- name: Check remote IP set
  assert:
    that:
      - netconsole_remote_ip is defined
      - netconsole_remote_port is defined
    fail_msg: "Must set remote host and port"

- name: Register netconsole target var
  set_fact:
    nc_target: '/sys/kernel/config/netconsole/target1'

- name: Everything needs root
  become: yes
  block:

    # netconsole requires the device to send packtes from and the
    # destination MAC.  This works for hosts on the same subnet, but the
    # way to get packets out to the world is to specify the default gw as
    # the remote destination.

    - name: Get default gateway
      shell: "ip route | grep default | awk '{print $3}'"
      register: default_gw_cmd

    - name: Save default gateway
      set_fact:
        default_gw: '{{ default_gw_cmd.stdout }}'

    - name: Get default gateway MAC
      shell: "arp {{ default_gw }} | grep {{ default_gw }} | awk '{print $3}'"
      register: default_gw_cmd_mac

    - name: Save default gateway MAC
      set_fact:
        default_gw_mac: '{{ default_gw_cmd_mac.stdout }}'

    - name: Get default device
      shell: "ip route | grep default | awk '{print $5}'"
      register: default_gw_cmd_dev

    - name: Save default device
      set_fact:
        default_gw_dev: '{{ default_gw_cmd_dev.stdout }}'

    - name: Install configfs
      command: modprobe configfs

    - name: Install netconsole
      command: modprobe netconsole

    - name: Mount configfs
      mount:
        path: /sys/kernel/config
        fstype: configfs
        src: configfs
        state: mounted

    - name: Make netconsole target directory
      file:
        path: '{{ nc_target }}'
        state: directory
        mode: 0755

    - name: Configure gateway
      shell: 'echo {{ default_gw_dev }} > {{ nc_target }}/dev_name'

    - name: Configure gateway MAC
      shell: 'echo {{ default_gw_mac }} > {{ nc_target }}/remote_mac'

    - name: Configure remote IP
      shell: 'echo {{ netconsole_remote_ip }} > {{ nc_target }}/remote_ip'

    - name: Configure remote port
      shell: 'echo {{ netconsole_remote_port }} > {{ nc_target }}/remote_port'

    - name: Enable netconsole
      shell: 'echo 1 > {{ nc_target }}/enabled'

    - name: Turn up dmesg
      command: dmesg -n 8

    - name: Send a test message
      shell: "echo 'netconsole enabled' > /dev/kmsg"