linuxserver/ldap-auth repository overview

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.
• GitHub⁠ - view the source for all of our repositories.
• Open Collective⁠ - please consider helping us by either donating or contributing to our budget

⁠linuxserver/ldap-auth⁠

Ldap-auth⁠ software is for authenticating users who request protected resources from servers proxied by nginx. It includes a daemon (ldap-auth) that communicates with an authentication server, and a webserver daemon that generates an authentication cookie based on the user’s credentials. The daemons are written in Python for use with a Lightweight Directory Access Protocol (LDAP) authentication server (OpenLDAP or Microsoft Windows Active Directory 2003 and 2012).

⁠Supported Architectures

We utilise the docker manifest for multi-platform awareness. More information is available from docker here⁠ and our announcement here⁠.

Simply pulling lscr.io/linuxserver/ldap-auth:latest 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:

⁠Application Setup

• This container itself does not have any settings and it relies on the pertinent information passed through in http headers of incoming requests. Make sure that your webserver is set up with the right config.
• Here's a sample config: nginx-ldap-auth.conf⁠.
• Unlike the upstream project, this image encodes the cookie information with fernet, using a randomly generated key during container creation (or optionally user defined).
• Also unlike the upstream project, this image serves the login page at /ldaplogin (as well as /login) to prevent clashes with reverse proxied apps that may also use /login for their internal auth.

⁠Read-Only Operation

This image can be run with a read-only container filesystem. For details please read the docs⁠.

⁠Non-Root Operation

This image can be run with a non-root user. For details please read the docs⁠.

⁠Usage

To help you get started creating a container from this image you can either use docker-compose or the docker cli.

⁠docker-compose (recommended, click here for more info⁠)

---
services:
  ldap-auth:
    image: lscr.io/linuxserver/ldap-auth:latest
    container_name: ldap-auth
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Etc/UTC
      - FERNETKEY= #optional
      - CERTFILE= #optional
      - KEYFILE= #optional
    ports:
      - 8888:8888
      - 9000:9000
    restart: unless-stopped

⁠docker cli (click here for more info⁠)

docker run -d \
  --name=ldap-auth \
  -e PUID=1000 \
  -e PGID=1000 \
  -e TZ=Etc/UTC \
  -e FERNETKEY= `#optional` \
  -e CERTFILE= `#optional` \
  -e KEYFILE= `#optional` \
  -p 8888:8888 \
  -p 9000:9000 \
  --restart unless-stopped \
  lscr.io/linuxserver/ldap-auth:latest

⁠Parameters

Containers 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.

⁠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__MYVAR=/run/secrets/mysecretvariable

Will set the environment variable MYVAR based on the contents of the /run/secrets/mysecretvariable file.

⁠Umask for running applications

For all of our images we provide the ability to override the default umask settings for services started within the containers using the optional -e UMASK=022 setting. Keep in mind umask is not chmod it subtracts from permissions based on it's value it does not add. Please read up here⁠ before asking for support.

⁠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 your_user as below:

id your_user

Example output:

uid=1000(your_user) gid=1000(your_user) groups=1000(your_user)

⁠Docker Mods

We publish various Docker Mods⁠ to enable additional functionality within the containers. The list of Mods available for this image (if any) as well as universal mods that can be applied to any one of our images can be accessed via the dynamic badges above.

⁠Support Info

• Shell access whilst the container is running:

  docker exec -it ldap-auth /bin/bash
  

  Copy

• To monitor the logs of the container in realtime:

  docker logs -f ldap-auth
  

  Copy

• Container version number:

  docker inspect -f '{{ index .Config.Labels "build_version" }}' ldap-auth
  

  Copy

• Image version number:

  docker inspect -f '{{ index .Config.Labels "build_version" }}' lscr.io/linuxserver/ldap-auth:latest
  

  Copy

⁠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 (noted in the relevant readme.md), 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 Compose

• Update images:

  • All images:

    docker-compose pull
    

    Copy

  • Single image:

    docker-compose pull ldap-auth
    

    Copy

• Update containers:

  • All containers:

    docker-compose up -d
    

    Copy

  • Single container:

    docker-compose up -d ldap-auth
    

    Copy

• You can also remove the old dangling images:

  docker image prune
  

  Copy

⁠Via Docker Run

• Update the image:

  docker pull lscr.io/linuxserver/ldap-auth:latest
  

  Copy

• Stop the running container:

  docker stop ldap-auth
  

  Copy

• Delete the container:

  docker rm ldap-auth
  

  Copy

• Recreate a new container with the same docker run parameters as instructed above (if mapped correctly to a host folder, your /config folder and settings will be preserved)

• You can also remove the old dangling images:

  docker image prune
  

  Copy

⁠Image Update Notifications - Diun (Docker Image Update Notifier)

⁠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-ldap-auth.git
cd docker-ldap-auth
docker build \
  --no-cache \
  --pull \
  -t lscr.io/linuxserver/ldap-auth:latest .

The ARM variants can be built on x86_64 hardware and vice versa using lscr.io/linuxserver/qemu-static

docker run --rm --privileged lscr.io/linuxserver/qemu-static --reset

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

⁠Versions

• 25.12.24: - Add legacy-cgi. Fix fernet key storage.
• 22.12.24: - Rebase to Alpine 3.21. Add support for read-only and non-root.
• 30.06.24: - Rebase to Alpine 3.20.
• 23.12.23: - Rebase to Alpine 3.19.
• 20.06.23: - Sync upstream changes, including the ability to disable referrals with X-Ldap-DisableReferrals.
• 25.05.23: - Rebase to Alpine 3.18, deprecate armhf.
• 30.12.22: - Rebase to alpine 3.17.
• 19.09.22: - Rebase to alpine 3.15.
• 14.05.21: - Add linuxserver wheel index.
• 12.02.21: - Clean up cargo/rust cache.
• 10.02.21: - Rebasing to alpine 3.13.
• 08.09.20: - Set form action correctly.
• 30.07.20: - Fix bug related to unset optional CERTFILE and KEYFILE vars.
• 27.07.20: - Add support for HTTP over SSL (HTTPS).
• 21.07.20: - Add support for optional user defined fernet key.
• 02.06.20: - Rebasing to alpine 3.12, serve login page at /ldaplogin as well as /login, to prevent clashes with reverese proxied apps.
• 17.05.20: - Add support for self-signed CA certs.
• 20.02.20: - Switch to python3.
• 19.12.19: - Rebasing to alpine 3.11.
• 01.07.19: - Fall back to base64 encoding when basic http auth is used.
• 28.06.19: - Rebasing to alpine 3.10.
• 23.03.19: - Switching to new Base images, shift to arm32v7 tag.
• 22.02.19: - Rebasing to alpine 3.9.
• 18.09.18: - Update pip
• 14.09.18: - Add TZ parameter, remove unnecessary PUID/PGID params
• 11.08.18: - Initial release.