Using SSH-Key Authentication
To use key authentication, you must provide the SSH key file used in all the cluster servers to the hosts file, which is usually located from the light-app directory in this path: ansible/inventories/cluster_example/hosts.
To use SSH-key authentication instead of a plain text password, see the knowledge base article How To Configure SSH Key-Based Authentication on a Linux Server.
After you have configured the SSH key for authentication, you can connect from the installation server to the target with the ansible_ssh_private_key_file instead ofansible_ssh_pass, in the following format:
ansible_ssh_private_key_file=<private RSA key file path>With the default configuration, the top section of the hosts file lines are configured as below:
server00 ansible_host=rack11-server92 ansible_connection=ssh ansible_ssh_user=root ansible_ssh_pass=light ansible_become_user=root ansible_become_pass=lightAs an example, assume that the SSH key for the servers is located at /root/mykey.txt. If so, change the configuration line to this:
server00 ansible_host=rack11-server92 ansible_connection=ssh ansible_ssh_user=root ansible_ssh_private_key_file=/root/mykey.txt ansible_become_user=root ansible_become_pass=light