API versioning with routing in Nginx - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is API versioning in the context of web services?

API versioning is a way to manage changes in an API by creating different versions. This helps keep old clients working while allowing new features or fixes in newer versions.

beginner

How does routing help with API versioning in nginx?

Routing directs incoming requests to different backend services or code based on the API version in the URL or headers. This way, nginx can send requests to the correct API version.

intermediate

Show a simple nginx location block for routing requests to API version 1 at path /v1/

location /v1/ { proxy_pass http://backend-v1; }

beginner

Why is it important to keep old API versions available?

Old API versions allow existing users or apps to keep working without breaking when new versions are released. It gives time to update clients safely.

beginner

What is a common way to specify API version in a request URL?

A common way is to include the version number as a path prefix, like /v1/, /v2/, etc. For example, https://api.example.com/v1/users

In nginx, which directive is used to forward requests to a backend server?

A proxy_pass

B rewrite

C listen

D server_name

The proxy_pass directive forwards requests to a backend server or service.

What is the main benefit of API versioning?

A To break old clients immediately

B To reduce server load

C To allow multiple versions to coexist

D To hide API endpoints

API versioning allows multiple versions to coexist so clients can choose which to use.

Which URL path would you use to route to API version 2?

A /v2/

B /v1/

C /api/

D /version/

The /v2/ path is commonly used to indicate API version 2.

If you want nginx to route requests with /v1/ to backend-v1 and /v2/ to backend-v2, what should you configure?

A Use listen directive

B Two location blocks with proxy_pass to different backends

C Use server_name directive

D One location block with rewrite

Two location blocks with proxy_pass allow routing to different backend services based on URL.

What happens if you don’t version your API and make breaking changes?

A No effect on clients

B API becomes faster

C Clients get automatic updates

D Old clients may stop working

Without versioning, breaking changes can cause old clients to fail.

Explain how nginx can be used to route requests to different API versions.

Think about how nginx matches URL paths and forwards requests.

Why is API versioning important and what are common ways to implement it?

Consider client needs and how servers handle different versions.