Intermittent issues with URL redirection

Traefik Traefik v1
,
1

Hi

I'm running traefik v1.7 on docker swarm. Below are the labels on my traefik container.

"traefik.app-redirect.frontend.redirect.permanent": "true",
"traefik.app-redirect.frontend.redirect.regex": "^https://[^/]+/(.*)",
"traefik.app-redirect.frontend.redirect.replacement": "https://test.com/$1",
"traefik.app-redirect.frontend.rule": "Host:example.com,www.example.com"

So, the expected behaviour is,

example.com is expected to be redirected to https://test.com/

But, 3 out of 6 times I try to hit the URL https://example.com/, the resultant URL is being redirected to,

https://test.com/example.com and since this path is invalid, it results in 404 error.

Any ideas on how to check this further?

2

The last release of Traefik v1 was in 2021 (link), you should really update. No bug fixes and security fixes for over 2 years.

If you still want to move on, please format your code with 3 backticks before and after, or select and use </> button.

3

thank you @bluepuma77 . Updated the original description. I agree that the running version is very old. However I'm trying to resolve this intermittent issue first as this is impacting the application.

4

I think the $ in label needs to be escaped. This works in v2 and v3:

- traefik.http.middlewares.mywwwredirect.redirectregex.regex=^https://www\.(.*)
- traefik.http.middlewares.mywwwredirect.redirectregex.replacement=https://$${1}

From simple Traefik example.

5

thank you for the response.

but I'm not really sure if that fits to my use case? apologies if I did miss anything.

regex would match with any host.

So if I test the regex expression that I mentioned in my initial post, I can see that the regex is correctly replacing the host, but when this is in live, I sometimes see the redirection is not working as expected.