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Default backend

The default backend is a service which handles all URL paths and hosts the nginx controller doesn't understand (i.e., all the requests that are not mapped with an Ingress).

Basically a default backend exposes two URLs:

  • /healthz that returns 200
  • / that returns 404


The sub-directory /images/404-server provides a service which satisfies the requirements for a default backend.


The sub-directory /images/custom-error-pages provides an additional service for the purpose of customizing the error pages served via the default backend.