE
INNOVATION

7. TOOLS OF MASSIVE
INNOVATION

8. LET'S LOOK AT SOME FACTS

9. FACT:
VARIETY
• Developers want to use a variety of programming
languages
• "The right tool for the right job"
• This complicates the process of setting up
development environments and running operations

10. FACT:
TECHNOLOGY CHANGES RAPIDLY
• Front end web development alone has a huge
explosion of options including SASS, Grunt,
Yeoman, etc.
• Not every developer on your team is going to be
an expert in tooling for every language but they
still might want to contribute
• More friction == less productivity

11. FACT:
TOOLING IS DIFFICULT
• For instance, Maven might be intimidating to a Go
developer.
• Python programmers might want to use Ruby
sometimes but don't know how to use rbenv or
rvm
• Contributing to open source is very difficult for this
reason.

12. FACT:
"BUS FACTOR" RISK IS HIGH
• If "the person who sets up the environments" on
your team was hit by a bus tomorrow, would it be
easy or hard to keep going?
• Can any person on your team destroy their
development environment and re-build it from
scratch automatically?

13. FACT: DEPENDENCY HELL
Does this type of thing look familiar?

14. DOCKER CAN HELP
• Docker provides a way of distributing applications
• It also provides orchestration tools for developing
them
• End game is to reduce friction to the point where
transitioning between projects is seamless

18. MY DREAM:
SIMPLICITY

19. MY DREAM:
UNIFORMITY

20. MY DREAM:
PHOENIX DEVELOPMENT

21. WHAT IS A POLYGLOT?
"PROGRAMMING LANGUAGE"

22. WHAT IS A POLYGLOT?
"TOOLING LANGUAGE"

23. WHAT IS A POLYGLOT?
"DEVELOPER LANGUAGE"
"We need to add some migrations
to run for the database, a few
controllers, and also some jobs to
run in the background queue."

24. WHAT IS A POLYGLOT?
"OPERATOR LANGUAGE"
"Let's set up some automation
around our load balancers, store
these files in an S3 bucket and
consider moving to a cross-cloud
solution with overlay networking."

25. DOCKER LETS YOU DEFINE
AN ENVIRONMENT SIMPLY

26. EXAMPLE

27. I DON'T KNOW ANYTHING
ABOUT LUA...
...AND ONLY A LITTLE
ABOUT NGINX.

28. SETTING UP OPENRESTY
MANUALLY
$ sudo apt-get install -y make build-essential libreadline-dev libncurses5-dev
libpcre3-dev libssl-dev perl make build-essential
$ # Go to browser, click around on "Download Page"
$ wget https://openresty.org/download/ngx_openresty-1.9.3.1.tar.gz
$ tar xvf ngx_openresty-1.9.3.1.tar.gz
$ cd ngx_openresty-1.9.3.1
$ ./configure; make; make install

29. FORTUNATELYTHAT PROJECT
HAS GOOD DOCUMENTATION,
BUT WHAT IF IT DIDN'T?

30. WHAT IFYOU WANTTO INSTALL AUTOMATICALLY
ON ANOTHER COMPUTER?
OR EASILY SHAREYOUR APPLICATION WITH A
FRIEND OR COLLEAGUE?

31. REPLACE MANUAL METHOD
WITH ATINY BASH SCRIPT?

32. "YEAH, I KNOWYOU DEVELOP ON
DEBIAN, BUTTHIS NEEDSTO RUN ON
RHEL."

33. DEVELOPER
Installing software is
boring! I just want to
script nginx with Lua!

34. SOLUTION

35. WE CAN MAKE DOCKERFILE.
IT WILL RUN ON ANY OS WITH
COMPATIBLE KERNEL.
from debian:jessie
run apt-get update
run apt-get install -y
libreadline-dev
libncurses5-dev
libpcre3-dev
libssl-dev
perl
wget
make
build-essential
run mkdir -p /openresty
workdir /openresty
env OPENRESTY_VERSION 1.7.10.2
run wget http://openresty.org/download/ngx_openresty-${OPENRESTY_VERSION}.tar.gz
run tar xzvf ngx_openresty-${OPENRESTY_VERSION}.tar.gz
run cd ngx_openresty-${OPENRESTY_VERSION}/ &&
./configure &&
make &&
make install
env PATH /usr/local/openresty/nginx/sbin:$PATH
add https://get.docker.com/builds/Linux/x86_64/docker-latest /docker
run chmod +x /docker
add . /app
workdir /app
entrypoint ["./entrypoint.sh"]

36. BUILD, SHIP, & RUN
$ docker build -t nathanleclaire/openresty .
$ docker push nathanleclaire/openresty
$ # Now we can pull from anywhere!
$ # On another computer...
$ docker run -d -P nathanleclaire/openresty

37. YOU CAN USE AUTOMATED BUILDS ON
DOCKER HUBTO LEARN FROM OTHER
PEOPLE

38. LOTS OF CONTRIBUTION TO
DOCKER BECAUSE OF DOCKER

39. DOCKER MACHINE

40. DOCKER COMPOSE

41. DOCKER SWARM