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registry.go
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registry.go
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package registry
import (
"context"
"encoding/base64"
"encoding/json"
"fmt"
"net/url"
"strings"
"github.com/pkg/errors"
kotsv1beta1 "github.com/replicatedhq/kots/kotskinds/apis/kots/v1beta1"
corev1 "k8s.io/api/core/v1"
kuberneteserrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
)
type RegistryProxyInfo struct {
Registry string
Proxy string
}
type DockercfgAuth struct {
Auth string `json:"auth,omitempty"`
}
type DockerCfgJSON struct {
Auths map[string]DockercfgAuth `json:"auths"`
}
type Credentials struct {
Username string
Password string
}
type ImagePullSecrets struct {
AdminConsoleSecret corev1.Secret // this field is always populated
AppSecret *corev1.Secret
}
const DockerHubRegistryName = "index.docker.io"
const DockerHubSecretName = "kotsadm-dockerhub"
func ProxyEndpointFromLicense(license *kotsv1beta1.License) *RegistryProxyInfo {
defaultInfo := &RegistryProxyInfo{
Registry: "registry.replicated.com",
Proxy: "proxy.replicated.com",
}
if license == nil {
return defaultInfo
}
u, err := url.Parse(license.Spec.Endpoint)
if err != nil {
return defaultInfo
}
switch u.Hostname() {
case "staging.replicated.app":
return &RegistryProxyInfo{
Registry: "registry.staging.replicated.com",
Proxy: "proxy.staging.replicated.com",
}
case "replicated-app":
return &RegistryProxyInfo{
Registry: "registry:3000", // TODO: not real info
Proxy: "registry-proxy:3000",
}
default:
return defaultInfo
}
}
func (r *RegistryProxyInfo) ToSlice() []string {
return []string{
r.Proxy,
r.Registry,
}
}
func SecretNameFromPrefix(namePrefix string) string {
if namePrefix == "" {
return ""
}
return fmt.Sprintf("%s-registry", namePrefix)
}
func PullSecretForRegistries(registries []string, username, password string, kuberneteNamespace string, namePrefix string) (*ImagePullSecrets, error) {
dockercfgAuth := DockercfgAuth{
Auth: base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%s:%s", username, password))),
}
dockerCfgJSON := DockerCfgJSON{
Auths: map[string]DockercfgAuth{},
}
for _, r := range registries {
// we can get "host/namespace" here, which can break parts of kots that use hostname to lookup secret.
host := strings.Split(r, "/")[0]
dockerCfgJSON.Auths[host] = dockercfgAuth
}
secretData, err := json.Marshal(dockerCfgJSON)
if err != nil {
return nil, errors.Wrap(err, "failed to marshal pull secret data")
}
// try to ensure this is created first if using a helm install
annotations := map[string]string{
"helm.sh/hook": "pre-install,pre-upgrade",
"helm.sh/hook-weight": "-9999",
}
secrets := &ImagePullSecrets{
AdminConsoleSecret: corev1.Secret{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "Secret",
},
ObjectMeta: metav1.ObjectMeta{
Name: "kotsadm-replicated-registry",
Namespace: kuberneteNamespace,
Annotations: annotations,
},
Type: corev1.SecretTypeDockerConfigJson,
Data: map[string][]byte{
".dockerconfigjson": secretData,
},
},
}
if namePrefix == "" {
return secrets, nil
}
secrets.AppSecret = &corev1.Secret{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "Secret",
},
ObjectMeta: metav1.ObjectMeta{
Name: SecretNameFromPrefix(namePrefix),
Namespace: kuberneteNamespace,
Annotations: annotations,
},
Type: corev1.SecretTypeDockerConfigJson,
Data: map[string][]byte{
".dockerconfigjson": secretData,
},
}
return secrets, nil
}
func EnsureDockerHubSecret(username string, password string, namespace string, clientset *kubernetes.Clientset) error {
_, err := clientset.CoreV1().Secrets(namespace).Get(context.TODO(), DockerHubSecretName, metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to get existing dockerhub secret")
}
secret, err := PullSecretForDockerHub(username, password, namespace)
if err != nil {
return errors.Wrap(err, "failed to get pull secret for dockerhub")
}
// secret not found, create it
_, err = clientset.CoreV1().Secrets(namespace).Create(context.TODO(), secret, metav1.CreateOptions{})
if err != nil {
return errors.Wrap(err, "failed to create dockerhub secret")
}
}
return nil
}
func PullSecretForDockerHub(username string, password string, kuberneteNamespace string) (*corev1.Secret, error) {
dockercfgAuth := DockercfgAuth{
Auth: base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%s:%s", username, password))),
}
dockerCfgJSON := DockerCfgJSON{
Auths: map[string]DockercfgAuth{
DockerHubRegistryName: dockercfgAuth,
},
}
secretData, err := json.Marshal(dockerCfgJSON)
if err != nil {
return nil, errors.Wrap(err, "failed to marshal pull secret data")
}
secret := &corev1.Secret{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "Secret",
},
ObjectMeta: metav1.ObjectMeta{
Name: DockerHubSecretName,
Namespace: kuberneteNamespace,
},
Type: corev1.SecretTypeDockerConfigJson,
Data: map[string][]byte{
".dockerconfigjson": secretData,
},
}
return secret, nil
}
func GetDockerHubCredentials(clientset kubernetes.Interface, namespace string) (Credentials, error) {
imagePullSecret, err := clientset.CoreV1().Secrets(namespace).Get(context.TODO(), DockerHubSecretName, metav1.GetOptions{})
if err != nil {
if kuberneteserrors.IsNotFound(err) {
return Credentials{}, nil
}
return Credentials{}, errors.Wrap(err, "failed to get existing dockerhub secret")
}
dockerConfigJson := imagePullSecret.Data[".dockerconfigjson"]
if len(dockerConfigJson) == 0 {
return Credentials{}, nil
}
return GetCredentialsForRegistryFromConfigJSON(dockerConfigJson, DockerHubRegistryName)
}
func GetCredentialsForRegistryFromConfigJSON(configJson []byte, registry string) (Credentials, error) {
creds, err := GetCredentialsFromConfigJSON(configJson)
if err != nil {
return Credentials{}, errors.Wrap(err, "failed parse config json")
}
c, ok := creds[registry]
if !ok {
return Credentials{}, nil
}
return c, nil
}
func GetCredentialsFromConfigJSON(configJson []byte) (map[string]Credentials, error) {
dockerCfgJSON := DockerCfgJSON{}
err := json.Unmarshal(configJson, &dockerCfgJSON)
if err != nil {
return nil, errors.Wrap(err, "failed to unmarshal config json")
}
result := map[string]Credentials{}
for registry, auth := range dockerCfgJSON.Auths {
decoded, err := base64.StdEncoding.DecodeString(auth.Auth)
if err != nil {
return nil, errors.Wrap(err, "failed to decode auth string")
}
parts := strings.SplitN(string(decoded), ":", 2)
if len(parts) != 2 {
return nil, errors.Errorf("expected 2 parts in the string, but found %d", len(parts))
}
result[registry] = Credentials{
Username: parts[0],
Password: parts[1],
}
}
return result, nil
}