From 97fd399b4d1f2c28452ad1e04f00c70e1950dcb0 Mon Sep 17 00:00:00 2001
From: primal <primal@primal.host>
Date: Mon, 26 Jan 2026 15:40:55 -0500
Subject: [PATCH] Refactor DDNS updater: switch to Alpine, support multiple
 domains

- Replace golang base image with alpine for smaller footprint
- Add bash/curl dependencies explicitly
- Refactor script to support multiple domains via arrays
- Improve logging with timestamps and status messages
- Simplify docker-compose configuration
- Remove obsolete build scripts and env files

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 Dockerfile         | 13 +++++++++----
 arg                |  2 --
 build              |  2 --
 compose.yaml       | 12 ------------
 ddns.bash          | 42 +++++++++++++++++++++++++++++-------------
 docker-compose.yml | 11 +++++++++++
 env                |  2 --
 7 files changed, 49 insertions(+), 35 deletions(-)
 delete mode 100644 arg
 delete mode 100755 build
 delete mode 100644 compose.yaml
 create mode 100644 docker-compose.yml
 delete mode 100644 env

diff --git a/Dockerfile b/Dockerfile
index bdf5d5e..a58c4a4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,9 @@
-FROM		golang:latest
-WORKDIR		/root
-ADD		ddns.bash .
-CMD		[ "/root/ddns.bash" ]
+FROM alpine:latest
+
+RUN apk add --no-cache bash curl
+
+WORKDIR /app
+COPY ddns.bash .
+RUN chmod +x ddns.bash
+
+CMD ["./ddns.bash"]
diff --git a/arg b/arg
deleted file mode 100644
index b28271c..0000000
--- a/arg
+++ /dev/null
@@ -1,2 +0,0 @@
-PROJECT=apps
-SERVICE=ddns
diff --git a/build b/build
deleted file mode 100755
index e1e506a..0000000
--- a/build
+++ /dev/null
@@ -1,2 +0,0 @@
-docker pull golang:latest
-docker build -t primal/ddns .
diff --git a/compose.yaml b/compose.yaml
deleted file mode 100644
index 6d98185..0000000
--- a/compose.yaml
+++ /dev/null
@@ -1,12 +0,0 @@
-networks:
-  ddns:
-
-services:
-  ddns:
-    build: .
-    env_file:
-      - env
-    hostname: apps_ddns
-    image: ${IMAGE}:${VERSION}
-    networks:
-      - ddns
diff --git a/ddns.bash b/ddns.bash
index 8aa353b..ac061db 100755
--- a/ddns.bash
+++ b/ddns.bash
@@ -1,16 +1,32 @@
 #!/bin/bash
-DOMN=primal.host
-PASS=35f5fa4e1fc04d539260a4afaeb42371                   \
-IP0=''
+# Namecheap Dynamic DNS Updater
+# https://www.namecheap.com/support/knowledgebase/article.aspx/29/11/how-to-dynamically-update-the-hosts-ip-with-an-https-request/
+
+declare -a domains
+           domains=( "primal.host" )
+declare -a ipAddrs
+           ipAddrs=( "0.0.0.0" )
+declare -a passwords
+           passwords=( "4e6b91f434284c6d9261d5779b1d560f" )
+
 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} ${IP1} .
-	fi
-	sleep 3661
+  ipPublic=$(curl --no-progress-meter 'https://api.ipify.org?format=text')
+  echo "$(date '+%Y-%m-%d %H:%M:%S') Public IP: ${ipPublic}"
+  for i in ${!domains[@]} ; do
+    domain=${domains[$i]}
+    ipAddr=${ipAddrs[$i]}
+    password=${passwords[$i]}
+    if [[ "$ipPublic" != "$ipAddr" ]] ; then
+      for host in '@' '*' ; do
+        response="$(curl --no-progress-meter -G -d "host=$host" -d "domain=$domain" -d "password=$password" -d "ip=$ipPublic" https://dynamicdns.park-your-domain.com/update)"
+        if [[ $(echo $response | grep -c "<ErrCount>0</ErrCount>" -) -ne 1 ]] ; then
+          echo "  ERROR updating ${host}.${domain}: $response"
+        else
+          ipAddrs[${i}]="$ipPublic"
+          echo "  Updated ${host}.${domain} -> ${ipPublic}"
+        fi
+      done
+    fi
+  done
+  sleep 3600
 done
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..25a00c0
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,11 @@
+services:
+  ddns:
+    build: .
+    container_name: ddns
+    restart: unless-stopped
+    networks:
+      - proxy
+
+networks:
+  proxy:
+    external: true
diff --git a/env b/env
deleted file mode 100644
index 5ed6d11..0000000
--- a/env
+++ /dev/null
@@ -1,2 +0,0 @@
-VERSION=v1.0.0
-IMAGE=gitea.primal.host/wehrv/ddns