mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-23 00:38:26 +00:00
84 lines
2.6 KiB
Go
84 lines
2.6 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 modifier
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import (
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"fmt"
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"path/filepath"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/oci"
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"github.com/opencontainers/runtime-spec/specs-go"
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"github.com/sirupsen/logrus"
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)
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// nvidiaContainerRuntimeHookRemover is a spec modifer that detects and removes inserted nvidia-container-runtime hooks
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type nvidiaContainerRuntimeHookRemover struct {
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logger *logrus.Logger
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}
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var _ oci.SpecModifier = (*nvidiaContainerRuntimeHookRemover)(nil)
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// Modify removes any NVIDIA Container Runtime hooks from the provided spec
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func (m nvidiaContainerRuntimeHookRemover) Modify(spec *specs.Spec) error {
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if spec == nil {
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return nil
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}
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if spec.Hooks == nil {
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return nil
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}
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if len(spec.Hooks.Prestart) == 0 {
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return nil
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}
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var updateRequired bool
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newPrestart := make([]specs.Hook, 0, len(spec.Hooks.Prestart))
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for _, hook := range spec.Hooks.Prestart {
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if isNVIDIAContainerRuntimeHook(&hook) {
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m.logger.Warnf("Found existing NVIDIA Container Runtime Hook: %v", hook)
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updateRequired = true
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continue
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}
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newPrestart = append(newPrestart, hook)
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}
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if updateRequired {
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// TODO: Once we have updated the hook implementation to give an error if invoked incorrectly, we will update the spec hooks here instead of just logging.
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// We can then also use a boolean to track whether this is required instead of storing the removed hooks
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// spec.Hooks.Prestart = newPrestart
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m.logger.Debugf("Updating 'prestart' hooks to %v", newPrestart)
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return fmt.Errorf("spec already contains required 'prestart' hook")
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}
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return nil
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}
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// isNVIDIAContainerRuntimeHook checks if the provided hook is an nvidia-container-runtime-hook
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// or nvidia-container-toolkit hook. These are included, for example, by the non-experimental
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// nvidia-container-runtime or docker when specifying the --gpus flag.
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func isNVIDIAContainerRuntimeHook(hook *specs.Hook) bool {
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lookFor := map[string]bool{
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nvidiaContainerRuntimeHookExecutable: true,
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nvidiaContainerToolkitExecutable: true,
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}
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base := filepath.Base(hook.Path)
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return lookFor[base]
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}
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