Configuring Password-Free Login

To ensure the communication between services on different nodes, configure password-free login on all compute nodes.

1. Generate a public key on each OpenStack node.

   ssh-keygen -t rsa

   

   The options are default settings during the configuration. You can press Enter to confirm the settings one by one.

   Figure 1 Generating a key
   
2. Distribute the key to each node.

   ssh-copy-id controller
   ssh-copy-id compute
   

   

   Enter yes and the node password as prompted.

   Figure 2 Distributing the key