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kubernetes.go
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kubernetes.go
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// Copyright © 2020 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 kubesecret
import (
"encoding/base64"
"encoding/json"
"emperror.dev/errors"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/banzaicloud/pipeline/internal/secret/secrettype"
"github.com/banzaicloud/pipeline/src/secret"
)
// KubeSecretRequest contains details for a Kubernetes Secret creation from pipeline secrets.
type KubeSecretRequest struct {
Name string
Namespace string
Type string
Values map[string]string
Spec KubeSecretSpec
}
type KubeSecretSpec map[string]KubeSecretSpecItem
type KubeSecretSpecItem struct {
Source string
SourceMap map[string]string
Value string
}
// CreateKubeSecret creates a Kubernetes Secret object from a Secret.
func CreateKubeSecret(req KubeSecretRequest) (v1.Secret, error) {
kubeSecret := v1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: req.Name,
Namespace: req.Namespace,
},
StringData: map[string]string{},
}
secretMeta := secrettype.DefaultRules[req.Type]
opaqueMap := make(map[string]bool, len(secretMeta.Fields))
// Generic secret fields are never opaque
if req.Type != secrettype.GenericSecret {
for _, field := range secretMeta.Fields {
opaqueMap[field.Name] = field.Opaque
}
}
// Add secret values as is
if len(req.Spec) == 0 {
for key, value := range req.Values {
if opaqueMap[key] {
continue
}
kubeSecret.StringData[key] = value
}
} else {
for key, specItem := range req.Spec {
if specItem.Source != "" { // Map one secret
if opaqueMap[specItem.Source] {
continue
}
// TODO: error handling (missing secret key)?
kubeSecret.StringData[key] = req.Values[specItem.Source]
} else if specItem.Value == "" { // Map multiple secrets
sourceMap := make(map[string]string)
if len(specItem.SourceMap) > 0 { // Map certain secrets
sourceMap = specItem.SourceMap
} else { // Include all secrets
for key := range req.Values {
sourceMap[key] = key
}
}
data := make(map[string]string)
for dest, source := range sourceMap {
if opaqueMap[source] {
continue
}
// TODO: error handling (missing secret key)?
data[dest] = req.Values[source]
}
rawData, err := json.Marshal(data)
if err != nil {
return kubeSecret, errors.Wrap(err, "could not marshal secret")
}
kubeSecret.StringData[key] = string(rawData)
} else { // Map value directly
kubeSecret.StringData[key] = specItem.Value
}
}
}
return kubeSecret, nil
}
type KubeSecretStore struct {
secrets SecretStore
}
func MakeKubeSecretStore(secrets SecretStore) KubeSecretStore {
return KubeSecretStore{
secrets: secrets,
}
}
type SecretStore interface {
Get(organizationID uint, secretID string) (*secret.SecretItemResponse, error)
}
func (s KubeSecretStore) Get(organizationID uint, k8sSecretID string) ([]byte, error) {
sir, err := s.secrets.Get(organizationID, k8sSecretID)
if err != nil {
return nil, errors.WrapIf(err, "failed to get k8s config from secret store")
}
k8sConfig, err := base64.StdEncoding.DecodeString(sir.Values[secrettype.K8SConfig])
if err != nil {
return nil, errors.WrapIf(err, "can't decode Kubernetes config")
}
return k8sConfig, nil
}