In this lesson, you will learn how to use Ansible to automatically detect and correct configuration drift across your fleet to ensure your authentication systems stay compliant with security standards.
Why Compliance Drift Happens
In complex environments, manual configuration changes, emergency hotfixes, or human error often lead to "configuration drift." Over time, the PAM stacks or /etc/pam.d/ files on individual nodes begin to diverge from your organization's security baseline. When these files drift, you lose the guarantee that your identity-backed security policies—like hardware-backed secret storage or SSSD latency requirements—are actually being enforced.
Automating Remediation with Ansible
Rather than manually auditing servers, we use Ansible’s declarative nature to enforce the "desired state." By treating PAM configurations as code, we can define the exact expected contents of a file and instruct Ansible to overwrite any deviations.
For example, if your security policy requires that all systems use pam_faillock.so to prevent brute force, you can use the template module to push a standardized configuration file:
- name: Enforce secure PAM configuration
template:
src: templates/common-auth.j2
dest: /etc/pam.d/common-auth
owner: root
group: root
mode: '0644'
notify: restart_sssd
By adding a notify handler to restart relevant services (like SSSD or sshd), you ensure that the remediation is not only applied but immediately active across your entire fleet.
Integrating Compliance Checks
To take this further, you can combine this with an audit step. Use the ansible.builtin.command module to run your security audit scripts (as covered in previous lessons) and use the result to trigger a remediation role. If the audit returns a non-zero exit code indicating a compliance violation, Ansible runs the task above to reset the system to its hardened, known-good state. This closes the loop between detecting anomalous configuration behavior and maintaining a high-security identity architecture.
Key Takeaway: Automating remediation allows you to move from "point-in-time" audits to continuous compliance, where configuration drift is detected and corrected by Ansible without manual intervention.