init commit

.gitignore

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+.idea

.travis.yml

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+language: bash
+os: linux
+arch:
+  - amd64
+  - arm64
+  - ppc64le
+  - s390x
+
+services: docker
+sudo: required
+
+script:
+  - docker build .
+
+after_script:
+  - docker images

Dockerfile

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+ARG ARCH=amd64/
+FROM ${ARCH}alpine:latest
+MAINTAINER webhainaut <jerome@webhainaut.be>
+
+ENV HOST=""
+ENV LOGIN=""
+ENV PASSWORD=""
+ENV ENTRYPOINT="https://www.ovh.com/nic/update"
+ENV NSSERVER="8.8.8.8"
+
+RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/community" >> /etc/apk/repositories \
+    && apk --no-cache update \
+    && apk --no-cache upgrade \
+    && apk add --no-cache \
+        curl \
+        wget \
+        curl \
+        bash \
+        zip \
+        dcron \
+        bind-tools \
+        ca-certificates \
+    && mkdir -p /srv/dyndns
+
+COPY config /srv/dyndns/cmd.sh
+COPY config /srv/dyndns/entrypoint.sh
+COPY config /srv/dyndns/dynhost
+COPY config /etc/cron.d/dynhost
+
+RUN chmod +x /srv/dyndns/dynhost \
+    && chmod +x /srv/dyndns/entrypoint.sh \
+    && chmod +x /srv/dyndns/cmd.sh
+
+HEALTHCHECK --interval=5s --timeout=3s CMD ps aux | grep '[c]rond' || exit 1
+
+ENTRYPOINT ["/srv/dyndns/entrypoint.sh"]
+CMD ["/srv/dyndns/cmd.sh"]

LICENSE

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+MIT License
+
+Copyright (c) 2020 webhainaut
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# DynDNS update script for OVH domains
+
+[![Build Status](https://travis-ci.org/webhainaut/docker.svg?branch=master)](https://travis-ci.org/webhainaut/docker)
+
+this is based on *ovh-dyndns* from [Ambroisemaupate work](https://github.com/ambroisemaupate/Docker).
+
+https://docs.ovh.com/fr/domains/utilisation-dynhost/
+
+Check every 5 minutes you WAN IP and if changed call OVH entry-point to update
+your DynDNS domain.
+
+```
+docker run -d --name="ovh-dyndns" \
+    -e "HOST=mydynamicdomain.domain.com" \
+    -e "LOGIN=mylogin" \
+    -e "PASSWORD=mypassword" \
+    ambroisemaupate/ovh-dyndns
+```
+
+## Docker-compose
+
+```
+version: "3"
+services:
+  crond:
+    image: ambroisemaupate/ovh-dyndns
+    environment:
+      HOST: mydynamicdomain.domain.com
+      LOGIN: mylogin
+      PASSWORD: mypassword
+    restart: always
+```
+
+## Customize external NS server
+
+By default, we use Google DNS to check your current DynDNS IP, but you can choose an
+other DNS overriding `NSSERVER` env var:
+
+```
+docker run -d --name="ovh-dyndns" \
+    -e "HOST=mydynamicdomain.domain.com" \
+    -e "LOGIN=mylogin" \
+    -e "PASSWORD=mypassword" \
+    -e "NSSERVER=192.168.1.1" \
+    ambroisemaupate/ovh-dyndns
+```

config/cmd.sh

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+#!/bin/sh
+set -e
+
+crond -s /etc/cron.d -f -L /proc/self/fd/1 "$@"

config/cronjob.txt

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+# Exec dynhost every 5 minutes
+*/5 * * * * /bin/sh /srv/dyndns/dynhost

config/dynhost.sh

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+#! /bin/sh
+# Mainly inspired by DynHost script given by OVH
+# New version by zwindler (zwindler.fr/wordpress)
+#
+# Initial version was doing  nasty grep/cut on local ppp0 interface
+#
+# This coulnd't work in a NATed environnement like on ISP boxes
+# on private networks.
+#
+# Also got rid of ipcheck.py thanks to mafiaman42
+#
+# This script uses curl to get the public IP, and then uses wget
+# to update DynHost entry in OVH DNS
+#
+# Logfile: dynhost.log
+#
+# CHANGE: "HOST", "LOGIN" and "PASSWORD" to reflect YOUR account variables
+SCRIPT_PATH='/srv/dyndns'
+
+getip() {
+    IP=`curl http://ifconfig.me/ip`
+    OLDIP=`dig +short $HOST @$NSSERVER`
+}
+
+echo "[`date '+%Y-%m-%d %H:%M:%S'`] ============================================================="
+echo "[`date '+%Y-%m-%d %H:%M:%S'`] Begining new dyndns check"
+getip
+
+if [ "$IP" ]; then
+    echo "[`date '+%Y-%m-%d %H:%M:%S'`] Old IP is ${OLDIP}"
+    echo "[`date '+%Y-%m-%d %H:%M:%S'`] New IP is ${IP}"
+
+    if [ "$OLDIP" != "$IP" ]; then
+        echo "[`date '+%Y-%m-%d %H:%M:%S'`] Update is needed…"
+        wget "${ENTRYPOINT}?system=dyndns&hostname=${HOST}&myip=${IP}" --user="${LOGIN}" --password="${PASSWORD}"
+        echo -n "$IP" > $SCRIPT_PATH/old.ip
+    else
+        echo "[`date '+%Y-%m-%d %H:%M:%S'`] No update required."
+    fi
+ else
+    echo "[`date '+%Y-%m-%d %H:%M:%S'`] WAN IP not found. Exiting!"
+ fi

config/entrypoint.sh

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+#!/bin/sh
+set -e
+
+# see: https://github.com/dubiousjim/dcron/issues/13
+# ignore using `exec` for `dcron` to get another pid instead of `1`
+# exec "$@"
+exec "$@"