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Configure a Booster for Installation

If you have trouble downloading images from dockerhub.io, it is highly recommended that you configure a registry mirror (i.e. booster) beforehand to speed up downloads. You can refer to the official documentation of Docker or follow the steps below.

Get a Booster URL

To configure the booster, you need a registry mirror address. See how you can get a booster URL from Alibaba Cloud.

Set the Registry Mirror

You can configure the Docker daemon directly or use KubeKey to set the configuration.

Configure the Docker daemon

Note

Docker needs to be installed in advance for this method.

Run the following commands:

sudo mkdir -p /etc/docker

sudo vi /etc/docker/daemon.json

Add the registry-mirrors key and value to the file.
```
{
  "registry-mirrors": ["https://<my-docker-mirror-host>"]
}
```
Note

Make sure you replace the address within the quotation mark above with your own Booster URL.
Save the file and reload Docker by executing the following commands so that the change can take effect.
```
sudo systemctl daemon-reload
```
```
sudo systemctl restart docker
```

Use KubeKey to set the registry mirror

After you create a config-sample.yaml file with KubeKey before installation, navigate to registry in the file.
```
registry:
  registryMirrors: []
  insecureRegistries: []
  privateRegistry: ""
```
Note

For more information about each parameter under the registry section, see Kubernetes Cluster Configurations.
Provide the registry mirror address as the value of registryMirrors and save the file. For more information about installation, see Multi-node Installation.

Note

If you adopt All-in-One Installation, refer to the first method because a config-sample.yaml file is not needed for this mode.

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