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|
package resolver
import (
"crypto/tls"
"crypto/x509"
"net"
"net/http"
"runtime"
"time"
"github.com/containerd/containerd/remotes/docker"
"github.com/moby/buildkit/util/tracing"
"github.com/pkg/errors"
)
// TODO: copied from buildkit/util/resolver. Update upstream so we can use the same code.
type RegistryConfig struct {
Mirrors []string
PlainHTTP *bool
Insecure *bool
RootCAs [][]byte
KeyPairs []TLSKeyPair
}
type TLSKeyPair struct {
Key []byte
Certificate []byte
}
func fillInsecureOpts(host string, c RegistryConfig, h docker.RegistryHost) ([]docker.RegistryHost, error) {
var hosts []docker.RegistryHost
tc, err := loadTLSConfig(c)
if err != nil {
return nil, err
}
var isHTTP bool
if c.PlainHTTP != nil && *c.PlainHTTP {
isHTTP = true
}
if c.PlainHTTP == nil {
if ok, _ := docker.MatchLocalhost(host); ok {
isHTTP = true
}
}
if isHTTP {
h2 := h
h2.Scheme = "http"
hosts = append(hosts, h2)
}
if c.Insecure != nil && *c.Insecure {
h2 := h
transport := newDefaultTransport()
transport.TLSClientConfig = tc
h2.Client = &http.Client{
Transport: tracing.NewTransport(transport),
}
tc.InsecureSkipVerify = true
hosts = append(hosts, h2)
}
if len(hosts) == 0 {
transport := newDefaultTransport()
transport.TLSClientConfig = tc
h.Client = &http.Client{
Transport: tracing.NewTransport(transport),
}
hosts = append(hosts, h)
}
return hosts, nil
}
func loadTLSConfig(c RegistryConfig) (*tls.Config, error) {
tc := &tls.Config{}
if len(c.RootCAs) > 0 {
systemPool, err := x509.SystemCertPool()
if err != nil {
if runtime.GOOS == "windows" {
systemPool = x509.NewCertPool()
} else {
return nil, errors.Wrapf(err, "unable to get system cert pool")
}
}
tc.RootCAs = systemPool
}
for _, p := range c.RootCAs {
tc.RootCAs.AppendCertsFromPEM(p)
}
for _, kp := range c.KeyPairs {
cert, err := tls.X509KeyPair(kp.Certificate, kp.Key)
if err != nil {
return nil, errors.Wrapf(err, "failed to load keypair for %s", kp.Certificate)
}
tc.Certificates = append(tc.Certificates, cert)
}
return tc, nil
}
// NewRegistryConfig converts registry config to docker.RegistryHosts callback
func NewRegistryConfig(m map[string]RegistryConfig) docker.RegistryHosts {
return docker.Registries(
func(host string) ([]docker.RegistryHost, error) {
c, ok := m[host]
if !ok {
return nil, nil
}
var out []docker.RegistryHost
for _, mirror := range c.Mirrors {
h := docker.RegistryHost{
Scheme: "https",
Client: newDefaultClient(),
Host: mirror,
Path: "/v2",
Capabilities: docker.HostCapabilityPull | docker.HostCapabilityResolve,
}
hosts, err := fillInsecureOpts(mirror, m[mirror], h)
if err != nil {
return nil, err
}
out = append(out, hosts...)
}
if host == "docker.io" {
host = "registry-1.docker.io"
}
h := docker.RegistryHost{
Scheme: "https",
Client: newDefaultClient(),
Host: host,
Path: "/v2",
Capabilities: docker.HostCapabilityPush | docker.HostCapabilityPull | docker.HostCapabilityResolve,
}
hosts, err := fillInsecureOpts(host, c, h)
if err != nil {
return nil, err
}
out = append(out, hosts...)
return out, nil
},
docker.ConfigureDefaultRegistries(
docker.WithClient(newDefaultClient()),
docker.WithPlainHTTP(docker.MatchLocalhost),
),
)
}
func newDefaultClient() *http.Client {
return &http.Client{
Transport: tracing.NewTransport(newDefaultTransport()),
}
}
// newDefaultTransport is for pull or push client
//
// NOTE: For push, there must disable http2 for https because the flow control
// will limit data transfer. The net/http package doesn't provide http2 tunable
// settings which limits push performance.
//
// REF: https://github.com/golang/go/issues/14077
func newDefaultTransport() *http.Transport {
return &http.Transport{
Proxy: http.ProxyFromEnvironment,
DialContext: (&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 60 * time.Second,
}).DialContext,
MaxIdleConns: 30,
IdleConnTimeout: 120 * time.Second,
MaxIdleConnsPerHost: 4,
TLSHandshakeTimeout: 10 * time.Second,
ExpectContinueTimeout: 5 * time.Second,
TLSNextProto: make(map[string]func(authority string, c *tls.Conn) http.RoundTripper),
}
}
|
