Require an installed ansible package and generated ssh key pair on the ansible control machine:
ssh-keygen -t rsa -b 4096 -C "admin@example.com" -f ~/.ssh/ansible-dcos
ssh-add ~/.ssh/ansible-dcos
Add the following lines to your group_vars/all and be sure all bootstraps, masters, agents and agent_publics nodes use the same initial user and password:
# For initial SSH access on nodes with Ansible
ansible_password: "YOUR_PASSWORD"
ansible_become_pass: "YOUR_PASSWORD"
#initial_remote_user: root
Finally, you can enable access via ssh to all nodes for use with ansible by applying the Ansible playbook:
ansible-playbook plays/access-onprem.yml