Ansible 将文件发送到第一个遇到的目的地 [英] Ansible send file to the first met destination

问题描述

我正在为数千个节点发送一个配置文件，由于某些自定义，该文件可能有 5 或 6 个路径(主机只有一个文件，但路径可能会有所不同)并且没有一种简单的方法可以用事实找出默认位置.

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.

基于此，我正在寻找某种方法来设置复制模块的dest"，就像我们可以设置src"一样，使用 with_first_found 循环.

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.

类似的东西:

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:我正在发送 nrpe.cfg，所以如果有人知道找到默认 nrpe.cfg 位置的更好方法，那就容易多了.

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:我设法在@ydaetskcoR 的帮助下像这样工作:

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}}"

推荐答案

一种选择可能是简单地搜索已经存在的 nrpe.cfg 文件，然后将该位置注册为要使用的变量用于复制任务.

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.

您可以通过仅使用 find 的 shell/命令任务来执行此操作，也可以使用 stat 检查它们是否存在.

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.

所以你可能有这样的事情:

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

正如 Mxx 在评论中指出的那样，我们还有第三个任务要回退到复制到某个默认路径(如果 find 没有找到 nrpe.cfg 文件，则可能是 /etc/nagios/ 或任何其他路径.

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.

要使用 stat 而不是 shell/命令任务，您可以执行以下操作:

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}}"

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