Install and use xpra with napari on Della

vineetbansal / wbi

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Install and use xpra with napari on Della #13

Open vineetbansal opened 11 months ago

vineetbansal commented 11 months ago

xpra looks very promising from a latency point of view. As we saw earlier, we were able to install an xpra client locally, start the server on Della, connect remotely to it, and start napari on a conda environment on Della, and connect to it. This preparation work in necessary before we can see how to do this entirely progammatically using python.

This would involve:

Creation of a conda environment locally with napari installed. Look at how it works with the sample 00001_01.ome.tiff file (available on Napari website, also on Slack)>.
Installation of xpra client to see how to connect to Della and run remote commands.
Creation of a conda environment on Della, and execution of napari over Della (with sample tiff file again, but now located remotely).

Once this is done, we can move to issue #14.

anushka255 commented 10 months ago

Was running into few issues trying to run xpra on my computer, including:

OpenSSL 3.0's legacy provider failed to load
libc++abi: terminating due to uncaught exception of type NSException

Fixed the first one by setting an environment variable CRYPTOGRAPHY_OPENSSL_NO_LEGACY to 1. Fixed the second one by running the following command sudo xattr -rd com.apple.quarantine /Applications/Xpra.app\n which essentially removes the quarantine status from the Xpra application, allowing it to run without going through the usual Gatekeeper security checks in macOS. ( Found the workaround here: https://www.cs.utexas.edu/users/novak/xpra.html)

vineetbansal commented 10 months ago

Thanks for investigating. These findings will be useful for our long term documentation. Maybe make a new wiki page on this so it doesn't get buried.

anushka255 commented 10 months ago

Created a wiki page to document everything mentioned above but still running through issues running Xpra. Similar to what I went through when first using TurboVnc, the Xterm is not registering my keyboard inputs. The error message that shows up on command line is :

2023-11-30 12:13:47,646 Warning: no keyboard support, dlopen(/Applications/Xpra.app/Contents/Resources/lib/python/lib-dynload/objc/_objc.so, 0x0002): symbol not found in flat namespace '_ffi_find_closure_for_code_np