How to set up docker pulling mirror

Docker can customize settings when pulling images, including: specifying the image version, mirror repository, speed limit pull, authentication, and pulling tagless images. These settings can be implemented through the docker pull command and its options, including --registry, --limit-rate, --auth, and -a.

How to set up Docker pull image

Introduction
Docker pull mirror is used to get the required image from the Docker image repository. You can use the docker pull command to pull the image, but sometimes other settings are required to control the pull behavior.

Settings
The following are some settings available when Docker pulls images:

1. Specify the mirror version

 <code>docker pull <image-name>:<tag></tag></image-name></code>

Where <tag></tag> specifies the version or tag of the mirror. For example, to pull the latest version of the Ubuntu image, use:

 <code>docker pull ubuntu:latest</code>

2. Specify the image repository
By default, Docker pulls the image from the Docker Hub (official image repository). To pull images from other mirror repositories, use the --registry option:

 <code>docker pull --registry <registry-url> <image-name></image-name></registry-url></code>

For example, to pull an image from a Google container image repository, use:

 <code>docker pull --registry https://gcr.io google/debian:latest</code>

3. Speed ​​limit pull
Use the --limit-rate option to limit pulling speed:

 <code>docker pull --limit-rate <bytes-per-second> <image-name></image-name></bytes-per-second></code>

For example, limit the pull speed to 1 MB per second:

 <code>docker pull --limit-rate 1mb <image-name></image-name></code>

4. Authentication
Some private mirror repositories require authentication to access. You can use the --auth option to provide credentials:

 <code>docker pull --auth <username>:<password> <image-name></image-name></password></username></code>

For example, to pull a private image, use:

 <code>docker pull --auth myusername:mypassword myregistry.io/myimage</code>

5. Label-free mirror
If the mirror has no label, you can use the -a option to pull it:

 <code>docker pull -a <image-name></image-name></code>

For example, to pull a tagless image named "myimage", use:

 <code>docker pull -a myimage</code>

Other precautions

• Make sure you have the permissions you need to pull the image.
• Docker automatically stores the pulled images in the local image repository on the host.
• You can use the docker images command to view locally stored images.

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