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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
package image
import (
"fmt"
"io"
"os"
"strings"
cp "github.com/containers/image/copy"
"github.com/containers/image/directory"
"github.com/containers/image/docker"
dockerarchive "github.com/containers/image/docker/archive"
"github.com/containers/image/docker/tarfile"
ociarchive "github.com/containers/image/oci/archive"
"github.com/containers/image/pkg/sysregistries"
is "github.com/containers/image/storage"
"github.com/containers/image/tarball"
"github.com/containers/image/transports/alltransports"
"github.com/containers/image/types"
"github.com/pkg/errors"
)
var (
// DockerArchive is the transport we prepend to an image name
// when saving to docker-archive
DockerArchive = dockerarchive.Transport.Name()
// OCIArchive is the transport we prepend to an image name
// when saving to oci-archive
OCIArchive = ociarchive.Transport.Name()
// DirTransport is the transport for pushing and pulling
// images to and from a directory
DirTransport = directory.Transport.Name()
// TransportNames are the supported transports in string form
TransportNames = [...]string{DefaultTransport, DockerArchive, OCIArchive, "ostree:", "dir:"}
// TarballTransport is the transport for importing a tar archive
// and creating a filesystem image
TarballTransport = tarball.Transport.Name()
// DockerTransport is the transport for docker registries
DockerTransport = docker.Transport.Name() + "://"
// AtomicTransport is the transport for atomic registries
AtomicTransport = "atomic"
// DefaultTransport is a prefix that we apply to an image name
DefaultTransport = DockerTransport
)
type pullStruct struct {
image string
srcRef types.ImageReference
dstRef types.ImageReference
}
func (ir *Runtime) getPullStruct(srcRef types.ImageReference, destName string) (*pullStruct, error) {
reference := destName
if srcRef.DockerReference() != nil {
reference = srcRef.DockerReference().String()
}
destRef, err := is.Transport.ParseStoreReference(ir.store, reference)
if err != nil {
return nil, errors.Errorf("error parsing dest reference name: %v", err)
}
return &pullStruct{
image: destName,
srcRef: srcRef,
dstRef: destRef,
}, nil
}
// returns a list of pullStruct with the srcRef and DstRef based on the transport being used
func (ir *Runtime) getPullListFromRef(srcRef types.ImageReference, imgName string, sc *types.SystemContext) ([]*pullStruct, error) {
var pullStructs []*pullStruct
splitArr := strings.Split(imgName, ":")
archFile := splitArr[len(splitArr)-1]
// supports pulling from docker-archive, oci, and registries
if srcRef.Transport().Name() == DockerArchive {
tarSource, err := tarfile.NewSourceFromFile(archFile)
if err != nil {
return nil, err
}
manifest, err := tarSource.LoadTarManifest()
if err != nil {
return nil, errors.Errorf("error retrieving manifest.json: %v", err)
}
// to pull the first image stored in the tar file
if len(manifest) == 0 {
// use the hex of the digest if no manifest is found
reference, err := getImageDigest(srcRef, sc)
if err != nil {
return nil, err
}
pullInfo, err := ir.getPullStruct(srcRef, reference)
if err != nil {
return nil, err
}
pullStructs = append(pullStructs, pullInfo)
} else {
var dest string
if len(manifest[0].RepoTags) > 0 {
dest = manifest[0].RepoTags[0]
} else {
// If the input image has no repotags, we need to feed it a dest anyways
dest, err = getImageDigest(srcRef, sc)
if err != nil {
return nil, err
}
}
pullInfo, err := ir.getPullStruct(srcRef, dest)
if err != nil {
return nil, err
}
pullStructs = append(pullStructs, pullInfo)
}
} else if srcRef.Transport().Name() == OCIArchive {
// retrieve the manifest from index.json to access the image name
manifest, err := ociarchive.LoadManifestDescriptor(srcRef)
if err != nil {
return nil, errors.Wrapf(err, "error loading manifest for %q", srcRef)
}
if manifest.Annotations == nil || manifest.Annotations["org.opencontainers.image.ref.name"] == "" {
return nil, errors.Errorf("error, archive doesn't have a name annotation. Cannot store image with no name")
}
pullInfo, err := ir.getPullStruct(srcRef, manifest.Annotations["org.opencontainers.image.ref.name"])
if err != nil {
return nil, err
}
pullStructs = append(pullStructs, pullInfo)
} else if srcRef.Transport().Name() == DirTransport {
// supports pull from a directory
image := splitArr[1]
// remove leading "/"
if image[:1] == "/" {
image = image[1:]
}
pullInfo, err := ir.getPullStruct(srcRef, image)
if err != nil {
return nil, err
}
pullStructs = append(pullStructs, pullInfo)
} else {
pullInfo, err := ir.getPullStruct(srcRef, imgName)
if err != nil {
return nil, err
}
pullStructs = append(pullStructs, pullInfo)
}
return pullStructs, nil
}
// pullImage pulls an image from configured registries
// By default, only the latest tag (or a specific tag if requested) will be
// pulled.
func (i *Image) pullImage(writer io.Writer, authfile, signaturePolicyPath string, signingOptions SigningOptions, dockerOptions *DockerRegistryOptions) (string, error) {
// pullImage copies the image from the source to the destination
var pullStructs []*pullStruct
sc := GetSystemContext(signaturePolicyPath, authfile, false)
srcRef, err := alltransports.ParseImageName(i.InputName)
if err != nil {
// could be trying to pull from registry with short name
pullStructs, err = i.createNamesToPull()
if err != nil {
return "", errors.Wrap(err, "error getting default registries to try")
}
} else {
pullStructs, err = i.imageruntime.getPullListFromRef(srcRef, i.InputName, sc)
if err != nil {
return "", errors.Wrapf(err, "error getting pullStruct info to pull image %q", i.InputName)
}
}
policyContext, err := getPolicyContext(sc)
if err != nil {
return "", err
}
defer policyContext.Destroy()
copyOptions := getCopyOptions(writer, signaturePolicyPath, dockerOptions, nil, signingOptions, authfile, "", false)
for _, imageInfo := range pullStructs {
// Print the following statement only when pulling from a docker or atomic registry
if writer != nil && (strings.HasPrefix(DockerTransport, imageInfo.srcRef.Transport().Name()) || imageInfo.srcRef.Transport().Name() == AtomicTransport) {
io.WriteString(writer, fmt.Sprintf("Trying to pull %s...", imageInfo.image))
}
if err = cp.Image(policyContext, imageInfo.dstRef, imageInfo.srcRef, copyOptions); err != nil {
if writer != nil {
io.WriteString(writer, "Failed\n")
}
} else {
return imageInfo.image, nil
}
}
return "", errors.Wrapf(err, "error pulling image from")
}
// createNamesToPull looks at a decomposed image and determines the possible
// images names to try pulling in combination with the registries.conf file as well
func (i *Image) createNamesToPull() ([]*pullStruct, error) {
var pullNames []*pullStruct
decomposedImage, err := decompose(i.InputName)
if err != nil {
return nil, err
}
if decomposedImage.hasRegistry {
srcRef, err := alltransports.ParseImageName(decomposedImage.assembleWithTransport())
if err != nil {
return nil, errors.Errorf("unable to parse '%s'", i.InputName)
}
ps := pullStruct{
image: i.InputName,
srcRef: srcRef,
}
pullNames = append(pullNames, &ps)
} else {
registryConfigPath := ""
envOverride := os.Getenv("REGISTRIES_CONFIG_PATH")
if len(envOverride) > 0 {
registryConfigPath = envOverride
}
searchRegistries, err := sysregistries.GetRegistries(&types.SystemContext{SystemRegistriesConfPath: registryConfigPath})
if err != nil {
return nil, err
}
for _, registry := range searchRegistries {
decomposedImage.registry = registry
srcRef, err := alltransports.ParseImageName(decomposedImage.assembleWithTransport())
if err != nil {
return nil, errors.Errorf("unable to parse '%s'", i.InputName)
}
ps := pullStruct{
image: decomposedImage.assemble(),
srcRef: srcRef,
}
pullNames = append(pullNames, &ps)
}
}
for _, pStruct := range pullNames {
destRef, err := is.Transport.ParseStoreReference(i.imageruntime.store, pStruct.image)
if err != nil {
return nil, errors.Errorf("error parsing dest reference name: %v", err)
}
pStruct.dstRef = destRef
}
return pullNames, nil
}
|
