vi dockerfile_ddns
FROM ubuntu:latest
RUN apt-get update && apt-get install bind9 vim curl dnsutils cron -y && apt-get clean -y && rm -r /var/lib/apt/lists/*
RUN touch /root/do-nsupdate && chmod 755 /root/do-nsupdate && echo '*/5 * * * * root /root/do-nsupdate' >> /etc/crontab
CMD service cron start && tail -f /var/log/lastlog
docker build -f dockerfile_ddns -t ddns --no-cache=true .
vi dockercompose_ddns.yml
services:
service:
image: ddns:latest
volumes:
- volume:/root
restart: unless-stopped
container_name: DDNS_TKO
network_mode: bridge
# command:
# - sleep
# - infinity
volumes:
volume:
driver: local
docker compose -p ddns -f dockercompose_ddns.yml up -d
docker exec -it DDNS_Home bash
vi /root/do-nsupdate
#!/bin/bash
updateServer=ns1.mybind9nameserver.com
updateDomain=mydomain.com
encryptKeyPath="/root/mydomain.com.key"
checkIPWeb="http://checkip.amazonaws.com/"
CURRENT_IP=$(nslookup $updateDomain $updateServer| grep Address | grep -v "#53")
CURRENT_IP=$(echo ${CURRENT_IP:9})
EXT_IP=$(curl $checkIPWeb)
if [ $CURRENT_IP != $EXT_IP ]; then
KEY=$encryptKeyPath
cat <<EOF | nsupdate -k “$KEY"
server $updateServer
update delete $updateDomain. A
update add $updateDomain. 3600 A $EXT_IP
send
EOF
fi
