Ansible playbook - include_role 和 delegate_to 是否一起工作

Question

include_role 和 delegate_to 在 Ansible 2.9 中是否一起工作，因为我试图通过运行一个角色并将其委派给主机 2（下面的代码）来执行以下剧本？

Ansible 剧本

- name: top level playbook
  hosts: ["host1", "host2"]
  connection: local
  gather_facts: true
  ignore_errors: no
  tasks:
    - set_fact:
        playbook_dir: /Users/OneDrive 
        validation_overall: 'pass'
        result: {}
        all_hosts: "{{ ansible_play_hosts }}"

    - name: import hostvars
      include_vars:
        dir: '{{ playbook_dir }}/test_env_vars/hostvars'
        files_matching: '{{ inventory_hostname }}.*'

    - name: initialise required input variables
      set_fact:
        input_interfaces: "{{ e_input_interfaces }}"  

    # delegate role to host2
    - name: "call validate_rtr_state role with host '{{ansible_hostname}}' for hosts in '{{ansible_play_hosts}}'"
      include_role:
        name: validate_rtr_state
        tasks_from: cisco-ios-xr_ping.yml
      apply:
        delegate_to: "{{all_hosts[1]}}"
      loop: "{{ansible_play_hosts}}"
      loop_control:
        loop_var: all_hosts[1]

我收到的错误信息如下：

ERROR! conflicting action statements: apply, include_role

The error appears to be in '/home/bbann/Ansible-Networking/ha_failover_top_level_reload.yml': line 46, column 7, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:

    # delegate role to tusredrweca908
    - name: "call validate_rtr_state role with host '{{ansible_hostname}}' for hosts in '{{ansible_play_hosts}}'"
      ^ here

我们可能错了，但这个看起来可能是一个问题 缺少引号。总是引用模板表达式括号 开始一个值。例如：

with_items:
  - {{ foo }}

应该写成：

with_items:
  - "{{ foo }}"

任何想法为什么会失败？

Answer 1

“错误！冲突的操作语句：apply, include_role”

apply 的缩进错误。是任务include_role的参数

# delegate role to host2
    - name: "call validate_rtr_state role with host '{{ ansible_hostname }}' for hosts in '{{ ansible_play_hosts }}'"
      include_role:
        name: validate_rtr_state
        tasks_from: cisco-ios-xr_ping.yml
        apply:
          delegate_to: "{{ all_hosts[1] }}"
      loop: "{{ ansible_play_hosts }}"
      loop_control:
        loop_var: all_hosts[1]

^未测试

还有其他怪人：

1. loop_var 是第二台主机的名字吗？即，该角色是否真的将第二台主机的名称作为变量实现？

2. 剧中有2位主持人都是connection: local?

3. 为什么是apply delegate_to: xy 而不是delegate_to: xy 这个任务？