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broker.go
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broker.go
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// Copyright the Service Broker Project Authors.
//
// 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 storage
import (
"net/http"
googlestorage "cloud.google.com/go/storage"
"code.cloudfoundry.org/lager"
"encoding/json"
"fmt"
"gcp-service-broker/brokerapi/brokers/broker_base"
"gcp-service-broker/brokerapi/brokers/models"
"gcp-service-broker/brokerapi/brokers/name_generator"
"gcp-service-broker/db_service"
"golang.org/x/net/context"
"google.golang.org/api/option"
)
type StorageBroker struct {
Client *http.Client
ProjectId string
Logger lager.Logger
broker_base.BrokerBase
}
type InstanceInformation struct {
BucketName string `json:"bucket_name"`
}
// creates a new bucket with the name given in provision details and optional location
// (defaults to "US", for acceptable location values see: https://cloud.google.com/storage/docs/bucket-locations)
func (b *StorageBroker) Provision(instanceId string, details models.ProvisionDetails, plan models.PlanDetails) (models.ServiceInstanceDetails, error) {
var err error
var planDetails map[string]string
if err = json.Unmarshal([]byte(plan.Features), &planDetails); err != nil {
return models.ServiceInstanceDetails{}, fmt.Errorf("Error unmarshalling plan features: %s", err)
}
storageClass := planDetails["storage_class"]
var params map[string]string
if len(details.RawParameters) == 0 {
params = map[string]string{}
} else if err = json.Unmarshal(details.RawParameters, ¶ms); err != nil {
return models.ServiceInstanceDetails{}, fmt.Errorf("Error unmarshalling parameters: %s", err)
}
// Ensure there is a name for this instance
if _, ok := params["name"]; !ok {
params["name"] = name_generator.Basic.InstanceName()
}
// make a new bucket
ctx := context.Background()
co := option.WithUserAgent(models.CustomUserAgent)
storageService, err := googlestorage.NewClient(ctx, co)
if err != nil {
return models.ServiceInstanceDetails{}, fmt.Errorf("Error creating new storage client: %s", err)
}
bucket := storageService.Bucket(params["name"])
loc := "US"
userLoc, locOk := params["location"]
if locOk {
loc = userLoc
}
attrs := googlestorage.BucketAttrs{
Name: params["name"],
StorageClass: storageClass,
Location: loc,
}
// create the bucket. Nil uses default bucket attributes
err = bucket.Create(ctx, b.ProjectId, &attrs)
if err != nil {
return models.ServiceInstanceDetails{}, fmt.Errorf("Error creating new bucket: %s", err)
}
ii := InstanceInformation{
BucketName: params["name"],
}
otherDetails, err := json.Marshal(ii)
if err != nil {
return models.ServiceInstanceDetails{}, fmt.Errorf("Error marshalling json: %s", err)
}
i := models.ServiceInstanceDetails{
Name: attrs.Name,
Url: "",
Location: attrs.Location,
OtherDetails: string(otherDetails),
}
return i, nil
}
// Deletes the bucket associated with the given instance id
// Note that all objects within the bucket must be deleted first
func (b *StorageBroker) Deprovision(instanceID string, details models.DeprovisionDetails) error {
bucket := models.ServiceInstanceDetails{}
if err := db_service.DbConnection.Where("ID = ?", instanceID).First(&bucket).Error; err != nil {
return models.ErrInstanceDoesNotExist
}
ctx := context.Background()
storageService, err := googlestorage.NewClient(ctx)
if err != nil {
return fmt.Errorf("Error creating storage client: %s", err)
}
if err = storageService.Bucket(bucket.Name).Delete(ctx); err != nil {
return fmt.Errorf("Error deleting bucket: %s", err)
}
return nil
}