mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-26 13:59:45 +00:00
239b6d3739
This change enables the experimental mode of the NVIDIA Container Runtime. If enabled, the nvidia-container-runtime.discover-mode config option is queried to determine how required OCI spec modifications should be defined. If "legacy" is selected, the existing NVIDIA Container Runtime hooks is discovered and injected into the OCI spec. Signed-off-by: Evan Lezar <elezar@nvidia.com>
74 lines
2.2 KiB
Go
74 lines
2.2 KiB
Go
/**
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# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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**/
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package discover
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import (
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"github.com/NVIDIA/nvidia-container-toolkit/internal/lookup"
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"github.com/container-orchestrated-devices/container-device-interface/pkg/cdi"
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"github.com/sirupsen/logrus"
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)
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type legacy struct {
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logger *logrus.Logger
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lookup lookup.Locator
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}
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const (
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nvidiaContainerRuntimeHookExecutable = "nvidia-container-runtime-hook"
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hookDefaultFilePath = "/usr/bin/nvidia-container-runtime-hook"
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)
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var _ Discover = (*legacy)(nil)
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// NewLegacyDiscoverer creates a discoverer for the legacy runtime
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func NewLegacyDiscoverer(logger *logrus.Logger, root string) (Discover, error) {
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d := legacy{
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logger: logger,
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lookup: lookup.NewPathLocator(logger, root),
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}
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return &d, nil
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}
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// Hooks returns the "legacy" NVIDIA Container Runtime hook. This hook calls out
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// to the nvidia-container-cli to make modifications to the container as defined
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// in libnvidia-container.
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func (d legacy) Hooks() ([]Hook, error) {
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var hooks []Hook
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hookPath := hookDefaultFilePath
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targets, err := d.lookup.Locate(nvidiaContainerRuntimeHookExecutable)
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if err != nil {
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d.logger.Warnf("Failed to locate %v: %v", nvidiaContainerRuntimeHookExecutable, err)
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} else if len(targets) == 0 {
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d.logger.Warnf("%v not found", nvidiaContainerRuntimeHookExecutable)
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} else {
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d.logger.Debugf("Found %v candidates: %v", nvidiaContainerRuntimeHookExecutable, targets)
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hookPath = targets[0]
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}
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d.logger.Debugf("Using NVIDIA Container Runtime Hook path %v", hookPath)
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args := []string{hookPath, "prestart"}
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legacyHook := Hook{
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Lifecycle: cdi.PrestartHook,
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Path: hookPath,
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Args: args,
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}
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hooks = append(hooks, legacyHook)
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return hooks, nil
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}
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