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HomeOperation and MaintenanceDockerHow to access the IP of a docker container

Docker is a very popular containerization platform that helps developers build, deploy and run software applications. With Docker, users can package an application and its dependencies into a lightweight, portable container. However, when using Docker, you may encounter some problems, such as how to access the IP address in the container? This article will show you how to access Docker container IP.

First of all, you need to understand the network structure of the Docker container. In Docker, each container has a unique IP address through which the application running in the container can be accessed. Docker containers have two network modes: bridge mode and host mode. By default, Docker uses bridge mode for containers. In this mode, Docker will establish an independent bridge for each container and assign a unique IP address to the container.

To access the IP address of the Docker container, you need to use the name or ID of the Docker container. The name of the container can be viewed using the following command:

docker ps

The above command will list all running Docker containers and their basic information, including the name, ID, image used, etc. of the container.

There are two ways to access the Docker container IP:

  1. Use the Docker container name

To access the container IP through the Docker container name, you need to use the following command :

docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' container_name

Among them, container_name is the name of the Docker container.

Executing the above command will output the IP address of the Docker container.

  1. Use the Docker container ID

To access the container IP through the Docker container ID, you need to use the following command:

docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' container_id

Where, container_id is the ID of the Docker container .

Executing the above command will also output the IP address of the Docker container.

When using these two methods to access the Docker container IP, you need to pay attention to the following points:

  1. The container must be running, otherwise the container IP cannot be accessed.
  2. The name or ID of the container must be correct, otherwise the container IP cannot be accessed.
  3. If the container does not specify a name when starting, the container IP can be accessed through the Docker container ID.
  4. If the container has a name specified when it is started, the container IP can be accessed through the container name or container ID.

To sum up, the process of accessing the Docker container IP is relatively simple. You only need to use the name or ID of the Docker container. By accessing the container IP, Docker containers can be more conveniently managed, maintained, and monitored, which facilitates the development and deployment of Docker containers.

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