1. Building a Docker-ized Microservice
In Node, Using Ansible
Irakli'Nadareishvili,'
Director'of'Strategy,'API'Academy
@inadarei

2. 2 ©#2015#CA.#ALL#RIGHTS#RESERVED. @inadarei
Containers
Microservices
DevOps Automation
Being a Developer Has Never Been More Fun!

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Microservices: The Next Big Thing…

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What are Microservices?

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Martin Fowler:
6 http://martinfowler.com/articles/microservices.html
“We#cannot#say#there#is#a#formal#
definition#of#the#microservices
architectural#style,#but#we#can#
attempt#to#describe#what#we#see#
as#common#characteristics#for#
architectures#that#fit#the#label.#

6. 6 ©#2015#CA.#ALL#RIGHTS#RESERVED.
EVOLUTIONARY3DESIGN
Characteristicsof a Microservice Architectureper Fowler:
COMPONENTIZATION3VIA3SERVICES
ORGANIZED3AROUND3BUSINESS3CAPABILITIES
PRODUCTS,3NOT33PROJECTS
SMART3ENDPOINTS3AND3DUMB3PIPES
DECENTRALIZED3GOVERNANCE3&3DATA3MANAGEMENT
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5
INFRASTRUCTURE3AUTOMATION/DESIGN3FOR3FAILURE6
7

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In Essence:
Microservice)Architectural)Style)is)an)architectural)style)
where)a)complex)system)decomposed)into)a)collection)
of)services)that)are:
1. Autonomous)and)independently)deployable
2. Small)and)easily)replaceable.
3. And)each)service)delivers)a)distinct)capability)of)the)
system.
Single ResponsibilityPrinciple
meets
API-First Design

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Key Benefits of Microservices
Technology#Heterogeneity
Partitioned#Scalability#(per#microservice)
Independent#Deployments
Compose6ability
Optimized#for#Replace6ability
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5

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We Know It Is Popular:

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MicroserviceArchitecture
iscomplex
Uncomfortable truth:

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Monolith is brittle, but has order

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Microservices:High Degree of Freedom

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A Lot Of Things That Can Go Wrong
Gilt.com says)they)have)~450,microservices.)
Netflix is)also)in)several,hundred.)That's)a)very)
high)degree)of)freedom)– many,)many)moving)
parts.

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How do we afford somany servers?

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Microservices Deployment Topology
Tanker1
1
2
34
Tanker2
1
2
33
Tanker3
1
23
4
Tanker4
1
34

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MicroservicesAre NotFreeLunch

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Microservices Deployment Topology
Tanker1
1
2
34
Tanker2
1
2
33
Tanker3
1
23
4
Tanker4
1
34

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How Do We Know Where Everything Is?
1. Hashicorp Consul – multiGdataGcenter!
(Vagrant))G https://www.consul.io/
2. CoreOS')etcd
https://github.com/coreos/etcd
3. Kubernetes by)Google
http://kubernetes.io/
4. Mesos DNS)
https://github.com/mesosphere/mesosGdns
5. Apache)Zookeeper
https://zookeeper.apache.org/

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Microservice Discovery Topology
Tanker1
1
2
34
Tanker2
1
2
33
Tanker3
1
23
4
Tanker4
1
34
Consul3Server3Cluster
ms1.service.consul

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For#the#sake#of#this#demo#we#use#Docker NginxProxy#– lifesaver#for#
local#(dev)#setups.#But#in#production,#we#would#use#separate#Nginx
cluster#and#Consul#Template
Our Deployment Plan
Consul#Server#Cluster#(3#servers)
Consul#Clients#(2#servers#w/#Consul#Template)
DNSMasq on#Consul#Servers
Provision#Docker Hosts#(Tankers)
Install#Node.js Microservice#from#docker.io
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http://nodebootstrap.io

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github.com/apiacademy/ansible-consul-demo

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github.com/apiacademy/ansible-consul-demo

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github.com/apiacademy/ansible-consul-demo

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github.com/apiacademy/ansible-consul-demo
DEMO TIME

25. Director#of#Strategy,#API#Academy
Irakli3Nadareishvili
@inadarei
@apiacademy
@cainc