mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-24 13:05:17 +00:00
126 lines
2.9 KiB
Go
126 lines
2.9 KiB
Go
/*
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# Copyright (c) 2021, 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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"fmt"
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log "github.com/sirupsen/logrus"
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"gitlab.com/nvidia/cloud-native/container-toolkit/internal/lookup"
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)
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const (
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capabilityLabel = "capability"
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versionLabel = "version"
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)
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// mounts is a generic discoverer for Mounts. It is customized by specifying the
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// required entities as a key-value pair as well as a Locator that is used to
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// identify the mounts that are to be included.
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type mounts struct {
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None
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logger *log.Logger
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lookup lookup.Locator
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required map[string][]string
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}
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var _ Discover = (*mounts)(nil)
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func (d mounts) Mounts() ([]Mount, error) {
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mounts, err := d.uniqueMounts()
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if err != nil {
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return nil, fmt.Errorf("error discovering mounts: %v", err)
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}
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return mounts.Slice(), nil
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}
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func (d mounts) uniqueMounts() (mountsByPath, error) {
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if d.lookup == nil {
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return nil, fmt.Errorf("no lookup defined")
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}
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mounts := make(mountsByPath)
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for id, keys := range d.required {
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for _, key := range keys {
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d.logger.Debugf("Locating %v [%v]", key, id)
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located, err := d.lookup.Locate(key)
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if err != nil {
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d.logger.Warnf("Could not locate %v [%v]: %v", key, id, err)
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continue
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}
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d.logger.Infof("Located %v [%v]: %v", key, id, located)
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for _, p := range located {
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// TODO: We need to add labels
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mount := newMount(p)
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mounts.Put(mount)
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}
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}
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}
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return mounts, nil
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}
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type mountsByPath map[string]Mount
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func (m mountsByPath) Slice() []Mount {
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var mounts []Mount
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for _, mount := range m {
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mounts = append(mounts, mount)
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}
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return mounts
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}
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func (m *mountsByPath) Put(value Mount) {
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key := value.Path
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mount, exists := (*m)[key]
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if !exists {
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(*m)[key] = value
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return
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}
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for k, v := range value.Labels {
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mount.Labels[k] = v
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}
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(*m)[key] = mount
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}
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// NewMountForCapability creates a mount with the specified capability label
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func NewMountForCapability(path string, capability string) Mount {
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return newMount(path, capabilityLabel, capability)
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}
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// NewMountForVersion creates a mount with the specified version label
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func NewMountForVersion(path string, version string) Mount {
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return newMount(path, versionLabel, version)
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}
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func newMount(path string, labels ...string) Mount {
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l := make(map[string]string)
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for i := 0; i < len(labels)-1; i += 2 {
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l[labels[i]] = labels[i+1]
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}
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return Mount{
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Path: path,
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Labels: l,
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}
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}
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