github.phpd.cn/hashicorp/packer@v1.3.2/builder/amazon/common/step_cleanup_volumes.go (about)

     1  package common
     2  
     3  import (
     4  	"context"
     5  	"fmt"
     6  
     7  	"github.com/aws/aws-sdk-go/aws"
     8  	"github.com/aws/aws-sdk-go/service/ec2"
     9  	"github.com/hashicorp/packer/helper/multistep"
    10  	"github.com/hashicorp/packer/packer"
    11  )
    12  
    13  // stepCleanupVolumes cleans up any orphaned volumes that were not designated to
    14  // remain after termination of the instance. These volumes are typically ones
    15  // that are marked as "delete on terminate:false" in the source_ami of a build.
    16  type StepCleanupVolumes struct {
    17  	BlockDevices BlockDevices
    18  }
    19  
    20  func (s *StepCleanupVolumes) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
    21  	// stepCleanupVolumes is for Cleanup only
    22  	return multistep.ActionContinue
    23  }
    24  
    25  func (s *StepCleanupVolumes) Cleanup(state multistep.StateBag) {
    26  	ec2conn := state.Get("ec2").(*ec2.EC2)
    27  	instanceRaw := state.Get("instance")
    28  	var instance *ec2.Instance
    29  	if instanceRaw != nil {
    30  		instance = instanceRaw.(*ec2.Instance)
    31  	}
    32  	ui := state.Get("ui").(packer.Ui)
    33  	if instance == nil {
    34  		ui.Say("No volumes to clean up, skipping")
    35  		return
    36  	}
    37  
    38  	ui.Say("Cleaning up any extra volumes...")
    39  
    40  	// Collect Volume information from the cached Instance as a map of volume-id
    41  	// to device name, to compare with save list below
    42  	var vl []*string
    43  	volList := make(map[string]string)
    44  	for _, bdm := range instance.BlockDeviceMappings {
    45  		if bdm.Ebs != nil {
    46  			vl = append(vl, bdm.Ebs.VolumeId)
    47  			volList[*bdm.Ebs.VolumeId] = *bdm.DeviceName
    48  		}
    49  	}
    50  
    51  	// Using the volume list from the cached Instance, check with AWS for up to
    52  	// date information on them
    53  	resp, err := ec2conn.DescribeVolumes(&ec2.DescribeVolumesInput{
    54  		Filters: []*ec2.Filter{
    55  			{
    56  				Name:   aws.String("volume-id"),
    57  				Values: vl,
    58  			},
    59  		},
    60  	})
    61  
    62  	if err != nil {
    63  		ui.Say(fmt.Sprintf("Error describing volumes: %s", err))
    64  		return
    65  	}
    66  
    67  	// If any of the returned volumes are in a "deleting" stage or otherwise not
    68  	// available, remove them from the list of volumes
    69  	for _, v := range resp.Volumes {
    70  		if v.State != nil && *v.State != "available" {
    71  			delete(volList, *v.VolumeId)
    72  		}
    73  	}
    74  
    75  	if len(resp.Volumes) == 0 {
    76  		ui.Say("No volumes to clean up, skipping")
    77  		return
    78  	}
    79  
    80  	// Filter out any devices created as part of the launch mappings, since
    81  	// we'll let amazon follow the `delete_on_termination` setting.
    82  	for _, b := range s.BlockDevices.LaunchMappings {
    83  		for volKey, volName := range volList {
    84  			if volName == b.DeviceName {
    85  				delete(volList, volKey)
    86  			}
    87  		}
    88  	}
    89  
    90  	// Destroy remaining volumes
    91  	for k := range volList {
    92  		ui.Say(fmt.Sprintf("Destroying volume (%s)...", k))
    93  		_, err := ec2conn.DeleteVolume(&ec2.DeleteVolumeInput{VolumeId: aws.String(k)})
    94  		if err != nil {
    95  			ui.Say(fmt.Sprintf("Error deleting volume: %s", err))
    96  		}
    97  
    98  	}
    99  }