In our previous step we set up FAH on our Stack of NUCs.

Now we are going to disable the service and uninstall it. In the last step there was an optional step to “finish folding”. Bonus points for doing this.

Purpose:

• Demonstrate stopping and removing an installed service workload

From NUC 1, log in to the Ansible control node, NUC 2.

Create the file /home/ansible/my-project/fah/removefah.yml

removefah.yml

---
- hosts: all
  become: true
  become_user: root
  tasks:
    - name: Stop and disable FAHClient.service
      ansible.builtin.service:
        name: FAHClient.service
        state: stopped
        enabled: false
    - name: Wait for termination of all FaH client processes
      wait_for:
        path: /var/run/fahclient.pid
        state: absent
    - name: Remove fahclient package
      apt:
        name: fahclient
        state: absent
        autoclean: true
        purge: true
    - name: Reboot
      reboot:

ansible-playbook removefah.yml

Now that we have removed the CPU-hungry FAH service, we go next to installing Kubernetes.

Cyber security students may want to deploy Hashtopolis in the Lab. This deploys a distributed hashcat cluster for brute forcing password hashes.