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manager.go
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manager.go
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package stemcell
import (
"fmt"
bicloud "github.com/cloudfoundry/bosh-cli/cloud"
biconfig "github.com/cloudfoundry/bosh-cli/config"
biui "github.com/cloudfoundry/bosh-cli/ui"
bosherr "github.com/cloudfoundry/bosh-utils/errors"
)
type Manager interface {
FindCurrent() ([]CloudStemcell, error)
Upload(ExtractedStemcell, biui.Stage) (CloudStemcell, error)
FindUnused() ([]CloudStemcell, error)
DeleteUnused(biui.Stage) error
}
type manager struct {
repo biconfig.StemcellRepo
cloud bicloud.Cloud
}
func NewManager(repo biconfig.StemcellRepo, cloud bicloud.Cloud) Manager {
return &manager{
repo: repo,
cloud: cloud,
}
}
func (m *manager) FindCurrent() ([]CloudStemcell, error) {
stemcells := []CloudStemcell{}
stemcellRecord, found, err := m.repo.FindCurrent()
if err != nil {
return stemcells, bosherr.WrapError(err, "Reading stemcell record")
}
if found {
stemcell := NewCloudStemcell(stemcellRecord, m.repo, m.cloud)
stemcells = append(stemcells, stemcell)
}
return stemcells, nil
}
// Upload stemcell to an IAAS. It does the following steps:
// 1) uploads the stemcell to the cloud (if needed),
// 2) saves a record of the uploaded stemcell in the repo
func (m *manager) Upload(extractedStemcell ExtractedStemcell, uploadStage biui.Stage) (cloudStemcell CloudStemcell, err error) {
manifest := extractedStemcell.Manifest()
stageName := fmt.Sprintf("Uploading stemcell '%s/%s'", manifest.Name, manifest.Version)
err = uploadStage.Perform(stageName, func() error {
foundStemcellRecord, found, err := m.repo.Find(manifest.Name, manifest.Version)
if err != nil {
return bosherr.WrapError(err, "Finding existing stemcell record in repo")
}
if found {
cloudStemcell = NewCloudStemcell(foundStemcellRecord, m.repo, m.cloud)
return biui.NewSkipStageError(bosherr.Errorf("Found stemcell: %#v", foundStemcellRecord), "Stemcell already uploaded")
}
cid, err := m.cloud.CreateStemcell(manifest.ImagePath, manifest.CloudProperties)
if err != nil {
return bosherr.WrapErrorf(err, "creating stemcell (%s %s)", manifest.Name, manifest.Version)
}
stemcellRecord, err := m.repo.Save(manifest.Name, manifest.Version, cid)
if err != nil {
//TODO: delete stemcell from cloud when saving fails
return bosherr.WrapErrorf(err, "saving stemcell record in repo (cid=%s, stemcell=%s)", cid, extractedStemcell)
}
cloudStemcell = NewCloudStemcell(stemcellRecord, m.repo, m.cloud)
return nil
})
if err != nil {
return cloudStemcell, err
}
return cloudStemcell, nil
}
func (m *manager) FindUnused() ([]CloudStemcell, error) {
unusedStemcells := []CloudStemcell{}
stemcellRecords, err := m.repo.All()
if err != nil {
return unusedStemcells, bosherr.WrapError(err, "Getting all stemcell records")
}
currentStemcellRecord, found, err := m.repo.FindCurrent()
if err != nil {
return unusedStemcells, bosherr.WrapError(err, "Finding current disk record")
}
for _, stemcellRecord := range stemcellRecords {
if !found || stemcellRecord.ID != currentStemcellRecord.ID {
stemcell := NewCloudStemcell(stemcellRecord, m.repo, m.cloud)
unusedStemcells = append(unusedStemcells, stemcell)
}
}
return unusedStemcells, nil
}
func (m *manager) DeleteUnused(deleteStage biui.Stage) error {
stemcells, err := m.FindUnused()
if err != nil {
return bosherr.WrapError(err, "Finding unused stemcells")
}
for _, stemcell := range stemcells {
stepName := fmt.Sprintf("Deleting unused stemcell '%s'", stemcell.CID())
err = deleteStage.Perform(stepName, func() error {
err := stemcell.Delete()
cloudErr, ok := err.(bicloud.Error)
if ok && cloudErr.Type() == bicloud.StemcellNotFoundError {
return biui.NewSkipStageError(cloudErr, "Stemcell not found")
}
return err
})
if err != nil {
return err
}
}
return nil
}