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basedomain.go
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basedomain.go
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package aws
import (
"net/http"
"sort"
"strings"
survey "github.com/AlecAivazis/survey/v2"
"github.com/AlecAivazis/survey/v2/core"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/route53"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// IsForbidden returns true if and only if the input error is an HTTP
// 403 error from the AWS API.
func IsForbidden(err error) bool {
requestError, ok := err.(awserr.RequestFailure)
return ok && requestError.StatusCode() == http.StatusForbidden
}
// GetBaseDomain returns a base domain chosen from among the account's
// public routes.
func GetBaseDomain() (string, error) {
session, err := GetSession()
if err != nil {
return "", err
}
logrus.Debugf("listing AWS hosted zones")
client := route53.New(session)
publicZoneMap := map[string]struct{}{}
exists := struct{}{}
if err := client.ListHostedZonesPages(
&route53.ListHostedZonesInput{},
func(resp *route53.ListHostedZonesOutput, lastPage bool) (shouldContinue bool) {
for _, zone := range resp.HostedZones {
if zone.Config != nil && !aws.BoolValue(zone.Config.PrivateZone) {
publicZoneMap[strings.TrimSuffix(*zone.Name, ".")] = exists
}
}
return !lastPage
},
); err != nil {
return "", errors.Wrap(err, "list hosted zones")
}
publicZones := make([]string, 0, len(publicZoneMap))
for name := range publicZoneMap {
publicZones = append(publicZones, name)
}
sort.Strings(publicZones)
if len(publicZones) == 0 {
return "", errors.New("no public Route 53 hosted zones found")
}
var domain string
if err := survey.AskOne(
&survey.Select{
Message: "Base Domain",
Help: "The base domain of the cluster. All DNS records will be sub-domains of this base and will also include the cluster name.\n\nIf you don't see you intended base-domain listed, create a new public Route53 hosted zone and rerun the installer.",
Options: publicZones,
},
&domain,
survey.WithValidator(func(ans interface{}) error {
choice := ans.(core.OptionAnswer).Value
i := sort.SearchStrings(publicZones, choice)
if i == len(publicZones) || publicZones[i] != choice {
return errors.Errorf("invalid base domain %q", choice)
}
return nil
}),
); err != nil {
return "", errors.Wrap(err, "failed UserInput")
}
return domain, nil
}
// GetPublicZone returns a public route53 zone that matches the name.
func GetPublicZone(sess *session.Session, name string) (*route53.HostedZone, error) {
var res *route53.HostedZone
f := func(resp *route53.ListHostedZonesOutput, lastPage bool) (shouldContinue bool) {
for idx, zone := range resp.HostedZones {
if zone.Config != nil && !aws.BoolValue(zone.Config.PrivateZone) && strings.TrimSuffix(aws.StringValue(zone.Name), ".") == strings.TrimSuffix(name, ".") {
res = resp.HostedZones[idx]
return false
}
}
return !lastPage
}
client := route53.New(sess)
if err := client.ListHostedZonesPages(&route53.ListHostedZonesInput{}, f); err != nil {
return nil, errors.Wrap(err, "listing hosted zones")
}
if res == nil {
return nil, errors.Errorf("No public route53 zone found matching name %q", name)
}
return res, nil
}