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dakatsuka/ec2_ddns.sh

Created November 29, 2011 06:48
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EC2でDDNS
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ec2_ddns.sh
#!/bin/sh
DNS_KEY=/path/to/example.com.key
DOMAIN=example.com
USER_DATA=`/usr/bin/curl -s http://169.254.169.254/latest/user-data`
HOSTNAME=`echo $USER_DATA`
hostname $HOSTNAME.$DOMAIN
LOCIP=`/usr/bin/curl -s http://169.254.169.254/latest/meta-data/local-ipv4`
echo $DNS_KEY
cat<<EOF | /usr/bin/nsupdate -k $DNS_KEY -v
server dns1.$DOMAIN
update delete $HOSTNAME.$DOMAIN A
update add $HOSTNAME.$DOMAIN 60 A $LOCIP
send
EOF
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