traefik/docs/content/middlewares/http/errorpages.md
2022-05-10 11:00:09 +02:00

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---
title: "Traefik Errors Documentation"
description: "In Traefik Proxy, the Errors middleware returns custom pages according to configured ranges of HTTP Status codes. Read the technical documentation."
---
# Errors
It Has Never Been Easier to Say That Something Went Wrong
{: .subtitle }
![Errors](../../assets/img/middleware/errorpages.png)
The Errors middleware returns a custom page in lieu of the default, according to configured ranges of HTTP Status codes.
!!! important
The error page itself is _not_ hosted by Traefik.
## Configuration Examples
```yaml tab="Docker"
# Dynamic Custom Error Page for 5XX Status Code
labels:
- "traefik.http.middlewares.test-errors.errors.status=500-599"
- "traefik.http.middlewares.test-errors.errors.service=serviceError"
- "traefik.http.middlewares.test-errors.errors.query=/{status}.html"
```
```yaml tab="Kubernetes"
apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
name: test-errors
spec:
errors:
status:
- "500-599"
query: /{status}.html
service:
name: whoami
port: 80
```
```yaml tab="Consul Catalog"
# Dynamic Custom Error Page for 5XX Status Code
- "traefik.http.middlewares.test-errors.errors.status=500-599"
- "traefik.http.middlewares.test-errors.errors.service=serviceError"
- "traefik.http.middlewares.test-errors.errors.query=/{status}.html"
```
```json tab="Marathon"
"labels": {
"traefik.http.middlewares.test-errors.errors.status": "500-599",
"traefik.http.middlewares.test-errors.errors.service": "serviceError",
"traefik.http.middlewares.test-errors.errors.query": "/{status}.html"
}
```
```yaml tab="Rancher"
# Dynamic Custom Error Page for 5XX Status Code
labels:
- "traefik.http.middlewares.test-errors.errors.status=500-599"
- "traefik.http.middlewares.test-errors.errors.service=serviceError"
- "traefik.http.middlewares.test-errors.errors.query=/{status}.html"
```
```yaml tab="File (YAML)"
# Custom Error Page for 5XX
http:
middlewares:
test-errors:
errors:
status:
- "500-599"
service: serviceError
query: "/{status}.html"
services:
# ... definition of error-handler-service and my-service
```
```toml tab="File (TOML)"
# Custom Error Page for 5XX
[http.middlewares]
[http.middlewares.test-errors.errors]
status = ["500-599"]
service = "serviceError"
query = "/{status}.html"
[http.services]
# ... definition of error-handler-service and my-service
```
!!! note ""
In this example, the error page URL is based on the status code (`query=/{status}.html`).
## Configuration Options
### `status`
The `status` option defines which status or range of statuses should result in an error page.
The status code ranges are inclusive (`500-599` will trigger with every code between `500` and `599`, `500` and `599` included).
!!! note ""
You can define either a status code as a number (`500`),
as multiple comma-separated numbers (`500,502`),
as ranges by separating two codes with a dash (`500-599`),
or a combination of the two (`404,418,500-599`).
### `service`
The service that will serve the new requested error page.
!!! note ""
In Kubernetes, you need to reference a Kubernetes Service instead of a Traefik service.
!!! info "Host Header"
By default, the client `Host` header value is forwarded to the configured error [service](#service).
To forward the `Host` value corresponding to the configured error service URL, the [passHostHeader](../../../routing/services/#pass-host-header) option must be set to `false`.
### `query`
The URL for the error page (hosted by [`service`](#service))).
There are multiple variables that can be placed in the `query` option to insert values in the URL.
The table below lists all the available variables and their associated values.
| Variable | Value |
|------------|--------------------------------------------------------------------|
| `{status}` | The response status code. |
| `{url}` | The [escaped](https://pkg.go.dev/net/url#QueryEscape) request URL. |