1.
Deploying 3 times
a day without
any downtimeAlessandro Nadalin - VP Tech @ Namshi.com
Rocket Tech Summit 2015 - September 2015 - Berlin

2.
When was the last time that *.namshi.com was down?

3.
I don’t know

4.
I should know

5.
Probably now.

6.
SOA

7.
SOA
~40 services

8.
SOA
~40 services
docker

9.
SOA
~40 services
docker
heavy on JS

10.
SOA
~40 services
docker
heavy on JS
devoted to experimenting

11.
SOA
~40 services
docker
heavy on JS
devoted to experimenting
Result?

12.
A bit of history...

13.
“When are you guys gonna deploy it?”

14.
“In 2 weeks”
(2012)

15.
“Sometime this week”
(2013)

16.
“Possibly today”
(2014)

17.
Now.

18.
This is how it works
@ Namshi

19.
We don’t like centralization

20.
Single Point of Failure

21.
On error, rollback all the things!

22.
Black sheep syndrome

23.
Ship it

24.
Don’t wait tomorrow for what you can get today

25.
Result?

26.
Microservices

27.
microservice-based teams

28.
~40 services * ⅔ people = ~100 engineers

29.
~15 people rotate, assume different roles

30.
project-based teams

31.
quality over quantity

32.
“adding
manpower
to a late
project makes
it later”
https://goo.gl/Bc0uBf

33.
Communication
overhead
takes time to get
used to the
whole thing

34.
keep things small, flat, plain and simple

35.
means small teams, simple software

36.
What is the simplest way
to get devs their
development environment?

37.
FROM alpine
RUN apk add --update nodejs
COPY . /src
CMD node /src/index.js

38.
FROM alpine
RUN apk add --update nodejs
COPY . /src
CMD node /src/index.js
Docker

39.
How long does it take
to get started with any
of the microservices?

40.
git clone git@github.com:namshi/stuff.git
cd stuff
echo “127.0.0.1 stuff.namshi.com” >> /etc/hosts
docker-compose up

41.
git clone git@github.com:namshi/stuff.git (20s)
cd stuff
echo “127.0.0.1 stuff.namshi.com” >> /etc/hosts
docker-compose up

42.
git clone git@github.com:namshi/stuff.git (20s)
cd stuff (...)
echo “127.0.0.1 stuff.namshi.com” >> /etc/hosts
docker-compose up

43.
git clone git@github.com:namshi/stuff.git (20s)
cd stuff (...)
echo “127.0.0.1 stuff.namshi.com” >> /etc/hosts (...)
docker-compose up

44.
git clone git@github.com:namshi/stuff.git (20s)
cd stuff (...)
echo “127.0.0.1 stuff.namshi.com” >> /etc/hosts (...)
docker-compose up (depends on the image)

45.
git clone git@github.com:namshi/stuff.git (20s)
cd stuff (...)
echo “127.0.0.1 stuff.namshi.com” >> /etc/hosts (...)
docker-compose up (~5s with alpine)

46.
~ (master ✔) docker images | grep watchdog
watchdog_web [...] 38.74 MB

47.
Make it so that it takes
<2m to start hacking
on your services

48.
Make it simple.

49.
How do we get this
stuff to production?

50.
FROM alpine
RUN apk add --update nodejs
COPY . /src
CMD node /src/index.js

51.
FROM alpine
RUN apk add --update nodejs
COPY . /src
CMD node /src/index.js
It’s that simple.

52.
Ok, but how do I get to
deploy the container?

53.
There’s a bot
for everything

54.
@c3po deploy app1 patch-1 to staging

55.
All it takes is a 100 locs or so

56.
Is it really without a downtime?

57.
We’re actually down every time we deploy

58.
it’s just that no one notices

59.
keep a secondary setup up&running

60.
deploy there (with downtime), switch the LB

61.
http://martinfowler.com/bliki/BlueGreenDeployment.html

62.
Everything seems simple,
but how do you glue all
of this?

63.
github.com/namshi/roger

64.
github.com/namshi/roger

65.
We build following few
principles:

66.
Resilient

67.
"Resilience is accepting your [...] reality"
https://en.wikipedia.org/wiki/Elizabeth_Edwards

68.
Robust

69.
"Be conservative in what you send, be
liberal in what you accept"
https://en.wikipedia.org/wiki/Robustness_principle

70.
Simple

71.
"Innovation is saying no to 1,000 things"
http://www.goodreads.com/quotes/629613-people-think-focus-means-saying-yes-to-the-
thing-you-ve

72.
Safe

73.
"Each calling function must check non-void
function return values, and the validity of
parameters must be checked inside each
function."
http://sdtimes.com/nasas-10-rules-developing-safety-critical-code/

74.
Pragmatic

75.
"Each calling function must check non-void
function return values, and the validity of
parameters must be checked inside each
function,
unless you are 1000% freaking sure"
http://sdtimes.com/nasas-10-rules-developing-safety-critical-code/

76.
How does the typical
workflow look like?

77.
spend time spec-ing things out
before accepting them in the backlog

78.
“if it’s not simple enough, it’s wrong”

79.
+1 from a lead, less formal review from peers

80.
“more deletions, less additions”

81.
“we process 5 builds in parallel,
don’t piss others off”

82.
“don’t test everything,
just what you fear”

83.
Then, Go Live.

84.
Takeaways?

85.
break everything down

86.
MVA

87.
MVA
novice engineers are the ones who can’t abstract

88.
MVA
novice engineers are the ones who can’t abstract
senior engineers are the ones who can abstract

89.
MVA
novice engineers are the ones who can’t abstract
senior engineers are the ones who can abstract
great engineers are the ones who know when to abstract

90.
heterogeneous, committed team

91.
avalanche of go-live

92.
failure is always an option

93.
Dystopian architecture

94.
Dystopian architecture
http://www.infoq.com/news/2013/05/dystopia-as-a-service

95.
Challenges?

96.
queues of deployments

97.
parallel deployments based on cookie

98.
everything is new

99.
use the internal infra as a testing platform

100.
manual QA

101.
simplify the dangerous stuff, think 3ice before touching

102.
think mobile

103.
Desktop is the new Blackberry

104.
Whether you are
running everything
through an isomorphic
JavaScript framework

105.
every day
https://eng.asana.com/2014/02/scaling-asana-com/ & https://asana.com/luna

106.
or fatass ruby frontends

107.
30 times a day
https://github.com/blog/1241-deploying-at-github

108.
or you’re just
that crazy

109.
every 11.6 seconds
https://news.ycombinator.com/item?id=2971521

110.
(in 2011)
https://news.ycombinator.com/item?id=2971521

111.
Roll it out live.

112.
github.com/odino
twitter.com/_odino_
odino.org
VP Technology
github.com/namshi
twitter.com/TechNamshi
tech.namshi.com

113.
CREDITS
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