---
- name: BBR Kernel Modul laden
  ansible.builtin.modprobe:
    name: tcp_bbr
    state: present

- name: BBR Modul beim Boot laden
  ansible.builtin.copy:
    content: "tcp_bbr\n"
    dest: /etc/modules-load.d/bbr.conf
    mode: "0644"

- name: Sysctl Parameter setzen
  ansible.posix.sysctl:
    name: "{{ item.key }}"
    value: "{{ item.value }}"
    sysctl_file: /etc/sysctl.d/99-net-tuning.conf
    reload: true
    state: present
  loop:
    - { key: net.core.rmem_default,              value: "262144" }
    - { key: net.core.wmem_default,              value: "262144" }
    - { key: net.core.rmem_max,                  value: "67108864" }
    - { key: net.core.wmem_max,                  value: "67108864" }
    - { key: net.ipv4.tcp_rmem,                  value: "4096 87380 67108864" }
    - { key: net.ipv4.tcp_wmem,                  value: "4096 65536 67108864" }
    - { key: net.ipv4.tcp_window_scaling,        value: "1" }
    - { key: net.ipv4.tcp_congestion_control,    value: "bbr" }
    - { key: net.ipv4.tcp_slow_start_after_idle, value: "0" }
    - { key: net.ipv4.tcp_fastopen,              value: "3" }
    - { key: net.core.netdev_max_backlog,        value: "16384" }
    - { key: net.core.somaxconn,                 value: "4096" }
    - { key: net.ipv4.tcp_notsent_lowat,         value: "16384" }
    - { key: net.ipv4.tcp_fin_timeout,           value: "15" }
    - { key: net.ipv4.tcp_tw_reuse,              value: "1" }
    - { key: vm.swappiness,                      value: "1" }
    - { key: vm.dirty_ratio,                     value: "15" }
    - { key: vm.dirty_background_ratio,          value: "5" }
    - { key: net.ipv4.tcp_mtu_probing,           value: "1" }
    - { key: net.ipv4.ip_forward,                value: "1" }
    - { key: net.ipv6.conf.all.forwarding,       value: "1" }