在单个 Ansible 文件 playbook 中嵌入主机名无法找到主机

Question

作为基本学习实践，我在单个文件中构建了一个 ansible 剧本，这样我就可以理解这一切。

我的ansible剧本如下

---
- name: Basic Sanity Check Playbook
  hosts: all
  gather_facts: no
  vars:
    ansible_user: ansible
    ansible_ssh_pass: your_password_here
  tasks:
    - name: Check Disk Usage
      command: df -h
      register: disk_usage

    - name: Print Disk Usage
      debug:
        var: disk_usage.stdout_lines

    - name: Check Memory Usage
      command: free -m
      register: memory_usage

    - name: Print Memory Usage
      debug:
        var: memory_usage.stdout_lines

    - name: Check Uptime
      command: uptime
      register: system_uptime

    - name: Print Uptime
      debug:
        var: system_uptime.stdout_lines

# Inventory Section
- name: Inventory
  hosts:
    10.0.2.4:
      ansible_host: 10.0.2.4

我希望看到连接和结果，但我看到了这个错误

However i get error ERROR! Hosts list must be a sequence or string. Please check your playbook.

Answer 1

只需将脚本的末尾稍微更改为：

# Inventory Section
- name: Inventory
  hosts:
    - 10.0.2.4

或：

# Inventory Section
- name: Inventory
  hosts:
    - 10.0.2.4 ansible_host