func runExport(cmd *cobra.Command, args []string) (exit int) {
if len(args) != 2 {
cmd.Usage()
return 1
}
outACI := args[1]
ext := filepath.Ext(outACI)
if ext != schema.ACIExtension {
stderr.Printf("extension must be %s (given %s)", schema.ACIExtension, outACI)
return 1
}
p, err := getPodFromUUIDString(args[0])
if err != nil {
stderr.PrintE("problem retrieving pod", err)
return 1
}
defer p.Close()
if !p.isExited {
stderr.Print("pod is not exited. Only exited pods can be exported")
return 1
}
app, err := getApp(p)
if err != nil {
stderr.PrintE("unable to find app", err)
return 1
}
root := common.AppPath(p.path(), app.Name)
manifestPath := filepath.Join(common.AppInfoPath(p.path(), app.Name), aci.ManifestFile)
if p.usesOverlay() {
tmpDir := filepath.Join(getDataDir(), "tmp")
if err := os.MkdirAll(tmpDir, common.DefaultRegularDirPerm); err != nil {
stderr.PrintE("unable to create temp directory", err)
return 1
}
podDir, err := ioutil.TempDir(tmpDir, fmt.Sprintf("rkt-export-%s", p.uuid))
if err != nil {
stderr.PrintE("unable to create export temp directory", err)
return 1
}
defer func() {
if err := os.RemoveAll(podDir); err != nil {
stderr.PrintE("problem removing temp directory", err)
exit = 1
}
}()
mntDir := filepath.Join(podDir, "rootfs")
if err := os.Mkdir(mntDir, common.DefaultRegularDirPerm); err != nil {
stderr.PrintE("unable to create rootfs directory inside temp directory", err)
return 1
}
if err := mountOverlay(p, app, mntDir); err != nil {
stderr.PrintE(fmt.Sprintf("couldn't mount directory at %s", mntDir), err)
return 1
}
defer func() {
if err := syscall.Unmount(mntDir, 0); err != nil {
stderr.PrintE(fmt.Sprintf("error unmounting directory %s", mntDir), err)
exit = 1
}
}()
root = podDir
} else {
hasMPs, err := appHasMountpoints(p.path(), app.Name)
if err != nil {
stderr.PrintE("error parsing mountpoints", err)
return 1
}
if hasMPs {
stderr.Printf("pod has remaining mountpoints. Only pods using overlayfs or with no mountpoints can be exported")
return 1
}
}
// Check for user namespace (--private-user), if in use get uidRange
var uidRange *user.UidRange
privUserFile := filepath.Join(p.path(), common.PrivateUsersPreparedFilename)
privUserContent, err := ioutil.ReadFile(privUserFile)
if err == nil {
uidRange = user.NewBlankUidRange()
// The file was found, save uid & gid shift and count
if err := uidRange.Deserialize(privUserContent); err != nil {
stderr.PrintE(fmt.Sprintf("problem deserializing the content of %s", common.PrivateUsersPreparedFilename), err)
return 1
}
}
if err = buildAci(root, manifestPath, outACI, uidRange); err != nil {
stderr.PrintE("error building aci", err)
return 1
}
return 0
}
