example-use-certificates.yml

---
- name: Use SSH certificates
  hosts: all
  tasks:
    - name: Configure sshd to enable SSH Certificate login
      ansible.builtin.include_role:
        name: ansible-sshd
      vars:
        sshd:
          # Disable password authentication, use SSH Certificates and configure authorized principals
          PasswordAuthentication: false
          TrustedUserCAKeys: /etc/ssh/trusted-user-ca-keys.pub
          AuthorizedPrincipalsFile: "/etc/ssh/auth_principals/%u"
        # List of trusted user CA keys
        sshd_trusted_user_ca_keys_list:
          - ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICwqRjI9gAwkQF9iIylhRVAOFy2Joodh3fXJ7CbGWqUd
        # Key is the user in the os, values are *Principals* defined in the certificate
        sshd_principals:
          admin:
            - frontend-admin
            - backend-admin
          somelinuxuser:
            - some-principal-defined-in-certificate