Add a method to bypass YARN Proxy and provide a direct link in Services Page

[remysaissy]

Service pages in a Skein application is very useful. However being forced to go through the YARN Application Proxy can be problematic in some cases.

• limitations on HTTP Verbs
• SPA like Tensorboard, when launched through the YARN Web Proxy fail their xhr requests as they use the host:port in their URL rather than the full proxy path

Although this can be fixed on a per app/SPA, It would be very interesting to have a flavor of the ui.add_page method that allow to register the final link in the Service Page.

wdyt?

[jcrist]

Seems reasonable to me. I'd handle this by adding a proxy=False kwarg to add_page, defaulting to True. I'd also probably rename the ProxiedPage class to Page, and add a proxied attribute to that class.

Would you be interested in working on this?

[remysaissy]

Yes I can work on it.

When proxy=False, what about the route parameter? I would ignore its value in this case, only the link_name and the url is required.