# Redirect with domain replacement
# Note: all dollar signs need to be doubled for escaping.
labels:
  - "traefik.http.middlewares.test-redirectregex.redirectregex.regex=^http://localhost/(.*)"
  - "traefik.http.middlewares.test-redirectregex.redirectregex.replacement=http://mydomain/$${1}"

# Redirect with domain replacement
apiVersion: traefik.io/v1alpha1
kind: Middleware
metadata:
  name: test-redirectregex
spec:
  redirectRegex:
    regex: ^http://localhost/(.*)
    replacement: http://mydomain/${1}

# Redirect with domain replacement
# Note: all dollar signs need to be doubled for escaping.
- "traefik.http.middlewares.test-redirectregex.redirectregex.regex=^http://localhost/(.*)"
- "traefik.http.middlewares.test-redirectregex.redirectregex.replacement=http://mydomain/$${1}"

"labels": {
  "traefik.http.middlewares.test-redirectregex.redirectregex.regex": "^http://localhost/(.*)",
  "traefik.http.middlewares.test-redirectregex.redirectregex.replacement": "http://mydomain/${1}"
Rancher
# Redirect with domain replacement
# Note: all dollar signs need to be doubled for escaping.
labels:
  - "traefik.http.middlewares.test-redirectregex.redirectregex.regex=^http://localhost/(.*)"
  - "traefik.http.middlewares.test-redirectregex.redirectregex.replacement=http://mydomain/$${1}"
File (YAML)
# Redirect with domain replacement
http:
  middlewares:
    test-redirectregex:
      redirectRegex:
        regex: "^http://localhost/(.*)"
        replacement: "http://mydomain/${1}"
File (TOML)
# Redirect with domain replacement
[http.middlewares]
  [http.middlewares.test-redirectregex.redirectRegex]
    regex = "^http://localhost/(.*)"
    replacement = "http://mydomain/${1}"
Configuration Options¶
permanent¶
Set the permanent option to true to apply a permanent redirection.
regex¶
The regex option is the regular expression to match and capture elements from the request URL.
Regular expressions and replacements can be tested using online tools such as Go Playground or the Regex101.
When defining a regular expression within YAML, any escaped character needs to be escaped twice: example\.com needs to be written as example\\.com.
replacement¶
The replacement option defines how to modify the URL to have the new target URL.
Warning
Care should be taken when defining replacement expand variables: $1x is equivalent to ${1x}, not ${1}x (see Regexp.Expand), so use ${1} syntax.