30f1b651e2
Use strongly typed errors to set HTTP status codes. Error interfaces are defined in the api/errors package and errors returned from controllers are checked against these interfaces. Errors can be wraeped in a pkg/errors.Causer, as long as somewhere in the line of causes one of the interfaces is implemented. The special error interfaces take precedence over Causer, meaning if both Causer and one of the new error interfaces are implemented, the Causer is not traversed. Signed-off-by: Brian Goff <cpuguy83@gmail.com> Upstream-commit: ebcb7d6b406fe50ea9a237c73004d75884184c33 Component: engine
113 lines
2.8 KiB
Go
113 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/api"
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"github.com/docker/docker/container"
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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 = api.RestrictedNameChars
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validContainerNamePattern = api.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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