The LinuxServer.io team brings you another container release featuring :-

regular and timely application updates
easy user mappings (PGID, PUID)
custom base image with s6 overlay
weekly base OS updates with common layers across the entire LinuxServer.io ecosystem to minimise space usage, down time and bandwidth
regular security updates

Find us at:

Blog - all the things you can do with our containers including How-To guides, opinions and much more!
Discord - realtime support / chat with the community and the team.
Discourse - post on our community forum.
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linuxserver/ddclient

Ddclient is a Perl client used to update dynamic DNS entries for accounts on Dynamic DNS Network Service Provider. It was originally written by Paul Burry and is now mostly by wimpunk. It has the capability to update more than just dyndns and it can fetch your WAN-ipaddress in a few different ways.

Supported Architectures

Our images support multiple architectures such as x86-64, arm64 and armhf. We utilise the docker manifest for multi-platform awareness. More information is available from docker here and our announcement here.

Simply pulling linuxserver/ddclient should retrieve the correct image for your arch, but you can also pull specific arch images via tags.

The architectures supported by this image are:

Architecture	Tag
x86-64	amd64-latest
arm64	arm64v8-latest
armhf	arm32v7-latest

Usage

Here are some example snippets to help you get started creating a container.

docker

docker create \
  --name=ddclient \
  -e PUID=1000 \
  -e PGID=1000 \
  -e TZ=Europe/London \
  -v <path to data>:/config \
  --restart unless-stopped \
  linuxserver/ddclient

docker-compose

Compatible with docker-compose v2 schemas.

---
version: "2"
services:
  ddclient:
    image: linuxserver/ddclient
    container_name: ddclient
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Europe/London
    volumes:
      - <path to data>:/config
    restart: unless-stopped

Parameters

Container images are configured using parameters passed at runtime (such as those above). These parameters are separated by a colon and indicate <external>:<internal> respectively. For example, -p 8080:80 would expose port 80 from inside the container to be accessible from the host's IP on port 8080 outside the container.

Parameter	Function
`-e PUID=1000`	for UserID - see below for explanation
`-e PGID=1000`	for GroupID - see below for explanation
`-e TZ=Europe/London`	Specify a timezone to use EG Europe/London.
`-v /config`	Where ddclient should store its config files.

Environment variables from files (Docker secrets)

You can set any environment variable from a file by using a special prepend FILE__.

As an example:

-e FILE__PASSWORD=/run/secrets/mysecretpassword

Will set the environment variable PASSWORD based on the contents of the /run/secrets/mysecretpassword file.

User / Group Identifiers

When using 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 any volume directories on the host are owned by the same user you specify and any permissions issues will vanish like magic.

In this instance PUID=1000 and PGID=1000, to find yours use id user as below:

  $ id username
    uid=1000(dockeruser) gid=1000(dockergroup) groups=1000(dockergroup)

Application Setup

Edit the ddclient.conf file found in your /config volume. This config file has many providers to choose from and you basically just have to uncomment your provider and add username/password where requested. If you modify ddclient.conf, ddclient will automaticcaly restart and read the config.

Support Info

Shell access whilst the container is running: docker exec -it ddclient /bin/bash
To monitor the logs of the container in realtime: docker logs -f ddclient
container version number
- docker inspect -f '{{ index .Config.Labels "build_version" }}' ddclient
image version number
- docker inspect -f '{{ index .Config.Labels "build_version" }}' linuxserver/ddclient

Updating Info

Most of our images are static, versioned, and require an image update and container recreation to update the app inside. With some exceptions (ie. nextcloud, plex), we do not recommend or support updating apps inside the container. Please consult the Application Setup section above to see if it is recommended for the image.

Below are the instructions for updating containers:

Via Docker Run/Create

Update the image: docker pull linuxserver/ddclient
Stop the running container: docker stop ddclient
Delete the container: docker rm ddclient
Recreate a new container with the same docker create parameters as instructed above (if mapped correctly to a host folder, your /config folder and settings will be preserved)
Start the new container: docker start ddclient
You can also remove the old dangling images: docker image prune

Via Docker Compose

Update all images: docker-compose pull
- or update a single image: docker-compose pull ddclient
Let compose update all containers as necessary: docker-compose up -d
- or update a single container: docker-compose up -d ddclient
You can also remove the old dangling images: docker image prune

Via Watchtower auto-updater (especially useful if you don't remember the original parameters)

Pull the latest image at its tag and replace it with the same env variables in one run:

docker run --rm \
-v /var/run/docker.sock:/var/run/docker.sock \
containrrr/watchtower \
--run-once ddclient

Note: We do not endorse the use of Watchtower as a solution to automated updates of existing Docker containers. In fact we generally discourage automated updates. However, this is a useful tool for one-time manual updates of containers where you have forgotten the original parameters. In the long term, we highly recommend using Docker Compose.

You can also remove the old dangling images: docker image prune

Building locally

If you want to make local modifications to these images for development purposes or just to customize the logic:

git clone https://github.com/linuxserver/docker-ddclient.git
cd docker-ddclient
docker build \
  --no-cache \
  --pull \
  -t linuxserver/ddclient:latest .

The ARM variants can be built on x86_64 hardware using multiarch/qemu-user-static

docker run --rm --privileged multiarch/qemu-user-static:register --reset

Once registered you can define the dockerfile to use with -f Dockerfile.aarch64.

Versions

19.12.19: - Rebasing to alpine 3.11.
28.06.19: - Rebasing to alpine 3.10.
23.03.19: - Switching to new Base images, shift to arm32v7 tag.
10.03.19: - Add perl-io-socket-inet6 for ipv6 support.
22.02.19: - Rebasing to alpine 3.9.
11.02.19: - Add pipeline logic and multi arch.
22.08.18: - Rebase to alpine 3.8.
10.08.18: - Update to ddclient v3.9.0. For Cloudflare users, please ensure you remove the line server=www.cloudflare.com from your ddclient.conf.
07.12.17: - Rebase to alpine 3.7.
28.05.17: - Rebase to alpine 3.6.
10.02.17: - Rebase to alpine 3.5.
26.11.16: - Update README to new standard and add icon and other small details.
29.08.16: - Initial release.

aroberts / docker-ddclient