仅检查文件中是否存在一行(可翻译) [英] Only check whether a line present in a file (ansible)

问题描述

在Ansible中，我需要检查文件中是否存在特定行.基本上，我需要将以下命令转换为可完成的任务.我的目标是只检查.

In ansible, I need to check whether a particular line present in a file or not. Basically, I need to convert the following command to an ansible task. My goal is to only check.

grep -Fxq "127.0.0.1" /tmp/my.conf

推荐答案

- name: Check whether /tmp/my.conf contains "127.0.0.1"
  command: grep -Fxq "127.0.0.1" /tmp/my.conf
  register: checkmyconf
  check_mode: no
  ignore_errors: yes
  changed_when: no

- name: Greet the world if /tmp/my.conf contains "127.0.0.1"
  debug: msg="Hello, world!"
  when: checkmyconf.rc == 0

更新2017-08-28::较旧的Ansible版本需要使用always_run: yes而不是check_mode: no.

Update 2017-08-28: Older Ansible versions need to use always_run: yes instead of check_mode: no.

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