Ansible：在任务中访问Shell Var

Question

执行此操作的正确方法是什么：我有一个shell模块的任务，它从Bash shell导出var。

我是否可以从另一个任务（可能是设置环境？）访问所述var而无需注册命令输出并解析shellvar_register.stdout？ Ansible的范围是localhost和远程主机的ansible_env吗？

---

- name: test var play
  hosts: localhost
  tasks:
  - name: export shell var
    become: no
    local_action: shell export shellvar=foo
    args:
      executable: /bin/bash
    #register: shellvar_register

  - name: print debug msg
    local_action:
      module: debug
      msg: "{{ ansible_env.shellvar }}"

% ansible-playbook playbooks/test/test_shellvar.yml                                                                                                           
PLAY [test var play] ***

TASK [Gathering Facts] ***
ok: [localhost]

TASK [export shell var] ***
changed: [localhost -> localhost]

TASK [print debug msg] ***
fatal: [localhost]: FAILED! => {"msg": "The task includes an option 
with an undefined variable. The error was: 'dict object' has no 
attribute
'shellvar'\n\nThe error appears to be in '/home/robert/tmp/common.git
/playbooks/test/test_shellvar.yml': line 12, column 5, but may\nbe 
elsewhere in the file depending on the exact syntax problem.\n\nThe 
offending line appears to be:\n\n\n  - name: print debug msg\n    ^ 
here\n"}
to retry, use: --limit @/home/robert/tmp/common.git/playbooks
/test/test_shellvar.retry

PLAY RECAP ***
localhost: ok=2 changed=1 unreachable=0 failed=1 skipped=0

Answer 1

C.F. https://docs.ansible.com/ansible/latest/user_guide/playbooks_variables.html#registering-variables

任务结束后，shell将退出。只需将值作为ansible值捕获以供以后使用。

  - name: set a var
    command: 'echo foo'
    register: not_a_shell_var

  - name: show it
    debug:
      msg: "{{ not_a_shell_var.stdout }}"

Answer 2

您可以在Ansible: Store command's stdout in new variable?中使用set_fact并设置一个新的ansible变量，您也可以在其他游戏中使用它。

- hosts: loc
  tasks:
    - name: set a ansible variable for later use
      set_fact:
        new_ansible_var: "foo"
    - name: run a command with this var
      shell: "shellvar={{ new_ansible_var }} {{ playbook_dir }}/bash_script_using_shellvar.sh"

第一个任务设置ansible_variable。第二个任务将此变量用于shellvar，因此bashscript可以使用shellvar。