docker link container how to enter dos

Docker is a popular containerization technology today. Docker can easily manage containers and achieve the purpose of quickly packaging, publishing and running applications. In Docker, the link between containers is an important concept, allowing containers to communicate and access each other.

However, when linking multiple containers, sometimes we need to enter an already linked container to perform some operations and debugging, which requires us to learn how to enter the DOS interface of these containers.

This article will introduce how Docker links containers and how to enter the linked container DOS interface.

Docker Linked Containers

In Docker, multiple containers can be linked together for communication and access. Some of these containers can serve as service containers, providing services for other containers to call. For example, if a Web service needs to access a database service, you can first start a database container, then start a Web container, and link the Web container and the database container, so that the Web container can be accessed through the database container.

In Docker, the following command can be used to link the container:

$ docker run --name=db -d mongodb
$ docker run --name=web --link=db:db -d webapp

In the above command, first start a mongodb container named db, and then start a webapp container named web , and link the web container to the db container.

Docker Enter the DOS interface of the linked container

When we need to enter the linked container, we can use the following command:

$ docker exec -it CONTAINER_NAME bash

In the above command, CONTAINER_NAME represents the name of the container to enter.

Using the above command, we can enter the bash interface of the container and perform a series of operations and debugging.

When the operating system in the linked container is Windows, we need to use the following command to enter the DOS interface:

$ docker exec -it CONTAINER_NAME cmd

In the above command, CONTAINER_NAME represents the DOS interface to be entered. Container name.

Using the above command, we can enter the DOS interface of the container and perform a series of operations and debugging.

It should be noted that before entering the DOS interface of the container, you need to ensure that cmd.exe is installed in the container, otherwise you cannot enter the DOS interface.

Summary

This article introduces how Docker links containers and how to enter the linked container DOS interface. Linked containers are an important concept in Docker, which enable communication and access between containers. By entering the DOS interface of the linked container, we can perform some operations and debugging to improve the performance and reliability of Docker.

It should be noted that when using Docker, you must operate with caution to avoid unnecessary problems and losses.

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