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

This is the third NUC in the Stack of NUCs. This will be an Ansible member node. We will build it using the USB install and automation methods used for NUC 1 and NUC 2.

Steps:

1. Add the IP addresses (alternatively, use host file on NUC 2 to map names) to /home/ansible/my-project/hosts
2. Create file /home/ansible/my-project/update.yml

   • - hosts: nodes
       become: true
       become_user: root
       tasks:
         - name: Update apt repo and cache on all Debian/Ubuntu boxes
           apt: update_cache=yes force_apt_get=yes cache_valid_time=3600
     
         - name: Upgrade all packages on servers
           apt: upgrade=dist force_apt_get=yes
     
         - name: Check if a reboot is needed on all servers
           register: reboot_required_file
           stat: path=/var/run/reboot-required get_md5=no
     
         - name: Reboot the box if kernel updated
           reboot:
             msg: "Reboot initiated by Ansible for kernel updates"
             connect_timeout: 5
             reboot_timeout: 300
             pre_reboot_delay: 0
             post_reboot_delay: 30
             test_command: uptime
           when: reboot_required_file.stat.exists

3. Test the playbook
   • ansible-playbook -i hosts update.yml