Golang EC2.DescribeVolumes方法代码示例

func volumeAttachmentStateRefreshFunc(conn *ec2.EC2, volumeID, instanceID string) resource.StateRefreshFunc {
	return func() (interface{}, string, error) {

		request := &ec2.DescribeVolumesInput{
			VolumeIds: []*string{aws.String(volumeID)},
			Filters: []*ec2.Filter{
				&ec2.Filter{
					Name:   aws.String("attachment.instance-id"),
					Values: []*string{aws.String(instanceID)},
				},
			},
		}

		resp, err := conn.DescribeVolumes(request)
		if err != nil {
			if awsErr, ok := err.(awserr.Error); ok {
				return nil, "failed", fmt.Errorf("code: %s, message: %s", awsErr.Code(), awsErr.Message())
			}
			return nil, "failed", err
		}

		if len(resp.Volumes) > 0 {
			v := resp.Volumes[0]
			for _, a := range v.Attachments {
				if a.InstanceId != nil && *a.InstanceId == instanceID {
					return a, *a.State, nil
				}
			}
		}
		// assume detached if volume count is 0
		return 42, "detached", nil
	}
}

func GetBackupVolumes(svc *ec2.EC2) ([]*ec2.Volume, error) {
	dvi := ec2.DescribeVolumesInput{}

	for _, tag := range tags {
		filter := &ec2.Filter{}
		filterName := "tag:" + *tag
		filter.Name = &filterName
		value := "true"
		filter.Values = []*string{&value}
		dvi.Filters = append(dvi.Filters, filter)
	}

	dvo, err := svc.DescribeVolumes(&dvi)
	if err != nil {
		return nil, fmt.Errorf("describeVolumes error, %s", err)
	}

	return dvo.Volumes, nil
}

// volumeStateRefreshFunc returns a resource.StateRefreshFunc that is used to watch
// a the state of a Volume. Returns successfully when volume is available
func volumeStateRefreshFunc(conn *ec2.EC2, volumeID string) resource.StateRefreshFunc {
	return func() (interface{}, string, error) {
		resp, err := conn.DescribeVolumes(&ec2.DescribeVolumesInput{
			VolumeIds: []*string{aws.String(volumeID)},
		})

		if err != nil {
			if ec2err, ok := err.(awserr.Error); ok {
				// Set this to nil as if we didn't find anything.
				log.Printf("Error on Volume State Refresh: message: \"%s\", code:\"%s\"", ec2err.Message(), ec2err.Code())
				resp = nil
				return nil, "", err
			} else {
				log.Printf("Error on Volume State Refresh: %s", err)
				return nil, "", err
			}
		}

		v := resp.Volumes[0]
		return v, *v.State, nil
	}
}

func readBlockDevicesFromInstance(instance *ec2.Instance, conn *ec2.EC2) (map[string]interface{}, error) {
	blockDevices := make(map[string]interface{})
	blockDevices["ebs"] = make([]map[string]interface{}, 0)
	blockDevices["root"] = nil

	instanceBlockDevices := make(map[string]*ec2.InstanceBlockDeviceMapping)
	for _, bd := range instance.BlockDeviceMappings {
		if bd.Ebs != nil {
			instanceBlockDevices[*bd.Ebs.VolumeId] = bd
		}
	}

	if len(instanceBlockDevices) == 0 {
		return nil, nil
	}

	volIDs := make([]*string, 0, len(instanceBlockDevices))
	for volID := range instanceBlockDevices {
		volIDs = append(volIDs, aws.String(volID))
	}

	// Need to call DescribeVolumes to get volume_size and volume_type for each
	// EBS block device
	volResp, err := conn.DescribeVolumes(&ec2.DescribeVolumesInput{
		VolumeIds: volIDs,
	})
	if err != nil {
		return nil, err
	}

	for _, vol := range volResp.Volumes {
		instanceBd := instanceBlockDevices[*vol.VolumeId]
		bd := make(map[string]interface{})

		if instanceBd.Ebs != nil && instanceBd.Ebs.DeleteOnTermination != nil {
			bd["delete_on_termination"] = *instanceBd.Ebs.DeleteOnTermination
		}
		if vol.Size != nil {
			bd["volume_size"] = *vol.Size
		}
		if vol.VolumeType != nil {
			bd["volume_type"] = *vol.VolumeType
		}
		if vol.Iops != nil {
			bd["iops"] = *vol.Iops
		}

		if blockDeviceIsRoot(instanceBd, instance) {
			blockDevices["root"] = bd
		} else {
			if instanceBd.DeviceName != nil {
				bd["device_name"] = *instanceBd.DeviceName
			}
			if vol.Encrypted != nil {
				bd["encrypted"] = *vol.Encrypted
			}
			if vol.SnapshotId != nil {
				bd["snapshot_id"] = *vol.SnapshotId
			}

			blockDevices["ebs"] = append(blockDevices["ebs"].([]map[string]interface{}), bd)
		}
	}

	return blockDevices, nil
}