Pretty default backend

An easily customized pretty default backend replacement for Kubernetes Nginx ingress controller with a neutral default configuration.

Getting Started

A default installation will deploy a single instance of pretty-default-backend to the same namespace of the ingress that will utilize it.

Requirements

• Kubernetes
• Helm v3

Installation

Replace values [namespace-of-ingress], and [ingress-name] in the commands below according to your environment

1. Add Helm Repository

   helm add repo bsord https://h.cfhr.io/bsord/charts

2. Install the helm chart (to same namespace as ingress)

   helm install bsord/pretty-default-backend --set bgColor="#443322" --set brandingText="YourBrandingText" bsord/pretty-default-backend -n [namespace-of-ingress]

3. Configure an ingress to use pretty-default-backend with one of the following two options:

   • Patch the Ingress Directly

     kubectl annotate ingress [ingress-name] -n [namespace-of-ingress] \
     nginx.ingress.kubernetes.io/default-backend=pretty-default-backend --overwrite
     
     kubectl annotate ingress [ingress-name] -n [namespace-of-ingress] \
     nginx.ingress.kubernetes.io/custom-http-errors="404,503" --overwrite

   • Pass as parameters to standard templated Helm v3 chart

     Helm install [release-name] \
     --set "ingress.annotations.nginx\\.ingress\\.kubernetes\\.io/default-backend=pretty-default-backend" \
     --set  "ingress.annotations.nginx\\.ingress\\.kubernetes\\.io/custom-http-errors=404\\,503\\,501" \
     [repo/chart-name]

     Please note you must escape any special characters including commas and periods with a \ backslash when passing complex strings to --set.

Verifying

Browse to a location that does not exist and would trigger a 404 on the ingress you annotated above.

Parameters

The parameters below can be passed using --set KEY=VALUE in the helm install/upgrade command above.

Key	Value	Default
bgColor	Background color of the page in hex value	#334455
brandingText	Branding text at bottom of error box	BrandingText(2020)

Todo:

• Write a functional ReadMe
• Fix workflow so it only triggers on succesful merge
• Use seperate writer stream before sending response (prevent broken responses)
• Add support for rich html variable input