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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
package drivers // import "github.com/docker/docker/volume/drivers"
import (
"errors"
"strings"
"time"
"github.com/docker/docker/volume"
"github.com/sirupsen/logrus"
)
var (
errNoSuchVolume = errors.New("no such volume")
)
type volumeDriverAdapter struct {
name string
scopePath func(s string) string
capabilities *volume.Capability
proxy volumeDriver
}
func (a *volumeDriverAdapter) Name() string {
return a.name
}
func (a *volumeDriverAdapter) Create(name string, opts map[string]string) (volume.Volume, error) {
if err := a.proxy.Create(name, opts); err != nil {
return nil, err
}
return &volumeAdapter{
proxy: a.proxy,
name: name,
driverName: a.name,
scopePath: a.scopePath,
}, nil
}
func (a *volumeDriverAdapter) Remove(v volume.Volume) error {
return a.proxy.Remove(v.Name())
}
func (a *volumeDriverAdapter) List() ([]volume.Volume, error) {
ls, err := a.proxy.List()
if err != nil {
return nil, err
}
var out []volume.Volume
for _, vp := range ls {
out = append(out, &volumeAdapter{
proxy: a.proxy,
name: vp.Name,
scopePath: a.scopePath,
driverName: a.name,
eMount: a.scopePath(vp.Mountpoint),
})
}
return out, nil
}
func (a *volumeDriverAdapter) Get(name string) (volume.Volume, error) {
v, err := a.proxy.Get(name)
if err != nil {
return nil, err
}
// plugin may have returned no volume and no error
if v == nil {
return nil, errNoSuchVolume
}
return &volumeAdapter{
proxy: a.proxy,
name: v.Name,
driverName: a.Name(),
eMount: v.Mountpoint,
createdAt: v.CreatedAt,
status: v.Status,
scopePath: a.scopePath,
}, nil
}
func (a *volumeDriverAdapter) Scope() string {
cap := a.getCapabilities()
return cap.Scope
}
func (a *volumeDriverAdapter) getCapabilities() volume.Capability {
if a.capabilities != nil {
return *a.capabilities
}
cap, err := a.proxy.Capabilities()
if err != nil {
// `GetCapabilities` is a not a required endpoint.
// On error assume it's a local-only driver
logrus.WithError(err).WithField("driver", a.name).Debug("Volume driver returned an error while trying to query its capabilities, using default capabilities")
return volume.Capability{Scope: volume.LocalScope}
}
// don't spam the warn log below just because the plugin didn't provide a scope
if len(cap.Scope) == 0 {
cap.Scope = volume.LocalScope
}
cap.Scope = strings.ToLower(cap.Scope)
if cap.Scope != volume.LocalScope && cap.Scope != volume.GlobalScope {
logrus.WithField("driver", a.Name()).WithField("scope", a.Scope).Warn("Volume driver returned an invalid scope")
cap.Scope = volume.LocalScope
}
a.capabilities = &cap
return cap
}
type volumeAdapter struct {
proxy volumeDriver
name string
scopePath func(string) string
driverName string
eMount string // ephemeral host volume path
createdAt time.Time // time the directory was created
status map[string]interface{}
}
type proxyVolume struct {
Name string
Mountpoint string
CreatedAt time.Time
Status map[string]interface{}
}
func (a *volumeAdapter) Name() string {
return a.name
}
func (a *volumeAdapter) DriverName() string {
return a.driverName
}
func (a *volumeAdapter) Path() string {
if len(a.eMount) == 0 {
mountpoint, _ := a.proxy.Path(a.name)
a.eMount = a.scopePath(mountpoint)
}
return a.eMount
}
func (a *volumeAdapter) CachedPath() string {
return a.eMount
}
func (a *volumeAdapter) Mount(id string) (string, error) {
mountpoint, err := a.proxy.Mount(a.name, id)
a.eMount = a.scopePath(mountpoint)
return a.eMount, err
}
func (a *volumeAdapter) Unmount(id string) error {
err := a.proxy.Unmount(a.name, id)
if err == nil {
a.eMount = ""
}
return err
}
func (a *volumeAdapter) CreatedAt() (time.Time, error) {
return a.createdAt, nil
}
func (a *volumeAdapter) Status() map[string]interface{} {
out := make(map[string]interface{}, len(a.status))
for k, v := range a.status {
out[k] = v
}
return out
}
|
