Marc Cluet gave a presentation on microservices and DevOps. He discussed how microservices force developers to design for failure and rely on loose coupling between services. He recommended hosting each microservice on its own server, using containers, implementing API versioning, and embracing asynchronous communication between services. While microservices provide benefits, they also introduce challenges around increased costs, network complexity, and service fragmentation.

1. Microservices and the CloudDevOpsMeetupAmsterdamMay2014
Marc Cluet
DevOps & Automation Advisory
Rackspace
https://www.flickr.com/photos/zachd1_618/5344850282

2. RACKSPACE® HOSTING | WWW.RACKSPACE.CO.UK
Who am I?!
Marc Cluet (@lynxman)
Head of DevOps Advisory
17 years of experience as a SysAdmin
Founding member of Juju and MAAS
while at Canonical
Leading a DevOps Engineering Team at
Rackspace
Been DevOps’in for the last 5 years

3. RACKSPACE® HOSTING | WWW.RACKSPACE.CO.UK
What is Rackspace?!
Founded in 1998 in San Antonio, TX by
three guys that wanted to create a hosting
company
Home of Fanatical Support /o/
Second biggest Public Cloud in the world
OpenStack Project co-founder

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So… Microservices!!
https://www.flickr.com/photos/wintermute2600/4056854111

5. RACKSPACE® HOSTING | WWW.RACKSPACE.CO.UK
So… Microservices!!
Microservices are not new!
!!

6. RACKSPACE® HOSTING | WWW.RACKSPACE.CO.UK
So… Microservices!!

7. RACKSPACE® HOSTING | WWW.RACKSPACE.CO.UK
So… Microservices!!
https://www.flickr.com/photos/marfis75/3279307888

8. RACKSPACE® HOSTING | WWW.RACKSPACE.CO.UK
So… Microservices!!
Microservices are reliant!
!!

9. RACKSPACE® HOSTING | WWW.RACKSPACE.CO.UK
So… Microservices!!
https://www.flickr.com/photos/5wa/8593739154

10. RACKSPACE® HOSTING | WWW.RACKSPACE.CO.UK
So… Microservices!!
Microservices force you to!
Design for Failure!!
!!

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So… Microservices!!

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Recommendations!
https://www.flickr.com/photos/sarunas_b/9630357613

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Cloud Fitting!
https://www.flickr.com/photos/egs/183990473

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Could Fitting!
https://www.flickr.com/photos/egs/183990473
Orchestration!
Cost Control!
Anti-Fragile!
Security in all Layers!
!!

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Cloud Fitting!
Router
API Server
Scheduler
MQ
Worker

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Cloud Fitting!
Load
Balancer
API Server
API Server
API Server
API Server
MQ
Worker
Worker
Worker
Worker
Scheduler

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Cloud Fitting!
Orchestration
Provisioning Config MgmtMetrics

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Cloud Fitting!
Orchestration! Metrics!
Provisioning! Config Mgmt!
cloud-init!
mcollective!

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Recommendations!
https://www.flickr.com/photos/mdpettitt/4818781521

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1 Server per Service!
https://www.flickr.com/photos/90994070@N00/4700774401

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Do your HA right!
https://www.flickr.com/photos/daverugby83/4583767689

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Containers!
https://www.flickr.com/photos/gcwest/281385801

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Containers!

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Containers!
<3!
!!

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Containers!

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API Versioning!
https://www.flickr.com/photos/kevinbyrom/5027408898/

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API Versioning!
https://www.flickr.com/photos/kevinbyrom/5027408898/
Version 1
/servers?image=imageId& flavor=flavorId& name=serverName&
status=serverStatus& marker=markerID& limit=int&changes-
since=dateTime& RAX-SI:image_schedule=boolean
Version 2
/v2/{tenant_id}/servers​{?changes-since,​image,​flavor,​name,​marker,​
limit,​status,​host}
Version 3
/v3/servers/{server_id}/action​{?changes-since,​image,​flavor,​name,​
marker,​limit,​status,​host}

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Sync vs Async!
https://www.flickr.com/photos/beate_meier/8337014543

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Sync vs Async!
Action 1 Action 2 Action 3

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Sync vs Async!
Action 1 Action 2
Action 2b
Action 3

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Sync vs Async!
Router
API Server
Scheduler
MQ
Worker

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Break things!!
https://www.flickr.com/photos/small_realm/6898449633

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Break things!!
https://www.flickr.com/photos/small_realm/6898449633

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Dark Side of Microservices!
https://www.flickr.com/photos/kalexanderson/7556757396

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Costs!
https://www.flickr.com/photos/amagill/3366720659

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Concentration!
https://www.flickr.com/photos/z_wenjie/5602616401

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Network Fragmentation!
https://www.flickr.com/photos/small_realm/6898449633

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https://www.flickr.com/photos/mikko_luntiala/12691267935
https://www.flickr.com/photos/dullhunk/202872717
@lynxman!
http://slideshare.net/lynxmanuk/!
http://www.rackspace.co.uk/technicalservices/ !
!

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