Ansible playbook,在主机之间生成和共享变量

您可能希望尝试在本地主机上生成pass,然后将其复制到其他每台主机:

---
- hosts: localhost
  tasks:
  - name: Generate new password
    shell: "tr -dc _[:alnum:] < /dev/urandom | head -c${1:-20}"
    register: new_password    

- hosts: all
  tasks:
  - name: Set password as fact
    set_fact:
      my_global_var: "{{ hostvars['localhost'].new_password.stdout }}"

- hosts: db
  tasks:
  - debug: msg={{my_global_var}}

- hosts: web
  tasks:
  - debug: msg={{my_global_var}}

我知道这是一个老问题,但我选择了另一种方法,将这里提供的两个答案和 this issue 认为 它有点优雅。按2.8.4测试。

这是在我的环境中可行的解决方案,我希望在我的所有主机上都有一个通用的时间戳备份目录,以便以后恢复:

---
tasks:
  - name: Set local fact for the universal backup string
    set_fact:
      thisHostTimestamp: "{{ ansible_date_time.iso8601 }}"
    delegate_to: localhost
    delegate_facts: true

  - name: Distribute backup datestring to all hosts in group
     set_fact:
       backupsTimeString: "{{ hostvars['localhost']['thisHostTimestamp'] }}"

---
- hosts: all
  tasks:
  - name: Generate new password
    shell: "tr -dc _[:alnum:] < /dev/urandom | head -c${1:-20}"
    register: new_password  
    delegate_to: localhost
    delegate_facts: true

  - name: Set password as fact
    set_fact:
      my_global_var: "{{ hostvars['localhost'].new_password.stdout }}"