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Update nvidia_devices to call into nvidia-container-runtime-hook 

Signed-off-by: Renaud Gaubert <rgaubert@nvidia.com>
This commit is contained in:
Renaud Gaubert 2019-03-26 00:56:17 -07:00
parent 639880e6eb
commit bd3d46a9e5
1 changed files with 33 additions and 35 deletions
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68
daemon/nvidia_linux.go
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@ -1,8 +1,10 @@
package daemon
import (
"os"
"os/exec"
"strconv"
"strings"
"github.com/containerd/containerd/contrib/nvidia"
"github.com/docker/docker/pkg/capabilities"
@ -15,8 +17,7 @@ import (
var errConflictCountDeviceIDs = errors.New("cannot set both Count and DeviceIDs on device request")
// stolen from github.com/containerd/containerd/contrib/nvidia
const nvidiaCLI = "nvidia-container-cli"
const nvidiaHook = "nvidia-container-runtime-hook"
// These are NVIDIA-specific capabilities stolen from github.com/containerd/containerd/contrib/nvidia.allCaps
var allNvidiaCaps = map[nvidia.Capability]struct{}{
@ -29,7 +30,7 @@ var allNvidiaCaps = map[nvidia.Capability]struct{}{
}
func init() {
if _, err := exec.LookPath(nvidiaCLI); err != nil {
if _, err := exec.LookPath(nvidiaHook); err != nil {
// do not register Nvidia driver if helper binary is not present.
return
}
@ -45,45 +46,25 @@ func init() {
}
func setNvidiaGPUs(s *specs.Spec, dev *deviceInstance) error {
var opts []nvidia.Opts
req := dev.req
if req.Count != 0 && len(req.DeviceIDs) > 0 {
return errConflictCountDeviceIDs
}
if len(req.DeviceIDs) > 0 {
var ids []int
var uuids []string
for _, devID := range req.DeviceIDs {
id, err := strconv.Atoi(devID)
if err == nil {
ids = append(ids, id)
continue
}
// if not an integer, then assume UUID.
uuids = append(uuids, devID)
}
if len(ids) > 0 {
opts = append(opts, nvidia.WithDevices(ids...))
}
if len(uuids) > 0 {
opts = append(opts, nvidia.WithDeviceUUIDs(uuids...))
}
}
if req.Count < 0 {
opts = append(opts, nvidia.WithAllDevices)
s.Process.Env = append(s.Process.Env, "NVIDIA_VISIBLE_DEVICES="+strings.Join(req.DeviceIDs, ","))
} else if req.Count > 0 {
opts = append(opts, nvidia.WithDevices(countToDevices(req.Count)...))
s.Process.Env = append(s.Process.Env, "NVIDIA_VISIBLE_DEVICES="+countToDevices(req.Count))
} else if req.Count < 0 {
s.Process.Env = append(s.Process.Env, "NVIDIA_VISIBLE_DEVICES=all")
}
var nvidiaCaps []nvidia.Capability
var nvidiaCaps []string
// req.Capabilities contains device capabilities, some but not all are NVIDIA driver capabilities.
for _, c := range dev.selectedCaps {
nvcap := nvidia.Capability(c)
if _, isNvidiaCap := allNvidiaCaps[nvcap]; isNvidiaCap {
nvidiaCaps = append(nvidiaCaps, nvcap)
nvidiaCaps = append(nvidiaCaps, c)
continue
}
// TODO: nvidia.WithRequiredCUDAVersion
@ -91,17 +72,34 @@ func setNvidiaGPUs(s *specs.Spec, dev *deviceInstance) error {
}
if nvidiaCaps != nil {
opts = append(opts, nvidia.WithCapabilities(nvidiaCaps...))
s.Process.Env = append(s.Process.Env, "NVIDIA_DRIVER_CAPABILITIES="+strings.Join(nvidiaCaps, ","))
}
return nvidia.WithGPUs(opts...)(nil, nil, nil, s)
path, err := exec.LookPath(nvidiaHook)
if err != nil {
return err
}
if s.Hooks == nil {
s.Hooks = &specs.Hooks{}
}
s.Hooks.Prestart = append(s.Hooks.Prestart, specs.Hook{
Path: path,
Args: []string{
nvidiaHook,
"prestart",
},
Env: os.Environ(),
})
return nil
}
// countToDevices returns the list 0, 1, ... count-1 of deviceIDs.
func countToDevices(count int) []int {
devices := make([]int, count)
func countToDevices(count int) string {
devices := make([]string, count)
for i := range devices {
devices[i] = i
devices[i] = strconv.Itoa(i)
}
return devices
return strings.Join(devices, ",")
}