-
Notifications
You must be signed in to change notification settings - Fork 213
/
names.go
112 lines (97 loc) · 2.65 KB
/
names.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
package daemon
import (
"fmt"
"strings"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/names"
"github.com/docker/docker/pkg/namesgenerator"
"github.com/docker/docker/pkg/stringid"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
var (
validContainerNameChars = names.RestrictedNameChars
validContainerNamePattern = names.RestrictedNamePattern
)
func (daemon *Daemon) registerName(container *container.Container) error {
if daemon.Exists(container.ID) {
return fmt.Errorf("Container is already loaded")
}
if err := validateID(container.ID); err != nil {
return err
}
if container.Name == "" {
name, err := daemon.generateNewName(container.ID)
if err != nil {
return err
}
container.Name = name
}
return daemon.containersReplica.ReserveName(container.Name, container.ID)
}
func (daemon *Daemon) generateIDAndName(name string) (string, string, error) {
var (
err error
id = stringid.GenerateNonCryptoID()
)
if name == "" {
if name, err = daemon.generateNewName(id); err != nil {
return "", "", err
}
return id, name, nil
}
if name, err = daemon.reserveName(id, name); err != nil {
return "", "", err
}
return id, name, nil
}
func (daemon *Daemon) reserveName(id, name string) (string, error) {
if !validContainerNamePattern.MatchString(strings.TrimPrefix(name, "/")) {
return "", validationError{errors.Errorf("Invalid container name (%s), only %s are allowed", name, validContainerNameChars)}
}
if name[0] != '/' {
name = "/" + name
}
if err := daemon.containersReplica.ReserveName(name, id); err != nil {
if err == container.ErrNameReserved {
id, err := daemon.containersReplica.Snapshot().GetID(name)
if err != nil {
logrus.Errorf("got unexpected error while looking up reserved name: %v", err)
return "", err
}
return "", nameConflictError{id: id, name: name}
}
return "", errors.Wrapf(err, "error reserving name: %q", name)
}
return name, nil
}
func (daemon *Daemon) releaseName(name string) {
daemon.containersReplica.ReleaseName(name)
}
func (daemon *Daemon) generateNewName(id string) (string, error) {
var name string
for i := 0; i < 6; i++ {
name = namesgenerator.GetRandomName(i)
if name[0] != '/' {
name = "/" + name
}
if err := daemon.containersReplica.ReserveName(name, id); err != nil {
if err == container.ErrNameReserved {
continue
}
return "", err
}
return name, nil
}
name = "/" + stringid.TruncateID(id)
if err := daemon.containersReplica.ReserveName(name, id); err != nil {
return "", err
}
return name, nil
}
func validateID(id string) error {
if id == "" {
return fmt.Errorf("Invalid empty id")
}
return nil
}