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HomeOperation and MaintenanceDockerWhat to do if docker pull domestic image error

Docker is an open source containerization platform that is very popular. When using Docker, we often need to pull images from Docker Hub, but due to domestic network reasons, we sometimes encounter errors. One of the more common problems is that the docker pull command reports an error when using domestic images. This article will introduce how to solve the problem of domestic image docker pull error.

  1. Installing Docker

First, we need to install Docker locally. Docker's official website provides installation packages for various operating systems, which can be downloaded and installed from the official website.

  1. Configuring Docker image source

Docker Hub is Docker’s official image repository, but due to network reasons, it is difficult for us to quickly pull what we need from Docker Hub Mirror. Therefore, many domestic companies and organizations have established their own Docker image sources.

Taking the Alibaba Cloud image source as an example, we can select our own region and version in Alibaba Cloud's Container Service Center, and follow the prompts to install and configure the Docker image source. At this time, enter the following command in the command line to set the default image source of the docker pull command to the Alibaba Cloud image source:

$ sudo docker pull registry.cn-hangzhou.aliyuncs.com/library/ubuntu:latest

If you want to use other domestic image sources , and can also be configured according to the documents provided by each company.

  1. Problems encountered

When using Docker in China, we often encounter the following problems:

Problem 1: Unable to connect to Docker Hub

Because the Docker Hub server is located abroad and is frequently accessed by users around the world, this causes Docker to be very slow or inaccessible when accessing Docker Hub domestically. At this time, you can choose to use domestic Docker image sources, such as Alibaba Cloud, DaoCloud, NetEase Cloud, etc.

Problem 2: Unable to pull the Docker image

When using the Docker image, we sometimes encounter the situation that the required image cannot be pulled. This may be due to Docker Hub network problems , or it may be that the image name we entered is wrong.

Solution:

  1. Check whether the image name and version are correct;
  2. Confirm whether the network is normal, you can check by pinging baidu.com;
  3. Try to use other domestic Docker image sources.

Problem 3: Unable to push your own image

If we make the image ourselves and want to push it to Docker Hub, we may encounter an error. This may be because we did not create the corresponding repository on Docker Hub, or it may be that we did not log in to Docker Hub correctly.

Solution:

  1. Create a repository on Docker Hub and make sure the name is consistent with the local image name;
  2. Use the correct command for login verification, such as docker loginCommand;
  3. Confirm that you have the permission to push the image.
  4. Summary

The main problem encountered when using Docker in China is the inability to access Docker Hub and the inability to pull the required Docker image. By using domestic Docker image sources and correct image names, and confirming network and permissions, we can effectively solve these problems. Of course, network problems are a common phenomenon, and we also need to do maintenance work on our own network infrastructure to ensure the good operation of our Docker environment.

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