How can I get a Docker container’s IP address from the host?

To find a Docker container’s IP address from the host, you can use Docker commands or inspect the container’s details. Here are the primary ways to achieve this:

1. Using docker inspect

The docker inspect command retrieves detailed information about a container, including its IP address.

• Run docker inspect and search for the container’s IP address under the NetworkSettings section.
• This works for containers using the default bridge network or custom networks.

2. Using docker network inspect

If the container is part of a custom network, inspect the network instead:

• List all networks with docker network ls.
• Use docker network inspect network_name to see connected containers and their IP addresses.

3. Using docker exec

Access the container and run a command to check its IP address internally, such as ip addr or ifconfig.

4. Using Tools or Scripts

You can automate IP retrieval with scripts or tools like Docker Compose, which can provide service-related network information.

Note:

• If the container uses host networking, it shares the host’s network and doesn’t have a separate IP.
• Use proper permissions and ensure the container is running before inspecting it.