1.
Rethinking Configuration in the Age of Easy Redeployment
RackN, Inc
February, 2018
Note: Graphics mainly from http://pexels.com
<<< Shift Left <<<

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@zehicle #immutable

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3
@zehicle #immutable
1)
2)
3)
4)
5)

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@zehicle #immutable
sa !

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mu on

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@zehicle #immutable
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@zehicle #immutable
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Let’s o k w !

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Pre-de y fi d

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@zehicle #immutable
Delivery Pipeline
Deployment
Code
Build
Integrate
Run
Configure

10.
12
@zehicle #immutable
Delivery Pipeline
Deployment
Code
Build
Integrate
Run
Configure

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13
@zehicle #immutable
Delivery Pipeline
Deployment
Code
Build
Integrate
Run
Configure
Ini iz !

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15
@zehicle #immutable
StateManager
(e.g.Kubernetes)
Code
Build
Integrate
Run
Configure
Delivery Pipeline

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16
@zehicle #immutable
StateManager
(e.g.Kubernetes)
Code
Build
Integrate
Run
Configure
Delivery Pipeline
Kub te ? W !
Is ut > K8s?

14.
Immutable is a DevOps Pattern
<<< Shift Left & Create/Delete

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@zehicle #immutable
The Problem
package
server
image
provision
server
initial
config

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19
@zehicle #immutable
The Problem
package
server
image
provision
server
initial
config
patch 1

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20
@zehicle #immutable
The Problem
package
server
image
provision
server
initial
config
patch 1 patch 2

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21
@zehicle #immutable
The Problem
package
server
image
provision
server
initial
config
patch 1 patch 2
t e d s o n't
s o t c 2!

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22
@zehicle #immutable
The Problem
package
server
image
provision
server
initial
config
patch 1 patch 2
t e d s o n't
s o t c 2!●
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23
@zehicle #immutable
The Problem
package
server
image
provision
server
initial
config
patch 1 patch 2
SA !!

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24
@zehicle #immutable
Apply cloud and container lessons to our Bare Metal …
package
server
image
provision
server
initial
config
destroy!!

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25
@zehicle #immutable
Apply cloud and container lessons to our Bare Metal …
package
server
image
provision
server
initial
config
package
server
image
provision
server
initial
config
destroy!!
destroy!!patch 1

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26
@zehicle #immutable
Apply cloud and container lessons to our Bare Metal …
package
server
image
provision
server
initial
config
package
server
image
provision
server
initial
config
destroy!!
destroy!!patch 1
package
server
image
provision
server
initial
config
depatch 2

24.
27
@zehicle #immutable
Apply cloud and container lessons to our Bare Metal …
package
server
image
provision
server
initial
config
package
server
image
provision
server
initial
config
destroy!!
destroy!!patch 1
package
server
image
provision
server
patch N
package
server
image
provision
server
initial
config
depatch 2
initial
config

25.
Immutable Patterns
1) Baseline + Configuration
2) Live Boot + Configuration
3) Image Deploy

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Provisioning
System
Requested
State
Returned
State

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Provision requests are for a system state
with optional parameters.
The intermediate changes to achieve the
state are not exposed to the requester.
Provisioning
System
Reset Join
Install
Config
Test
Requested
State
Returned
State

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31
Provision requests are for a system state
with optional parameters.
The intermediate changes to achieve the
state are not exposed to the requester.
REMEMBER: Operators of the
provisioning system require high
transparency, stages and control.
Provisioning
System
Reset Join
Install
Config
Test
Requested
State
Returned
State
No h n
op i n !

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Provision ResetBaseline Configure Run

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Provision RebootBaseline Configure Run

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Provision
Deploy
Image
Run Provision
Deploy
Image
Run

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Tha n li ot
of k & re y ow!

34.
Interested in IMMUTABLE METAL?
It’s complicated, but we can get you there.
Start at http://portal.rackn.io
• Quickstart takes about 30 minutes
• Use your own hardware, VirtualBox or Packet.net
account
– use “RACKN100” on Packet.net for credit