Double redirect to /route-prefix/route-prefix/

[candlerb]

What did you do?

Run prometheus with flags:

--web.external-url=https://example.com/prometheus
--web.route-prefix=/prometheus

(intended for use with a reverse proxy). Then accessed it at /prometheus or /prometheus/

What did you expect to see?

Redirect to /prometheus/graph

What did you see instead? Under which circumstances?

Redirect to /prometheus/prometheus/graph, which gives a 404

# curl -Lv http://10.85.179.50:9090/prometheus
*   Trying 10.85.179.50...
* Connected to 10.85.179.50 (10.85.179.50) port 9090 (#0)
> GET /prometheus HTTP/1.1
> Host: 10.85.179.50:9090
> User-Agent: curl/7.47.0
> Accept: */*
>
< HTTP/1.1 301 Moved Permanently
< Location: /prometheus/
< Date: Wed, 16 Aug 2017 14:45:35 GMT
< Content-Length: 47
< Content-Type: text/html; charset=utf-8
<
* Ignoring the response-body
* Connection #0 to host 10.85.179.50 left intact
* Issue another request to this URL: 'http://10.85.179.50:9090/prometheus/'
* Found bundle for host 10.85.179.50: 0x557ddf43ff20 [can pipeline]
* Re-using existing connection! (#0) with host 10.85.179.50
* Connected to 10.85.179.50 (10.85.179.50) port 9090 (#0)
> GET /prometheus/ HTTP/1.1
> Host: 10.85.179.50:9090
> User-Agent: curl/7.47.0
> Accept: */*
>
< HTTP/1.1 302 Found
< Location: /prometheus/prometheus/graph
< Date: Wed, 16 Aug 2017 14:45:35 GMT
< Content-Length: 51
< Content-Type: text/html; charset=utf-8
<
* Ignoring the response-body
* Connection #0 to host 10.85.179.50 left intact
* Issue another request to this URL: 'http://10.85.179.50:9090/prometheus/prometheus/graph'
* Found bundle for host 10.85.179.50: 0x557ddf43ff20 [can pipeline]
* Re-using existing connection! (#0) with host 10.85.179.50
* Connected to 10.85.179.50 (10.85.179.50) port 9090 (#0)
> GET /prometheus/prometheus/graph HTTP/1.1
> Host: 10.85.179.50:9090
> User-Agent: curl/7.47.0
> Accept: */*
>
< HTTP/1.1 404 Not Found
< Content-Type: text/plain; charset=utf-8
< X-Content-Type-Options: nosniff
< Date: Wed, 16 Aug 2017 14:45:35 GMT
< Content-Length: 19
<
404 page not found
* Connection #0 to host 10.85.179.50 left intact

Note: if the user goes directly to the path /prometheus/graph then they see the front page as expected.

Environment

• System information:

  Linux 4.4.0-87-generic x86_64

• Prometheus version:

  prometheus, version 2.0.0-beta.1 (branch: HEAD, revision: 4dcb465029f39a2a3030333a81753f8a40ec90ce)
    build user:       root@d3f9974fac5a
    build date:       20170811-12:12:36
    go version:       go1.8.3
  

• Alertmanager version:

  n/a

• Prometheus configuration file:

  default

• Alertmanager configuration file:

  n/a

• Logs:

  n/a

[candlerb]

Note: this seems to be the same problem that #2832 was supposed to fix, which was merged on Jun 12.

However v2.0.0-beta.1 was cut on Aug 11.

[maximecharron]

@brian-brazil a #3091 has been to fix this issue. It can be closed :)

[brancz]

Thanks!

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.