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|
package daemon
import (
"context"
"crypto/tls"
"crypto/x509"
"fmt"
"net/http"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"github.com/containerd/containerd/v2/core/remotes/docker"
hostconfig "github.com/containerd/containerd/v2/core/remotes/docker/config"
cerrdefs "github.com/containerd/errdefs"
"github.com/docker/docker/registry"
"github.com/pkg/errors"
)
const (
defaultPath = "/v2"
)
// RegistryHosts returns the registry hosts configuration for the host component
// of a distribution image reference.
func (daemon *Daemon) RegistryHosts(host string) ([]docker.RegistryHost, error) {
hosts, err := hostconfig.ConfigureHosts(context.Background(), hostconfig.HostOptions{
// TODO: Also check containerd path when updating containerd to use multiple host directories
HostDir: hostconfig.HostDirFromRoot(registry.CertsDir()),
})(host)
if err == nil {
// Merge in legacy configuration if provided
if cfg := daemon.config().Config; len(cfg.Mirrors) > 0 || len(cfg.InsecureRegistries) > 0 {
hosts, err = daemon.mergeLegacyConfig(host, hosts)
}
}
return hosts, err
}
func (daemon *Daemon) mergeLegacyConfig(host string, hosts []docker.RegistryHost) ([]docker.RegistryHost, error) {
// If no hosts provided, nothing to do.
// If multiple hosts provided, then a mirror configuration is already provided and
// should not overwrite with legacy config.
if len(hosts) == 0 || len(hosts) > 1 {
return hosts, nil
}
sc := daemon.registryService.ServiceConfig()
if host == "docker.io" && len(sc.Mirrors) > 0 {
hosts = mirrorsToRegistryHosts(sc.Mirrors, hosts[0])
}
hostDir := hostconfig.HostDirFromRoot(registry.CertsDir())
for i := range hosts {
t, ok := hosts[i].Client.Transport.(*http.Transport)
if !ok {
continue
}
if t.TLSClientConfig == nil {
certsDir, err := hostDir(host)
if err != nil && !cerrdefs.IsNotFound(err) {
return nil, err
} else if err == nil {
c, err := loadTLSConfig(certsDir)
if err != nil {
return nil, err
}
t.TLSClientConfig = c
}
}
if daemon.registryService.IsInsecureRegistry(hosts[i].Host) {
if t.TLSClientConfig == nil {
t.TLSClientConfig = &tls.Config{} //nolint: gosec // G402: TLS MinVersion too low.
}
t.TLSClientConfig.InsecureSkipVerify = true
hosts[i].Client.Transport = docker.NewHTTPFallback(hosts[i].Client.Transport)
}
}
return hosts, nil
}
func mirrorsToRegistryHosts(mirrors []string, dHost docker.RegistryHost) []docker.RegistryHost {
var mirrorHosts []docker.RegistryHost
for _, mirror := range mirrors {
h := dHost
h.Capabilities = docker.HostCapabilityPull | docker.HostCapabilityResolve
u, err := url.Parse(mirror)
if err != nil || u.Host == "" {
u, err = url.Parse(fmt.Sprintf("dummy://%s", mirror))
}
if err == nil && u.Host != "" {
h.Host = u.Host
h.Path = strings.TrimSuffix(u.Path, "/")
// For compatibility with legacy mirrors, ensure ends with /v2
// NOTE: Use newer configuration to completely override the path
if !strings.HasSuffix(h.Path, defaultPath) {
h.Path = path.Join(h.Path, defaultPath)
}
if u.Scheme != "dummy" {
h.Scheme = u.Scheme
}
} else {
h.Host = mirror
h.Path = defaultPath
}
mirrorHosts = append(mirrorHosts, h)
}
return append(mirrorHosts, dHost)
}
func loadTLSConfig(d string) (*tls.Config, error) {
fs, err := os.ReadDir(d)
if err != nil && !errors.Is(err, os.ErrNotExist) && !errors.Is(err, os.ErrPermission) {
return nil, errors.WithStack(err)
}
type keyPair struct {
Certificate string
Key string
}
var (
rootCAs []string
keyPairs []keyPair
)
for _, f := range fs {
switch filepath.Ext(f.Name()) {
case ".crt":
rootCAs = append(rootCAs, filepath.Join(d, f.Name()))
case ".cert":
keyPairs = append(keyPairs, keyPair{
Certificate: filepath.Join(d, f.Name()),
Key: filepath.Join(d, strings.TrimSuffix(f.Name(), ".cert")+".key"),
})
}
}
tc := &tls.Config{
MinVersion: tls.VersionTLS12,
}
if len(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 rootCAs {
dt, err := os.ReadFile(p)
if err != nil {
return nil, err
}
tc.RootCAs.AppendCertsFromPEM(dt)
}
for _, kp := range keyPairs {
cert, err := tls.LoadX509KeyPair(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
}
|
