如何在安装角色之前等待ssh在主机上可用？

有没有办法在安装角色之前等待 ssh 在主机上可用？有，wait_for_connection但我只知道如何将它与任务一起使用。

在尝试安装角色之前，此特定剧本会在云提供商上启动服务器。但由于主机上的 ssh 服务尚不可用而失败。

我应该如何解决这个问题？

---
- hosts: localhost
  connection: local
  tasks:
    - name: Deploy vultr servers
      include_tasks: create_vultr_server.yml
      loop: "{{ groups['vultr_servers'] }}"

- hosts: all
  gather_facts: no

  become: true

  tasks:
    - name: wait_for_connection # This one works
      wait_for_connection:
        delay: 5
        timeout: 600

    - name: Gather facts for first time
      setup:

    - name: Install curl
      package:
        name: "curl"
        state: present

  roles: # How to NOT install roles UNLESS the current host is available ?
    - role: apache2
      vars:
        doc_root: /var/www/example
        message: 'Hello world!'
    - common-tools

回答

- hosts: all
  gather_facts: no

  become: true
  
  pre_tasks:
    - name: wait_for_connection # This one works
      wait_for_connection:
        delay: 5
        timeout: 600
  
  roles: ...
  
  tasks: ...