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kevinveenbirkenbachandClaude Opus 5.5
ae259a9f58
The local 061 Nextcloud swarm step failed on every lab node in
"Ask the driver which CUDA devices this host carries" with
"[Errno 2] No such file or directory: b'nvidia-smi'". The lab nodes are
privileged containers (compose/swarm/compose.yml), so on a workstation
with an NVIDIA card they see the host's /dev/nvidia0, but they carry no
driver. The device node alone made them GPU hosts, for the GPU include
and for lookup('gpu') alike, which would also have picked a -cuda image
and runtime: nvidia for a GPU service there.
The role now stats SYS_SVC_CONTAINER_GPU_DRIVER (/usr/bin/nvidia-smi)
first and stats the device node only where the driver exists; the
skipped register reads as "no device" in lookup('gpu'), and the include
requires a device stat that ran and found the node. The query runs the
same binary the detection probed. Hosts with driver and device (bare
metal with the driver, the compose dev container through the GPU
override) and hosts without a device (CI) behave as before.
test_gpu_detection walks the real tasks over the four driver/device
cells and fails on the old 00_core.yml in exactly the device-without-
driver cell.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>