test_stuff.yml

---
- hosts:
  - kubernetes_master
  - kubernetes_worker
  become: yes
  tasks:

  - name: debug this
    debug:
      msg: "{{ ansible_default_ipv4['address'] }}"

  - name: increase mmap counts
    lineinfile:
      path: /etc/sysctl.conf
      regexp: '^vm.max_map_count='
      line: 'vm.max_map_count=262144'

  - name: increase ulimit counts
    lineinfile:
      path: /etc/security/limits.conf
      line: "{{ item }}"
    with_items:
    - "user soft     nofile         65536"
    - "root soft     nofile         65536"
    - "user hard     nofile         65536"
    - "root hard     nofile         65536"
    - "* soft     nofile         65536"
    - "* hard     nofile         65536"

  - name: increase ulimit counts
    lineinfile:
      path: /etc/pam.d/common-session
      line: "session required pam_limits.so"

  - name: increase ulimit counts
    lineinfile:
      path: /etc/pam.d/common-session-noninteractive
      line: "session required pam_limits.so"