cyansible
TRANSCRIPT
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CyansibleBlending Blue/Green Deployments
@Betterment
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Techcrunch DisruptMay 2010
90,000 customers, more every minute.
Fastest growing automated investing service
$2B+
Who are we?
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betterment :
investing::
devops : engineering
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it’s 2012.let’s ship some
code.
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Betterment@2012
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A Better Migration: From Snowflakes to StormtroopersWednesday, July 22, 6:30p - 8:00p @ AWS Pop-up Loft | NYC
Shameless Plug:
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it’s 2015.
let’s ship new code…without interrupting
production
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●Predictable●Repeatable●Minimal Human
Interaction●Zero User Interruption●Contained Failure
Dream Delivery
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Blue/Green Deployments
http://martinfowler.com/bliki/BlueGreenDeployment.html
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DNS
ELB
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Pre-flight Checklist
❏Stateless Servers❏Server Health Check❏Duplicate Full Stack
including RDS Replica
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Wait. Two Databases?“There's still the issue of dealing with missed transactions while the green environment was live, but depending on your design you may be able to...● feed transactions to both environments in such a
way as to keep the blue environment as a backup when the green is live. Or you may be able to...
● put the application in read-only mode before cut-over, run it for a while in read-only mode, and then switch it to read-write mode.”
http://martinfowler.com/bliki/BlueGreenDeployment.html
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“Code𝓲 always works on Schema +1𝓲 ”
(A.K.A. old code works on new schema)
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Publish, Migrate, Deploy
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Jenkins’ Job
1.Build2.Test3.Package4.Publish5.Run Migrations6.Invoke Ansible7.Cull Zombies
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Ansible’s Job
1.Check for S3 deliverables2.Spin up new EC2 Instance(s)3.Apply role(s) to instance(s)4.Find instance(s) in ELB5.Add new instance(s) to ELB &
tago status: in-use
6.Remove & tag instanceso status: zombie
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Bootstrapping Ansible
./exec/ directorycontains Jenkins entry
points
Ansible code lives in the repo it provisions.
Publish it like an app.
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./exec/brochure-deploy.sh
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brochure-deploy.yml
you are here.
00:00:10.888
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provision-new-ec2-instances
brochure-deploy >
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identify-elb-AZs
brochure-deploy > provision-new-ec2-instances >
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ec2-deploy
brochure-deploy > provision-new-ec2-instances >
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AMI Hierarchy
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brochure-deploy.yml
you are here.
00:01:18.415
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configure-instancesbrochure-deploy >
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roles/deploy/brochure/tasks/main.yml
brochure-deploy > configure-instances
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brochure-deploy.yml
you are here.
00:04:49.414
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brochure-deploy.yml
you are here.
00:04:50.188
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find-instances-in-elb
brochure-deploy >
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brochure-deploy.yml
you are here.
00:04:50.911
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add-instances-to-elb
brochure-deploy >
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brochure-deploy.yml
you are here.
00:05:06.295
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decommission-instances
brochure-deploy >
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brochure-deploy.yml
you are here.
00:05:21.226
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EC2 INSTANCE
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●Predictable●Repeatable●Minimal Human
Interaction●Zero User Interruption●Contained Failure
Dream Delivery Achieved
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The Future
● Long Running Instances + Dockero Huge speed improvement
● Post Monolith, Abandon Jenkins?o Travis CI for Build/Testo Tower for Deployment Orchestration
● Ansible Galaxy?
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All code snippets & diagrams contained in this presentation are property of Betterment, but please learn from them.
All photographs / GIFs used in this presentation are someone else’s.Street Fighter, Back To The Future, Indiana Jones, Futurama, and Arrested Development are someone
else’s property too.