mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-23 00:38:26 +00:00
118 lines
4.0 KiB
Go
118 lines
4.0 KiB
Go
/**
|
|
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
**/
|
|
|
|
package modifier
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/NVIDIA/nvidia-container-toolkit/internal/config"
|
|
"github.com/NVIDIA/nvidia-container-toolkit/internal/discover"
|
|
"github.com/NVIDIA/nvidia-container-toolkit/internal/discover/csv"
|
|
"github.com/NVIDIA/nvidia-container-toolkit/internal/edits"
|
|
"github.com/NVIDIA/nvidia-container-toolkit/internal/oci"
|
|
"github.com/opencontainers/runtime-spec/specs-go"
|
|
"github.com/sirupsen/logrus"
|
|
)
|
|
|
|
// experiemental represents the modifications required by the experimental runtime
|
|
type experimental struct {
|
|
logger *logrus.Logger
|
|
discoverer discover.Discover
|
|
}
|
|
|
|
const (
|
|
visibleDevicesEnvvar = "NVIDIA_VISIBLE_DEVICES"
|
|
visibleDevicesVoid = "void"
|
|
|
|
nvidiaRequireJetpackEnvvar = "NVIDIA_REQUIRE_JETPACK"
|
|
)
|
|
|
|
// NewExperimentalModifier creates a modifier that applies the experimental
|
|
// modications to an OCI spec if required by the runtime wrapper.
|
|
func NewExperimentalModifier(logger *logrus.Logger, cfg *config.Config, ociSpec oci.Spec) (oci.SpecModifier, error) {
|
|
if err := ociSpec.Load(); err != nil {
|
|
return nil, fmt.Errorf("failed to load OCI spec: %v", err)
|
|
}
|
|
|
|
// In experimental mode, we check whether a modification is required at all and return the lowlevelRuntime directly
|
|
// if no modification is required.
|
|
visibleDevices, exists := ociSpec.LookupEnv(visibleDevicesEnvvar)
|
|
if !exists || visibleDevices == "" || visibleDevices == visibleDevicesVoid {
|
|
logger.Infof("No modification required: %v=%v (exists=%v)", visibleDevicesEnvvar, visibleDevices, exists)
|
|
return nil, nil
|
|
}
|
|
logger.Infof("Constructing modifier from config: %+v", cfg)
|
|
|
|
root := cfg.NVIDIAContainerCLIConfig.Root
|
|
|
|
var d discover.Discover
|
|
switch cfg.NVIDIAContainerRuntimeConfig.DiscoverMode {
|
|
case "legacy":
|
|
legacyDiscoverer, err := discover.NewLegacyDiscoverer(logger, root)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to create legacy discoverer: %v", err)
|
|
}
|
|
d = legacyDiscoverer
|
|
case "csv":
|
|
csvFiles, err := csv.GetFileList(csv.DefaultMountSpecPath)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to get list of CSV files: %v", err)
|
|
}
|
|
|
|
nvidiaRequireJetpack, _ := ociSpec.LookupEnv(nvidiaRequireJetpackEnvvar)
|
|
if nvidiaRequireJetpack != "csv-mounts=all" {
|
|
csvFiles = csv.BaseFilesOnly(csvFiles)
|
|
}
|
|
|
|
csvDiscoverer, err := discover.NewFromCSVFiles(logger, csvFiles, root)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to create CSV discoverer: %v", err)
|
|
}
|
|
d = csvDiscoverer
|
|
default:
|
|
return nil, fmt.Errorf("invalid discover mode: %v", cfg.NVIDIAContainerRuntimeConfig.DiscoverMode)
|
|
}
|
|
|
|
return newExperimentalModifierFromDiscoverer(logger, d)
|
|
}
|
|
|
|
// newExperimentalModifierFromDiscoverer created a modifier that aplies the discovered
|
|
// modifications to an OCI spec if require by the runtime wrapper.
|
|
func newExperimentalModifierFromDiscoverer(logger *logrus.Logger, d discover.Discover) (oci.SpecModifier, error) {
|
|
m := experimental{
|
|
logger: logger,
|
|
discoverer: d,
|
|
}
|
|
return &m, nil
|
|
}
|
|
|
|
// Modify applies the required modifications to the incomming OCI spec. These modifications
|
|
// are applied in-place.
|
|
func (m experimental) Modify(spec *specs.Spec) error {
|
|
err := nvidiaContainerRuntimeHookRemover{m.logger}.Modify(spec)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to remove existing hooks: %v", err)
|
|
}
|
|
|
|
specEdits, err := edits.NewSpecEdits(m.logger, m.discoverer)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to get required container edits: %v", err)
|
|
}
|
|
|
|
return specEdits.Modify(spec)
|
|
}
|