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get_address() fails when only nonstandard interface names are available #741
Description
ucxx.get_address() only auto-discovers interfaces whose names begin with ib, eth, or en. If every usable interface has another name, such as beth3 or beth4, it raises OSError("No devices found") even when those interfaces have valid addresses.
ucxx/python/ucxx/ucxx/utils.py
Line 189 in b9b9652
Expected behavior: preserve the existing ib, eth, and en priority, exclude loopback, then try all remaining interfaces in deterministic order.
Observed with UCXX 0.52.0 at commit 9169dc3daee00e6d7cb4feb77751a984ab3a1f23.
Activity
pentschev commentedon Sep 3, 2026
I don't think that's something we can reliably do. For example,
docker*will error/deadlock on systems with Docker, and this applies to many others depending on system configuration (other common cases aretun*,tap*,virbr0, etc.). At that stage the user needs to be capable of intervening, which is what theifnamekwarg in that function allows. If you have a concrete reliable suggestion, please let us know, but this is unfortunately something I think we cannot universally do.