Ansible playbook example before install Fluentd

sample.yml

- hosts: all
  remote_user: eyasuyuki
  sudo: yes
  vars:
    limits_conf: /etc/security/limits.conf
    sysctl_conf: /etc/sysctl.conf
  tasks:
    - name: before install fluentd check ulimit
      shell: grep "{{ item }}" {{ limits_conf }}
      with_items:
        - "root soft nofile 65536"
        - "root hard nofile 65536"
        - "* soft nofile 65536"
        - "* hard nofile 65536"
      register: result
      ignore_errors: yes
    - name: before install fluentd set ulimit
      shell: echo '{{ item.item }}' >> {{ limits_conf }}
      with_items: result.results
      when: item.rc == 1
    - name: before install fluentd check sysctl
      shell: grep "{{ item }}" {{ sysctl_conf }}
      with_items:
        - "net.ipv4.tcp_tw_recycle = 1"
        - "net.ipv4.tcp_tw_reuse = 1"
        - "net.ipv4.ip_local_port_range = 10240    65535"
      register: result
      ignore_errors: yes
    - name: before install fluentd set sysctl
      shell: echo '{{ item.item }}' >> {{ sysctl_conf }}
      with_items: result.results
      when: item.rc == 1
    - name: before install fluentd sysctl restart
      command: /sbin/sysctl -w