120 lines
3.2 KiB
Go
120 lines
3.2 KiB
Go
/*
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Copyright The containerd Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 opts
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import (
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"context"
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"fmt"
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"os"
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"path/filepath"
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"sort"
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runtimespec "github.com/opencontainers/runtime-spec/specs-go"
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runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
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"github.com/containerd/containerd/containers"
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"github.com/containerd/containerd/oci"
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osinterface "github.com/containerd/containerd/pkg/os"
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)
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// WithDarwinMounts adds mounts from CRI's container config + extra mounts.
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func WithDarwinMounts(osi osinterface.OS, config *runtime.ContainerConfig, extra []*runtime.Mount) oci.SpecOpts {
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return func(ctx context.Context, client oci.Client, container *containers.Container, s *oci.Spec) error {
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// mergeMounts merge CRI mounts with extra mounts. If a mount destination
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// is mounted by both a CRI mount and an extra mount, the CRI mount will
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// be kept.
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var (
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criMounts = config.GetMounts()
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mounts = append([]*runtime.Mount{}, criMounts...)
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)
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// Copy all mounts from extra mounts, except for mounts overridden by CRI.
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for _, e := range extra {
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found := false
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for _, c := range criMounts {
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if cleanMount(e.ContainerPath) == cleanMount(c.ContainerPath) {
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found = true
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break
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}
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}
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if !found {
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mounts = append(mounts, e)
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}
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}
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// Sort mounts in number of parts. This ensures that high level mounts don't
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// shadow other mounts.
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sort.Sort(orderedMounts(mounts))
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// Copy all mounts from default mounts, except for
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// - mounts overridden by supplied mount;
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mountSet := make(map[string]struct{})
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for _, m := range mounts {
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mountSet[filepath.Clean(m.ContainerPath)] = struct{}{}
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}
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defaultMounts := s.Mounts
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s.Mounts = nil
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for _, m := range defaultMounts {
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dst := cleanMount(m.Destination)
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if _, ok := mountSet[dst]; ok {
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// filter out mount overridden by a supplied mount
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continue
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}
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s.Mounts = append(s.Mounts, m)
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}
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for _, mount := range mounts {
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var (
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dst = mount.GetContainerPath()
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src = mount.GetHostPath()
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)
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// Create the host path if it doesn't exist.
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if _, err := osi.Stat(src); err != nil {
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if !os.IsNotExist(err) {
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return fmt.Errorf("failed to stat %q: %w", src, err)
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}
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if err := osi.MkdirAll(src, 0755); err != nil {
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return fmt.Errorf("failed to mkdir %q: %w", src, err)
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}
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}
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src, err := osi.ResolveSymbolicLink(src)
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if err != nil {
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return fmt.Errorf("failed to resolve symlink %q: %w", src, err)
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}
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var options []string
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if mount.GetReadonly() {
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options = append(options, "ro")
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} else {
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options = append(options, "rw")
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}
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s.Mounts = append(s.Mounts, runtimespec.Mount{
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Source: src,
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Destination: dst,
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Type: "bind",
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Options: options,
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})
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}
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return nil
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}
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}
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