What should I do if Synology Docker cannot find the registry?

With the rapid development of cloud computing technology, container technologies such as Docker have become representatives of the new generation of cloud computing technology. In container technology, Docker, as the most popular container engine, is widely used in various application scenarios. When using the Docker container engine, it is often necessary to use the registry to store and manage Docker images. However, when using Synology NAS as the host of the Docker container engine, the registry may not be found, which causes some trouble to users. In this article, we will discuss in detail the reasons why Synology Docker cannot find the registry and the corresponding solutions.

Chapter 1 Reasons for Problems

When using Synology NAS as the host of the Docker container engine, since Synology uses its own Docker Hub image by default, it will not be found. to other Docker images. Specifically, when using the docker pull command to download other Docker images, an error message that the registry cannot be found appears.

The reason for this error is mainly because Synology's default Docker image warehouse is "hub.docker.com", and this mirror warehouse is an overseas website, the access speed is relatively slow and requires circumvention. There are many domestic Docker image warehouses, such as Tencent Cloud Image Library, Alibaba Cloud Image Library, etc. If users need to use these domestic Docker image warehouses, they need to manually add the corresponding image warehouse address.

Chapter 2 Solution

The method to solve the problem that Synology Docker cannot find the registry is relatively simple. You only need to manually add the required Docker image warehouse address in Synology's Docker configuration. Can. The specific steps are as follows:

1. Log in to the management backend on Synology NAS, select "File Sharing and Storage" - "Storage Pool" - "Volume" to enter the detailed configuration of the Docker container mounting volume interface.
2. In the detailed configuration interface, select "Edit" to enter the Docker container configuration interface.
3. In the configuration interface of the Docker container, select "Advanced Settings", and then manually enter the required Docker image warehouse address in the "Registry". Take adding Tencent Cloud's Docker image warehouse as an example, fill in the address:

registry.cn-shenzhen.aliyuncs.com

4. After adding the required Docker image warehouse After entering the address, remember to click the "Apply" button to save it. Then restart the Docker service.

In this way, you can use the required Docker image warehouse to manage and use containers on Synology NAS. If you encounter other problems using Docker containers, you can consult and solve them in the Synology community.

Chapter 3 Summary

This article mainly introduces the reasons and solutions for Synology Docker not being able to find the registry. When using the Docker container engine, the registry is a very important component, and different Docker image warehouses need to be used for different application scenarios. Therefore, learning to manually add the required Docker image warehouse address can avoid the problem of not being able to find the registry and improve the efficiency and convenience of using Docker containers.

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