Doku

Doku is a simple, lightweight web-based application that allows you to monitor Docker disk usage in a user-friendly manner. The Doku displays the amount of disk space used by the Docker daemon, splits by images, containers, volumes, and builder cache. If you're lucky, you'll also see the sizes of log files :)

Doku should work for most. It has been tested with dozen of hosts.

         

Getting Doku

Doku is a very small Docker container (6 MB compressed). Pull the latest release from the index:

docker pull amerkurev/doku:latest

Using Doku

The simplest way to use Doku is to run the Docker container. Mount the Docker Unix socket with -v to /var/run/docker.sock. Also, you need to mount the top-level directory (/) on the host machine in ro mode. Otherwise, Doku will not be able to calculate the size of the logs and bind mounts.

docker run --name doku -d -v /var/run/docker.sock:/var/run/docker.sock:ro -v /:/hostroot:ro -p 9090:9090 amerkurev/doku

Use following configuration for docker compose:

version: "3"
services:
  docu:
    image: amerkurev/doku:v0.0.16
    ports:
      - 9090:9090
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - /:/hostroot:ro

Doku will be available at http://localhost:9090/. You can change -p 9090:9090 to any port. For example, if you want to view Doku over port 8080 then you would do -p 8080:9090.

Basic auth

Doku supports basic auth for all requests. This functionality is disabled by default.

In order to enable basic auth, user should set the typical htpasswd file with --basic-htpasswd=<file location> or env BASIC_HTPASSWD=<file location>.

Doku expects htpasswd file to be crypted with bcrypt algorithm in the following format:

username1:bcrypt(password1)
username2:bcrypt(password2)
...

this can be generated with htpasswd -nbB command, i.e. htpasswd -nbB test passwd

Supported architectures

• linux/amd64
• linux/arm/v7
• linux/arm64

Special thanks to

The following great works inspired me:

• Gatus: https://github.com/TwiN/gatus
• Dozzle: https://github.com/amir20/dozzle
• Reproxy: https://github.com/umputun/reproxy

License

MIT