Host-based routing in Kubernetes - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is host-based routing in Kubernetes?

Host-based routing directs incoming traffic to different services based on the hostname in the request URL. It helps serve multiple websites or apps from the same IP address.

beginner

Which Kubernetes resource is commonly used to configure host-based routing?

The Ingress resource is used to define rules for host-based routing, specifying which hostnames map to which backend services.

intermediate

How does host-based routing differ from path-based routing?

Host-based routing uses the hostname (like example.com) to route traffic, while path-based routing uses the URL path (like /app1 or /app2) to decide where to send traffic.

beginner

What is a simple example of an Ingress rule for host-based routing?

An Ingress rule that sends traffic for host 'app.example.com' to service 'app-service' on port 80.

beginner

Why is host-based routing useful in real life?

It lets you run multiple websites or apps on one server or IP address, saving resources and making management easier.

Which Kubernetes resource is primarily used to implement host-based routing?

A Service

B Ingress

C Pod

D ConfigMap

Ingress defines rules for routing external traffic based on hostnames or paths.

Host-based routing directs traffic based on which part of the request?

A URL path

B IP address

C Hostname

D HTTP method

Host-based routing uses the hostname in the URL to decide where to send traffic.

What happens if no host rule matches in an Ingress configuration?

A Ingress controller crashes

B Traffic is dropped

C Traffic is routed randomly

D Traffic is routed to a default backend if configured

Ingress can have a default backend to handle unmatched requests.

Which of these is NOT a benefit of host-based routing?

A Route traffic by URL path

B Save IP addresses

C Serve multiple apps on one IP

D Simplify DNS management

Routing by URL path is path-based routing, not host-based.

In an Ingress rule, where do you specify the hostname for routing?

A spec.rules.host

B metadata.name

C spec.backend.serviceName

D spec.tls.hosts

The hostname is set under spec.rules.host in the Ingress YAML.

Explain how host-based routing works in Kubernetes and why it is useful.

Think about how websites use domain names to decide where to send visitors.

Describe the difference between host-based routing and path-based routing in Kubernetes Ingress.

Consider what part of the URL each routing method uses.