.

Dockerfile

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+FROM		golang:latest
+WORKDIR		/root
+ADD		ddns.bash .
+CMD		[ "/root/ddns.bash" ]

arg

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+PROJECT=apps
+SERVICE=ddns

build

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+docker pull golang:latest
+docker build -t primal/ddns .

compose.yaml

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+networks:
+  ddns:
+
+services:
+  ddns:
+    build: .
+    env_file:
+      - env
+    hostname: apps_ddns
+    image: ${IMAGE}:${VERSION}
+    networks:
+      - ddns

ddns.bash

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+#!/bin/bash
+DOMN=primal.host
+PASS=35f5fa4e1fc04d539260a4afaeb42371                   \
+IP0=''
+while true ; do
+	IP1=$(curl --no-progress-meter 'https://api.ipify.org?format=text')
+	if [[ "${IP1}" != "${IP0}" && "${IP1}" != '' ]] ; then
+		OP0=$(curl --no-progress-meter -X GET -d 'host=@' -d "domain=${DOMN}" -d "password=${PASS}" -d "ip=${IP1}" -G 'https://dynamicdns.park-your-domain.com/update')
+		OP1=$(curl --no-progress-meter -X GET -d 'host=*' -d "domain=${DOMN}" -d "password=${PASS}" -d "ip=${IP1}" -G 'https://dynamicdns.park-your-domain.com/update')
+		echo $(date) ${IP0} ${IP1}
+		IP0=${IP1}
+	else
+		echo $(date) ${IP0} ${IP1} .
+	fi
+	sleep 3661
+done

env

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+VERSION=v1.0.0
+IMAGE=gitea.primal.host/wehrv/ddns