NDB server instance is OK even if no image is uploaded: NBD server is not running until an image is uploaded. Make sure that the promise doesn't fail until the image is there. Also display a WARNING in the connection parameter to say that the NBD server is not running.
display url-additionnal in resilient kvm
better network connection information
Check out, review, and merge locally
Step 1.
Fetch and check out the branch for this merge request