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

In our previous step we updated Ubuntu

Now we are going to create and run an Ansible playbook to check the CMOS battery health on the nodes. Using /proc/driver/rtc instead of lm-sensors and sensors because it doesn't show the CMOS battery health.

Purpose:

• Demonstrate a simple lineinfile checker
• Check for any CMOS batteries that need to be replaced

Steps:

1. Create file /home/ansible/my-project/cmos-check.yml

   • cmos-check.yml

     ---
     - hosts: nodes
       become: true
       become_user: root
       tasks:
         - name: CMOS battery health
           lineinfile:
             path: /proc/drive/rtc
             line: "batt_status	: okay"
             status: present
           check_mode: true
           register: cmos_battery_ok
         - name Set hardware clock
           - command: hwclock -w

2. Test the playbook
   • ansible-playbook -i hosts cmos-check.yml

Congratulations on getting this far! Next up is installing Folding at Home (FAH)