How to start the server with docker command line

The Docker command line is a very common deployment method. When deploying and managing Docker containers, it is very important to master the basic Docker commands. Starting the Docker server is also one of the keys to Docker operation. In this article, we'll cover how to start a server using the Docker command line.

There are two main ways to start the Docker server, one is to start through the Docker command line, and the other is to start through the Docker Compose file. We will introduce these two methods separately.

Start the server through the Docker command line

When using the Docker command line to start the server, you need to use the run command. The following is the basic format for starting the server through the Docker command line:

docker run [OPTIONS] IMAGE [COMMAND] [ARG...]

Among them, OPTIONS represents some optional parameters, IMAGE represents the name of the Docker image that needs to be started, COMMAND represents the command that needs to be executed in the container, and ARG represents the parameters required for the command.

The following are some examples of commonly used Docker command lines to start the server:

1. Start the Ubuntu 18.04 image:

docker run -it ubuntu:18.04 /bin/bash

Enter the above command in the command line After that, a Docker container based on the Ubuntu 18.04 image will be started and the command line environment of the container will be automatically entered.

2. Start the Nginx image:

docker run -d --name my-nginx -p 8080:80 nginx

After entering the above command in the command line, a Docker container based on the Nginx image will be started and named my-nginx, and map the container's port 80 to the host's port 8080. At this point, the Nginx service of the container can be accessed through http://localhost:8080.

3. Start the MySQL image:

docker run -d --name my-mysql -e MYSQL_ROOT_PASSWORD=my-secret-pw mysql:latest

After entering the above command in the command line, a Docker container based on the MySQL image will be started and named my-mysql, and set the MySQL root password to my-secret-pw.

Through the above command examples, we can see the basic operations of starting the server from the Docker command line, and also understand some common startup parameters. Below, we will introduce another way to start a Docker server - using a Docker Compose file.

Start the server through the Docker Compose file

Docker Compose is a tool provided by Docker for defining and running multiple container applications. When using Docker Compose to start the server, you need to first define a docker-compose.yml file to configure various parameters required for service startup. Here is a simple docker-compose.yml file example:

version: '3'
services:
  web:
    build: .
    ports:
      - "5000:5000"
    volumes:
      - .:/code
    command: python app.py

In the above example, we defined a service named web, in which A Dockerfile file is used to build the image, map the 5000 port of the container to the 5000 port of the host, mount the /code volume in the container to the current directory of the host, and after the container is started Execute the python app.py command.

After the docker-compose.yml file is defined, enter the directory where the file is located on the command line and enter the following command to start the service:

docker-compose up -d

In the above After the command is executed, a Docker Compose service will be started and run in the background. You can use the following command to view the started services:

docker-compose ps

With the above command, we can start the Docker server very conveniently and quickly, and we can define and manage multiple container applications through Docker Compose files.

Summary

This article introduces how to use the Docker command line and Docker Compose file to start the server, and provides specific command examples. By mastering these two startup methods, you can easily deploy and manage Docker containers. In actual use, you can also use other Docker commands to configure and operate the container to work more efficiently.

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