43 lines
1,021 B
Go
43 lines
1,021 B
Go
package container
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"github.com/docker/docker/pkg/archive"
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)
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const (
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// DefaultTarballPath holds the default path for the embedded tarball.
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DefaultTarballPath = "image.tar"
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)
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// UnpackRootfs unpacks the embedded tarball to the rootfs.
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func (c *Container) UnpackRootfs(rootfsDir string, asset func(string) ([]byte, error)) error {
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// Make the rootfs directory.
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if err := os.MkdirAll(rootfsDir, 0755); err != nil {
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return err
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}
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// Get the embedded tarball.
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data, err := asset(DefaultTarballPath)
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if err != nil {
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return fmt.Errorf("getting bindata asset image.tar failed: %v", err)
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}
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// Unpack the tarball.
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r := bytes.NewReader(data)
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if err := archive.Untar(r, rootfsDir, &archive.TarOptions{NoLchown: true}); err != nil {
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return err
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}
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// Write a resolv.conf.
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if err := ioutil.WriteFile(filepath.Join(rootfsDir, "etc", "resolv.conf"), []byte("nameserver 8.8.8.8\nnameserver 8.8.4.4"), 0755); err != nil {
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return err
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}
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return nil
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}
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