如何使用 jq 遍历 Nagios JSON

Question

我想弄清楚如何解析以下 JSON 而不必在多个命令中显式指示数组索引。我只需要在一行中将主机组与所有主机信息相关联。

{
  "data": {
    "selectors": {
    },
    "hostgroups": [
      {
        "name": "ATL",
        "hosts": [
          {
            "name": "ATL-SERVER1",
            "time_up": 2496629,
            "time_down": 8970,
            "time_unreachable": 0,
            "scheduled_time_up": 0,
            "scheduled_time_down": 0,
            "scheduled_time_unreachable": 0,
            "time_indeterminate_nodata": 0,
            "time_indeterminate_notrunning": 0
          },
          {
            "name": "ATL-SERVER2",
            "time_up": 2505525,
            "time_down": 74,
            "time_unreachable": 0,
            "scheduled_time_up": 0,
            "scheduled_time_down": 0,
            "scheduled_time_unreachable": 0,
            "time_indeterminate_nodata": 0,
            "time_indeterminate_notrunning": 0
          }
        ]
      },
      {
        "name": "LAX",
        "hosts": [
          {
            "name": "LAX-SERVER1",
            "time_up": 2505599,
            "time_down": 0,
            "time_unreachable": 0,
            "scheduled_time_up": 0,
            "scheduled_time_down": 0,
            "scheduled_time_unreachable": 0,
            "time_indeterminate_nodata": 0,
            "time_indeterminate_notrunning": 0
          },
          {
            "name": "LAX-SERVER2",
            "time_up": 2505599,
            "time_down": 0,
            "time_unreachable": 0,
            "scheduled_time_up": 0,
            "scheduled_time_down": 0,
            "scheduled_time_unreachable": 0,
            "time_indeterminate_nodata": 0,
            "time_indeterminate_notrunning": 0
          }
        ]
      }
    ]
  }
}

以下命令会得到我需要的东西：

.data.hostgroups[0].name as $Group | {$Group} + .data.hostgroups[0].hosts[] | [.Group, .name, .time_up, .time_down, .time_unreachable, .scheduled_time_up, .scheduled_time_down, .scheduled_time_unreachable, .time_indeterminate_nodata, .time_indeterminate_notrunning] | @csv
.data.hostgroups[1].name as $Group | {$Group} + .data.hostgroups[1].hosts[] | [.Group, .name, .time_up, .time_down, .time_unreachable, .scheduled_time_up, .scheduled_time_down, .scheduled_time_unreachable, .time_indeterminate_nodata, .time_indeterminate_notrunning] | @csv

但我一直在试图弄清楚如何在一行中做到这一点。我有 20 个主机组，所以我的脚本中有 20 个命令。

我发现的所有可比示例似乎都适用于仅从数组中拉出一个字段（在我的示例中是 host[]）。例如，这可以正常工作：

map(.data.hostgroups | map({Group: .name, Host: .hosts[].name} | [.Group, .Host])) | add[] | @csv

输出为：

"ATL","ATL-SERVER1"
"ATL","ATL-SERVER2"
"LAX","LAX-SERVER1"
"LAX","LAX-SERVER2"

但是当我添加一个附加字段时，例如：

map(.data.hostgroups | map({Group: .name, Host: .hosts[].name, Uptime: .hosts[].time_up} | [.Group, .Host, .Uptime])) | add[] | @csv

输出为：

"ATL","ATL-SERVER1",2496629
"ATL","ATL-SERVER1",2505525
"ATL","ATL-SERVER2",2496629
"ATL","ATL-SERVER2",2505525
"LAX","LAX-SERVER1",2505599
"LAX","LAX-SERVER1",2505599
"LAX","LAX-SERVER2",2505599
"LAX","LAX-SERVER2",2505599

对于我添加的每个字段，基本上都是将它们相乘。而且我很确定我理解为什么会这样，但我仍在尝试弄清楚如何在避免以指数方式合并结果的问题的同时将其连成一行。

谁能帮帮我？

谢谢！

Answer 1

$ cat extract.jq
.data.hostgroups[]
| .name as $Group
| .hosts[]
| [$Group, .name, .time_up, .time_down, .time_unreachable,
   .scheduled_time_up, .scheduled_time_down, 
   .scheduled_time_unreachable, .time_indeterminate_nodata, 
   .time_indeterminate_notrunning]
| @csv


$ jq -r -f extract.jq in.json
"ATL","ATL-SERVER1",2496629,8970,0,0,0,0,0,0
"ATL","ATL-SERVER2",2505525,74,0,0,0,0,0,0
"LAX","LAX-SERVER1",2505599,0,0,0,0,0,0,0
"LAX","LAX-SERVER2",2505599,0,0,0,0,0,0,0

如何使用 jq 遍历 Nagios JSON

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