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https://github.com/aaronriedel/hetzner-ddns.git
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3 changed files with 187 additions and 0 deletions
1
README.md
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1
README.md
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DDNS scripts for legacy IP and real IP for Hetzner DNS API written in Bash
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ddns4.sh
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ddns4.sh
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#!/bin/bash
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##########################################################################################
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# SETTINGS
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HETZNER_API_TOKEN="" # https://dns.hetzner.com/settings/api-token
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SERVERNAME="" # desired subdomain e.g. "server1"
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DNSZONE="" # name of the zone in DNS Console e.g. "example.com"
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##########################################################################################
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command_exists() {
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command -v "$1" >/dev/null 2>&1
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if [[ $? -ne 0 ]]; then
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echo "Software dependency not met: $1"
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exit 1
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fi
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}
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for COMMAND in "curl" "jq" "grep"; do
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command_exists "${COMMAND}"
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done
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#############################################
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#HTTP Response Code Echo
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response_code() {
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if [ $1 == "200" ]; then echo "$1 Success";
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elif [ $1 == "401" ]; then echo "$1 Unauthorized" && exit 1;
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elif [ $1 == "403" ]; then echo "$1 Forbidden" && exit 1;
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elif [ $1 == "406" ]; then echo "$1 Not acceptable" && exit 1;
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elif [ $1 == "422" ]; then echo "$1 Unprocessable entity" && exit 1;
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else echo "$1 Unknown Status Code" && exit 1; fi
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}
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#############################################
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#get IPv4 address:
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IPv4="$(curl -s4 https://ip.hetzner.com)"
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echo "#####################"
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echo "DDNS Manager by Aaron"
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echo "started $(date)"
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echo "DNS Record will be $SERVERNAME.$DNSZONE"
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echo -n "IPv4 is: "
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echo $IPv4
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echo ""
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#############################################
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API_STATUS_CODE=$(curl -o /dev/null -s -w "%{http_code}" "https://dns.hetzner.com/api/v1/zones" -H "Auth-API-Token: ${HETZNER_API_TOKEN}")
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if [ $API_STATUS_CODE != "200" ]; then
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echo "API ERROR"
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response_code $API_STATUS_CODE
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fi
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if [ -z $IPv4 ]; then
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echo "no IPv4 found"
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exit 1
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fi
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#############################################
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HETZNER_API_ZONE=$(curl -s "https://dns.hetzner.com/api/v1/zones" -H "Auth-API-Token: ${HETZNER_API_TOKEN}" | jq -r ".zones[] | select(.name==\"$DNSZONE\") | .id")
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#############################################
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echo "Check DNS Console for existing records"
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RECORDS=$(curl -s "https://dns.hetzner.com/api/v1/records?zone_id=${HETZNER_API_ZONE}" \
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-H "Auth-API-Token: ${HETZNER_API_TOKEN}")
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echo $RECORDS | jq -r '.records[] | select(.type=="A") | .name' | grep -q $SERVERNAME
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if [ $? -eq 1 ]; then
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echo "Record not found"
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echo -n "Set new Record: "
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response_code $(curl -o /dev/null -s -w "%{http_code}" -X "POST" "https://dns.hetzner.com/api/v1/records" \
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-H 'Content-Type: application/json' \
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-H "Auth-API-Token: ${HETZNER_API_TOKEN}" \
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-d $"{
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\"value\": \"${IPv4}\",
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\"ttl\": 60,
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\"type\": \"A\",
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\"name\": \"${SERVERNAME}\",
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\"zone_id\": \"${HETZNER_API_ZONE}\"
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}")
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echo ""
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else
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echo "Record already there"
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RECORD_ID=$(echo $RECORDS | jq -r '.records[] | select(.type=="A") | select(.name=="'${SERVERNAME}'") | .id' | head -1)
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echo -n "Current IP from Record: "
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OLD_IP=$(echo $RECORDS | jq -r '.records[] | select(.type=="A") | select(.name=="'${SERVERNAME}'") | .value' | head -1)
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echo $OLD_IP
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if [ $IPv4 != $OLD_IP ]; then
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echo "IP has changed"
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echo -n "Updating Record... "
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response_code $(curl -o /dev/null -s -w "%{http_code}" -X "PUT" "https://dns.hetzner.com/api/v1/records/$RECORD_ID" \
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-H 'Content-Type: application/json' \
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-H "Auth-API-Token: ${HETZNER_API_TOKEN}" \
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-d $"{
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\"value\": \"${IPv4}\",
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\"ttl\": 60,
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\"type\": \"A\",
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\"name\": \"${SERVERNAME}\",
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\"zone_id\": \"${HETZNER_API_ZONE}\"
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}")
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echo ""
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else
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echo "IP has not changed"
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fi
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fi
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exit 0
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93
ddns6.sh
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93
ddns6.sh
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#!/bin/bash
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##########################################################################################
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# SETTINGS
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HETZNER_API_TOKEN="" # https://dns.hetzner.com/settings/api-token
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SERVERNAME="" # desired subdomain e.g. "server1"
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DNSZONE="" # name of the zone in DNS Console e.g. "example.com"
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##########################################################################################
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command_exists() {
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command -v "$1" >/dev/null 2>&1
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if [[ $? -ne 0 ]]; then
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echo "Software dependency not met: $1"
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exit 1
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fi
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}
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for COMMAND in "curl" "jq" "grep"; do
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command_exists "${COMMAND}"
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done
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#############################################
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#HTTP Response Code Echo
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response_code() {
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if [ $1 == "200" ]; then echo "$1 Success";
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elif [ $1 == "401" ]; then echo "$1 Unauthorized" && exit 1;
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elif [ $1 == "403" ]; then echo "$1 Forbidden" && exit 1;
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elif [ $1 == "406" ]; then echo "$1 Not acceptable" && exit 1;
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elif [ $1 == "422" ]; then echo "$1 Unprocessable entity" && exit 1;
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else echo "$1 Unknown Status Code" && exit 1; fi
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}
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#############################################
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#get IPv6 address:
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IPv6=$(curl -s6 https://ip.hetzner.com)
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echo "#####################"
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echo "DDNS Manager by Aaron"
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echo "started $(date)"
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echo "DNS Record will be $SERVERNAME.$DNSZONE"
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echo -n "IPv6 is: "
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echo $IPv6
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echo ""
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#############################################
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API_STATUS_CODE=$(curl -o /dev/null -s -w "%{http_code}" "https://dns.hetzner.com/api/v1/zones" -H "Auth-API-Token: ${HETZNER_API_TOKEN}")
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if [ $API_STATUS_CODE != "200" ]; then
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echo "API ERROR"
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response_code $API_STATUS_CODE
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fi
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if [ -z $IPv6 ]; then
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echo "no IPv6 found"
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exit 1
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fi
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#############################################
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HETZNER_API_ZONE=$(curl -s "https://dns.hetzner.com/api/v1/zones" -H "Auth-API-Token: ${HETZNER_API_TOKEN}" | jq -r ".zones[] | select(.name==\"$DNSZONE\") | .id")
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#############################################
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echo "Check DNS Console for existing records"
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RECORDS=$(curl -s "https://dns.hetzner.com/api/v1/records?zone_id=${HETZNER_API_ZONE}" \
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-H "Auth-API-Token: ${HETZNER_API_TOKEN}")
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echo $RECORDS | jq -r '.records[] | select(.type=="AAAA") | .name' | grep -q $SERVERNAME
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if [ $? -eq 1 ]; then
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echo "Record not found"
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echo -n "Set new Record: "
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response_code $(curl -o /dev/null -s -w "%{http_code}" -X "POST" "https://dns.hetzner.com/api/v1/records" \
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-H 'Content-Type: application/json' \
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-H "Auth-API-Token: ${HETZNER_API_TOKEN}" \
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-d $"{
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\"value\": \"${IPv6}\",
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\"ttl\": 60,
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\"type\": \"AAAA\",
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\"name\": \"${SERVERNAME}\",
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\"zone_id\": \"${HETZNER_API_ZONE}\"
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}")
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echo ""
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else
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echo "Record already there"
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RECORD_ID=$(echo $RECORDS | jq -r '.records[] | select(.type=="AAAA") | select(.name=="'${SERVERNAME}'") | .id' | head -1)
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echo -n "Current IP from Record: "
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OLD_IP=$(echo $RECORDS | jq -r '.records[] | select(.type=="AAAA") | select(.name=="'${SERVERNAME}'") | .value' | head -1)
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echo $OLD_IP
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if [ $IPv6 != $OLD_IP ]; then
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echo "IP has changed"
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echo -n "Updating Record... "
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response_code $(curl -o /dev/null -s -w "%{http_code}" -X "PUT" "https://dns.hetzner.com/api/v1/records/$RECORD_ID" \
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-H 'Content-Type: application/json' \
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-H "Auth-API-Token: ${HETZNER_API_TOKEN}" \
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-d $"{
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\"value\": \"${IPv6}\",
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\"ttl\": 60,
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\"type\": \"AAAA\",
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\"name\": \"${SERVERNAME}\",
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\"zone_id\": \"${HETZNER_API_ZONE}\"
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}")
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echo ""
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else
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echo "IP has not changed"
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fi
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fi
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exit 0
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