07ff4f1de8
Format the source according to latest goimports. Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com> Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
105 lines
2.8 KiB
Go
105 lines
2.8 KiB
Go
package daemon
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import (
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"os"
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"os/exec"
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"strconv"
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"strings"
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"github.com/containerd/containerd/contrib/nvidia"
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"github.com/docker/docker/pkg/capabilities"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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"github.com/pkg/errors"
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)
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// TODO: nvidia should not be hard-coded, and should be a device plugin instead on the daemon object.
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// TODO: add list of device capabilities in daemon/node info
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var errConflictCountDeviceIDs = errors.New("cannot set both Count and DeviceIDs on device request")
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const nvidiaHook = "nvidia-container-runtime-hook"
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// These are NVIDIA-specific capabilities stolen from github.com/containerd/containerd/contrib/nvidia.allCaps
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var allNvidiaCaps = map[nvidia.Capability]struct{}{
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nvidia.Compute: {},
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nvidia.Compat32: {},
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nvidia.Graphics: {},
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nvidia.Utility: {},
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nvidia.Video: {},
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nvidia.Display: {},
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}
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func init() {
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if _, err := exec.LookPath(nvidiaHook); err != nil {
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// do not register Nvidia driver if helper binary is not present.
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return
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}
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capset := capabilities.Set{"gpu": struct{}{}, "nvidia": struct{}{}}
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nvidiaDriver := &deviceDriver{
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capset: capset,
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updateSpec: setNvidiaGPUs,
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}
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for c := range allNvidiaCaps {
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nvidiaDriver.capset[string(c)] = struct{}{}
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}
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registerDeviceDriver("nvidia", nvidiaDriver)
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}
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func setNvidiaGPUs(s *specs.Spec, dev *deviceInstance) error {
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req := dev.req
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if req.Count != 0 && len(req.DeviceIDs) > 0 {
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return errConflictCountDeviceIDs
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}
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if len(req.DeviceIDs) > 0 {
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s.Process.Env = append(s.Process.Env, "NVIDIA_VISIBLE_DEVICES="+strings.Join(req.DeviceIDs, ","))
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} else if req.Count > 0 {
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s.Process.Env = append(s.Process.Env, "NVIDIA_VISIBLE_DEVICES="+countToDevices(req.Count))
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} else if req.Count < 0 {
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s.Process.Env = append(s.Process.Env, "NVIDIA_VISIBLE_DEVICES=all")
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}
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var nvidiaCaps []string
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// req.Capabilities contains device capabilities, some but not all are NVIDIA driver capabilities.
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for _, c := range dev.selectedCaps {
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nvcap := nvidia.Capability(c)
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if _, isNvidiaCap := allNvidiaCaps[nvcap]; isNvidiaCap {
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nvidiaCaps = append(nvidiaCaps, c)
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continue
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}
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// TODO: nvidia.WithRequiredCUDAVersion
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// for now we let the prestart hook verify cuda versions but errors are not pretty.
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}
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if nvidiaCaps != nil {
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s.Process.Env = append(s.Process.Env, "NVIDIA_DRIVER_CAPABILITIES="+strings.Join(nvidiaCaps, ","))
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}
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path, err := exec.LookPath(nvidiaHook)
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if err != nil {
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return err
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}
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if s.Hooks == nil {
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s.Hooks = &specs.Hooks{}
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}
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s.Hooks.Prestart = append(s.Hooks.Prestart, specs.Hook{
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Path: path,
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Args: []string{
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nvidiaHook,
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"prestart",
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},
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Env: os.Environ(),
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})
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return nil
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}
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// countToDevices returns the list 0, 1, ... count-1 of deviceIDs.
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func countToDevices(count int) string {
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devices := make([]string, count)
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for i := range devices {
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devices[i] = strconv.Itoa(i)
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}
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return strings.Join(devices, ",")
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}
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