Bash script to generate an S3 redirect and R53 alias

r53-s3-redirect.sh

#!/usr/bin/env bash

function makeBucket() {
  echo "Making S3 bucket for ${DOMAIN}..."
  aws s3 mb s3://${DOMAIN}
}

# Trim any erroneous whitespace from variable
DOMAIN="${DOMAIN//[[:space:]]/}"

# Create s3.json
cat <<EOF >> s3.json
{
    "RedirectAllRequestsTo": {
        "HostName": "www.${DOMAIN}"
    }
}
EOF

# Test for s3 bucket existence
bucket_exists=$(aws s3 ls | grep -w ${DOMAIN} -c)

if [ $bucket_exists ne 0 ]; then
	makeBucket
fi

# Configure the bucket to redirect all traffic to www.hostname
aws s3api put-bucket-website --bucket ${DOMAIN} --website-configuration file://s3.json

# Create the Route53 Hosted Zone
R53OP=$(aws route53 create-hosted-zone --name ${DOMAIN} --caller-reference gd-jenkins-$(date +%Y%m%dT%H%M%S) --hosted-zone-config Comment="${COMMENT}")

# Grab the new hosted zone id
HZ=$(echo $R53OP | grep -Eio '(hostedzone/([^"]*))' | head -1 | sed 's/hostedzone\///g')

sleep 4

# Add CNAME and ALIAS records
cat <<EOF >> r53batch.json
{
	"Comment": "Add CNAME and ALIAS",
	"Changes": [{
			"Action": "CREATE",
			"ResourceRecordSet": {
				"Name": "${DOMAIN}",
				"Type": "A",
				"AliasTarget": {
					"HostedZoneId": "Z3BJ6K6RIION7M",
					"DNSName": "s3-website-us-west-2.amazonaws.com",
					"EvaluateTargetHealth": false
				}
			}
		},
		{
			"Action": "CREATE",
			"ResourceRecordSet": {
				"Name": "www.${DOMAIN}",
				"Type": "CNAME",
				"TTL": 300,
				"ResourceRecords": [{
					"Value": "unbouncepages.com"
				}]
			}
		}
	]
}
EOF

aws route53 change-resource-record-sets --hosted-zone-id ${HZ} --change-batch file://r53batch.json