Ignite Session DevOpsDays TLV 2015
How Immutable Can You Get - Anton Weiss, OTomato - DevOpsDays Tel Aviv 2015
Apr 14, 2017
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Ignite SessionDevOpsDays TLV 2015
CM Tools are Doomed!
Puppet SaltAnsibleChef
R.I.P
in near future
Uncontrollable Drift!
Caused by: • Deployment time variance • Manual tweaks • Mysterious bit rot
This is a f***ing chaos?! So what do we do?!
Immutable Servers!!!
Immutable Infrastructure is King
• Build your servers once • Never upgrade or downgrade packages • Never change configuration • Don’t update your code • Block SSH (!)
Ordnung Muss Sein
But We Want Change!
To improve is to change; to be perfect is to change often.
Winston Churchill
What? Rebuild the whole thing?
But I only want to change an iptables rule!!!
Let’s make small Boxes!!!
Let’s build Micro -Services!!!
Let’s use Containers!!!
LXD Docker Rocket
Now.. How do We Manage
All These Small Immutable Thingies?
Divide and Conquer!
STATE
EPHEMERAL
StorageMonitoring Logs Service Discovery
Load Balancing
StorageMonitoring Logs Service Discovery
Load Balancing
Management Layer
StorageMonitoring Logs Service Discovery
Load Balancing
INFRASTRUCTURE!?!
Management Layer
What’s Immutable Now?
Some More Questions:
•Debugging? •Replacement Criteria? •Tooling?
Challenges:
•Tools! •12-factor only •Slow changes •Upfront effort
Immutable Servers May Be the
Only Solid Thing in the Fluid
Infrastructure of the Tomorrow
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