install.yml

---
- name: Install some packages
  hosts: all

  vars:
    controller_hostname: "{{ lookup('env', 'HOSTNAME') }}"
    controller_hostname_domain: "{{ lookup('env', 'HOSTNAME').split('.')[1:] | join('.') }}"
    controller_domainname: "{{ lookup('env', 'DOMAINNAME') | default(controller_hostname_domain, true) }}"

  tasks:

    # Wait until host is ready
    - name: Wait for host {{inventory_hostname}} connection
      wait_for_connection:

    - name: Assign random RFC1981 net prefix
      set_fact:
        random_net_prefix: "192.168.{{ 128 | random + 127 }}"

    - name: Assign gadget net prefix from env or random default
      set_fact:
        gadget_net_prefix: "{{ lookup('env', 'GADGET_NET_PREFIX') | default(random_net_prefix, true) }}"

    - name: Assign domain
      set_fact:
        gadget_net_domain: "{{ lookup('env', 'GADGET_NET_DOMAIN') | default(controller_domainname, true) }}"

    # Install bridge-utils for bridging both usb ethernet interfaces
    - name: install bridge-utils
      package:
        name: bridge-utils
        state: present

    # Install avahi-autoipd for zeroconf networking (ipv4ll method) on usb[0,1]
    - name: install avahi-autoipd
      package:
        name: avahi-autoipd
        state: present

    # Configure mdns services for ssh/sftp
    - name: Configure ssh avahi service
      copy:
        src: /usr/share/doc/avahi-daemon/examples/ssh.service
        dest: /etc/avahi/services/
        remote_src: yes
      register: avahi_daemon_configuration

    - name: Configure ssh avahi service
      copy:
        src: /usr/share/doc/avahi-daemon/examples/sftp-ssh.service
        dest: /etc/avahi/services/
        remote_src: yes
      register: avahi_daemon_configuration

    # Install dnsmasq for dhcp over br0 interface
    - name: install dnsmasq
      package:
        name: dnsmasq
        state: present

    - name: Configure dnsmasq from template
      template:
        src: etc/dnsmasq.d/usb.conf.j2
        dest: /etc/dnsmasq.d/usb.conf
      register: dnsmasq_configuration

    # DEBUG Clone Reflow repo
    - name: Clone devuan-pi-gadgeteer repository
      git:
        repo: https://github.com/adam-burns/devuan-pi-gadgeteer
        dest: src/devuan-pi-gadgeteer
        version: master
        clone: yes
        update: yes

    # Add loading overlay module dwc2 to cmdline.txt
    - name: "Add loading overlay module dwc2 to cmdline.txt"
      become: yes
      become_user: root
      replace:
        path: /boot/cmdline.txt
        regexp: '^(.*)rootwait$'
        replace: '\1 rootwait modules-load=dwc2'
        backup: no
      register: cmdline_updated

    - name: Check if dtoverlay=dwc2 is present
      become: yes
      become_user: root
      lineinfile:
        state: absent
        path: "/boot/config.txt"
        regexp: "^dtoverlay=dwc2"
      check_mode: true
      changed_when: false # This just makes things look prettier in the logs
      register: check

    - name: Add dtoverlay=dwc2 if not present
      lineinfile:
        state: present
        path: "/boot/config.txt"
        line: "dtoverlay=dwc2"
      when: check.found == 0

    - name: Check if libcomposite module is configured in /etc/modules
      become: yes
      become_user: root
      lineinfile:
        state: absent
        path: "/etc/modules"
        regexp: "^libcomposite"
      check_mode: true
      changed_when: false # This just makes things look prettier in the logs
      register: check
    
    - name: Add libcomposite if not present
      lineinfile:
        state: present
        path: "/etc/modules"
        line: "libcomposite"
      when: check.found == 0

    # Configure USB Network Interfaces
    - name: Configure usb0 network interface
      ansible.builtin.copy:
        src: etc/network/interfaces.d/usb0.conf
        dest: /etc/network/interfaces.d/usb0.conf

    - name: Configure usb1 network interface
      ansible.builtin.copy:
        src: etc/network/interfaces.d/usb1.conf
        dest: /etc/network/interfaces.d/usb1.conf

    - name: Create br0 network config from template
      template:
        src: etc/network/interfaces.d/br0.conf.j2
        dest: /etc/network/interfaces.d/br0.conf
      register: bridge_configuration

    # Change /etc/hosts entry
    - name: Update the /etc/hosts file with node name
      lineinfile:
        path: "/etc/hosts"
        regexp: ".*\t{{ansible_hostname}}"
        # line: "{{ ansible_br0.ipv4.address }}\t{{ ansible_hostname }}"
        line: "{{ gadget_net_prefix }}.1\t{{ ansible_hostname }}"
        state: present
        backup: yes

    # Configure sysctl for IP forwarding
    - name: configure network forwarding
      ansible.builtin.copy:
        src: etc/sysctl.d/30-forwarding.conf
        dest: /etc/sysctl.d/30-forwarding.conf

    - name: Create /var/lib/dnsmasq if it does not exist
      ansible.builtin.file:
        path: /var/lib/dnsmasq
        state: directory
        mode: '0755'

    - name: Create /etc/boot.d if it does not exist
      ansible.builtin.file:
        path: /etc/boot.d
        state: directory
        mode: '0755'

    - name:  network masquerading set at boot
      ansible.builtin.copy:
        src: etc/boot.d/masquerade.nft
        dest: /etc/boot.d/masquerade
        mode: '0755'

    - name: usb_gadget set at boot
      ansible.builtin.copy:
        src: etc/boot.d/usb_gadget.sh
        dest: /etc/boot.d/usb_gadget
        mode: '0755'


    - name: install usb_gadget
      ansible.builtin.copy:
        src: usb_gadget
        dest: /usr/local/bin/usb_gadget
        mode: '0755'

    - name: reboot if necessary
      ansible.builtin.reboot:
        reboot_timeout: 3600
      when: cmdline_updated.changed