The goal of this how-to is to demonstrate adding a CNAME to a domain in Amazon's Route53 service.
Setup a new hosted zone by going to the Route53 home in your AWS account
Assuming you're registering a new domain, you'll get an email confirming your email address. Follow the steps, Amazon will notify you once it's ready.
Once you have your domain registered, you'll get a Hosted Zone Id. Keep it ready, you'll need it in a bit.
The AWS go-sdk requires you to setup the credentials in ~/.aws/credentials.
[default]
aws_access_key_id = [your access key id]
aws_secret_access_key = [your secret access key]
This is actually a pretty straightforward common task, but I haven't found good documentation on it, so here goes.
I've stripped down the AWS sdk examples to just the bare minimum for setting up a CNAME record.
I'm using the UPSERT Action, which will automatically insert or update. Name is the domain name you're adding the CNAME for. Target is the destination of the CNAME record. You can also add a TTL.
func createCNAME(svc *route53.Route53) {
...
params := &route53.ChangeResourceRecordSetsInput{
ChangeBatch: &route53.ChangeBatch{ // Required
Changes: []*route53.Change{ // Required
{ // Required
Action: aws.String("UPSERT"), // Required
ResourceRecordSet: &route53.ResourceRecordSet{ // Required
Name: aws.String(name), // Required
Type: aws.String("CNAME"), // Required
ResourceRecords: []*route53.ResourceRecord{
{ // Required
Value: aws.String(target), // Required
},
},
TTL: aws.Int64(TTL),
Weight: aws.Int64(weight),
SetIdentifier: aws.String("Arbitrary Id describing this change set"),
},
},
},
Comment: aws.String("Sample update."),
},
HostedZoneId: aws.String(zoneId), // Required
}
resp, err := svc.ChangeResourceRecordSets(params)
...I can't figure out how to get this query to constrain results. If you've got a suggestion, let me know.
func listCNAMES(svc *route53.Route53) {
...
listParams := &route53.ListResourceRecordSetsInput{
HostedZoneId: aws.String(zoneId), // Required
...
}
respList, err := svc.ListResourceRecordSets(listParams)
...
}go run cname-example.go -d www.your-domain.com -t your-domain.com -z [Your Zone Id]
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