Readiness Probe
In plain terms
A check determining whether a service can receive traffic.
Going deeper
A readiness probe verifies an app is ready to serve requests; if it fails, traffic is withheld until it's ready. It gates traffic, not restarts.
Under the hood
In Kubernetes, failing readiness removes the pod from service endpoints without restarting it.
Examples
Kubernetes, traffic routing, startup gating, rolling deploys, load balancing.
Think of it like...
Like an 'open' sign that only flips on once the shop is fully ready for customers.