匹配条件后，从stdout中筛选多个条目

Question

我试图得到池的名称，免费和总空间的每个存储池。下面是一个包含每个池细节的命令模块的标准输出。我将命令输出存储在var池中。我无法用调试解决这个问题。有人能帮忙吗?我该怎么做？我需要从下面的输出对每个池进行调试(pool_name)、(free_capacity_gb)和(total_capacity_gb)。我的常识一般。我在RHEL 7上使用ansible 2.6。谢谢

我以前没有使用过loop_control，但试着使用谷歌的例子。不知道是怎么回事。

剧本代码：

 ---
 - hosts: localhost
   tasks:

   - name: Get Pools List
     shell: cinder get-pools --detail
     register: pools
   - debug:
       msg: "{{ item.total_capacity_gb }} - {{ item.free_capacity_gb }} - {{ item.pool_name }}"
     with_items: "{{ pools }}"
     loop_control:
       label: "loop control output : {{ item.total_capacity_gb }} | {{ item.free_capacity_gb }} | {{ item.pool_name }}"

ansible-剧本池-list.yml-语法-检查不返回任何错误。

运行剧本时出错：

致命: localhost: FAILED！=> { "msg"：“任务包含一个带有未定义变量的选项。错误是：'ansible.utils.unsafe_proxy.AnsibleUnsafeText对象‘没有属性’total_capacity_gb‘\n\n该错误似乎在’/home/user/pools list.yml‘中:第8行，第5列，但可能会在文件的其他地方，这取决于具体的语法问题。\n\n这个错误行看起来是：\n\n寄存器:池\n-调试：\n^这里\n“}

这是在上面的剧本中使用的命令模块的输出，无需调试：

 ---------------------------+------------------------------------------+",
"stdout_lines": [
    "+-----------------------------------+------------------------------------------+",
    "| Property                          | Value                                    |",
    "+-----------------------------------+------------------------------------------+",
    "| QoS_support                       | True                                     |",
    "| allocated_capacity_gb             | 0                                        |",
    "| easytier_support                  | True                                     |",
    "| free_capacity_gb                  | 0.0                                      |",
    "| location_info                     | xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:pool2   |",
    "| max_over_subscription_ratio       | 20.0                                     |",
    "| multiattach                       | True                                     |",
    "| name                              | abc86#pool2                              |",
    "| pool_name                         | pool2                                    |",
    "| provisioned_capacity_gb           | 0.0                                      |",
    "| reserved_percentage               | 0                                        |",
    "| total_capacity_gb                 | 0.0                                      |",
    "| volume_backend_name               | abc86                                    |",
    "+-----------------------------------+------------------------------------------+",
    "+-----------------------------------+------------------------------------------+",
    "| Property                          | Value                                    |",
    "+-----------------------------------+------------------------------------------+",
    "| QoS_support                       | True                                     |",
    "| allocated_capacity_gb             | 950                                      |",
    "| easytier_support                  | True                                     |",
    "| free_capacity_gb                  | 750.0                                    |",
    "| location_info                     | xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:pool3   |",
    "| max_over_subscription_ratio       | 20.0                                     |",
    "| multiattach                       | True                                     |",
    "| name                              | abc86#pool3                              |",
    "| pool_name                         | pool3                                    |",
    "| provisioned_capacity_gb           | 650.0                                    |",
    "| reserved_percentage               | 0                                        |",
    "| total_capacity_gb                 | 1000.0                                   |",
    "| volume_backend_name               | abc86                                    |",
    "+-----------------------------------+------------------------------------------+",

我需要从stdout调试(pool_name)、(free_capacity_gb)和(total_capacity_gb)每个池。

Answer 1

正如我正确地观察到的，ansible不自动解析命令的文本输出。

您将希望regex_replace提取您所关心的键值对，然后可以执行一些文本忍者操作，将它们转换为dict，同时利用yaml是如此自由的语法这一事实。

- debug:
    msg: >-
     {{ 
      pools.stdout_lines
      | select("regex", '[|] Property | '+the_pattern)
      | map("regex_replace", '^[|] Property.*', '- ')
      | map("regex_replace", the_pattern, '  "\1": "\2"')
      | join(newline_char)
      | from_yaml }}
  vars:
    newline_char: "\n"
    the_pattern: '[|] (free_capacity_gb|pool_name|total_capacity_gb) [|] ([^ ]+)'

您需要那个select来丢弃不匹配的行，否则regex_replace不会替换任何东西，最终会出现格式错误的YAML。