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Frontend is not rendered when web-svc is accessed through kubeproxy #57

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ctaggart opened this issue Nov 27, 2018 · 8 comments
Open

Frontend is not rendered when web-svc is accessed through kubeproxy #57

ctaggart opened this issue Nov 27, 2018 · 8 comments

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@ctaggart
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When trying to access the web app through kubectl proxy at http://localhost:8001/api/v1/namespaces/emojivoto/services/web-svc:http/proxy/ , I get a blank page:

image

These other web apps work fine:
@klingerf
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@ctaggart Hmm, interesting -- it looks like the <title> attribute of that page is loading, since it's displayed in your tab. Can you check your javascript console to see if the page is throwing javascript errors?

@ctaggart
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ctaggart commented Nov 27, 2018 •
edited
Loading

Can you check your javascript console to see if the page is throwing javascript errors?

There are no errors logged to the javascript console in Firefox or Chrome.

@klingerf
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Hmm, ok, thanks for the quick reply. Can you also paste the output of curl -v http://localhost:8001/api/v1/namespaces/emojivoto/services/web-svc:http/proxy/?

@ctaggart
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*   Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 8001 (#0)
> GET /api/v1/namespaces/emojivoto/services/web-svc:http/proxy/ HTTP/1.1
> Host: localhost:8001
> User-Agent: curl/7.47.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Content-Length: 678
< Content-Type: text/html
< Date: Tue, 27 Nov 2018 03:09:34 GMT
<

        <!DOCTYPE html>
        <html>
                <head>
                        <meta charset="UTF-8">
                        <title>Emoji Vote</title>
                        <link rel="icon" href="/api/v1/namespaces/emojivoto/services/web-svc:http/proxy/img/favicon.ico">

                        <script async="" src="https://www.googletagmanager.com/gtag/js?id=UA-60040560-4"></script>
                        <script>
                          window.dataLayer = window.dataLayer || [];
                          function gtag(){dataLayer.push(arguments);}
                          gtag('js', new Date());
                          gtag('config', 'UA-60040560-4');
                        </script>
                </head>
                <body>
                        <div id="main" class="main"></div>
                </body>

                        <script type="text/javascript" src="/api/v1/namespaces/emojivoto/services/web-svc:http/proxy/js" async=""></script>

* Connection #0 to host localhost left intact
        </html>

@klingerf
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Ahh, interesting, I'm able to reproduce this locally as well. It looks like the emojivoto app doesn't work unless it's served from the root URL. Must be a javascript thing.

Instead of using kubectl proxy to view that app, can you try port forwarding instead? If you run:

kubectl -n emojivoto port-forward svc/web-svc 8899:80

Then you should hopefully see the app when you visit http://localhost:8899 in your browser.

@ctaggart
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Yes, the port-forward work-a-round works for me and I can proceed with linkerd evaluation. Would be nice to see the javascript thing fixed.

@ctaggart
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Following the tutorial, I applied:

kubectl get -n emojivoto deploy -o yaml \
  | linkerd inject - \
  | kubectl apply -f -

I clicked around the port-forwarded web application a bunch, but I'm not getting anything to show up. Is there a minimum number of requests or something like that?

cameron@Azure:~$ linkerd -n emojivoto stat deploy
NAME       MESHED   SUCCESS   RPS   LATENCY_P50   LATENCY_P95   LATENCY_P99   TLS
emoji         1/1         -     -             -             -             -     -
vote-bot      1/1         -     -             -             -             -     -
voting        1/1         -     -             -             -             -     -
web           1/1         -     -             -             -             -     -

@ctaggart ctaggart mentioned this issue Nov 27, 2018
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@klingerf
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Hmm, yeah, that's unexpected. I saw your comment on linkerd/linkerd2#1451, which is a good place to track that. Will follow up there, and I'll rename the title of this issue to track fixing the javascript issue.

@klingerf klingerf changed the title blank page when using kubectl proxy Frontend is not rendered when web-svc is accessed through kubeproxy Nov 27, 2018
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@klingerf @ctaggart