重新加载 Ansible 的动态库存 [英] Reload Ansible's dynamic inventory

问题描述

我正在使用 Ansible 设置 EC2 实例并部署应用程序.有一个主机脚本，用于收集与标签相关的服务器和组信息.我想将这些操作作为一个剧本来运行，所以

I'm using Ansible to setup EC2 instances and deploy an app. There's a hosts script which gathers tags related servers and groups info. I'd like to run these actions as a single playbook, so

1. 根据需要创建新实例
2. Hosts 脚本加载库存(包括服务器的事实)
3. 部署手册有效

但是，库存是提前加载的，因此如果在播放期间创建/更新服务器，则没有服务器/组数据.我可以 1) 将供应和部署剧本分开 2) 使用 add_host 技巧在服务器更新时模拟动态库存，但这些方法存在缺陷.

However, inventory loaded in advance so there is no servers/groups data if servers created/updated during the play. I can 1) separate provision and deployment playbooks 2) use add_host trick to emulate dynamic inventory when servers are updated, but there are drawbacks in those approaches.

我可以强制 Ansible 重新加载库存吗?我的测试文件是:hosts 脚本:

Can I force Ansible to reload inventory? My test files are: hosts script:

#!/bin/sh
echo `date` >> log.log
echo "{\"standalone\":[\"localhost\"]}"

示例playbook.yml:

---
- hosts: all
  tasks:
    - name: show inventory_hostname
      command: echo {{ inventory_hostname }}

我运行它 ansible-playbook -i hosts playbook.yml -v 并看到 两次 运行:

I run it ansible-playbook -i hosts playbook.yml -v and see two runs:

$> cat log.log
Thu Mar 12 09:43:16 SAMT 2015
Thu Mar 12 09:43:16 SAMT 2015

但我还没有找到将它加倍的命令.

but I haven't found a command to double it.

推荐答案

借助 Ansible 2.0+，您可以通过运行 任务:

With Ansible 2.0+, you can refresh your inventory mid-play by running the task:

- meta: refresh_inventory

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