mirror of https://github.com/hashicorp/packer
This commit allows user to use the Block Storage v3 volume as the Compute instance root volume. Also it adds new volume-related parameters to the builder.pull/6596/head
Andrei Ozerov
8 years ago
committed by
Rickard von Essen
parent
cfa922a180
commit
d51e683bf7
@ -0,0 +1,173 @@
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package openstack
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import (
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"context"
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"fmt"
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"log"
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"time"
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"github.com/gophercloud/gophercloud"
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"github.com/gophercloud/gophercloud/openstack/blockstorage/v3/volumes"
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"github.com/gophercloud/gophercloud/openstack/imageservice/v2/images"
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"github.com/hashicorp/packer/helper/multistep"
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"github.com/hashicorp/packer/packer"
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)
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type StepCreateVolume struct {
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UseBlockStorageVolume bool
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SourceImage string
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VolumeName string
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VolumeType string
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VolumeAvailabilityZone string
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volumeID string
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doCleanup bool
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}
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func (s *StepCreateVolume) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
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// Proceed only if block storage volume is required.
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if !s.UseBlockStorageVolume {
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return multistep.ActionContinue
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}
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config := state.Get("config").(Config)
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ui := state.Get("ui").(packer.Ui)
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// We will need Block Storage and Image services clients.
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blockStorageClient, err := config.blockStorageV3Client()
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if err != nil {
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err = fmt.Errorf("Error initializing block storage client: %s", err)
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state.Put("error", err)
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return multistep.ActionHalt
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}
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imageClient, err := config.imageV2Client()
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if err != nil {
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err = fmt.Errorf("Error initializing image client: %s", err)
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state.Put("error", err)
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return multistep.ActionHalt
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}
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// Get needed volume size from the source image.
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volumeSize, err := GetVolumeSize(imageClient, s.SourceImage)
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if err != nil {
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err := fmt.Errorf("Error creating volume: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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ui.Say("Creating volume...")
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volumeOpts := volumes.CreateOpts{
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Size: volumeSize,
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VolumeType: s.VolumeType,
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AvailabilityZone: s.VolumeAvailabilityZone,
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Name: s.VolumeName,
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ImageID: s.SourceImage,
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}
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volume, err := volumes.Create(blockStorageClient, volumeOpts).Extract()
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if err != nil {
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err := fmt.Errorf("Error creating volume: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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// Wait for the volume to become ready.
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ui.Say(fmt.Sprintf("Waiting for volume %s (volume id: %s) to become ready...", config.VolumeName, volume.ID))
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if err := WaitForVolume(blockStorageClient, volume.ID); err != nil {
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err := fmt.Errorf("Error waiting for volume: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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// Volume was created, so remember to clean it up.
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s.doCleanup = true
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// Set the Volume ID in the state.
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ui.Message(fmt.Sprintf("Volume ID: %s", volume.ID))
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state.Put("volume_id", volume.ID)
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s.volumeID = volume.ID
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return multistep.ActionContinue
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}
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// GetVolumeSize returns volume size in gigabytes based on the image min disk
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// value if it's not empty.
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// Or it calculates needed gigabytes size from the image bytes size.
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func GetVolumeSize(imageClient *gophercloud.ServiceClient, imageID string) (int, error) {
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sourceImage, err := images.Get(imageClient, imageID).Extract()
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if err != nil {
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return 0, err
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}
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if sourceImage.MinDiskGigabytes != 0 {
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return sourceImage.MinDiskGigabytes, nil
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}
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volumeSizeMB := sourceImage.SizeBytes / 1024 / 1024
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volumeSizeGB := int(sourceImage.SizeBytes / 1024 / 1024 / 1024)
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// Increment gigabytes size if the initial size can't be divided without
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// remainder.
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if volumeSizeMB%1024 > 0 {
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volumeSizeGB++
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}
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return volumeSizeGB, nil
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}
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// WaitForVolume waits for the given volume to become ready.
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func WaitForVolume(blockStorageClient *gophercloud.ServiceClient, volumeID string) error {
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maxNumErrors := 10
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numErrors := 0
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for {
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volume, err := volumes.Get(blockStorageClient, volumeID).Extract()
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if err != nil {
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errCode, ok := err.(*gophercloud.ErrUnexpectedResponseCode)
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if ok && (errCode.Actual == 500 || errCode.Actual == 404) {
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numErrors++
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if numErrors >= maxNumErrors {
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log.Printf("[ERROR] Maximum number of errors (%d) reached; failing with: %s", numErrors, err)
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return err
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}
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log.Printf("[ERROR] %d error received, will ignore and retry: %s", errCode.Actual, err)
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time.Sleep(2 * time.Second)
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continue
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}
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return err
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}
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if volume.Status == "available" {
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return nil
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}
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log.Printf("Waiting for volume creation status: %s", volume.Status)
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time.Sleep(2 * time.Second)
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}
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}
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func (s *StepCreateVolume) Cleanup(state multistep.StateBag) {
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if !s.doCleanup {
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return
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}
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config := state.Get("config").(Config)
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ui := state.Get("ui").(packer.Ui)
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blockStorageClient, err := config.blockStorageV3Client()
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if err != nil {
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ui.Error(fmt.Sprintf(
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"Error cleaning up volume. Please delete the volume manually: %s", s.volumeID))
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return
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}
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ui.Say(fmt.Sprintf("Deleting volume: %s ...", s.volumeID))
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err = volumes.Delete(blockStorageClient, s.volumeID).ExtractErr()
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if err != nil {
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ui.Error(fmt.Sprintf(
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"Error cleaning up volume. Please delete the volume manually: %s", s.volumeID))
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}
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}
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