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// +build linux
package libpod
import (
"context"
"github.com/containers/libpod/libpod/image"
"github.com/opencontainers/runtime-tools/generate"
)
const (
// IDTruncLength is the length of the pod's id that will be used to make the
// pause container name
IDTruncLength = 12
)
func (r *Runtime) makePauseContainer(ctx context.Context, p *Pod, imgName, imgID string) (*Container, error) {
// Set up generator for pause container defaults
g, err := generate.New("linux")
if err != nil {
return nil, err
}
g.SetRootReadonly(true)
g.SetProcessArgs([]string{r.config.PauseCommand})
containerName := p.ID()[:IDTruncLength] + "-infra"
var options []CtrCreateOption
options = append(options, r.WithPod(p))
options = append(options, WithRootFSFromImage(imgID, imgName, false))
options = append(options, WithName(containerName))
options = append(options, withIsPause())
return r.newContainer(ctx, g.Config, options...)
}
// createPauseContainer wrap creates a pause container for a pod.
// A pause container becomes the basis for kernel namespace sharing between
// containers in the pod.
func (r *Runtime) createPauseContainer(ctx context.Context, p *Pod) (*Container, error) {
if !r.valid {
return nil, ErrRuntimeStopped
}
newImage, err := r.ImageRuntime().New(ctx, r.config.PauseImage, "", "", nil, nil, image.SigningOptions{}, false, false)
if err != nil {
return nil, err
}
data, err := newImage.Inspect(ctx)
if err != nil {
return nil, err
}
imageName := newImage.Names()[0]
imageID := data.ID
return r.makePauseContainer(ctx, p, imageName, imageID)
}
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