Cannot use external kernal via allow_external_kernels and kernels.external_connection_dir #385
Description
Description
And external program is serving a kernel (in my case using the xeus code) and jupyverse is started with the options
--set "kernels.external_connection_dir=<directory_containing_connection.json> --set "kernels.allow_external_kernels=true"
In the jupyverse webserver the kernel is not visible
Note: it maybe that that I'm misunderstanding the intention of the kernels.allow_external_kernels and kernels.external_connection_dir options. This has also been discussed on the Jupyter Discourse Forym
AFAICT there is code to pickup and existing connection.json file but this does not configure a connectable kernel in the web interface.
Reproduce
- Start an external kernel with a connection.json file e.g. :
{
"transport": "tcp",
"ip": "127.0.0.1",
"control_port": 55684,
"shell_port": 60315,
"stdin_port": 55844,
"iopub_port": 52554,
"hb_port": 63106,
"signature_scheme": "hmac-sha256",
"key": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
"kernel_name": "MyKernel"
}
- Start jupyverse pointing to the directory containing this kernel
jupyverse.exe" --set "kernels.external_connection_dir=<connection.json_dir>" --set "kernels.allow_external_kernels=true" --port=8800
Expected behavior
Kernel MyKernel will be an option in the web interface
Context
- Operating System and version: Windows 11
- Browser and version: Firefox 122.0 (64-bit)
- Jupyter Server version: 0.4.2
I added some logger.info statements to check that the connection.json file was being read - see the ouput lines with ** below
Command Line Output
``` [2024-02-06 09:20:13,172 INFO] Running in development mode [2024-02-06 09:20:13,368 INFO] Starting application [2024-02-06 09:20:18,112 INFO] Scanning kernel config in D:\TempProj\DevBundle\Jupyter\install\Debug\external_kernels\ManiVault ** [2024-02-06 09:20:18,147 INFO] Processing connection files [2024-02-06 09:20:18,147 INFO] Processing file at path D:\TempProj\DevBundle\Jupyter\install\Debug\external_kernels\ManiVault\connection.json ** [2024-02-06 09:20:18,148 INFO] Adding kernel : MyKernel ** [2024-02-06 09:20:18,269 INFO] [2024-02-06 09:20:18,269 INFO] To access the server, copy and paste this URL: [2024-02-06 09:20:18,269 INFO] http://127.0.0.1:8800/?token=5c56ca0a7a474549afc3fcc3b88f6944 [2024-02-06 09:20:18,269 INFO] [2024-02-06 09:20:18,380 INFO] Started server process [49084] [2024-02-06 09:20:18,380 INFO] Uvicorn running on http://127.0.0.1:8800 (Press CTRL+C to quit) ```
Browser Output
MyKernel is not visible in the select kernel options