This is the second NUC in the Stack of NUCs. This will be the Ansible controller, the Control Node. We will build it using the USB install and autoconfiguration method we tested with NUC 1.

Ansible terms:

• Control node - A system on which Ansible is installed. You run Ansible commands such as ansible or ansible-inventory on a control node.
• Managed node - A remote system, or host, that Ansible controls.
• Inventory - A list of managed nodes that are logically organized. You create an inventory on the control node to describe host deployments to Ansible.

References

• https://cloudinit.readthedocs.io/en/latest/reference/examples.html
• https://docs.ansible.com/ansible/latest/getting_started/index.html

Hardware:

• i3
• D34010WYK
• Haswell NUC D34010WYK and D54250WYK: BIOS version 0054 (9/2/2019)
• https://www.intel.com/content/www/us/en/download/17536/bios-update-wylpt10h.html
• 8GB RAM
• 32GB or more storage
• Wireless

Software:

• Ubuntu 22.04 LTS server

Purpose:

• Ansible controller

Steps:

1. Modify the CIDATA USB stick file user_data to set up an Ansible controller

   • #cloud-config
     autoinstall:
       version: 1
       ssh:
         install-server: true
         # option "allow-pw" defaults to `true` if authorized_keys is empty, `false` otherwise.
         allow-pw: false
      
       # "[late-commands] are run in the installer environment with the installed system mounted at /target."
       late-commands:
         # randomly generate the hostname & show the IP at boot
         - echo nuc-ansible-$(openssl rand -hex 3) > /target/etc/hostname
         # dump the IP out at login screen
         - echo "Ubuntu 22.04 LTS \nIP - $(hostname -I)\n" > /target/etc/issue
         # merge storage to use 100% use of the file system
         - curtin in-target --target=/target -- lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
         - curtin in-target --target=/target -- resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
         # shut-down the host to avoid an infinite installer loop
         - shutdown -h now
     
       user-data:
         disable_root: true
         timezone: America/New_York
         package_upgrade: false
         packages:
         - network-manager
         - lldpd
         - git
         - python3-pip
         - ansible
         - arp-scan
         runcmd:
         - nmcli d wifi connect SSID password PASSWORD
         users:
           - name: tux
             primary_group: users
             groups: sudo
             lock_passwd: true
             # don't need PW since using SSH, leaving this in though...
             # password is "changeme" - created with `docker run -it --rm alpine mkpasswd --method=SHA-512`
             # passwd: "$5$IWwNqL9VUSDoc4Jv$DEUGR.cZQcbz/QvdCOmU13fX5ZW0rANg8LqkAtX3nBA"
             shell: /bin/bash
             # use cat ~/.ssh/id_rsa.pub or generate to get your public key
             ssh_authorized_keys:
               - "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABgQDTK3YYoKho9SvTejt9430NRwu5ZQpwtAQGBbX8piLvLfsrJzzXxWljTvmC63VMAbCy3ii/Z4yReeCt4h7JiFNf+4ggfUmG+SN+6WvRlfKdaQBXKqojNNxVDg/M73CYF/CYjifJYombA1WIFYoZwMSnd4pzuS7pSiMFKEYTznmImgqa40uZfK6My98KTFpbuebeRvF1u/2Q2ISEYRQmHbm79NAj2WPoI73vNDtkKOPn8NU13xQgC4EMlk/Yu0p36THYlMl30iJePhFgNNBTxXBZL41+nn6W9wgfwo78VDNSa0A2Cambad/lYEerSWevsPATU7bf2an7RsDJhvCx58hI4BMl0KQ3/R0MT2OSGU+GHjBzL/T9UHIxN1FynzmwYpI96MEmEqETjG2DzboO93Oo5EkuX/e6wo/ptQ1g9Qarmk66E0shYpTtwQn2mz0Lhv8PD9C/CbZl9QqcQ43yah1MD9PH/OaCj32FpBqDNJp+NuyYbjBDhG5TgGza4yrgww8= jimangel@Jims-MacBook-Pro.local"
             sudo: ALL=(ALL) NOPASSWD:ALL
           - name: ansible
             gecos: Ansible User
             primary_group: users
             groups: sudo
             sudo: ALL=(ALL) NOPASSWD:ALL
             shell: /bin/bash
             lock_passwd: true
             ssh_authorized_keys:
               - "ssh-rsa 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 jimangel@Jims-MacBook-Pro.local"
         ansible:
           install_method: pip
           package_name: ansible
           run_user: ansible
           galaxy:
             actions:
               - ["ansible-galaxy", "collection", "install", "community.general"]
           setup_controller:
             repositories:
               - path: /home/ansible/my-repo
                 source: git@github.com:doritoes/nuc-ansible-lab.git
         # shutdown after first host initial provisioning
         power_state:
           mode: poweroff

2. Boot with the custom Lab bootable USB and the customized CIDATA USB inserted
   • with the NUC powered off, insert both USB sticks
   • power on the NUC, and press F10 when prompted
   • select the UEFI USB boot option
     • be patient as the system is configured
     • after a while, the device will power down
   • remove the USB sticks from the NUC and power it back on
     • be patient it is completes configuration and powers down again
   • WiFi should be working now; you can disconnect the ethernet cable if you'd like, relocate it, etc., and then power it back on
3. By default, Ansible default configuration file and inventory file is located at /etc/ansible/ansible.cfg and /etc/ansible/hosts respectively.
4. Log in to NUC 2 from NUC 1:
   • ssh ansible@[IP ADDRESS NUC2]
5. Generate keys
   • ssh-keygen -o
   • press enter to accept defaults to all prompts
6. View the key, which you will use for building the remaining NUCs
   • cat ~/.ssh/id_rsa.pub
7. Ansible is now installed, but with no inventory file(s) or configuration
   • ansible –version
8. Set up some files for Ansible; we will be configuring/adding the new NUCs under [nodes] later

   • mkdir my-project
     cat <<'EOF' > my-project/hosts
     [all:vars]
     ansible_python_interpreter=/usr/bin/python3
     ansible_user='ansible'
     ansible_become=yes
     ansible_become_method=sudo
      
     [nodes]
      
     EOF

9. Exit back to your NUC 1 session
10. Test running a remote command using SSH
    • ssh ansible@[IP ADDRESS NUC2] “sudo apt update && sudo apt upgrade -y”
11. You are now ready to build more more NUCs! Continue with NUC 3