Help with understanding path rewriting?

[tealtxgr]

I couldn't find any answer to this but I'm trying to basically just move something to a subpath. I can access the service at the subpath but any subsequent paths don't work.

So if I want to go from https://admin.domain.com/ to https://admin.domain.com/machine-name-1 and https://admin.domain.com/machine-name-2 how exactly do I set that up? I can get a resource to work at https://admin.domain.com/machine-name-1 but then when I try and use it, everything except the base path 404s.

For example, it tries to get https://admin.domain.com/api/content but if it's at /machine-name-1 it should go to https://admin.domain.com/machine-name-1/api/content. This seems straightforward but I'm failing at it- any help?

[krotname]

The important distinction is that Pangolin/Traefik path rewrite only changes the inbound request before it is proxied upstream. It cannot make the upstream app generate subpath-aware URLs in the browser.

So this part can work:

/browser asks /machine-name-1  -> rewrite/proxy to upstream /

But if the app later makes an absolute request to /api/content, the browser requests:

https://admin.domain.com/api/content

That request no longer has the /machine-name-1 prefix, so it will not match the /machine-name-1 route.

The reliable options are:

1. Use a subdomain per service, for example machine-name-1.admin.domain.com and machine-name-2.admin.domain.com.
2. If the upstream app supports a base/public URL, set it to /machine-name-1, then use a prefix path match in Pangolin and strip/rewrite that prefix before proxying upstream.
3. If the app does not support a base path, path rewrite alone will not be enough. You would need the app to emit relative/prefixed URLs, or response rewriting for HTML/JS/assets, which is brittle.

Adding another target for /machine-name-1/api/* -> /api/* can help only if the browser actually requests /machine-name-1/api/.... It will not fix an app that keeps requesting absolute /api/... from the domain root.

[tealtxgr]

Thanks! I'll have to just use deeper sub domains then. Appreciate the clarity