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docker_config.go
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docker_config.go
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// Copyright © 2021 Banzai Cloud
//
// 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 pullsecrets
import (
"context"
"encoding/json"
"fmt"
"time"
"github.com/banzaicloud/imps/api/common"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
"emperror.dev/errors"
)
func NewDockerRegistryConfig() common.DockerRegistryConfig {
return common.DockerRegistryConfig{
Auths: map[string]common.LoginCredentials{},
}
}
type LoginCredentialsWithDetails struct {
common.LoginCredentials
Expiration *time.Time
URL string
}
type LoginCredentialProvider interface {
LoginCredentials(context.Context) ([]LoginCredentialsWithDetails, error)
}
type Config struct {
Registries map[string]LoginCredentialProvider
}
func NewConfig() *Config {
return &Config{
Registries: map[string]LoginCredentialProvider{},
}
}
func NewConfigFromSecrets(ctx context.Context, c client.Client, refs []types.NamespacedName) *Config {
var secret corev1.Secret
config := NewConfig()
for _, secretRef := range refs {
secretName := fmt.Sprintf("%s.%s", secretRef.Namespace, secretRef.Name)
err := c.Get(ctx, client.ObjectKey{
Namespace: secretRef.Namespace,
Name: secretRef.Name,
}, &secret)
if err != nil {
config.Registries[secretName] = NewErroredCredentialProvider(err)
continue
}
switch secret.Type {
case common.SecretTypeBasicAuth:
dockerConfig, found := secret.Data[common.SecretKeyDockerConfig]
if !found {
config.Registries[secretName] = NewErroredCredentialProvider(
errors.NewWithDetails("no docker configuration found in secret", "secret", secret.ObjectMeta))
continue
}
config.Registries[secretName] = config.StaticProviderFromDockerConfig(dockerConfig)
case common.SecretTypeECRCredentials:
config.Registries[secretName] = config.ECRProviderFromSecret(secret.Data)
default:
config.Registries[secretName] = NewErroredCredentialProvider(
errors.NewWithDetails("unknown secret type", "type", secret.Type, "secret", secret.ObjectMeta))
}
}
return config
}
func (c *Config) StaticProviderFromDockerConfig(data []byte) LoginCredentialProvider {
var dockerConfig common.DockerRegistryConfig
err := json.Unmarshal(data, &dockerConfig)
if err != nil {
return NewErroredCredentialProvider(err)
}
return NewStaticLoginCredentialProvider(dockerConfig)
}
func getOptionalFieldFromMap(data map[string][]byte, key string, defaultVal string) string {
value, found := data[key]
if !found {
return defaultVal
}
return string(value)
}
func getFieldFromMap(data map[string][]byte, key string) (string, error) {
value, found := data[key]
if !found {
return "", fmt.Errorf("no such key: %s", key)
}
return string(value), nil
}
func (c *Config) ECRProviderFromSecret(data map[string][]byte) LoginCredentialProvider {
accountID, err := getFieldFromMap(data, common.ECRSecretAccountID)
if err != nil {
return NewErroredCredentialProvider(err)
}
region, err := getFieldFromMap(data, common.ECRSecretRegion)
if err != nil {
return NewErroredCredentialProvider(err)
}
accKeyID, err := getFieldFromMap(data, common.ECRSecretKeyAccessKeyID)
if err != nil {
return NewErroredCredentialProvider(err)
}
secretKey, err := getFieldFromMap(data, common.ECRSecretSecretKey)
if err != nil {
return NewErroredCredentialProvider(err)
}
roleArn := getOptionalFieldFromMap(data, common.ECRRoleArn, "")
return NewECRLoginCredentialsProvider(accountID, region, accKeyID, secretKey, roleArn)
}
type ResultingDockerConfig struct {
ErrorsPerSecret
ConfigContents []byte
Expiration *time.Time
}
func (c Config) ResultingDockerConfig(ctx context.Context) (*ResultingDockerConfig, error) {
finalRegistryConfig := NewDockerRegistryConfig()
var minExpiration *time.Time = nil
secretErrors := NewErrorsPerSecret()
for secret, provider := range c.Registries {
secretErrors.AddSecret(secret)
credentials, err := provider.LoginCredentials(ctx)
if err != nil {
secretErrors.SetSecretError(secret, err)
continue
}
for _, credential := range credentials {
if credential.Expiration != nil {
if minExpiration == nil || (credential.Expiration).Before(*minExpiration) {
minExpiration = credential.Expiration
}
}
finalRegistryConfig.Auths[credential.URL] = credential.LoginCredentials
}
}
marshaledRegistryConfig, err := json.Marshal(finalRegistryConfig)
if err != nil {
return nil, errors.Wrap(err, "cannot encode docker configuration into a JSON")
}
return &ResultingDockerConfig{
ErrorsPerSecret: secretErrors,
ConfigContents: marshaledRegistryConfig,
Expiration: minExpiration,
}, nil
}
func (c ResultingDockerConfig) AsSecret(secretNamespace, secretName string) *corev1.Secret {
return &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: secretName,
Namespace: secretNamespace,
},
Type: common.SecretTypeBasicAuth,
StringData: map[string]string{
common.SecretKeyDockerConfig: string(c.ConfigContents),
},
}
}