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gcpbotanist.go
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gcpbotanist.go
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// Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 gcpbotanist
import (
"bytes"
"encoding/json"
"errors"
gardenv1beta1 "github.com/gardener/gardener/pkg/apis/garden/v1beta1"
"github.com/gardener/gardener/pkg/operation"
"github.com/gardener/gardener/pkg/operation/common"
)
// New takes an operation object <o> and creates a new GCPBotanist object.
func New(o *operation.Operation, purpose string) (*GCPBotanist, error) {
var cloudProvider gardenv1beta1.CloudProvider
switch purpose {
case common.CloudPurposeShoot:
cloudProvider = o.Shoot.CloudProvider
case common.CloudPurposeSeed:
cloudProvider = o.Seed.CloudProvider
}
if cloudProvider != gardenv1beta1.CloudProviderGCP {
return nil, errors.New("cannot instantiate an GCP botanist if neither Shoot nor Seed cluster specifies GCP")
}
// Read vpc name out of the Shoot manifest
vpcName := ""
if purpose == common.CloudPurposeShoot {
if gcp := o.Shoot.Info.Spec.Cloud.GCP; gcp != nil {
if vpc := gcp.Networks.VPC; vpc != nil {
vpcName = vpc.Name
}
}
}
// Read project id out of the service account
var serviceAccountJSON []byte
switch purpose {
case common.CloudPurposeShoot:
serviceAccountJSON = o.Shoot.Secret.Data[ServiceAccountJSON]
case common.CloudPurposeSeed:
serviceAccountJSON = o.Seed.Secret.Data[ServiceAccountJSON]
}
project, err := ExtractProjectID(serviceAccountJSON)
if err != nil {
return nil, err
}
// Minify serviceaccount json to allow injection into Terraform environment
minifiedServiceAccount, err := MinifyServiceAccount(serviceAccountJSON)
if err != nil {
return nil, err
}
return &GCPBotanist{
Operation: o,
CloudProviderName: "gce",
VPCName: vpcName,
Project: project,
MinifiedServiceAccount: minifiedServiceAccount,
}, nil
}
// GetCloudProviderName returns the Kubernetes cloud provider name for this cloud.
func (b *GCPBotanist) GetCloudProviderName() string {
return b.CloudProviderName
}
// MinifyServiceAccount uses the provided service account JSON objects and minifies it.
// This is required when you want to inject it as environment variable into Terraform.
func MinifyServiceAccount(serviceAccountJSON []byte) (string, error) {
buf := new(bytes.Buffer)
if err := json.Compact(buf, serviceAccountJSON); err != nil {
return "", err
}
return buf.String(), nil
}
// ExtractProjectID extracts the value of the key "project_id" from the service account
// JSON document.
func ExtractProjectID(ServiceAccountJSON []byte) (string, error) {
var j struct {
Project string `json:"project_id"`
}
if err := json.Unmarshal(ServiceAccountJSON, &j); err != nil {
return "Error", err
}
return j.Project, nil
}