112 lines
2.8 KiB
Go
112 lines
2.8 KiB
Go
package daemon
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import (
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"fmt"
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"strings"
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"github.com/docker/docker/container"
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"github.com/docker/docker/daemon/names"
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"github.com/docker/docker/pkg/namesgenerator"
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"github.com/docker/docker/pkg/stringid"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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)
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var (
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validContainerNameChars = names.RestrictedNameChars
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validContainerNamePattern = names.RestrictedNamePattern
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)
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func (daemon *Daemon) registerName(container *container.Container) error {
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if daemon.Exists(container.ID) {
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return fmt.Errorf("Container is already loaded")
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}
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if err := validateID(container.ID); err != nil {
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return err
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}
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if container.Name == "" {
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name, err := daemon.generateNewName(container.ID)
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if err != nil {
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return err
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}
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container.Name = name
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}
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return daemon.containersReplica.ReserveName(container.Name, container.ID)
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}
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func (daemon *Daemon) generateIDAndName(name string) (string, string, error) {
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var (
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err error
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id = stringid.GenerateNonCryptoID()
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)
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if name == "" {
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if name, err = daemon.generateNewName(id); err != nil {
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return "", "", err
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}
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return id, name, nil
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}
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if name, err = daemon.reserveName(id, name); err != nil {
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return "", "", err
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}
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return id, name, nil
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}
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func (daemon *Daemon) reserveName(id, name string) (string, error) {
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if !validContainerNamePattern.MatchString(strings.TrimPrefix(name, "/")) {
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return "", validationError{errors.Errorf("Invalid container name (%s), only %s are allowed", name, validContainerNameChars)}
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}
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if name[0] != '/' {
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name = "/" + name
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}
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if err := daemon.containersReplica.ReserveName(name, id); err != nil {
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if err == container.ErrNameReserved {
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id, err := daemon.containersReplica.Snapshot().GetID(name)
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if err != nil {
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logrus.Errorf("got unexpected error while looking up reserved name: %v", err)
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return "", err
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}
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return "", validationError{errors.Errorf("Conflict. The container name %q is already in use by container %q. You have to remove (or rename) that container to be able to reuse that name.", name, id)}
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}
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return "", errors.Wrapf(err, "error reserving name: %q", name)
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}
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return name, nil
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}
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func (daemon *Daemon) releaseName(name string) {
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daemon.containersReplica.ReleaseName(name)
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}
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func (daemon *Daemon) generateNewName(id string) (string, error) {
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var name string
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for i := 0; i < 6; i++ {
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name = namesgenerator.GetRandomName(i)
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if name[0] != '/' {
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name = "/" + name
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}
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if err := daemon.containersReplica.ReserveName(name, id); err != nil {
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if err == container.ErrNameReserved {
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continue
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}
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return "", err
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}
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return name, nil
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}
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name = "/" + stringid.TruncateID(id)
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if err := daemon.containersReplica.ReserveName(name, id); err != nil {
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return "", err
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}
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return name, nil
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}
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func validateID(id string) error {
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if id == "" {
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return fmt.Errorf("Invalid empty id")
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}
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return nil
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}
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