如何获取 Ansible hosts 文件中定义的当前机器的主机名? [英] How to get the host name of the current machine as defined in the Ansible hosts file?

问题描述

我正在设置 Ansible playbook 来设置几个服务器.如果当前主机是我的本地开发主机(在我的主机文件中命名为local")，我只想运行几个任务.我怎样才能做到这一点?我在文档的任何地方都找不到.

I'm setting up an Ansible playbook to set up a couple servers. There are a couple of tasks that I only want to run if the current host is my local dev host, named "local" in my hosts file. How can I do this? I can't find it anywhere in the documentation.

我已经尝试过这个 when 语句，但它失败了，因为 ansible_hostname 解析为创建机器时生成的主机名，而不是您在主机文件中定义的主机名.

I've tried this when statement, but it fails because ansible_hostname resolves to the host name generated when the machine is created, not the one you define in your hosts file.

- name: Install this only for local dev machine
  pip: name=pyramid
  when: ansible_hostname == "local"

推荐答案

必要的变量是 inventory_hostname.

The necessary variable is inventory_hostname.

- name: Install this only for local dev machine
  pip: name=pyramid
  when: inventory_hostname == "local"

它在文档中有些隐藏在本节底部.

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