How to change the name of Docker

In Docker, the name of the container is an important identifier. By default, the name Docker assigns to a container is a randomly generated string, which is inconvenient for managing and maintaining a cluster of multiple containers. Therefore, it is a good practice to modify Docker names to better identify and classify containers so that they can be better tracked and managed. This article will discuss how to change the name of Docker.

1. Use the --name option to rename the container

Docker provides a convenient --name option to specify a custom name for the container. This option can be used when creating a container, for example:

docker run --name my-container image-name

This will create a container named my-container and use a specific image.

If the container already exists, you can use the docker rename command to rename the container:

docker rename old-container-name new-container-name

This will rename the container named old-container-name to new-container-name.

2. Using the docker-compose.yml file

If you are running multiple Docker containers, for example as a set of services, you can use the docker-compose.yml file to name them they. In this case, you can give each container a name in the docker-compose.yml file, for example:

services:
  web:
    image: nginx
    container_name: my_nginx
  db:
    image: mysql
    container_name: my_mysql

This will create two containers: one NGINX container named my_nginx, and another A MySQL container named my_mysql.

3. Use docker update command

You can also use docker update command to modify the name of the container, for example:

docker update --name my-new-container-name old-container-name

This will change the name to old The container of -container-name is renamed to my-new-container-name.

4. Using docker-compose command

If you use docker-compose to manage Docker services, you can use the following command to rename the service (container):

docker-compose rename old-service-name new-service-name

This will rename the service/container named old-service-name to new-service-name.

Summary

In Docker, the name of the container is an important identifier used to identify and manage the container. By default, the container name is a randomly generated string, but you can modify the container's name using various methods. You can use the --name option to name a container when you create it, use the docker rename command to rename an existing container, use the docker-compose.yml file to name a container, or use the docker-compose command to rename a service/container. With any of these methods, you can better manage your Docker containers, making your production environment more stable and reliable.

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