Webpages not rendering completly when using error pages

[Leosirth]

Do you want to request a feature or report a bug?

Bug

Did you try using a 1.7.x configuration for the version 2.0?

• Yes
• No

What did you do?

Updated traefik from 1.7.14 to 1.7.16

What did you expect to see?

Correct loading of web pages

What did you see instead?

When loading webpages through traefik not all objects are rendered, i.e. images or CSS.
i.e. getting heimdall, sometimes images are missing:

hitting F5 get different behaviour, but always not rendering everything:

But hitting CTRL+F5 in order to force a full refresh from website get a correct render of the page.

This is happening with all the backends (heimdall is only an example) and with every web browsers.
Going back to version 1.7.14 fix the issue.

This is happening also with version 1.7.15

Output of traefik version: (What version of Traefik are you using?)

v1.7.16 / maroilles

If applicable, please paste the log output in DEBUG level (--log.level=DEBUG switch)

I can't spot any differences on the logs, let me know what would be needed since I need to clean from personal data.

[Leosirth]

I don't think this is a configuration problem since it's not happening on previous version

[ldez]

Hello,

There is no change in the code on this subject.

You can check by yourself: v1.7.14...v1.7.16

[Leosirth]

Hi @ldez

maybe this, I make use of custom error pages:

753d173

I have not made any changes as well, I can replicate easly with every backends.

[ldez]

Could you provide your whole configuration (traefik.toml, docker-compose, ...)

[Leosirth]

Removing the custom error page fix the problem:

traefik.frontend.errors.network.backend | nginx-1
traefik.frontend.errors.network.query | /{status}.html
traefik.frontend.errors.network.status | 404

[ldez]

Could you provide a minimal reproducible case?

[mpl]

@Leosirth I cannot reproduce for now, even with error pages enabled. Do you see any errors in the chrome developper tools console?

[ldez]

@Leosirth Could you provide your whole configuration (traefik.toml, docker-compose, ...) and/or a minimal reproducible case?

[Leosirth]

Hi @mpl @ldez

I made some more test and I can see that Firefox 70.0b6 (64-bit) and IE 11.356.18362.0 are the ones more affected, nearly all the backends with custom error pages suffer this issue.

Going to Chrome 77.0.3865.75 I can reproduce the issue consistently with only one backend: nodered

I can't see any relevant on browser console, sometimes the site doesn't load at all without anything logged in console, sometimes it is partially loaded and I can see the following:

Resource interpreted as Stylesheet but transferred with MIME type text/plain: "https://nodered.examplecom/vendor/vendor.css".

I have also a grafana and huginn backends for which I'm unable to login (with every browser) getting an error 500 from traefik, but I can see that the request never reach the beackend, I can see the following in the traefik log for this (looks similar on the issue #5376 but I'm on 1.7.16):

traefik.log

{"log":"time=\"2019-09-16T19:14:51Z\" level=debug msg=\"request \u0026{Method:POST URL:/login Proto:HTTP/2.0 ProtoMajor:2 ProtoMinor:0 Header:map[Accept:[application/json, text/plain, */*] Accept-Encoding:[gzip, deflate, br] Accept-Language:[en-US,en;q=0.5] Content-Length:[49] Content-Type:[application/json;charset=utf-8] Dnt:[1] Origin:[https://grafana.example.com] Referer:[https://grafana.example.com/login] Te:[trailers] User-Agent:[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0]] Body:0xc00068a4b0 GetBody:\u003cnil\u003e ContentLength:49 TransferEncoding:[] Close:false Host:grafana.example.com Form:map[] PostForm:map[] MultipartForm:\u003cnil\u003e Trailer:map[] RemoteAddr:192.168.1.1:52049 RequestURI:/login TLS:0xc0006fb080 Cancel:\u003cnil\u003e Response:\u003cnil\u003e ctx:0xc0005785a0} matched white list \u0026{[] [0xc000643650] false false} - passing\"\n","stream":"stdout","time":"2019-09-16T19:14:51.425600639Z"}
{"log":"time=\"2019-09-16T19:14:51Z\" level=debug msg=\"vulcand/oxy/roundrobin/rr: begin ServeHttp on request\" Request=\"{\\\"Method\\\":\\\"POST\\\",\\\"URL\\\":{\\\"Scheme\\\":\\\"\\\",\\\"Opaque\\\":\\\"\\\",\\\"User\\\":null,\\\"Host\\\":\\\"\\\",\\\"Path\\\":\\\"/login\\\",\\\"RawPath\\\":\\\"\\\",\\\"ForceQuery\\\":false,\\\"RawQuery\\\":\\\"\\\",\\\"Fragment\\\":\\\"\\\"},\\\"Proto\\\":\\\"HTTP/2.0\\\",\\\"ProtoMajor\\\":2,\\\"ProtoMinor\\\":0,\\\"Header\\\":{\\\"Accept\\\":[\\\"application/json, text/plain, */*\\\"],\\\"Accept-Encoding\\\":[\\\"gzip, deflate, br\\\"],\\\"Accept-Language\\\":[\\\"en-US,en;q=0.5\\\"],\\\"Content-Length\\\":[\\\"49\\\"],\\\"Content-Type\\\":[\\\"application/json;charset=utf-8\\\"],\\\"Dnt\\\":[\\\"1\\\"],\\\"Origin\\\":[\\\"https://grafana.example.com\\\"],\\\"Referer\\\":[\\\"https://grafana.example.com/login\\\"],\\\"Te\\\":[\\\"trailers\\\"],\\\"User-Agent\\\":[\\\"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0\\\"]},\\\"ContentLength\\\":49,\\\"TransferEncoding\\\":null,\\\"Host\\\":\\\"grafana.example.com\\\",\\\"Form\\\":null,\\\"PostForm\\\":null,\\\"MultipartForm\\\":null,\\\"Trailer\\\":null,\\\"RemoteAddr\\\":\\\"192.168.1.1:52049\\\",\\\"RequestURI\\\":\\\"/login\\\",\\\"TLS\\\":null}\"\n","stream":"stdout","time":"2019-09-16T19:14:51.426230924Z"}
{"log":"time=\"2019-09-16T19:14:51Z\" level=debug msg=\"vulcand/oxy/roundrobin/rr: Forwarding this request to URL\" Request=\"{\\\"Method\\\":\\\"POST\\\",\\\"URL\\\":{\\\"Scheme\\\":\\\"\\\",\\\"Opaque\\\":\\\"\\\",\\\"User\\\":null,\\\"Host\\\":\\\"\\\",\\\"Path\\\":\\\"/login\\\",\\\"RawPath\\\":\\\"\\\",\\\"ForceQuery\\\":false,\\\"RawQuery\\\":\\\"\\\",\\\"Fragment\\\":\\\"\\\"},\\\"Proto\\\":\\\"HTTP/2.0\\\",\\\"ProtoMajor\\\":2,\\\"ProtoMinor\\\":0,\\\"Header\\\":{\\\"Accept\\\":[\\\"application/json, text/plain, */*\\\"],\\\"Accept-Encoding\\\":[\\\"gzip, deflate, br\\\"],\\\"Accept-Language\\\":[\\\"en-US,en;q=0.5\\\"],\\\"Content-Length\\\":[\\\"49\\\"],\\\"Content-Type\\\":[\\\"application/json;charset=utf-8\\\"],\\\"Dnt\\\":[\\\"1\\\"],\\\"Origin\\\":[\\\"https://grafana.example.com\\\"],\\\"Referer\\\":[\\\"https://grafana.example.com/login\\\"],\\\"Te\\\":[\\\"trailers\\\"],\\\"User-Agent\\\":[\\\"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0\\\"]},\\\"ContentLength\\\":49,\\\"TransferEncoding\\\":null,\\\"Host\\\":\\\"grafana.example.com\\\",\\\"Form\\\":null,\\\"PostForm\\\":null,\\\"MultipartForm\\\":null,\\\"Trailer\\\":null,\\\"RemoteAddr\\\":\\\"192.168.1.1:52049\\\",\\\"RequestURI\\\":\\\"/login\\\",\\\"TLS\\\":null}\" ForwardURL=\"http://10.0.3.8:3000\"\n","stream":"stdout","time":"2019-09-16T19:14:51.426273289Z"}
{"log":"time=\"2019-09-16T19:14:51Z\" level=debug msg=\"vulcand/oxy/forward: begin ServeHttp on request\" Request=\"{\\\"Method\\\":\\\"POST\\\",\\\"URL\\\":{\\\"Scheme\\\":\\\"http\\\",\\\"Opaque\\\":\\\"\\\",\\\"User\\\":null,\\\"Host\\\":\\\"10.0.3.8:3000\\\",\\\"Path\\\":\\\"\\\",\\\"RawPath\\\":\\\"\\\",\\\"ForceQuery\\\":false,\\\"RawQuery\\\":\\\"\\\",\\\"Fragment\\\":\\\"\\\"},\\\"Proto\\\":\\\"HTTP/2.0\\\",\\\"ProtoMajor\\\":2,\\\"ProtoMinor\\\":0,\\\"Header\\\":{\\\"Accept\\\":[\\\"application/json, text/plain, */*\\\"],\\\"Accept-Encoding\\\":[\\\"gzip, deflate, br\\\"],\\\"Accept-Language\\\":[\\\"en-US,en;q=0.5\\\"],\\\"Content-Length\\\":[\\\"49\\\"],\\\"Content-Type\\\":[\\\"application/json;charset=utf-8\\\"],\\\"Dnt\\\":[\\\"1\\\"],\\\"Origin\\\":[\\\"https://grafana.example.com\\\"],\\\"Referer\\\":[\\\"https://grafana.example.com/login\\\"],\\\"Te\\\":[\\\"trailers\\\"],\\\"User-Agent\\\":[\\\"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0\\\"]},\\\"ContentLength\\\":49,\\\"TransferEncoding\\\":null,\\\"Host\\\":\\\"grafana.example.com\\\",\\\"Form\\\":null,\\\"PostForm\\\":null,\\\"MultipartForm\\\":null,\\\"Trailer\\\":null,\\\"RemoteAddr\\\":\\\"192.168.1.1:52049\\\",\\\"RequestURI\\\":\\\"/login\\\",\\\"TLS\\\":null}\"\n","stream":"stdout","time":"2019-09-16T19:14:51.42628362Z"}
{"log":"time=\"2019-09-16T19:14:51Z\" level=debug msg=\"vulcand/oxy/forward/http: begin ServeHttp on request\" Request=\"{\\\"Method\\\":\\\"POST\\\",\\\"URL\\\":{\\\"Scheme\\\":\\\"http\\\",\\\"Opaque\\\":\\\"\\\",\\\"User\\\":null,\\\"Host\\\":\\\"10.0.3.8:3000\\\",\\\"Path\\\":\\\"\\\",\\\"RawPath\\\":\\\"\\\",\\\"ForceQuery\\\":false,\\\"RawQuery\\\":\\\"\\\",\\\"Fragment\\\":\\\"\\\"},\\\"Proto\\\":\\\"HTTP/2.0\\\",\\\"ProtoMajor\\\":2,\\\"ProtoMinor\\\":0,\\\"Header\\\":{\\\"Accept\\\":[\\\"application/json, text/plain, */*\\\"],\\\"Accept-Encoding\\\":[\\\"gzip, deflate, br\\\"],\\\"Accept-Language\\\":[\\\"en-US,en;q=0.5\\\"],\\\"Content-Length\\\":[\\\"49\\\"],\\\"Content-Type\\\":[\\\"application/json;charset=utf-8\\\"],\\\"Dnt\\\":[\\\"1\\\"],\\\"Origin\\\":[\\\"https://grafana.example.com\\\"],\\\"Referer\\\":[\\\"https://grafana.example.com/login\\\"],\\\"Te\\\":[\\\"trailers\\\"],\\\"User-Agent\\\":[\\\"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0\\\"]},\\\"ContentLength\\\":49,\\\"TransferEncoding\\\":null,\\\"Host\\\":\\\"grafana.example.com\\\",\\\"Form\\\":null,\\\"PostForm\\\":null,\\\"MultipartForm\\\":null,\\\"Trailer\\\":null,\\\"RemoteAddr\\\":\\\"192.168.1.1:52049\\\",\\\"RequestURI\\\":\\\"/login\\\",\\\"TLS\\\":null}\"\n","stream":"stdout","time":"2019-09-16T19:14:51.426296318Z"}
{"log":"time=\"2019-09-16T19:14:51Z\" level=debug msg=\"vulcand/oxy/forward/http: completed ServeHttp on request\" Request=\"{\\\"Method\\\":\\\"POST\\\",\\\"URL\\\":{\\\"Scheme\\\":\\\"http\\\",\\\"Opaque\\\":\\\"\\\",\\\"User\\\":null,\\\"Host\\\":\\\"10.0.3.8:3000\\\",\\\"Path\\\":\\\"\\\",\\\"RawPath\\\":\\\"\\\",\\\"ForceQuery\\\":false,\\\"RawQuery\\\":\\\"\\\",\\\"Fragment\\\":\\\"\\\"},\\\"Proto\\\":\\\"HTTP/2.0\\\",\\\"ProtoMajor\\\":2,\\\"ProtoMinor\\\":0,\\\"Header\\\":{\\\"Accept\\\":[\\\"application/json, text/plain, */*\\\"],\\\"Accept-Encoding\\\":[\\\"gzip, deflate, br\\\"],\\\"Accept-Language\\\":[\\\"en-US,en;q=0.5\\\"],\\\"Content-Length\\\":[\\\"49\\\"],\\\"Content-Type\\\":[\\\"application/json;charset=utf-8\\\"],\\\"Dnt\\\":[\\\"1\\\"],\\\"Origin\\\":[\\\"https://grafana.example.com\\\"],\\\"Referer\\\":[\\\"https://grafana.example.com/login\\\"],\\\"Te\\\":[\\\"trailers\\\"],\\\"User-Agent\\\":[\\\"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0\\\"]},\\\"ContentLength\\\":49,\\\"TransferEncoding\\\":null,\\\"Host\\\":\\\"grafana.example.com\\\",\\\"Form\\\":null,\\\"PostForm\\\":null,\\\"MultipartForm\\\":null,\\\"Trailer\\\":null,\\\"RemoteAddr\\\":\\\"192.168.1.1:52049\\\",\\\"RequestURI\\\":\\\"/login\\\",\\\"TLS\\\":null}\"\n","stream":"stdout","time":"2019-09-16T19:14:51.42630592Z"}
{"log":"time=\"2019-09-16T19:14:51Z\" level=debug msg=\"vulcand/oxy/forward: completed ServeHttp on request\" Request=\"{\\\"Method\\\":\\\"POST\\\",\\\"URL\\\":{\\\"Scheme\\\":\\\"http\\\",\\\"Opaque\\\":\\\"\\\",\\\"User\\\":null,\\\"Host\\\":\\\"10.0.3.8:3000\\\",\\\"Path\\\":\\\"\\\",\\\"RawPath\\\":\\\"\\\",\\\"ForceQuery\\\":false,\\\"RawQuery\\\":\\\"\\\",\\\"Fragment\\\":\\\"\\\"},\\\"Proto\\\":\\\"HTTP/2.0\\\",\\\"ProtoMajor\\\":2,\\\"ProtoMinor\\\":0,\\\"Header\\\":{\\\"Accept\\\":[\\\"application/json, text/plain, */*\\\"],\\\"Accept-Encoding\\\":[\\\"gzip, deflate, br\\\"],\\\"Accept-Language\\\":[\\\"en-US,en;q=0.5\\\"],\\\"Content-Length\\\":[\\\"49\\\"],\\\"Content-Type\\\":[\\\"application/json;charset=utf-8\\\"],\\\"Dnt\\\":[\\\"1\\\"],\\\"Origin\\\":[\\\"https://grafana.example.com\\\"],\\\"Referer\\\":[\\\"https://grafana.example.com/login\\\"],\\\"Te\\\":[\\\"trailers\\\"],\\\"User-Agent\\\":[\\\"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0\\\"]},\\\"ContentLength\\\":49,\\\"TransferEncoding\\\":null,\\\"Host\\\":\\\"grafana.example.com\\\",\\\"Form\\\":null,\\\"PostForm\\\":null,\\\"MultipartForm\\\":null,\\\"Trailer\\\":null,\\\"RemoteAddr\\\":\\\"192.168.1.1:52049\\\",\\\"RequestURI\\\":\\\"/login\\\",\\\"TLS\\\":null}\"\n","stream":"stdout","time":"2019-09-16T19:14:51.426315414Z"}
{"log":"time=\"2019-09-16T19:14:51Z\" level=debug msg=\"vulcand/oxy/roundrobin/rr: completed ServeHttp on request\" Request=\"{\\\"Method\\\":\\\"POST\\\",\\\"URL\\\":{\\\"Scheme\\\":\\\"\\\",\\\"Opaque\\\":\\\"\\\",\\\"User\\\":null,\\\"Host\\\":\\\"\\\",\\\"Path\\\":\\\"/login\\\",\\\"RawPath\\\":\\\"\\\",\\\"ForceQuery\\\":false,\\\"RawQuery\\\":\\\"\\\",\\\"Fragment\\\":\\\"\\\"},\\\"Proto\\\":\\\"HTTP/2.0\\\",\\\"ProtoMajor\\\":2,\\\"ProtoMinor\\\":0,\\\"Header\\\":{\\\"Accept\\\":[\\\"application/json, text/plain, */*\\\"],\\\"Accept-Encoding\\\":[\\\"gzip, deflate, br\\\"],\\\"Accept-Language\\\":[\\\"en-US,en;q=0.5\\\"],\\\"Content-Length\\\":[\\\"49\\\"],\\\"Content-Type\\\":[\\\"application/json;charset=utf-8\\\"],\\\"Dnt\\\":[\\\"1\\\"],\\\"Origin\\\":[\\\"https://grafana.example.com\\\"],\\\"Referer\\\":[\\\"https://grafana.example.com/login\\\"],\\\"Te\\\":[\\\"trailers\\\"],\\\"User-Agent\\\":[\\\"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0\\\"]},\\\"ContentLength\\\":49,\\\"TransferEncoding\\\":null,\\\"Host\\\":\\\"grafana.example.com\\\",\\\"Form\\\":null,\\\"PostForm\\\":null,\\\"MultipartForm\\\":null,\\\"Trailer\\\":null,\\\"RemoteAddr\\\":\\\"192.168.1.1:52049\\\",\\\"RequestURI\\\":\\\"/login\\\",\\\"TLS\\\":null}\"\n","stream":"stdout","time":"2019-09-16T19:14:51.426326511Z"}
{"log":"time=\"2019-09-16T19:14:51Z\" level=error msg=\"Recovered from panic in HTTP handler [192.168.1.1:52049 - /login]: interface conversion: *errorpages.codeCatcher is not http.CloseNotifier: missing method CloseNotify\"\n","stream":"stdout","time":"2019-09-16T19:14:51.426335506Z"}
{"log":"time=\"2019-09-16T19:14:51Z\" level=error msg=\"Stack: goroutine 349216 [running]:\\ngithub.com/containous/traefik/middlewares.recoverFunc(0x7faeb5526a70, 0xc000180060, 0xc0002e4200)\\n\\t/go/src/github.com/containous/traefik/middlewares/recover.go:40 +0x1b9\\npanic(0x27d3b20, 0xc0010c0360)\\n\\t/usr/local/go/src/runtime/panic.go:522 +0x1b5\\ngithub.com/containous/traefik/middlewares.(*responseRecorder).CloseNotify(0xc000b44c40, 0x321ed00)\\n\\t/go/src/github.com/containous/traefik/middlewares/stats.go:69 +0x43\\ngithub.com/containous/traefik/vendor/github.com/vulcand/oxy/utils.(*ProxyWriter).CloseNotify(0xc0010c0300, 0xc000e38a80)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/vulcand/oxy/utils/netutils.go:79 +0x12b\\nnet/http/httputil.(*ReverseProxy).ServeHTTP(0xc00161e460, 0x3225240, 0xc0010c0300, 0xc000710c78)\\n\\t/usr/local/go/src/net/http/httputil/reverseproxy.go:199 +0x158f\\ngithub.com/containous/traefik/vendor/github.com/vulcand/oxy/forward.(*httpForwarder).serveHTTP(0xc0007dc5b0, 0x321ed00, 0xc000b44c40, 0xc0002e4800, 0xc000caa220)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/vulcand/oxy/forward/fwd.go:540 +0x333\\ngithub.com/containous/traefik/vendor/github.com/vulcand/oxy/forward.(*Forwarder).ServeHTTP(0xc00077fc60, 0x321ed00, 0xc000b44c40, 0xc0002e4800)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/vulcand/oxy/forward/fwd.go:283 +0xf8\\ngithub.com/containous/traefik/middlewares/pipelining.(*Pipelining).ServeHTTP(0xc000caa230, 0x321ed00, 0xc000b44c40, 0xc0002e4800)\\n\\t/go/src/github.com/containous/traefik/middlewares/pipelining/pipelining.go:24 +0x6f\\ngithub.com/containous/traefik/vendor/github.com/vulcand/oxy/roundrobin.(*RoundRobin).ServeHTTP(0xc0007dc620, 0x321ed00, 0xc000b44c40, 0xc0002e4500)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/vulcand/oxy/roundrobin/rr.go:147 +0xfe\\ngithub.com/containous/traefik/middlewares.(*EmptyBackendHandler).ServeHTTP(0xc000caa330, 0x321ed00, 0xc000b44c40, 0xc0002e4500)\\n\\t/go/src/github.com/containous/traefik/middlewares/empty_backend_handler.go:28 +0x119\\ngithub.com/containous/traefik/vendor/github.com/urfave/negroni.Wrap.func1(0x321ed00, 0xc000b44c40, 0xc0002e4500, 0xc000b45060)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/urfave/negroni/negroni.go:41 +0x4d\\ngithub.com/containous/traefik/vendor/github.com/urfave/negroni.HandlerFunc.ServeHTTP(0xc00077fec0, 0x321ed00, 0xc000b44c40, 0xc0002e4500, 0xc000b45060)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/urfave/negroni/negroni.go:24 +0x4e\\ngithub.com/containous/traefik/vendor/github.com/urfave/negroni.middleware.ServeHTTP(0x31ddf20, 0xc00077fec0, 0xc00077ff40, 0x321ed00, 0xc000b44c40, 0xc0002e4500)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/urfave/negroni/negroni.go:33 +0x9c\\nnet/http.HandlerFunc.ServeHTTP(...)\\n\\t/usr/local/go/src/net/http/server.go:1995\\ngithub.com/containous/traefik/middlewares.(*IPWhiteLister).handle(0xc00077fb20, 0x321ed00, 0xc000b44c40, 0xc0002e4500, 0xc000b44c80)\\n\\t/go/src/github.com/containous/traefik/middlewares/ip_whitelister.go:49 +0x1ef\\ngithub.com/containous/traefik/vendor/github.com/urfave/negroni.HandlerFunc.ServeHTTP(0xc000caa050, 0x321ed00, 0xc000b44c40, 0xc0002e4500, 0xc000b44c80)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/urfave/negroni/negroni.go:24 +0x4e\\ngithub.com/containous/traefik/middlewares.(*IPWhiteLister).ServeHTTP(0xc00077fb20, 0x321ed00, 0xc000b44c40, 0xc0002e4500, 0xc000b44c80)\\n\\t/go/src/github.com/containous/traefik/middlewares/ip_whitelister.go:53 +0x5b\\ngithub.com/containous/traefik/vendor/github.com/urfave/negroni.middleware.ServeHTTP(0x31d7f40, 0xc00077fb20, 0xc00077ff20, 0x321ed00, 0xc000b44c40, 0xc0002e4500)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/urfave/negroni/negroni.go:33 +0x9c\\ngithub.com/containous/traefik/middlewares.(*metricsMiddleware).ServeHTTP(0xc0009ff0e0, 0x321ed80, 0xc00161e000, 0xc0002e4500, 0xc000b44aa0)\\n\\t/go/src/github.com/containous/traefik/middlewares/metrics.go:66 +0x2e5\\ngithub.com/containous/traefik/vendor/github.com/urfave/negroni.middleware.ServeHTTP(0x31d8080, 0xc0009ff0e0, 0xc00077ff00, 0x321ed80, 0xc00161e000, 0xc0002e4500)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/urfave/negroni/negroni.go:33 +0x9c\\nnet/http.HandlerFunc.ServeHTTP(...)\\n\\t/usr/local/go/src/net/http/server.go:1995\\ngithub.com/containous/traefik/middlewares/errorpages.(*Handler).ServeHTTP(0xc0007dc540, 0x7faeb5526a70, 0xc000180070, 0xc0002e4500, 0xc000b44a60)\\n\\t/go/src/github.com/containous/traefik/middlewares/errorpages/error_pages.go:78 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0xc000b44980)\\n\\t/go/src/github.com/containous/traefik/middlewares/request_host.go:20 +0x1c2\\ngithub.com/containous/traefik/vendor/github.com/urfave/negroni.middleware.ServeHTTP(0x31d7fc0, 0x546ec80, 0xc0008ee860, 0x7faeb5526aa0, 0xc0002d6200, 0xc0002e4200)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/urfave/negroni/negroni.go:33 +0x9c\\ngithub.com/containous/traefik/vendor/github.com/thoas/stats.(*Stats).ServeHTTP(0xc000117680, 0x321ed00, 0xc000b448c0, 0xc0002e4200, 0xc000b44920)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/thoas/stats/stats.go:88 +0xc5\\ngithub.com/containous/traefik/vendor/github.com/urfave/negroni.middleware.ServeHTTP(0x31da400, 0xc000117680, 0xc0008ee840, 0x321ed00, 0xc000b448c0, 0xc0002e4200)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/urfave/negroni/negroni.go:33 +0x9c\\ngithub.com/containous/traefik/middlewares.(*metricsMiddleware).ServeHTTP(0xc0005e8c80, 0x7faeb5526a70, 0xc000180060, 0xc0002e4200, 0xc000b44740)\\n\\t/go/src/github.com/containous/traefik/middlewares/metrics.go:66 +0x2e5\\ngithub.com/containous/traefik/vendor/github.com/urfave/negroni.middleware.ServeHTTP(0x31d8080, 0xc0005e8c80, 0xc0008ee820, 0x7faeb5526a70, 0xc000180060, 0xc0002e4200)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/urfave/negroni/negroni.go:33 +0x9c\\nnet/http.HandlerFunc.ServeHTTP(...)\\n\\t/usr/local/go/src/net/http/server.go:1995\\ngithub.com/containous/traefik/middlewares.NegroniRecoverHandler.func1(0x7faeb5526a70, 0xc000180060, 0xc0002e4200, 0xc000b446e0)\\n\\t/go/src/github.com/containous/traefik/middlewares/recover.go:24 +0x83\\ngithub.com/containous/traefik/vendor/github.com/urfave/negroni.HandlerFunc.ServeHTTP(0x2dca590, 0x7faeb5526a70, 0xc000180060, 0xc0002e4200, 0xc000b446e0)\\n\\t/go/src/github.com/containous/traefik/vendor/github.com/urfave/negroni/negroni.go:24 +0x4e\\ngithub.com/containous/traefik/vendor/github.com/urfave/negroni.middleware.ServeHTTP(0x31ddf20, 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0xc000bd8200, 0xc000580000)\\n\\t/usr/local/go/src/net/http/h2_bundle.go:5688 +0x89\\ncreated by net/http.(*http2serverConn).processHeaders\\n\\t/usr/local/go/src/net/http/h2_bundle.go:5422 +0x4f4\\n\"\n","stream":"stdout","time":"2019-09-16T19:14:51.426339733Z"}

Regarding my configuration please find below:

traefik.toml

logLevel="DEBUG"
defaultEntryPoints = ["https"]
################################################################
# API and dashboard configuration
################################################################
[api]
entrypoint="dashboard"
################################################################
# Docker configuration backend
################################################################
[docker]
endpoint = "tcp://localhost:2375"
domain = "example.com"
watch = true
exposedByDefault = false

[entryPoints]
  [entryPoints.http]
  address = ":80"
    [entryPoints.http.redirect]
    entryPoint = "https"
  [entryPoints.https]
  address = ":443"
  [entryPoints.dashboard]
  address = ":8181"
  [entryPoints.https.tls]

[acme]
acmeLogging = true
email = "admin@example.com"
storage = "/etc/traefik/acme/acme.json"
entryPoint = "https"
#onHostRule = true
#[acme.httpChallenge]
#entryPoint = "http"
[acme.dnsChallenge]
  provider = "acme-dns"
  delayBeforeCheck = 0
  disablePropagationCheck = true
[[acme.domains]]
  main = "*.example.com"
  sans = ["example.com"]

[metrics]
# To enable Traefik to export internal metrics to Prometheus
[metrics.prometheus]
  # Name of the related entry point
  #
  # Optional
  # Default: "traefik"
  #
  entryPoint = "dashboard"
  
  # Buckets for latency metrics
  #
  # Optional
  # Default: [0.1, 0.3, 1.2, 5.0]
  #
  buckets = [0.1,0.3,1.2,5.0]

I don't have a docker-compose to share, but nothing special configured on the containers.
About traefik labels I have this applied on every containers (with rule and port set accordingly):

name	value
traefik.enable	TRUE
traefik.frontend.errors.network.backend	nginx-1
traefik.frontend.errors.network.query	/{status}.html
traefik.frontend.errors.network.status	403
traefik.frontend.rule	Host:nodered.example.com
traefik.frontend.whiteList.sourceRange	192.168.0.0/16
traefik.frontend.whiteList.useXForwardedFor	FALSE
traefik.port	1880

[traefiker]

Closed by #5404.