What is Immutable Infrastructure?
A practice where servers are never modified after deployment. Instead, new servers replace old ones entirely.
Why It Matters
Immutable infrastructure eliminates configuration drift and makes deployments predictable and repeatable.
Real-World Example
Instead of updating software on a running server, building a new server image and replacing the old one entirely.
“Understanding terms like Immutable Infrastructure matters because it helps you have better conversations with developers and make smarter decisions about your software. You do not need to be technical. You just need to know enough to ask the right questions.”
Related Terms
Infrastructure as Code (IaC)
Managing servers, networks, and other infrastructure through code files rather than manual setup.
Docker
A tool that packages your application and everything it needs to run into a standardised container
Blue-Green Deployment
A deployment strategy that runs two identical production environments, switching traffic from the old to the new.
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Related Terms
Docker
A tool that packages your application and everything it needs to run into a standardised container
Infrastructure as Code (IaC)
Managing servers, networks, and other infrastructure through code files rather than manual setup.
Blue-Green Deployment
A deployment strategy that runs two identical production environments, switching traffic from the old to the new.
Server
A computer that runs continuously to handle requests, store data, and serve your application to users
Serverless
A way to run code without managing your own servers, where the cloud provider handles everything
Edge Functions
Code that runs on servers close to your users around the world, rather than in one central location