forked from kubernetes/kops
/
delete_cluster.go
1682 lines (1391 loc) · 40.7 KB
/
delete_cluster.go
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package kutil
import (
"bufio"
"bytes"
"compress/gzip"
"encoding/base64"
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/autoscaling"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/aws/aws-sdk-go/service/elb"
"github.com/aws/aws-sdk-go/service/iam"
"github.com/aws/aws-sdk-go/service/route53"
"github.com/golang/glog"
"io"
"k8s.io/kops/upup/pkg/fi"
"k8s.io/kops/upup/pkg/fi/cloudup/awsup"
"strings"
"sync"
"time"
)
const (
TypeAutoscalingLaunchConfig = "autoscaling-config"
)
// DeleteCluster implements deletion of cluster cloud resources
// The algorithm is pretty simple: it discovers all the resources it can (primary using tags),
// and then it repeatedly attempts to delete them all until they are all deleted.
// There are a few tweaks to that approach, like choosing a default ordering, but it is not much
// smarter. Cluster deletion is a fairly rare operation anyway, and also some dependencies are invisible
// (e.g. ELB dependencies).
type DeleteCluster struct {
ClusterName string
Cloud fi.Cloud
}
type ResourceTracker struct {
Name string
Type string
ID string
blocks []string
blocked []string
done bool
deleter func(cloud fi.Cloud, tracker *ResourceTracker) error
groupKey string
groupDeleter func(cloud fi.Cloud, trackers []*ResourceTracker) error
obj interface{}
}
type listFn func(fi.Cloud, string) ([]*ResourceTracker, error)
func gunzipBytes(d []byte) ([]byte, error) {
var out bytes.Buffer
in := bytes.NewReader(d)
r, err := gzip.NewReader(in)
if err != nil {
return nil, fmt.Errorf("error building gunzip reader: %v", err)
}
defer r.Close()
_, err = io.Copy(&out, r)
if err != nil {
return nil, fmt.Errorf("error decompressing data: %v", err)
}
return out.Bytes(), nil
}
func buildEC2Filters(cloud fi.Cloud) []*ec2.Filter {
awsCloud := cloud.(awsup.AWSCloud)
tags := awsCloud.Tags()
var filters []*ec2.Filter
for k, v := range tags {
filter := awsup.NewEC2Filter("tag:"+k, v)
filters = append(filters, filter)
}
return filters
}
func (c *DeleteCluster) ListResources() (map[string]*ResourceTracker, error) {
cloud := c.Cloud.(awsup.AWSCloud)
resources := make(map[string]*ResourceTracker)
listFunctions := []listFn{
// EC2
ListInstances,
ListKeypairs,
ListSecurityGroups,
ListVolumes,
// EC2 VPC
ListDhcpOptions,
ListInternetGateways,
ListRouteTables,
ListSubnets,
ListVPCs,
// ELBs
ListELBs,
// ASG
ListAutoScalingGroups,
ListAutoScalingLaunchConfigurations,
// Route 53
ListRoute53Records,
// IAM
ListIAMInstanceProfiles,
ListIAMRoles,
}
for _, fn := range listFunctions {
trackers, err := fn(cloud, c.ClusterName)
if err != nil {
return nil, err
}
for _, t := range trackers {
resources[t.Type+":"+t.ID] = t
}
}
{
// Gateways weren't tagged in kube-up
// If we are deleting the VPC, we should delete the attached gateway
// (no real reason not to; easy to recreate; no real state etc)
gateways, err := DescribeInternetGatewaysIgnoreTags(cloud)
if err != nil {
return nil, err
}
for _, igw := range gateways {
for _, attachment := range igw.Attachments {
vpcID := aws.StringValue(attachment.VpcId)
igwID := aws.StringValue(igw.InternetGatewayId)
if vpcID == "" || igwID == "" {
continue
}
if resources["vpc:"+vpcID] != nil && resources["internet-gateway:"+igwID] == nil {
resources["internet-gateway:"+igwID] = &ResourceTracker{
Name: FindName(igw.Tags),
ID: igwID,
Type: "internet-gateway",
deleter: DeleteInternetGateway,
}
}
}
}
}
for k, t := range resources {
if t.done {
delete(resources, k)
}
}
return resources, nil
}
func (c *DeleteCluster) DeleteResources(resources map[string]*ResourceTracker) error {
depMap := make(map[string][]string)
done := make(map[string]*ResourceTracker)
var mutex sync.Mutex
for k, t := range resources {
for _, block := range t.blocks {
depMap[block] = append(depMap[block], k)
}
for _, blocked := range t.blocked {
depMap[k] = append(depMap[k], blocked)
}
if t.done {
done[k] = t
}
}
glog.V(2).Infof("Dependencies")
for k, v := range depMap {
glog.V(2).Infof("\t%s\t%v", k, v)
}
iterationsWithNoProgress := 0
for {
// TODO: Some form of default ordering based on types?
// TODO: Give up eventually?
failed := make(map[string]*ResourceTracker)
for {
phase := make(map[string]*ResourceTracker)
for k, r := range resources {
if _, d := done[k]; d {
continue
}
if _, d := failed[k]; d {
// Only attempt each resource once per pass
continue
}
ready := true
for _, dep := range depMap[k] {
if _, d := done[dep]; !d {
glog.V(4).Infof("dependency %q of %q not deleted; skipping", dep, k)
ready = false
}
}
if !ready {
continue
}
phase[k] = r
}
if len(phase) == 0 {
break
}
groups := make(map[string][]*ResourceTracker)
for k, t := range phase {
groupKey := t.groupKey
if groupKey == "" {
groupKey = "_" + k
}
groups[groupKey] = append(groups[groupKey], t)
}
var wg sync.WaitGroup
for _, trackers := range groups {
wg.Add(1)
go func(trackers []*ResourceTracker) {
mutex.Lock()
for _, t := range trackers {
k := t.Type + ":" + t.ID
failed[k] = t
}
mutex.Unlock()
defer wg.Done()
human := trackers[0].Type + ":" + trackers[0].ID
var err error
if trackers[0].groupDeleter != nil {
err = trackers[0].groupDeleter(c.Cloud, trackers)
} else {
if len(trackers) != 1 {
glog.Fatalf("found group without groupKey")
}
err = trackers[0].deleter(c.Cloud, trackers[0])
}
if err != nil {
mutex.Lock()
if IsDependencyViolation(err) {
fmt.Printf("%s\tstill has dependencies, will retry\n", human)
glog.V(4).Infof("API call made when had dependency: %s", human)
} else {
fmt.Printf("%s\terror deleting resource, will retry: %v\n", human, err)
}
for _, t := range trackers {
k := t.Type + ":" + t.ID
failed[k] = t
}
mutex.Unlock()
} else {
mutex.Lock()
fmt.Printf("%s\tok\n", human)
iterationsWithNoProgress = 0
for _, t := range trackers {
k := t.Type + ":" + t.ID
delete(failed, k)
done[k] = t
}
mutex.Unlock()
}
}(trackers)
}
wg.Wait()
}
if len(resources) == len(done) {
return nil
}
fmt.Printf("Not all resources deleted; waiting before reattempting deletion\n")
for k := range resources {
if _, d := done[k]; d {
continue
}
fmt.Printf("\t%s\n", k)
}
iterationsWithNoProgress++
if iterationsWithNoProgress > 30 {
return fmt.Errorf("Not making progress deleting resources; giving up")
}
time.Sleep(10 * time.Second)
}
}
func matchesAsgTags(tags map[string]string, actual []*autoscaling.TagDescription) bool {
for k, v := range tags {
found := false
for _, a := range actual {
if aws.StringValue(a.Key) == k {
if aws.StringValue(a.Value) == v {
found = true
break
}
}
}
if !found {
return false
}
}
return true
}
func matchesElbTags(tags map[string]string, actual []*elb.Tag) bool {
for k, v := range tags {
found := false
for _, a := range actual {
if aws.StringValue(a.Key) == k {
if aws.StringValue(a.Value) == v {
found = true
break
}
}
}
if !found {
return false
}
}
return true
}
//type DeletableResource interface {
// Delete(cloud fi.Cloud) error
//}
func DeleteInstance(cloud fi.Cloud, t *ResourceTracker) error {
c := cloud.(awsup.AWSCloud)
id := t.ID
glog.V(2).Infof("Deleting EC2 instance %q", id)
request := &ec2.TerminateInstancesInput{
InstanceIds: []*string{&id},
}
_, err := c.EC2().TerminateInstances(request)
if err != nil {
if awsup.AWSErrorCode(err) == "InvalidInstanceID.NotFound" {
glog.V(2).Infof("Got InvalidInstanceID.NotFound error deleting instance %q; will treat as already-deleted", id)
} else {
return fmt.Errorf("error deleting Instance %q: %v", id, err)
}
}
return nil
}
func ListInstances(cloud fi.Cloud, clusterName string) ([]*ResourceTracker, error) {
c := cloud.(awsup.AWSCloud)
glog.V(2).Infof("Querying EC2 instances")
request := &ec2.DescribeInstancesInput{
Filters: buildEC2Filters(cloud),
}
var trackers []*ResourceTracker
err := c.EC2().DescribeInstancesPages(request, func(p *ec2.DescribeInstancesOutput, lastPage bool) bool {
for _, reservation := range p.Reservations {
for _, instance := range reservation.Instances {
id := aws.StringValue(instance.InstanceId)
if instance.State != nil {
stateName := aws.StringValue(instance.State.Name)
switch stateName {
case "terminated":
case "shutting-down":
continue
case "running":
case "stopped":
// We need to delete
glog.V(4).Infof("instance %q has state=%q", id, stateName)
default:
glog.Infof("unknown instance state for %q: %q", id, stateName)
}
}
tracker := &ResourceTracker{
Name: FindName(instance.Tags),
ID: id,
Type: "instance",
deleter: DeleteInstance,
}
var blocks []string
blocks = append(blocks, "vpc:"+aws.StringValue(instance.VpcId))
for _, volume := range instance.BlockDeviceMappings {
if volume.Ebs == nil {
continue
}
blocks = append(blocks, "volume:"+aws.StringValue(volume.Ebs.VolumeId))
}
for _, sg := range instance.SecurityGroups {
blocks = append(blocks, "security-group:"+aws.StringValue(sg.GroupId))
}
blocks = append(blocks, "subnet:"+aws.StringValue(instance.SubnetId))
blocks = append(blocks, "vpc:"+aws.StringValue(instance.VpcId))
tracker.blocks = blocks
trackers = append(trackers, tracker)
}
}
return true
})
if err != nil {
return nil, fmt.Errorf("error describing instances: %v", err)
}
return trackers, nil
}
func DeleteSecurityGroup(cloud fi.Cloud, t *ResourceTracker) error {
c := cloud.(awsup.AWSCloud)
id := t.ID
// First clear all inter-dependent rules
// TODO: Move to a "pre-execute" phase?
{
request := &ec2.DescribeSecurityGroupsInput{
GroupIds: []*string{&id},
}
response, err := c.EC2().DescribeSecurityGroups(request)
if err != nil {
return fmt.Errorf("error describing SecurityGroup %q: %v", id, err)
}
if len(response.SecurityGroups) == 0 {
return nil
}
if len(response.SecurityGroups) != 1 {
return fmt.Errorf("found mutiple SecurityGroups with ID %q", id)
}
sg := response.SecurityGroups[0]
if len(sg.IpPermissions) != 0 {
revoke := &ec2.RevokeSecurityGroupIngressInput{
GroupId: &id,
IpPermissions: sg.IpPermissions,
}
_, err = c.EC2().RevokeSecurityGroupIngress(revoke)
if err != nil {
return fmt.Errorf("cannot revoke ingress for ID %q: %v", id, err)
}
}
}
{
glog.V(2).Infof("Deleting EC2 SecurityGroup %q", id)
request := &ec2.DeleteSecurityGroupInput{
GroupId: &id,
}
_, err := c.EC2().DeleteSecurityGroup(request)
if err != nil {
if IsDependencyViolation(err) {
return err
}
return fmt.Errorf("error deleting SecurityGroup %q: %v", id, err)
}
}
return nil
}
func ListSecurityGroups(cloud fi.Cloud, clusterName string) ([]*ResourceTracker, error) {
groups, err := DescribeSecurityGroups(cloud)
if err != nil {
return nil, err
}
var trackers []*ResourceTracker
for _, sg := range groups {
tracker := &ResourceTracker{
Name: FindName(sg.Tags),
ID: aws.StringValue(sg.GroupId),
Type: "security-group",
deleter: DeleteSecurityGroup,
}
var blocks []string
blocks = append(blocks, "vpc:"+aws.StringValue(sg.VpcId))
tracker.blocks = blocks
trackers = append(trackers, tracker)
}
return trackers, nil
}
func DescribeSecurityGroups(cloud fi.Cloud) ([]*ec2.SecurityGroup, error) {
c := cloud.(awsup.AWSCloud)
glog.V(2).Infof("Listing EC2 SecurityGroups")
request := &ec2.DescribeSecurityGroupsInput{
Filters: buildEC2Filters(cloud),
}
response, err := c.EC2().DescribeSecurityGroups(request)
if err != nil {
return nil, fmt.Errorf("error listing SecurityGroups: %v", err)
}
return response.SecurityGroups, nil
}
func DeleteVolume(cloud fi.Cloud, r *ResourceTracker) error {
c := cloud.(awsup.AWSCloud)
id := r.ID
glog.V(2).Infof("Deleting EC2 Volume %q", id)
request := &ec2.DeleteVolumeInput{
VolumeId: &id,
}
_, err := c.EC2().DeleteVolume(request)
if err != nil {
if IsDependencyViolation(err) {
return err
}
if awsup.AWSErrorCode(err) == "InvalidVolume.NotFound" {
// Concurrently deleted
return nil
}
return fmt.Errorf("error deleting Volume %q: %v", id, err)
}
return nil
}
func ListVolumes(cloud fi.Cloud, clusterName string) ([]*ResourceTracker, error) {
c := cloud.(awsup.AWSCloud)
volumes, err := DescribeVolumes(cloud)
if err != nil {
return nil, err
}
var trackers []*ResourceTracker
elasticIPs := make(map[string]bool)
for _, volume := range volumes {
id := aws.StringValue(volume.VolumeId)
tracker := &ResourceTracker{
Name: FindName(volume.Tags),
ID: id,
Type: "volume",
deleter: DeleteVolume,
}
var blocks []string
//blocks = append(blocks, "vpc:" + aws.StringValue(rt.VpcId))
tracker.blocks = blocks
trackers = append(trackers, tracker)
// Check for an elastic IP tag
for _, tag := range volume.Tags {
name := aws.StringValue(tag.Key)
ip := ""
if name == "kubernetes.io/master-ip" {
ip = aws.StringValue(tag.Value)
}
if ip != "" {
elasticIPs[ip] = true
}
}
}
if len(elasticIPs) != 0 {
glog.V(2).Infof("Querying EC2 Elastic IPs")
request := &ec2.DescribeAddressesInput{}
response, err := c.EC2().DescribeAddresses(request)
if err != nil {
return nil, fmt.Errorf("error describing addresses: %v", err)
}
for _, address := range response.Addresses {
ip := aws.StringValue(address.PublicIp)
if !elasticIPs[ip] {
continue
}
tracker := &ResourceTracker{
Name: ip,
ID: aws.StringValue(address.AllocationId),
Type: "elastic-ip",
deleter: DeleteElasticIP,
}
trackers = append(trackers, tracker)
}
}
return trackers, nil
}
func DescribeVolumes(cloud fi.Cloud) ([]*ec2.Volume, error) {
c := cloud.(awsup.AWSCloud)
var volumes []*ec2.Volume
glog.V(2).Infof("Listing EC2 Volumes")
request := &ec2.DescribeVolumesInput{
Filters: buildEC2Filters(c),
}
err := c.EC2().DescribeVolumesPages(request, func(p *ec2.DescribeVolumesOutput, lastPage bool) bool {
for _, volume := range p.Volumes {
volumes = append(volumes, volume)
}
return true
})
if err != nil {
return nil, fmt.Errorf("error describing volumes: %v", err)
}
return volumes, nil
}
func DeleteKeypair(cloud fi.Cloud, r *ResourceTracker) error {
c := cloud.(awsup.AWSCloud)
name := r.Name
glog.V(2).Infof("Deleting EC2 Keypair %q", name)
request := &ec2.DeleteKeyPairInput{
KeyName: &name,
}
_, err := c.EC2().DeleteKeyPair(request)
if err != nil {
return fmt.Errorf("error deleting KeyPair %q: %v", name, err)
}
return nil
}
func ListKeypairs(cloud fi.Cloud, clusterName string) ([]*ResourceTracker, error) {
c := cloud.(awsup.AWSCloud)
keypairName := "kubernetes." + clusterName
glog.V(2).Infof("Listing EC2 Keypairs")
request := &ec2.DescribeKeyPairsInput{
// We need to match both the name and a prefix
//Filters: []*ec2.Filter{awsup.NewEC2Filter("key-name", keypairName)},
}
response, err := c.EC2().DescribeKeyPairs(request)
if err != nil {
return nil, fmt.Errorf("error listing KeyPairs: %v", err)
}
var trackers []*ResourceTracker
for _, keypair := range response.KeyPairs {
name := aws.StringValue(keypair.KeyName)
if name != keypairName && !strings.HasPrefix(name, keypairName+"-") {
continue
}
tracker := &ResourceTracker{
Name: name,
ID: name,
Type: "keypair",
deleter: DeleteKeypair,
}
trackers = append(trackers, tracker)
}
return trackers, nil
}
func IsDependencyViolation(err error) bool {
code := awsup.AWSErrorCode(err)
switch code {
case "":
return false
case "DependencyViolation", "VolumeInUse", "InvalidIPAddress.InUse":
return true
default:
glog.Infof("unexpected aws error code: %q", code)
return false
}
}
func DeleteSubnet(cloud fi.Cloud, tracker *ResourceTracker) error {
c := cloud.(awsup.AWSCloud)
id := tracker.ID
glog.V(2).Infof("Deleting EC2 Subnet %q", id)
request := &ec2.DeleteSubnetInput{
SubnetId: &id,
}
_, err := c.EC2().DeleteSubnet(request)
if err != nil {
if IsDependencyViolation(err) {
return err
}
return fmt.Errorf("error deleting Subnet %q: %v", id, err)
}
return nil
}
func ListSubnets(cloud fi.Cloud, clusterName string) ([]*ResourceTracker, error) {
subnets, err := DescribeSubnets(cloud)
if err != nil {
return nil, fmt.Errorf("error listing subnets: %v", err)
}
var trackers []*ResourceTracker
for _, subnet := range subnets {
tracker := &ResourceTracker{
Name: FindName(subnet.Tags),
ID: aws.StringValue(subnet.SubnetId),
Type: "subnet",
deleter: DeleteSubnet,
}
var blocks []string
blocks = append(blocks, "vpc:"+aws.StringValue(subnet.VpcId))
tracker.blocks = blocks
trackers = append(trackers, tracker)
}
return trackers, nil
}
func DescribeSubnets(cloud fi.Cloud) ([]*ec2.Subnet, error) {
c := cloud.(awsup.AWSCloud)
glog.V(2).Infof("Listing EC2 subnets")
request := &ec2.DescribeSubnetsInput{
Filters: buildEC2Filters(cloud),
}
response, err := c.EC2().DescribeSubnets(request)
if err != nil {
return nil, fmt.Errorf("error listing subnets: %v", err)
}
return response.Subnets, nil
}
func DeleteRouteTable(cloud fi.Cloud, r *ResourceTracker) error {
c := cloud.(awsup.AWSCloud)
id := r.ID
glog.V(2).Infof("Deleting EC2 RouteTable %q", id)
request := &ec2.DeleteRouteTableInput{
RouteTableId: &id,
}
_, err := c.EC2().DeleteRouteTable(request)
if err != nil {
if IsDependencyViolation(err) {
return err
}
return fmt.Errorf("error deleting RouteTable %q: %v", id, err)
}
return nil
}
func ListRouteTables(cloud fi.Cloud, clusterName string) ([]*ResourceTracker, error) {
c := cloud.(awsup.AWSCloud)
glog.V(2).Infof("Listing EC2 RouteTables")
request := &ec2.DescribeRouteTablesInput{
Filters: buildEC2Filters(cloud),
}
response, err := c.EC2().DescribeRouteTables(request)
if err != nil {
return nil, fmt.Errorf("error listing RouteTables: %v", err)
}
var trackers []*ResourceTracker
for _, rt := range response.RouteTables {
tracker := &ResourceTracker{
Name: FindName(rt.Tags),
ID: aws.StringValue(rt.RouteTableId),
Type: "route-table",
deleter: DeleteRouteTable,
}
var blocks []string
var blocked []string
blocks = append(blocks, "vpc:"+aws.StringValue(rt.VpcId))
for _, a := range rt.Associations {
blocked = append(blocked, "subnet:"+aws.StringValue(a.SubnetId))
}
tracker.blocks = blocks
tracker.blocked = blocked
trackers = append(trackers, tracker)
}
return trackers, nil
}
func DeleteDhcpOptions(cloud fi.Cloud, r *ResourceTracker) error {
c := cloud.(awsup.AWSCloud)
id := r.ID
glog.V(2).Infof("Deleting EC2 DhcpOptions %q", id)
request := &ec2.DeleteDhcpOptionsInput{
DhcpOptionsId: &id,
}
_, err := c.EC2().DeleteDhcpOptions(request)
if err != nil {
if IsDependencyViolation(err) {
return err
}
return fmt.Errorf("error deleting DhcpOptions %q: %v", id, err)
}
return nil
}
func ListDhcpOptions(cloud fi.Cloud, clusterName string) ([]*ResourceTracker, error) {
dhcpOptions, err := DescribeDhcpOptions(cloud)
if err != nil {
return nil, err
}
var trackers []*ResourceTracker
for _, o := range dhcpOptions {
tracker := &ResourceTracker{
Name: FindName(o.Tags),
ID: aws.StringValue(o.DhcpOptionsId),
Type: "dhcp-options",
deleter: DeleteDhcpOptions,
}
var blocks []string
tracker.blocks = blocks
trackers = append(trackers, tracker)
}
return trackers, nil
}
func DescribeDhcpOptions(cloud fi.Cloud) ([]*ec2.DhcpOptions, error) {
c := cloud.(awsup.AWSCloud)
glog.V(2).Infof("Listing EC2 DhcpOptions")
request := &ec2.DescribeDhcpOptionsInput{
Filters: buildEC2Filters(cloud),
}
response, err := c.EC2().DescribeDhcpOptions(request)
if err != nil {
return nil, fmt.Errorf("error listing DhcpOptions: %v", err)
}
return response.DhcpOptions, nil
}
func DeleteInternetGateway(cloud fi.Cloud, r *ResourceTracker) error {
c := cloud.(awsup.AWSCloud)
id := r.ID
var igw *ec2.InternetGateway
{
request := &ec2.DescribeInternetGatewaysInput{
InternetGatewayIds: []*string{&id},
}
response, err := c.EC2().DescribeInternetGateways(request)
if err != nil {
if awsup.AWSErrorCode(err) == "InvalidInternetGatewayID.NotFound" {
glog.Infof("Internet gateway %q not found; assuming already deleted", id)
return nil
}
return fmt.Errorf("error describing InternetGateway %q: %v", id, err)
}
if response == nil || len(response.InternetGateways) == 0 {
return nil
}
if len(response.InternetGateways) != 1 {
return fmt.Errorf("found multiple InternetGateways with id %q", id)
}
igw = response.InternetGateways[0]
}
for _, a := range igw.Attachments {
glog.V(2).Infof("Detaching EC2 InternetGateway %q", id)
request := &ec2.DetachInternetGatewayInput{
InternetGatewayId: &id,
VpcId: a.VpcId,
}
_, err := c.EC2().DetachInternetGateway(request)
if err != nil {
if IsDependencyViolation(err) {
return err
}
return fmt.Errorf("error detaching InternetGateway %q: %v", id, err)
}
}
{
glog.V(2).Infof("Deleting EC2 InternetGateway %q", id)
request := &ec2.DeleteInternetGatewayInput{
InternetGatewayId: &id,
}
_, err := c.EC2().DeleteInternetGateway(request)
if err != nil {
if IsDependencyViolation(err) {
return err
}
if awsup.AWSErrorCode(err) == "InvalidInternetGatewayID.NotFound" {
glog.Infof("Internet gateway %q not found; assuming already deleted", id)
return nil
}
return fmt.Errorf("error deleting InternetGateway %q: %v", id, err)
}
}
return nil
}
func ListInternetGateways(cloud fi.Cloud, clusterName string) ([]*ResourceTracker, error) {
gateways, err := DescribeInternetGateways(cloud)
if err != nil {
return nil, err
}
var trackers []*ResourceTracker
for _, o := range gateways {
tracker := &ResourceTracker{
Name: FindName(o.Tags),
ID: aws.StringValue(o.InternetGatewayId),
Type: "internet-gateway",
deleter: DeleteInternetGateway,
}
var blocks []string
for _, a := range o.Attachments {
if aws.StringValue(a.VpcId) != "" {
blocks = append(blocks, "vpc:"+aws.StringValue(a.VpcId))
}
}
tracker.blocks = blocks
trackers = append(trackers, tracker)
}
return trackers, nil
}
func DescribeInternetGateways(cloud fi.Cloud) ([]*ec2.InternetGateway, error) {
c := cloud.(awsup.AWSCloud)
glog.V(2).Infof("Listing EC2 InternetGateways")
request := &ec2.DescribeInternetGatewaysInput{
Filters: buildEC2Filters(cloud),
}
response, err := c.EC2().DescribeInternetGateways(request)
if err != nil {
return nil, fmt.Errorf("error listing InternetGateway: %v", err)
}
var gateways []*ec2.InternetGateway
for _, o := range response.InternetGateways {
gateways = append(gateways, o)
}