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
|
package specgen
import (
"path/filepath"
"strings"
"github.com/containers/common/pkg/parse"
spec "github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// NamedVolume holds information about a named volume that will be mounted into
// the container.
type NamedVolume struct {
// Name is the name of the named volume to be mounted. May be empty.
// If empty, a new named volume with a pseudorandomly generated name
// will be mounted at the given destination.
Name string
// Destination to mount the named volume within the container. Must be
// an absolute path. Path will be created if it does not exist.
Dest string
// Options are options that the named volume will be mounted with.
Options []string
}
// OverlayVolume holds information about a overlay volume that will be mounted into
// the container.
type OverlayVolume struct {
// Destination is the absolute path where the mount will be placed in the container.
Destination string `json:"destination"`
// Source specifies the source path of the mount.
Source string `json:"source,omitempty"`
}
// ImageVolume is a volume based on a container image. The container image is
// first mounted on the host and is then bind-mounted into the container. An
// ImageVolume is always mounted read only.
type ImageVolume struct {
// Source is the source of the image volume. The image can be referred
// to by name and by ID.
Source string
// Destination is the absolute path of the mount in the container.
Destination string
// ReadWrite sets the volume writable.
ReadWrite bool
}
// GenVolumeMounts parses user input into mounts, volumes and overlay volumes
func GenVolumeMounts(volumeFlag []string) (map[string]spec.Mount, map[string]*NamedVolume, map[string]*OverlayVolume, error) {
errDuplicateDest := errors.Errorf("duplicate mount destination")
mounts := make(map[string]spec.Mount)
volumes := make(map[string]*NamedVolume)
overlayVolumes := make(map[string]*OverlayVolume)
volumeFormatErr := errors.Errorf("incorrect volume format, should be [host-dir:]ctr-dir[:option]")
for _, vol := range volumeFlag {
var (
options []string
src string
dest string
err error
)
splitVol := strings.Split(vol, ":")
if len(splitVol) > 3 {
return nil, nil, nil, errors.Wrapf(volumeFormatErr, vol)
}
src = splitVol[0]
if len(splitVol) == 1 {
// This is an anonymous named volume. Only thing given
// is destination.
// Name/source will be blank, and populated by libpod.
src = ""
dest = splitVol[0]
} else if len(splitVol) > 1 {
dest = splitVol[1]
}
if len(splitVol) > 2 {
if options, err = parse.ValidateVolumeOpts(strings.Split(splitVol[2], ",")); err != nil {
return nil, nil, nil, err
}
}
// Do not check source dir for anonymous volumes
if len(splitVol) > 1 {
if len(src) == 0 {
return nil, nil, nil, errors.New("host directory cannot be empty")
}
}
if err := parse.ValidateVolumeCtrDir(dest); err != nil {
return nil, nil, nil, err
}
cleanDest := filepath.Clean(dest)
if strings.HasPrefix(src, "/") || strings.HasPrefix(src, ".") {
// This is not a named volume
overlayFlag := false
for _, o := range options {
if o == "O" {
overlayFlag = true
if len(options) > 1 {
return nil, nil, nil, errors.New("can't use 'O' with other options")
}
}
}
if overlayFlag {
// This is a overlay volume
newOverlayVol := new(OverlayVolume)
newOverlayVol.Destination = cleanDest
newOverlayVol.Source = src
if _, ok := overlayVolumes[newOverlayVol.Destination]; ok {
return nil, nil, nil, errors.Wrapf(errDuplicateDest, newOverlayVol.Destination)
}
overlayVolumes[newOverlayVol.Destination] = newOverlayVol
} else {
newMount := spec.Mount{
Destination: cleanDest,
Type: "bind",
Source: src,
Options: options,
}
if _, ok := mounts[newMount.Destination]; ok {
return nil, nil, nil, errors.Wrapf(errDuplicateDest, newMount.Destination)
}
mounts[newMount.Destination] = newMount
}
} else {
// This is a named volume
newNamedVol := new(NamedVolume)
newNamedVol.Name = src
newNamedVol.Dest = cleanDest
newNamedVol.Options = options
if _, ok := volumes[newNamedVol.Dest]; ok {
return nil, nil, nil, errors.Wrapf(errDuplicateDest, newNamedVol.Dest)
}
volumes[newNamedVol.Dest] = newNamedVol
}
logrus.Debugf("User mount %s:%s options %v", src, dest, options)
}
return mounts, volumes, overlayVolumes, nil
}
|
