Initial commit

Author: aptalca

Dockerfile

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+FROM lsiobase/alpine
+MAINTAINER aptalca
+
+# environment settings
+ENV S6_BEHAVIOUR_IF_STAGE2_FAILS=2
+
+# install packages
+RUN \
+ apk add --no-cache \
+	curl
+
+# add local files
+COPY root/ /

README.md

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+![https://linuxserver.io](https://www.linuxserver.io/wp-content/uploads/2015/06/linuxserver_medium.png)
+
+## This is a Container in active development by the [LinuxServer.io](https://linuxserver.io) team and is not recommended for use by the general public.
+
+If you want to comment\contribute on this container , are looking for support on any of our other work , or are curious about us in general, check out the following.
+
+* [forum.linuxserver.io](https://forum.linuxserver.io)
+* [IRC](https://www.linuxserver.io/index.php/irc/) on freenode at `#linuxserver.io`
+* [Podcast](https://www.linuxserver.io/index.php/category/podcast/) covers everything to do with getting the most from your Linux Server plus a focus on all things Docker and containerisation!

READMETEMPLATE.md

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+![https://linuxserver.io](https://www.linuxserver.io/wp-content/uploads/2015/06/linuxserver_medium.png)
+
+The [LinuxServer.io](https://linuxserver.io) team brings you another container release featuring auto-update on startup, easy user mapping and community support. Find us for support at:
+* [forum.linuxserver.io](https://forum.linuxserver.io)
+* [IRC](https://www.linuxserver.io/index.php/irc/) on freenode at `#linuxserver.io`
+* [Podcast](https://www.linuxserver.io/index.php/category/podcast/) covers everything to do with getting the most from your Linux Server plus a focus on all things Docker and containerisation!
+
+# linuxserver/duckdns
+
+Duck DNS is a free service which will point a DNS (sub domains of duckdns.org) to an IP of your choice. The service is completely free, and doesn't require reactivation or forum posts to maintain its existence.
+
+## Usage
+
+```
+docker create \
+  --name=DuckDNS \
+  -e PGID=<gid> -e PUID=<uid>  \
+  -e SUBDOMAINS=<subdomains> \
+  -e TOKEN=<token> \
+  linuxserver/duckdns
+```
+
+**Parameters**
+
+* `-e PGID` for GroupID - see below for explanation
+* `-e PUID` for UserID - see below for explanation
+* `-e SUBDOMAINS` for subdomains - multiple subdomains allowed, comma separated, no spaces
+* `-e TOKEN` for DuckDNS token
+
+
+### User / Group Identifiers
+
+Sometimes when using data volumes (`-v` flags) permissions issues can arise between the host OS and the container. We avoid this issue by allowing you to specify the user `PUID` and group `PGID`. Ensure the data volume directory on the host is owned by the same user you specify and it will "just work" ™.
+
+In this instance `PUID=1001` and `PGID=1001`. To find yours use `id user` as below:
+
+```
+  $ id <dockeruser>
+    uid=1001(dockeruser) gid=1001(dockergroup) groups=1001(dockergroup)
+```
+
+## Setting up the application
+
+First, go to www.duckdns.org, register your subdomain and retrieve your token  
+Then run the docker create command above with your subdomain(s) and token  
+It will update your IP with the DuckDNS service every 5 minutes  
+
+
+## Updates
+
+* Shell access whilst the container is running: `docker exec -it DuckDNS /bin/bash`
+* Upgrade to the latest version: `docker restart DuckDNS`
+* To monitor the logs of the container in realtime: `docker logs -f DuckDNS`
+
+## Versions
+
++ **25.03.2016:** Initial release

root/app/duck.sh

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+#!/usr/bin/with-contenv bash
+
+. /app/duck.conf
+RESPONSE=`curl -s "https://www.duckdns.org/update?domains=$SUBDOMAINS&token=$TOKEN&ip="`
+if [ "$RESPONSE" = "OK" ]; then
+echo "Your IP was updated at "$(date)
+else
+echo "Something went wrong, please check your settings  "$(date)
+fi

root/defaults/duckcron

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+*/5 * * * * /app/duck.sh 2>&1

root/etc/cont-init.d/40_config.sh

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+#!/usr/bin/with-contenv bash
+
+  #Check to make sure the subdomain and token are set
+if [ -z "$SUBDOMAINS" ] || [ -z "$TOKEN" ]; then
+  echo "Please pass both your subdomain(s) and token as environment variables in your docker run command. See docker info for more details."
+  exit 1
+else
+  echo "Retrieving subdomain and token from the environment variables"
+  echo -e "SUBDOMAINS=$SUBDOMAINS TOKEN=$TOKEN" > /app/duck.conf
+fi
+
+# set crontab
+crontab -u abc /defaults/duckcron
+
+# permissions
+chown -R abc:abc \
+	/app
+chmod +x /app/duck.sh
+
+# run initial IP update
+exec \
+	s6-setuidgid abc /app/duck.sh

root/etc/services.d/cron/run

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+#!/usr/bin/with-contenv bash
+
+/usr/sbin/crond -f -S -l 0 -c /etc/crontabs