We have by far the largest RPM repository with NGINX module packages and VMODs for Varnish. If you want to install NGINX, Varnish, and lots of useful performance/security software with smooth 
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yum upgrades for production use, this is the repository for you.
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Ansible is something I really love to use. It makes server setups a breeze, provided you know how to code a decent playbook.
I present you with an always up-to-date list of Ansible tricks. Learn how to easily achieve tasks which are not available using standard modules.
Ensure directory is empty
Make an empty directory on your ansible host and synchronize it to remote dir:
- name: Empty remote directory
  synchronize:
    src: empty/
    dest: "{{ remote_dir }}/"
    delete: yes
    recursive: yes
Credit: Original post
Ensure file is empty
- name: "ensure empty log file exists (important for fail2ban)"
  copy:
    content: ""
    dest: /var/log/example.log
    force: yes
    owner: root
    group: root
    mode: 0600

