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step_create_disks.go
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step_create_disks.go
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// Copyright 2017 Google Inc. All Rights Reserved.
//
// 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 daisy
import (
"context"
"fmt"
"regexp"
"sync"
"github.com/GoogleCloudPlatform/compute-daisy/compute"
)
// CreateDisks is a Daisy CreateDisks workflow step.
type CreateDisks []*Disk
func (c *CreateDisks) populate(ctx context.Context, s *Step) DError {
var errs DError
for _, d := range *c {
errs = addErrs(errs, d.populate(ctx, s))
}
return errs
}
func (c *CreateDisks) validate(ctx context.Context, s *Step) DError {
var errs DError
for _, d := range *c {
errs = addErrs(errs, d.validate(ctx, s))
}
return errs
}
func (c *CreateDisks) run(ctx context.Context, s *Step) DError {
var wg sync.WaitGroup
w := s.w
e := make(chan DError)
for _, d := range *c {
wg.Add(1)
go func(cd *Disk) {
defer wg.Done()
// Get the source image link if using a source image.
if cd.SourceImage != "" {
if image, ok := w.images.get(cd.SourceImage); ok {
cd.SourceImage = image.link
}
}
// Get the source snapshot link if using a source snapshot.
if cd.SourceSnapshot != "" {
if snapshot, ok := w.snapshots.get(cd.SourceSnapshot); ok {
cd.SourceSnapshot = snapshot.link
}
}
w.LogStepInfo(s.name, "CreateDisks", "Creating disk %q.", cd.Name)
if err := w.ComputeClient.CreateDisk(cd.Project, cd.Zone, &cd.Disk); err != nil {
e <- newErr("failed to create disk", err)
return
}
cd.createdInWorkflow = true
}(d)
}
go func() {
wg.Wait()
e <- nil
}()
select {
case err := <-e:
return err
case <-w.Cancel:
// Wait so disks being created now can be deleted.
wg.Wait()
return nil
}
}
var operationErrorCodeRegex = regexp.MustCompile(fmt.Sprintf("(?m)^"+compute.OperationErrorCodeFormat+"$", "QUOTA_EXCEEDED"))
func isQuotaExceeded(err error) bool {
return operationErrorCodeRegex.FindIndex([]byte(err.Error())) != nil
}