Ansible send file to the first met destination

问题

I'm sending a config file for thousands of nodes, because of some customisation there's maybe 5 or 6 paths to that file (There's only one file for host but the path can vary) and there isn't a easy way to figure out the default location with facts.

Based on this, I'm looking for some way to set the "dest" of copy module like we can set the "src", with a with_first_found loop.

Something like that:

copy: src=/foo/{{ ansible_hostname }}/nrpe.cfg dest="{{item}}
with_items:
    - "/etc/nagios/nrpe.cfg"
    - "/usr/local/nagios/etc/nrpe.cfg"
    - "/usr/lib64/nagios/etc/nrpe.cfg"
    - "/usr/lib/nagios/etc/nrpe.cfg"
    - "/opt/nagios/etc/nrpe.cfg"

PS: I'm sending nrpe.cfg so if someone knows a better way to find where's the default nrpe.cfg it will be a lot easier.

EDIT 1: I've managed to work with the help from @ydaetskcoR like this:

- name: find nrpe.cfg
  stat:
    path: "{{ item }}"
  with_items:
    - "/etc/nagios/nrpe.cfg"
    - "/usr/local/nagios/etc/nrpe.cfg"
    - "/usr/lib64/nagios/etc/nrpe.cfg"
    - "/usr/lib/nagios/etc/nrpe.cfg"
    - "/opt/nagios/etc/nrpe.cfg"
  register: nrpe_stat
  no_log: True

- name: Copy nrpe.cfg
  copy: src=/foo/{{ ansible_hostname }}/nrpe.cfg dest="{{item.stat.path}}"
  when: item.stat.exists
  no_log: True
  with_items:
    - "{{nrpe_stat.results}}"

回答1:

One option could be to simply search for the already existing nrpe.cfg file and then register that location as a variable to be used for the copy task.

You could do that either through a shell/command task that just uses find or loop through a bunch of locations with stat to check if they exist.

So you might have something like this:

- name: find nrpe.cfg
  shell: find / -name nrpe.cfg
  register: nrpe_path

- name: overwrite nrpe.cfg
  copy: src=/foo/{{ ansible_hostname }}/nrpe.cfg dest="{{item}}"
  with_items:
    - nrpe_path.stdout_lines
  when: nrpe_path.stdout != ""
  register: nrpe_copied

- name: copy nrpe.cfg to box if not already there
  copy: src=/foo/{{ ansible_hostname }}/nrpe.cfg dest="{{ default_nrpe_path }}"
  when: nrpe_copied is not defined

As Mxx pointed out in the comments, we have a third task to fall back to copying to some default path (potentially /etc/nagios/ or any other path really) if the nrpe.cfg file hasn't been found by find.

To use stat rather than a shell/command task you could do something like this:

- name: find nrpe.cfg
  stat: 
    path: {{ item }}
  with_items:
    - "/etc/nagios/nrpe.cfg"
    - "/usr/local/nagios/etc/nrpe.cfg"
    - "/usr/lib64/nagios/etc/nrpe.cfg"
    - "/usr/lib/nagios/etc/nrpe.cfg"
    - "/opt/nagios/etc/nrpe.cfg"
  register: nrpe_stat

- name: overwrite nrpe.cfg
  copy: src=/foo/{{ ansible_hostname }}/nrpe.cfg dest="{{item.stat.path}}"
  when: item.stat.exists
  with_items:
    - "{{nrpe_stat.results}}"

来源：https://stackoverflow.com/questions/34344321/ansible-send-file-to-the-first-met-destination