I need to set a custom error in traefik ingress on kubernetes so that when there is no endpoint or when the status is "404", or "[500-600]" it redirects to another error service or another custom error message I used the annotation as it's in the documentation in the ingress file as this (Note: this a helm template output of passing the annotation as a yaml in the values.yaml file)
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: frontend
namespace: "default"
annotations:
external-dns.alpha.kubernetes.io/target: "domain.com"
kubernetes.io/ingress.class: "traefik"
traefik.ingress.kubernetes.io/error-pages: "map[/:map[backend:hello-world status:[502 503]]]"
spec:
rules:
- host: frontend.domain.com
http:
paths:
- backend:
serviceName: frontend
servicePort: 3000
path: /
The answer by ldez is correct, but there are a few caveats:
Here's how the complete thing looks like. foo
is just a name, as explained in the other answer, and can be anything:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: frontend
namespace: "default"
annotations:
external-dns.alpha.kubernetes.io/target: "domain.com"
kubernetes.io/ingress.class: "traefik"
traefik.ingress.kubernetes.io/error-pages: |-
foo:
status:
- "404"
- "500"
# See below on where "error-pages" comes from
backend: error-pages
query: "/{{status}}.html"
spec:
rules:
# This creates an ingress on an non-existing host name,
# which binds to a service. As part of this a traefik
# backend "error-pages" will be created, which is the one
# we use above
- host: error-pages
http:
paths:
- backend:
serviceName: error-pages-service
servicePort: https
- host: frontend.domain.com
http:
# The configuration for your "real" Ingress goes here
# This is the service to back the ingress defined above
# Note that you can use anything for this, including an internal app
# Also: If you use https, the cert on the other side has to be valid
---
kind: Service
apiVersion: v1
metadata:
name: error-pages-service
namespace: default
spec:
ports:
- name: https
port: 443
type: ExternalName
externalName: my-awesome-errors.mydomain.test
If you use this configuration, and your app sends a 404, then https://my-awesome-errors.mydomain.test/404.html
would be shown as the error page.