-
-
Notifications
You must be signed in to change notification settings - Fork 0
/
errors.go
218 lines (191 loc) · 6.44 KB
/
errors.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
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
package distribution // import "github.com/docker/docker/distribution"
import (
"context"
"fmt"
"net/url"
"strings"
"syscall"
"github.com/containerd/log"
"github.com/distribution/reference"
"github.com/docker/distribution"
"github.com/docker/distribution/registry/api/errcode"
v2 "github.com/docker/distribution/registry/api/v2"
"github.com/docker/distribution/registry/client"
"github.com/docker/distribution/registry/client/auth"
"github.com/docker/docker/distribution/xfer"
"github.com/docker/docker/errdefs"
"github.com/pkg/errors"
)
// fallbackError wraps an error that can possibly allow fallback to a different
// endpoint.
type fallbackError struct {
// err is the error being wrapped.
err error
// transportOK is set to true if we managed to speak HTTP with the
// registry. This confirms that we're using appropriate TLS settings
// (or lack of TLS).
transportOK bool
}
// Error renders the FallbackError as a string.
func (f fallbackError) Error() string {
return f.Cause().Error()
}
func (f fallbackError) Cause() error {
return f.err
}
type notFoundError struct {
cause errcode.Error
ref reference.Named
}
func (e notFoundError) Error() string {
switch e.cause.Code {
case errcode.ErrorCodeDenied:
// ErrorCodeDenied is used when access to the repository was denied
return errors.Wrapf(e.cause, "pull access denied for %s, repository does not exist or may require 'docker login'", reference.FamiliarName(e.ref)).Error()
case v2.ErrorCodeManifestUnknown:
return errors.Wrapf(e.cause, "manifest for %s not found", reference.FamiliarString(e.ref)).Error()
case v2.ErrorCodeNameUnknown:
return errors.Wrapf(e.cause, "repository %s not found", reference.FamiliarName(e.ref)).Error()
}
// Shouldn't get here, but this is better than returning an empty string
return e.cause.Message
}
func (e notFoundError) NotFound() {}
func (e notFoundError) Cause() error {
return e.cause
}
// unsupportedMediaTypeError is an error issued when attempted
// to pull unsupported content.
type unsupportedMediaTypeError struct {
MediaType string
}
func (e unsupportedMediaTypeError) InvalidParameter() {}
// Error returns the error string for unsupportedMediaTypeError.
func (e unsupportedMediaTypeError) Error() string {
return "unsupported media type " + e.MediaType
}
// translatePullError is used to convert an error from a registry pull
// operation to an error representing the entire pull operation. Any error
// information which is not used by the returned error gets output to
// log at info level.
func translatePullError(err error, ref reference.Named) error {
switch v := err.(type) {
case errcode.Errors:
if len(v) != 0 {
for _, extra := range v[1:] {
log.G(context.TODO()).WithError(extra).Infof("Ignoring extra error returned from registry")
}
return translatePullError(v[0], ref)
}
case errcode.Error:
switch v.Code {
case errcode.ErrorCodeDenied, v2.ErrorCodeManifestUnknown, v2.ErrorCodeNameUnknown:
return notFoundError{v, ref}
}
case xfer.DoNotRetry:
return translatePullError(v.Err, ref)
}
return errdefs.Unknown(err)
}
func isNotFound(err error) bool {
switch v := err.(type) {
case errcode.Errors:
for _, e := range v {
if isNotFound(e) {
return true
}
}
case errcode.Error:
switch v.Code {
case errcode.ErrorCodeDenied, v2.ErrorCodeManifestUnknown, v2.ErrorCodeNameUnknown:
return true
}
}
return false
}
// continueOnError returns true if we should fallback to the next endpoint
// as a result of this error.
func continueOnError(err error, mirrorEndpoint bool) bool {
switch v := err.(type) {
case errcode.Errors:
if len(v) == 0 {
return true
}
return continueOnError(v[0], mirrorEndpoint)
case errcode.Error:
return mirrorEndpoint
case *client.UnexpectedHTTPResponseError:
return true
case imageConfigPullError:
// imageConfigPullError only happens with v2 images, v1 fallback is
// unnecessary.
// Failures from a mirror endpoint should result in fallback to the
// canonical repo.
return mirrorEndpoint
case unsupportedMediaTypeError:
return false
case error:
return !strings.Contains(err.Error(), strings.ToLower(syscall.ESRCH.Error()))
}
// let's be nice and fallback if the error is a completely
// unexpected one.
// If new errors have to be handled in some way, please
// add them to the switch above.
return true
}
// retryOnError wraps the error in xfer.DoNotRetry if we should not retry the
// operation after this error.
func retryOnError(err error) error {
switch v := err.(type) {
case errcode.Errors:
if len(v) != 0 {
return retryOnError(v[0])
}
case errcode.Error:
switch v.Code {
case errcode.ErrorCodeUnauthorized, errcode.ErrorCodeUnsupported, errcode.ErrorCodeDenied, errcode.ErrorCodeTooManyRequests, v2.ErrorCodeNameUnknown:
return xfer.DoNotRetry{Err: err}
}
case *url.Error:
switch v.Err {
case auth.ErrNoBasicAuthCredentials, auth.ErrNoToken:
return xfer.DoNotRetry{Err: v.Err}
}
return retryOnError(v.Err)
case *client.UnexpectedHTTPResponseError, unsupportedMediaTypeError:
return xfer.DoNotRetry{Err: err}
case error:
if err == distribution.ErrBlobUnknown {
return xfer.DoNotRetry{Err: err}
}
if strings.Contains(err.Error(), strings.ToLower(syscall.ENOSPC.Error())) {
return xfer.DoNotRetry{Err: err}
}
}
// let's be nice and fallback if the error is a completely
// unexpected one.
// If new errors have to be handled in some way, please
// add them to the switch above.
return err
}
type invalidManifestClassError struct {
mediaType string
class string
}
func (e invalidManifestClassError) Error() string {
return fmt.Sprintf("Encountered remote %q(%s) when fetching", e.mediaType, e.class)
}
func (e invalidManifestClassError) InvalidParameter() {}
type invalidManifestFormatError struct{}
func (invalidManifestFormatError) Error() string {
return "unsupported manifest format"
}
func (invalidManifestFormatError) InvalidParameter() {}
type reservedNameError string
func (e reservedNameError) Error() string {
return "'" + string(e) + "' is a reserved name"
}
func (e reservedNameError) Forbidden() {}
func DeprecatedSchema1ImageMessage(ref reference.Named) string {
return fmt.Sprintf("[DEPRECATION NOTICE] Docker Image Format v1, and Docker Image manifest version 2, schema 1 support will be removed in an upcoming release. Suggest the author of %s to upgrade the image to the OCI Format, or Docker Image manifest v2, schema 2. More information at https://docs.docker.com/go/deprecated-image-specs/", ref)
}