无法从角色触发特定主机**的任务

Question

我想在一个游戏手册中对一个主机运行一个特定的任务。有什么更好的方法吗？

自订剧本

---
- hosts: swarm_manager
  roles:
  - custom_role

角色/自定义角色/任务/main.yml

---
- name: checking for ip
  shell: docker service ps service | grep Running | head -n1 | awk '{print $1}'
  register: ip

- name: killing the container
  **hosts: "{{ip.stdout}}"**
  shell: docker kill $(docker service ps | grep service | awk '{print $1}')

Answer 1

您可以限制以下操作：

---
- name: checking for ip
  shell: docker service ps service | grep Running | head -n1 | awk '{print $1}'
  register: ip

- name: killing the container
  run_once: true
  delegate_to: "{{ip.stdout}}"
  shell: docker kill $(docker service ps | grep service | awk '{print $1}')

我用这种方法测试过：

---
- hosts: linux
  roles:
  - test_role

然后：

- name: Set Fact
  set_fact:
    ip: 10.100.10.10

- name: Debug
  debug:
    msg: "{{hostvars[groups['linux'][0]]['ansible_default_ipv4']['address']}}"
  run_once: true
  delegate_to: "{{ip}}"