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
|
package main
import (
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"os"
"github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"github.com/projectatomic/libpod/cmd/podman/libpodruntime"
"github.com/projectatomic/libpod/libpod/image"
"github.com/projectatomic/libpod/pkg/util"
"github.com/urfave/cli"
)
var (
importFlags = []cli.Flag{
cli.StringSliceFlag{
Name: "change, c",
Usage: "Apply the following possible instructions to the created image (default []): CMD | ENTRYPOINT | ENV | EXPOSE | LABEL | STOPSIGNAL | USER | VOLUME | WORKDIR",
},
cli.StringFlag{
Name: "message, m",
Usage: "Set commit message for imported image",
},
cli.BoolFlag{
Name: "quiet, q",
Usage: "Suppress output",
},
}
importDescription = `Create a container image from the contents of the specified tarball (.tar, .tar.gz, .tgz, .bzip, .tar.xz, .txz).
Note remote tar balls can be specified, via web address.
Optionally tag the image. You can specify the instructions using the --change option.
`
importCommand = cli.Command{
Name: "import",
Usage: "Import a tarball to create a filesystem image",
Description: importDescription,
Flags: importFlags,
Action: importCmd,
ArgsUsage: "TARBALL [REFERENCE]",
}
)
func importCmd(c *cli.Context) error {
if err := validateFlags(c, importFlags); err != nil {
return err
}
runtime, err := libpodruntime.GetRuntime(c)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
var (
source string
reference string
writer io.Writer
)
args := c.Args()
switch len(args) {
case 0:
return errors.Errorf("need to give the path to the tarball, or must specify a tarball of '-' for stdin")
case 1:
source = args[0]
case 2:
source = args[0]
reference = args[1]
default:
return errors.Errorf("too many arguments. Usage TARBALL [REFERENCE]")
}
if err := validateFileName(source); err != nil {
return err
}
changes := v1.ImageConfig{}
if c.IsSet("change") {
changes, err = util.GetImageConfig(c.StringSlice("change"))
if err != nil {
return errors.Wrapf(err, "error adding config changes to image %q", source)
}
}
history := []v1.History{
{Comment: c.String("message")},
}
config := v1.Image{
Config: changes,
History: history,
}
writer = nil
if !c.Bool("quiet") {
writer = os.Stderr
}
// if source is a url, download it and save to a temp file
u, err := url.ParseRequestURI(source)
if err == nil && u.Scheme != "" {
file, err := downloadFromURL(source)
if err != nil {
return err
}
defer os.Remove(file)
source = file
}
newImage, err := runtime.ImageRuntime().Import(getContext(), source, reference, writer, image.SigningOptions{}, config)
if err == nil {
fmt.Println(newImage.ID())
}
return err
}
// donwloadFromURL downloads an image in the format "https:/example.com/myimage.tar"
// and tempoarily saves in it /var/tmp/importxyz, which is deleted after the image is imported
func downloadFromURL(source string) (string, error) {
fmt.Printf("Downloading from %q\n", source)
outFile, err := ioutil.TempFile("/var/tmp", "import")
if err != nil {
return "", errors.Wrap(err, "error creating file")
}
defer outFile.Close()
response, err := http.Get(source)
if err != nil {
return "", errors.Wrapf(err, "error downloading %q", source)
}
defer response.Body.Close()
_, err = io.Copy(outFile, response.Body)
if err != nil {
return "", errors.Wrapf(err, "error saving %q to %q", source, outFile)
}
return outFile.Name(), nil
}
|
