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7/18/2019 Containers, Docker and Microservices
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7/18/2019 Containers, Docker and Microservices
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Containers,Docker, and
Microservice
7/18/2019 Containers, Docker and Microservices
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Jérôme Petazzoni(@jpetazzo)
Grumpy French DevOps- Go away or I will replace you
with a very small shell script
Runs everything in containers- Docker-in-Docker
- !"-in-Docker
- #M-in-Docker
- $org-in-Docker
- %%%
7/18/2019 Containers, Docker and Microservices
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Jérôme Petazzoni(@jpetazzo)
&uilt and scaled dotCloud!''( with )*+ servicesI counted them.- some e/amples0 hosts, nats,
containers, 1uilds, snapshots,
metrics, 1illing, user permissions,in2rastructure management, logs, %%%
7/18/2019 Containers, Docker and Microservices
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7/18/2019 Containers, Docker and Microservices
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outline
7/18/2019 Containers, Docker and Microservices
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Outline
3hy microservices4
3hat5s the challenge4
6ow does Docker help4
Getting started with stacks o2 containers
7/18/2019 Containers, Docker and Microservices
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why
microservic
7/18/2019 Containers, Docker and Microservices
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What is a microservice architectu
&reak 1ig application down into many small
7/ample0 e-commerce- we1 2ront-end
- catalog o2 products
- inventory8stock management
-shipping calculator
- payment processor
- 1illing8invoicing
- recommendation engine
- user pro2iles
7/18/2019 Containers, Docker and Microservices
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Why is this useful?
9se di22erent stacks 2or di22erent services
can 1e seen as 1oth good and 1ad.Replace e%g% re2actor. individual services easervice 1oundary en2orces '!I separation.
Decouples deployment: re;uires less coordin
deploy early, deploy o2ten: more agility.
6elps implementing <e22 &e=os5 >two-pi==a rmany small teams overper2orm a single 1ig
More e22ective >ownership? o2 services
7/18/2019 Containers, Docker and Microservices
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what5s the
challenge4
7/18/2019 Containers, Docker and Microservices
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7/18/2019 Containers, Docker and Microservices
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Issues e ill not a!!ress to!ay
Fast, e22icient R!C calls
-@eroR!C
- Cap5n !roto
- $MAR!C
- (O'!
-
Dnode- R7(B
- ueues like 'M!., 2or long-running8async operations
7/18/2019 Containers, Docker and Microservices
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Issues e ill not a!!ress to!ay
6ow to 1reak application down in small part
-this is not always easy
- try to get help 2rom people who have already done it
- 1ut0 it helps to achieve a 1etter architecture I promise.
7/18/2019 Containers, Docker and Microservices
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Issues e could a!!ress to!ay
Our app is now spread across multiple servic
Bhose services might will. end up on many
(ome o2 those services might will. 1e scale
Conse;uences0- our services will have to discover each other5s location
- we will have to learn a1out load 1alancing
7/18/2019 Containers, Docker and Microservices
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Issues e will a!!ress to!ay
3e5re deploying E microservices instead o2
3e want to 1e a1le to deploy o2ten
O1vious conse;uence0 our deploy process m- it must 1e 2ast
- it must 1e relia1le
-it must 1e automated
7/18/2019 Containers, Docker and Microservices
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how does
Docker hel
7/18/2019 Containers, Docker and Microservices
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the 1ig
picture
7/18/2019 Containers, Docker and Microservices
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"oc#er$s mission
build, ship, and run any application, anywhe
7/18/2019 Containers, Docker and Microservices
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%ay a&ain?
&uild0 package your application in a containe
(hip0 move that container 2rom a machine t
Run0 e/ecute that container i%e% your applic
'ny application0 anything that runs on Ainu/
'nywhere0 local M, cloud instance, 1are m
7/18/2019 Containers, Docker and Microservices
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1uild
7/18/2019 Containers, Docker and Microservices
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"oc#erfile
FROM ubuntu:14.04
MAINTAINER Docker Team <education@docker.
R!N a"t#$et u"dateR!N a"t#$et in%ta&& #' n$in(R!N ec)o *+i, I am in 'our container* -
u%r%)aren$in()tm&inde(.)tm&
/MD n$in(, #$, daemon o223
E56O7E 80
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7/18/2019 Containers, Docker and Microservices
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ship
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"oc#er 'u
Image name should 1e username8repo
e%g%0 Hpeta==o8we1docker push
docker pull
7/18/2019 Containers, Docker and Microservices
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7/18/2019 Containers, Docker and Microservices
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"oc#er 'u
Image name should 1e username8repo
e%g%0 Hpeta==o8we1docker push
docker pull
It5s magic
7/18/2019 Containers, Docker and Microservices
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7/18/2019 Containers, Docker and Microservices
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run
7/18/2019 Containers, Docker and Microservices
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*ecution is fast an! lightweight
Aet5s look at a 2ew 1enchmarks
7/18/2019 Containers, Docker and Microservices
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+enchmar#, container creation
9 time docker run ubuntu ec)o )e&&o o
)e&&o or&drea& 0m0.;8%
Disk usage0 less than )** k&
Memory usage0 less than )% M&
7/18/2019 Containers, Docker and Microservices
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+enchmar#, infinian!
7/18/2019 Containers, Docker and Microservices
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+enchmar#, oot Open%tac# inst
7/18/2019 Containers, Docker and Microservices
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+enchmar#, memory spee!
7/18/2019 Containers, Docker and Microservices
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7/18/2019 Containers, Docker and Microservices
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-et$s start a fe containers
<ust 2or run% 7h, 2or 2un%
7/18/2019 Containers, Docker and Microservices
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7/18/2019 Containers, Docker and Microservices
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any app
If i -i i ill i "
7/18/2019 Containers, Docker and Microservices
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If it runs on -inu*. it ill run in "
3e1 apps
'!I 1ackendsData1ases (A, "o(A.
&ig data
Message ;ueues
'nd more
If it -i it ill i "
7/18/2019 Containers, Docker and Microservices
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If it runs on -inu*. it ill run in "
Fire2o/-in-Docker
$org-in-Docker!"-in-Docker
Firewall-in-Docker
Docker-in-Docker
#M-in-Docker
7/18/2019 Containers, Docker and Microservices
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7/18/2019 Containers, Docker and Microservices
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anywhere
7/18/2019 Containers, Docker and Microservices
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anywhere
*Limitations may apply
"oc#er has official support for,
7/18/2019 Containers, Docker and Microservices
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"oc#er has official support for,
Intel + 1its /K+L+. code
Recent kernels %K and a1ove.Coming soon0 3indows ContainersI2 you have ;uestions a1out this, ask Micro
/0umors1 say that people also ru
7/18/2019 Containers, Docker and Microservices
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/0umors1 say that people also ru
Intel E 1its
'RM E and + 1itsMI!(
!owerK
Older kernels please don5t.
"ote0 the main issue is that the Docker 6u1 renot arch-aware, and images are not compati1
7/18/2019 Containers, Docker and Microservices
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CONTAINERSThey're stable they said Stack them they said
7/18/2019 Containers, Docker and Microservices
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runningstacks o2containers
7/18/2019 Containers, Docker and Microservices
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2irst steps
7/18/2019 Containers, Docker and Microservices
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2irst steps
Online tutorial in 1rowser, <( 1ased, =ero in
http088www%docker%com8tryit81ootEdocker E M& universal M image.http0881ootEdocker%io8
(cary install script
curl -s(A https088get%docker%com8 N sh3e have ordinary packages too
'nd most clouds have Docker images
3hec#list
7/18/2019 Containers, Docker and Microservices
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3hec#list
Install 1ootEdocker
Run your 2irst container echo hello world.
3rite your 2irst Docker2ile
Create your Docker 6u1 account 2ree.
!ush image to Docker 6u1
(etup automated 1uild
Run your 2irst comple/ app with Fig
7/18/2019 Containers, Docker and Microservices
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2i&
7/18/2019 Containers, Docker and Microservices
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2i&
Run your stack with one command0 2i$ u"
Descri1e your stack with one 2ile0 2i$.'m&
7/ample0 run a one node. Mesos cluster- Mesos master
- Mesos slave
-olt 2ramework
ma%ter: ima$e: red=ackme%o%#ma%ter
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command: me%o%#ma%ter ##ork>dir?me%o% "ort%: # 00:00
%&ae:
ima$e: red=ackme%o%#%&ae &ink%: # ma%ter:ma%ter command: me%o%#%&ae ##ma%ter?ma%ter:00 ##containerier%?docker o&ume%: # %'%2%c$rou":%'%2%c$rou" # arrundocker.%ock:arrundocker.%ock # u%rbindocker:bindocker
o&t: ima$e: o&to&t &ink%: # ma%ter:ma%ter command: ##ma%ter?ma%ter:00 "ort%: # 8080:8080
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7/18/2019 Containers, Docker and Microservices
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?
7/18/2019 Containers, Docker and Microservices
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what5s ne/
7/18/2019 Containers, Docker and Microservices
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4!vance! topics
7/18/2019 Containers, Docker and Microservices
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4!vance! topics
'll Bhings Docker
http0881log%docker%com8Running your own private registryhttps088githu1%com8docker8docker-registry
Containers and securityhttp088www%slideshare%net8Hpeta==o8docker-linu/-containers-l/c-and-se
https088medium%com8ewindisch8on-the-security-o2-containers-Ec+*22
(ervice discoverylook 2or >am1assador pattern?.
Q 'nd more
7/18/2019 Containers, Docker and Microservices
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thank you
;uestions
Woul! 5ou -i#e 6o 7no 8ore?
7/18/2019 Containers, Docker and Microservices
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ou ! ou e o o o e
Get in touch on Freenode
docker docker-dev'sk me tricky ;uestions Heromedocker%com
Get your own Docker 6u1 on prem
salesdocker%comFollow us on Bwitterdocker, Hpeta==o
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