8be340e37b
After some analysis, it was found that Content.Reader was generally redudant to an io.ReaderAt. This change removes `Content.Reader` in favor of a `Content.ReaderAt`. In general, `ReaderAt` can perform better over interfaces with indeterminant latency because it avoids remote state for reads. Where a reader is required, a helper is provided to convert it into an `io.SectionReader`. Signed-off-by: Stephen J Day <stephen.day@docker.com>
80 lines
1.8 KiB
Go
80 lines
1.8 KiB
Go
// +build windows
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package containerd
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import (
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"context"
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"encoding/json"
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"fmt"
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"github.com/containerd/containerd/containers"
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"github.com/containerd/containerd/content"
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"github.com/containerd/containerd/images"
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"github.com/containerd/containerd/typeurl"
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"github.com/opencontainers/image-spec/specs-go/v1"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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)
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func WithImageConfig(ctx context.Context, i Image) SpecOpts {
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return func(s *specs.Spec) error {
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var (
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image = i.(*image)
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store = image.client.ContentStore()
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)
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ic, err := image.i.Config(ctx, store)
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if err != nil {
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return err
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}
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var (
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ociimage v1.Image
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config v1.ImageConfig
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)
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switch ic.MediaType {
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case v1.MediaTypeImageConfig, images.MediaTypeDockerSchema2Config:
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p, err := content.ReadBlob(ctx, store, ic.Digest)
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if err != nil {
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return err
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}
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if err := json.Unmarshal(p, &ociimage); err != nil {
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return err
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}
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config = ociimage.Config
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default:
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return fmt.Errorf("unknown image config media type %s", ic.MediaType)
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}
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s.Process.Env = config.Env
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s.Process.Args = append(config.Entrypoint, config.Cmd...)
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s.Process.User = specs.User{
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Username: config.User,
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}
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return nil
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}
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}
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func WithTTY(width, height int) SpecOpts {
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return func(s *specs.Spec) error {
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s.Process.Terminal = true
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s.Process.ConsoleSize.Width = uint(width)
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s.Process.ConsoleSize.Height = uint(height)
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return nil
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}
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}
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func WithSpec(spec *specs.Spec) NewContainerOpts {
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return func(ctx context.Context, client *Client, c *containers.Container) error {
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any, err := typeurl.MarshalAny(spec)
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if err != nil {
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return err
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}
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c.Spec = any
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return nil
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}
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}
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func WithResources(resources *specs.WindowsResources) UpdateTaskOpts {
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return func(ctx context.Context, client *Client, r *UpdateTaskInfo) error {
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r.Resources = resources
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return nil
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}
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}
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