Configuring Password-free Login Between BMSs in a Cluster

Scenarios

This section describes how to configure a BMS cluster to enable password-free login between BMSs in the cluster.

Background

$: indicates performing an operation as a common user.

#: indicates performing an operation as an administrator.

Run the sudo su command to switch from a common user to an administrator.

Prerequisites

A BMS has been created and an EIP has been bound to the BMS.

Procedure

1. Use PuTTY and a key pair to log in to any BMS in the cluster.
2. Run the following command to disable user logout upon system timeout:

   # TMOUT=0

3. Copy the BMS key file in .pem format to the .ssh directory and name it id_rsa.

   $ cd ~/.ssh

   $ mv *.pem id_rsa

4. Run the following command to assign permissions of the key file:

   $ sudo chmod 600 id_rsa

5. Run the following command to log in to the BMS using SSH and check whether you can log in to the BMS without a password:

   $ ssh localhost

   Figure 1 Password-free login to a BMS
   

   If information shown in Figure 1 is displayed and you can log in to the BMS without a password, the permissions have been assigned.

6. Log in to other BMSs in the cluster and repeat steps 1 to 5.
7. Run the following commands to check whether the tested BMSs can be logged in from each other without a password:

   $ ssh Username@SERVER_IP