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Create device nodes in JIT-CDI mode

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Signed-off-by: Evan Lezar <elezar@nvidia.com>
This commit is contained in:
Evan Lezar 2025-03-09 13:49:56 +02:00
parent 54ea4a24a7
commit 90b76ace37
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1 changed files with 23 additions and 0 deletions
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23
internal/modifier/cdi.go
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@ -18,6 +18,7 @@ package modifier
import ( import (
"fmt" "fmt"
"os/exec"
"strings" "strings"
"tags.cncf.io/container-device-interface/pkg/parser" "tags.cncf.io/container-device-interface/pkg/parser"
@ -28,6 +29,7 @@ import (
"github.com/NVIDIA/nvidia-container-toolkit/internal/lookup/root" "github.com/NVIDIA/nvidia-container-toolkit/internal/lookup/root"
"github.com/NVIDIA/nvidia-container-toolkit/internal/modifier/cdi" "github.com/NVIDIA/nvidia-container-toolkit/internal/modifier/cdi"
"github.com/NVIDIA/nvidia-container-toolkit/internal/oci" "github.com/NVIDIA/nvidia-container-toolkit/internal/oci"
"github.com/NVIDIA/nvidia-container-toolkit/internal/system/nvdevices"
"github.com/NVIDIA/nvidia-container-toolkit/pkg/nvcdi" "github.com/NVIDIA/nvidia-container-toolkit/pkg/nvcdi"
"github.com/NVIDIA/nvidia-container-toolkit/pkg/nvcdi/spec" "github.com/NVIDIA/nvidia-container-toolkit/pkg/nvcdi/spec"
) )
@ -204,6 +206,8 @@ func generateAutomaticCDISpec(logger logger.Interface, cfg *config.Config, drive
identifiers = append(identifiers, id) identifiers = append(identifiers, id)
} }
tryCreateDeviceNodes(logger, driver, identifiers...)
deviceSpecs, err := cdilib.GetDeviceSpecsByID(identifiers...) deviceSpecs, err := cdilib.GetDeviceSpecsByID(identifiers...)
if err != nil { if err != nil {
return nil, fmt.Errorf("failed to get CDI device specs: %w", err) return nil, fmt.Errorf("failed to get CDI device specs: %w", err)
@ -221,3 +225,22 @@ func generateAutomaticCDISpec(logger logger.Interface, cfg *config.Config, drive
spec.WithClass("gpu"), spec.WithClass("gpu"),
) )
} }
func tryCreateDeviceNodes(logger logger.Interface, driver *root.Driver, identifiers ...string) {
devices, err := nvdevices.New(
nvdevices.WithLogger(logger),
nvdevices.WithDevRoot(driver.Root),
)
if err != nil {
return
}
if err := devices.CreateNVIDIAControlDevices(); err != nil {
logger.Warningf("Failed to create control devices: %v", err)
}
// We run nvidia-smi -L to force the creation of the device nodes.
nvidiaSMI := exec.Command("nvidia-smi", "-L")
if err := nvidiaSMI.Run(); err != nil {
logger.Warningf("Failed to run nvidia-smi: %v", err)
}
}