How to connect to a remote server using Docker

How does Docker connect to the server?

Docker is the most popular containerization technology today and has high flexibility and portability. Many developers and IT operations personnel are using Docker to simplify and optimize the deployment and operation of applications. However, for some Docker novices, how to connect to a remote server locally is a problem. This article will introduce how to use Docker to connect to a remote server.

1. Install Docker

Before connecting to the remote server, you first need to install Docker locally. After downloading and installing Docker from the official website [https://www.docker.com/products/docker-desktop], check the Docker version number through the terminal to confirm whether Docker has been installed correctly.

2. Create a remote server

Next, create a remote server. Here we take the Alibaba Cloud ECS service as an example. First, log in to the Alibaba Cloud official website, enter the ECS management console, select "Instance" - "Create Instance", fill in the information according to the prompts, select the appropriate operating system and other information, and finally purchase to successfully create the instance.

3. Configure SSH for the remote server

After creating the instance, you need to configure the SSH connection for subsequent Docker connections. After entering the ECS instance list, find your instance, click "Remote Connection", and then proceed to the next step to view some information about the SSH connection.

Then you need to use the ssh command in the local terminal to connect to the server. Here we also take the Alibaba Cloud ECS service as an example:

ssh root@47.**.**.**

Note that the 47...* here * is the IP address of your remote server. Of course, you also need to add local host trust to the server by entering a password or SSH private key. This is an important security configuration for SSH connections.

4. Start the Docker service on the remote server

We have installed Docker locally, and next we will start the Docker service on the remote server. Execute the following commands in the terminal:

curl -fsSL https://get.docker.com -o get-docker.sh sudo sh get-docker.sh systemctl enable docker systemctl start docker

These commands will download and install Docker on the server, and also enable and start the Docker service.

5. Connect to the remote Docker server locally

Now that you have successfully connected to the remote server and started the Docker service on the server, you only need to connect the Docker client to the local machine. Remote Docker server. Execute the following command in the terminal:

docker -H ssh://root@47.**.**.**:2375 ps

Among them, "ssh://root@47...**:2375" is the address and port number of the remote Docker server, 2375 is The default port number of the Docker service. Of course, the IP address here also needs to be replaced with your corresponding address.

At this point, we have successfully connected to the remote Docker server locally and can operate the Docker container on the remote server on the local client.

Summary

This article introduces how to use Docker to connect to a remote server. Through the above five steps, we can successfully connect the Docker client to the remote Docker server. In this way, we can deploy containerized applications to remote servers and perform flexible management and maintenance. If you are using Docker or considering using Docker, I hope this article can help you.

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