/
aws.go
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/
aws.go
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package internal
import (
"context"
"errors"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/ec2"
ec2Types "github.com/aws/aws-sdk-go-v2/service/ec2/types"
"github.com/aws/smithy-go"
logger "github.com/sirupsen/logrus"
)
const awsEC2Volume = "AWS::EC2::Volume"
type Ec2client interface {
DescribeInstances(ctx context.Context, params *ec2.DescribeInstancesInput, optFns ...func(*ec2.Options)) (*ec2.DescribeInstancesOutput, error)
DescribeImages(ctx context.Context, params *ec2.DescribeImagesInput, optFns ...func(*ec2.Options)) (*ec2.DescribeImagesOutput, error)
DeregisterImage(ctx context.Context, params *ec2.DeregisterImageInput, optFns ...func(*ec2.Options)) (*ec2.DeregisterImageOutput, error)
DescribeLaunchTemplateVersions(ctx context.Context, params *ec2.DescribeLaunchTemplateVersionsInput, optFns ...func(*ec2.Options)) (*ec2.DescribeLaunchTemplateVersionsOutput, error)
DescribeVolumes(ctx context.Context, params *ec2.DescribeVolumesInput, optFns ...func(*ec2.Options)) (*ec2.DescribeVolumesOutput, error)
DeleteVolume(ctx context.Context, params *ec2.DeleteVolumeInput, optFns ...func(*ec2.Options)) (*ec2.DeleteVolumeOutput, error)
}
type AWS struct {
ec2 Ec2client
}
func NewFromInterface(ec2 Ec2client) *AWS {
return &AWS{
ec2: ec2,
}
}
func NewAWSClient(conf func(ctx context.Context, optFns ...func(*config.LoadOptions) error) (cfg aws.Config, err error),
ec2InitFunc func(cfg aws.Config, optFns ...func(*ec2.Options)) *ec2.Client) *AWS {
aws := &AWS{}
cfg, err := conf(context.TODO())
CheckError(err, logger.Fatalf)
aws.ec2 = ec2InitFunc(cfg)
return aws
}
func (a *AWS) GetUsedAMIsFromEC2() []string {
usedImages := []string{}
nextToken := ""
for {
opts := &ec2.DescribeInstancesInput{}
if nextToken != "" {
opts.NextToken = &nextToken
}
ec2Instances, err := a.ec2.DescribeInstances(context.TODO(), opts)
CheckError(err, logger.Errorf)
if ec2Instances != nil {
for _, reserveration := range ec2Instances.Reservations {
for _, instance := range reserveration.Instances {
usedImages = UniqueAppend(usedImages, *instance.ImageId)
}
}
}
if ec2Instances == nil || ec2Instances.NextToken == nil {
break
}
nextToken = *ec2Instances.NextToken
}
logger.Debug("UsedImages[] from EC2", usedImages)
return usedImages
}
func (a *AWS) GetUsedAMIsFromLaunchTpls() []string {
usedImages := []string{}
nextToken := ""
for {
opts := &ec2.DescribeLaunchTemplateVersionsInput{
Versions: []string{"$Latest"},
}
if nextToken != "" {
opts.NextToken = &nextToken
}
launchTpls, err := a.ec2.DescribeLaunchTemplateVersions(context.TODO(), opts)
CheckError(err, logger.Errorf)
if launchTpls != nil {
for _, launchTplVersion := range launchTpls.LaunchTemplateVersions {
if launchTplVersion.LaunchTemplateData.ImageId != nil {
usedImages = append(usedImages, *launchTplVersion.LaunchTemplateData.ImageId)
}
}
}
if launchTpls == nil || launchTpls.NextToken == nil {
break
}
nextToken = *launchTpls.NextToken
}
logger.Debug("UsedImages[] from Launch Templates", usedImages)
return usedImages
}
func (a AWS) DescribeImages(accountId string) ([]ec2Types.Image, error) {
describeImageInput := &ec2.DescribeImagesInput{Owners: []string{"self"}}
if accountId != "" {
describeImageInput.Owners = append(describeImageInput.Owners, accountId)
}
imagesOutput, err := a.ec2.DescribeImages(context.TODO(), describeImageInput)
if err != nil {
return nil, err
}
return imagesOutput.Images, nil
}
func (a AWS) DeregisterImage(imageId string, dryRun bool) error {
deregisterInput := &ec2.DeregisterImageInput{
ImageId: &imageId,
DryRun: &dryRun,
}
_, err := a.ec2.DeregisterImage(context.TODO(), deregisterInput)
return err
}
func (a AWS) GetAvailableEBSVolumes() []ec2Types.Volume {
volumes := []ec2Types.Volume{}
nextToken := ""
for {
opts := &ec2.DescribeVolumesInput{}
if nextToken != "" {
opts.NextToken = &nextToken
}
volumeOutput, err := a.ec2.DescribeVolumes(context.TODO(), opts)
CheckError(err, logger.Errorf)
if volumeOutput != nil {
volumes = append(volumes, volumeOutput.Volumes...)
}
if volumeOutput == nil || volumeOutput.NextToken == nil {
break
}
nextToken = *volumeOutput.NextToken
}
return volumes
}
func (a AWS) DeleteVolume(volumeId string, dryrun bool) error {
opts := &ec2.DeleteVolumeInput{
VolumeId: &volumeId,
DryRun: &dryrun,
}
_, err := a.ec2.DeleteVolume(context.TODO(), opts)
return err
}
func CheckError(err error, logFunc func(tpl string, args ...interface{})) {
if err != nil {
var ae smithy.APIError
if errors.As(err, &ae) {
logFunc("code: %s, message: %s, fault: %s", ae.ErrorCode(), ae.ErrorMessage(), ae.ErrorFault().String())
} else {
logFunc(err.Error())
}
}
}