# node configuration

## Authenticating Nodes Using SSH Keys

If you choose to use SSH keys to connect to all the nodes of the cluster to be created, you need to configure the public and private keys as described below.

1. run the following command to generate public and private keys on any node of the managed cluster.

    ```shell
    cd /root/.ssh
    ssh-keygen -t rsa
    ```

2. Run the __ls__ command to check whether the key on the management cluster is successfully created, and the correct feedback is as follows:

    ```shell
    ls
    id_rsa id_rsa.pub known_hosts
    ```

    Where the file named __id_rsa__ is the private key and the file named __id_rsa.pub__ is the public key.

3. Send the public key file __id_rsa.pub__ to all nodes of the cluster to be created through SCP.

    ```shell
    scp /root/.ssh/id_rsa.pub root@10.0.0.0:/root/.ssh/id_rsa.pub
    ```

    Replace the root@10.0.0.0 user account and IP in the above command with the username and IP of the node to create the cluster. Each planned node of the cluster to be created needs to perform the same operation.

4. Base 64 encode the private key file __id_rsa__ .

    ```shell
    base64 id_rsa
    ```

5. Download the encoded private key file __id_rsa__ to your current node, and upload the private key file on the interface.