---
- name: Common OS prerequisites for all k8s nodes
  hosts: k8s
  become: true

  tasks:
    - name: Disable swap now
      command: swapoff -a
      when: ansible_facts['swaptotal_mb'] > 0

    - name: Remove swap from /etc/fstab
      replace:
        path: /etc/fstab
        regexp: '^([^#].*\s+swap\s+.*)$'
        replace: '# \1'

    - name: Load kernel modules at boot
      copy:
        dest: /etc/modules-load.d/k8s.conf
        content: |
          overlay
          br_netfilter

    - name: Load kernel modules now
      modprobe:
        name: "{{ item }}"
      loop:
        - overlay
        - br_netfilter

    - name: Set sysctl for k8s networking
      copy:
        dest: /etc/sysctl.d/k8s.conf
        content: |
          net.bridge.bridge-nf-call-iptables  = 1
          net.bridge.bridge-nf-call-ip6tables = 1
          net.ipv4.ip_forward                 = 1

    - name: Apply sysctl
      command: sysctl --system