☰

如果任何安装点无法满足断言，我希望任务终止

tag-icon • tag-icon ansible
如果任何安装点无法满足断言，我希望任务终止

我需要一些有关此剧本的帮助。我使用断言模块断言磁盘空间小于 30%，并发送带有失败消息的松弛通知。 Assert模块循环遍历服务器中的所有FS（大约10个FS）。 slack 上发送的消息不符合预期。我想要实现的只是仅显示循环中失败的项目。仅显示断言失败项的消息。

tasks:
    - name: 
      assert:
        that: "{{ item.size_available > item.size_total | float * 0.30 }}"
        msg: "Filesystem: {{ item.mount }} has less than 30% space. Consider increasing the FS size"
        #success_msg: "Filesystem: {{ item.mount }} has more than 30% space. No action required"
      register: fs_space
      loop: "{{ ansible_mounts }}"
      loop_control:
        label: ""
      ignore_errors: true

    - debug:
        msg: "HOST {{ ansible_hostname }}: {{ fs_space.results | json_query('[*].msg') }}
      when: true in fs_space.results | json_query('[*].failed')

最终结果如下所示：

HOST XYZ: [u'All assertions passed', u'All assertions passed', u'All assertions passed', u'All assertions passed', u'All assertions passed', u'Filesystem: /usr has less than 30% space. Consider increasing the FS size', u'All assertions passed', u'All assertions passed', u'All assertions passed', u'All assertions passed']

但我需要的消息只是这样：

HOST XYZ: Filesystem: /usr has less than 30% space. Consider increasing the FS size'

答案1

问：”如果任何安装点无法满足断言，我希望任务终止。”

答：简化条件。例如

shell> cat playbook.yml
- hosts: localhost
  vars:
    my_mounts: [500, 600,700]
  tasks:
    - assert:
        that: mounts_all == mounts_ok
      vars:
        mounts_all: "{{ my_mounts|length }}"
        mounts_ok: "{{ my_mounts|select('gt', 400)|length }}"

给出

TASK [assert] ******************************************************
ok: [localhost] => {
    "changed": false,
    "msg": "All assertions passed"
}

如果您不想显示结果，请将回调静音。例如

shell> ANSIBLE_DISPLAY_OK_HOSTS=false ansible-playbook playbook.yml

有关回调的详细信息，请参见

shell> ansible-doc -t callback default

如果其中任何一项不满足条件，游戏就会失败。例如

    - assert:
        that: mounts_all == mounts_ok
      vars:
        mounts_all: "{{ my_mounts|length }}"
        mounts_ok: "{{ my_mounts|select('gt', 600)|length }}"

给出

TASK [assert] *******************************************************
fatal: [localhost]: FAILED! => {
    "assertion": "mounts_all == mounts_ok",
    "changed": false,
    "evaluated_to": false,
    "msg": "Assertion failed"
}

问：”仅显示断言失败项的消息。”

A：如果要显示失败的挂载点，请添加调试任务。例如

- hosts: localhost
  vars:
    my_mounts:
      - {dev: da0, size: 500}
      - {dev: da1, size: 600}
      - {dev: da2, size: 700}
  tasks:
    - debug:
        msg: >
          Filesystems: {{ mounts_fail }} failed.
          Consider increasing the FS size.
      when: mounts_fail|length > 0
      vars:
        mounts_fail: "{{ my_mounts|
                         selectattr('size', 'lt', 600)|
                         map(attribute='dev')|list }}"
    - assert:
        that: mounts_all == mounts_ok
      vars:
        mounts_all: "{{ my_mounts|length }}"
        mounts_ok: "{{ my_mounts|
                       selectattr('size', 'gt', 600)|length }}"

给出

TASK [debug] *******************************************************
ok: [localhost] => {
    "msg": "Filesystems: ['da0'] failed. Consider increasing the FS size.\n"
}

TASK [assert] ******************************************************
fatal: [localhost]: FAILED! => {
    "assertion": "mounts_all == mounts_ok",
    "changed": false,
    "evaluated_to": false,
    "msg": "Assertion failed"
}

相关内容