Question

我想检查终端主机中是否存在服务。

所以，我刚刚做了如下的剧本。

---

- hosts: '{{ host }}'
  become: yes
  vars:
    servicename:
  tasks:

  - name: Check if Service Exists
    stat: 'path=/etc/init.d/{{ servicename }}'
    register: servicestatus
    with_items: '{{ servicename }}'

  - name: Show service service status
    debug:
      msg: '{{ servicename }} is exists.'
    with_items: '{{ servicename }}'
    when: servicestatus.stat.exists

然后，我尝试将此playbook执行到我的主机，该主机已经运行Nginx，如下所示。

ansible-playbook cheknginxservice.yml -i /etc/ansible/hosts -e 'host=hostname' -e 'servicename=nginx'

我得到了这样的错误。

 FAILED! => {"failed": true, "msg": "The conditional check 'servicestatus.stat.exists' failed. The error was: error while evaluating conditional (servicestatus.stat.exists): 'dict object' has no attribute 'stat'\n\nThe error appears to have been in '/home/centos/cheknginxservice.yml': line 13, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n    with_items: '{{ servicename }}'\n  - name: Show service servicestatus\n    ^ here\n"}
        to retry, use: --limit @/home/centos/cheknginxservice.retry

所以，我认为问题在于使用相关条件时的stat模块。

Answer 1

您为什么使用with_items？您计划通过多项服务？这很重要，因为如果您使用with_items，结果将是一个列表。只需删除with_items即可。如果您想传递多项服务，则必须循环浏览with_items并使用item代替servicename。

  - name: Check if Service Exists
    stat: 'path=/etc/init.d/{{ servicename }}'
    register: servicestatus

  - name: Show service service status
    debug:
      msg: '{{ servicename }} is exists.'
    when: servicestatus.stat.exists

Ansible中没有本地方法来检查服务的状态。您可以使用shell模块。注意我使用了sudo。你的情况可能不同。

  - name: check for service status
    shell: sudo service {{ servicename }} status
    ignore_errors: true
    register: servicestatus

  - name: Show service service status
    debug:
      msg: '{{ servicename }} exists.'
    when: servicestatus.rc | int == 0

如何检查Ansible存在的任何服务？

1 个答案: