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

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

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)