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dnetmap

dnetmap is a lightweight, fast, and readable CLI tool to inspect Docker networks on your local machine.

It extracts key information such as:

  • Network name and ID
  • IP range (subnet)
  • Associated Linux bridge interface
  • Whether the network is linked to a Docker Compose project (and if so, which one)

Perfect for troubleshooting containers, auditing Compose environments, or visualizing your local network topology.

Installation

Prerequisites

  • Rust (edition 2021 or later)
  • Docker CLI installed and accessible (docker network inspect, etc.)

Install the crate using cargo

cargo install dnetmap

Build manually

git clone https://github.com/aguacero7/dnetmap.git
cd dnetmap
cargo build --release

The binary will be available at:

./target/release/dnetmap

You will usually MUST execute it as root to be able to communicate with docker

Usage

Basic usage

dnetmap all

Example output

Network name     : app_default
ID               : a1b2c3d4e5f6
IP range         : 172.20.0.0/16
Linux interface  : br-a1b2c3d4e5f6
Linked to Compose: yes, project `app`
------------------------------------------------------------

Error handling

  • If docker is not running or not installed, you'll see a clear error message