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
|
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package resolver
import (
"fmt"
"net/http"
"time"
"github.com/containerd/containerd/reference"
"github.com/containerd/containerd/remotes/docker"
"github.com/containerd/stargz-snapshotter/fs/source"
rhttp "github.com/hashicorp/go-retryablehttp"
)
const defaultRequestTimeoutSec = 30
// Config is config for resolving registries.
type Config struct {
Host map[string]HostConfig `toml:"host"`
}
type HostConfig struct {
Mirrors []MirrorConfig `toml:"mirrors"`
}
type MirrorConfig struct {
// Host is the hostname of the host.
Host string `toml:"host"`
// Insecure is true means use http scheme instead of https.
Insecure bool `toml:"insecure"`
// RequestTimeoutSec is timeout seconds of each request to the registry.
// RequestTimeoutSec == 0 indicates the default timeout (defaultRequestTimeoutSec).
// RequestTimeoutSec < 0 indicates no timeout.
RequestTimeoutSec int `toml:"request_timeout_sec"`
// Header are additional headers to send to the server
Header map[string]interface{} `toml:"header"`
}
type Credential func(string, reference.Spec) (string, string, error)
// RegistryHostsFromConfig creates RegistryHosts (a set of registry configuration) from Config.
func RegistryHostsFromConfig(cfg Config, credsFuncs ...Credential) source.RegistryHosts {
return func(ref reference.Spec) (hosts []docker.RegistryHost, _ error) {
host := ref.Hostname()
for _, h := range append(cfg.Host[host].Mirrors, MirrorConfig{
Host: host,
}) {
client := rhttp.NewClient()
client.Logger = nil // disable logging every request
tr := client.StandardClient()
if h.RequestTimeoutSec >= 0 {
if h.RequestTimeoutSec == 0 {
tr.Timeout = defaultRequestTimeoutSec * time.Second
} else {
tr.Timeout = time.Duration(h.RequestTimeoutSec) * time.Second
}
} // h.RequestTimeoutSec < 0 means "no timeout"
var header http.Header
var err error
if h.Header != nil {
header = http.Header{}
for key, ty := range h.Header {
switch value := ty.(type) {
case string:
header[key] = []string{value}
case []interface{}:
header[key], err = makeStringSlice(value, nil)
if err != nil {
return nil, err
}
default:
return nil, fmt.Errorf("invalid type %v for header %q", ty, key)
}
}
}
config := docker.RegistryHost{
Client: tr,
Host: h.Host,
Scheme: "https",
Path: "/v2",
Capabilities: docker.HostCapabilityPull | docker.HostCapabilityResolve,
Authorizer: docker.NewDockerAuthorizer(
docker.WithAuthClient(tr),
docker.WithAuthCreds(multiCredsFuncs(ref, credsFuncs...))),
Header: header,
}
if localhost, _ := docker.MatchLocalhost(config.Host); localhost || h.Insecure {
config.Scheme = "http"
}
if config.Host == "docker.io" {
config.Host = "registry-1.docker.io"
}
hosts = append(hosts, config)
}
return
}
}
func multiCredsFuncs(ref reference.Spec, credsFuncs ...Credential) func(string) (string, string, error) {
return func(host string) (string, string, error) {
for _, f := range credsFuncs {
if username, secret, err := f(host, ref); err != nil {
return "", "", err
} else if !(username == "" && secret == "") {
return username, secret, nil
}
}
return "", "", nil
}
}
// makeStringSlice is a helper func to convert from []interface{} to []string.
// Additionally an optional cb func may be passed to perform string mapping.
// NOTE: Ported from https://github.com/containerd/containerd/blob/v1.6.9/remotes/docker/config/hosts.go#L516-L533
func makeStringSlice(slice []interface{}, cb func(string) string) ([]string, error) {
out := make([]string, len(slice))
for i, value := range slice {
str, ok := value.(string)
if !ok {
return nil, fmt.Errorf("unable to cast %v to string", value)
}
if cb != nil {
out[i] = cb(str)
} else {
out[i] = str
}
}
return out, nil
}
|
