Return key/value 对 jq

Question

我有以下 json 输出（由 ansible 生成）和一个看似简单的任务，即用 jq 拉出一些 key/value 对。但是，我似乎无法获得我想要的输出。

{
"custom_stats": {}, 
"plays": [
    {
        "play": {
            "id": "001dd8b7-1cca-07c6-2280-00000000043a", 
            "name": "Ansible Ad-Hoc"
        }, 
        "tasks": [
            {
                "hosts": {
                    "hostname01-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname02-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname03-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname04-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname05-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname06-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname07-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname01-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname02-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname03-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname04-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname05-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname01-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname02-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname03-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname04-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname05-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname06-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }, 
                    "hostname07-con": {
                        "_ansible_no_log": false, 
                        "_ansible_verbose_always": true, 
                        "action": "debug", 
                        "changed": false, 
                        "hw_system_serial": "<SERIALNUMBER>"
                    }
                }, 
                "task": {
                    "id": "001dd8b7-1cca-07c6-2280-00000000043c", 
                    "name": "debug"
                }
            }
        ]
    }
], 
"stats": {
    "hostname01-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname02-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname03-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname04-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname05-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname06-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname07-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname01-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname02-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname03-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname04-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname05-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname01-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname02-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname03-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname04-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname05-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname06-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }, 
    "hostname07-con": {
        "changed": 0, 
        "failures": 0, 
        "ok": 1, 
        "skipped": 0, 
        "unreachable": 0
    }
}

}

基本上，我只希望在同一行返回最内层对象的键及其 hw_system_serial 的值。像这样：

hostname01-con: <SERIAL_NUMBER_1>
hostname02-con: <SERIAL_NUMBER_2>
etc

我觉得这应该是微不足道的（我本可以在这段时间写一些 ruby 或 python 脚本......），但我可能无法尝试正确的。我已经尝试了各种各样的事情，但我最终要么遍历每个序列号的主机列表，要么返回两个单独的列表（一个主机和一个序列号）。

例如，这个：

.plays[].tasks[].hosts | keys as $hosts | .[].hw_system_serial as $serial | $hosts | join(": ") + $serial

returns 单行中每个主机名的列表，后跟一个序列号。

我认为如果我可以将 $serial 转换为数组，它会起作用，但我尝试使用 split() 也失败了（例如 $serial | split("\r") returns 单项数组列表而不是项目数组）。

我在这里错过了什么？我觉得 jq 应该很容易处理这个（同样，任何带有 JSON 解析器的脚本语言......），但它不是完成这项工作的正确工具吗？

Answer 1

是的，这对 jq 工具是可行的：

jq -r '.plays[].tasks[].hosts | to_entries[] | "\(.key +": "+ .value.hw_system_serial)"' input.json

输出：

hostname01-con: <SERIALNUMBER>
hostname02-con: <SERIALNUMBER>
hostname03-con: <SERIALNUMBER>
hostname04-con: <SERIALNUMBER>
hostname05-con: <SERIALNUMBER>
hostname06-con: <SERIALNUMBER>
hostname07-con: <SERIALNUMBER>

Return key/value 对 jq

Return key/value pairs in jq

json

key-value

ansible

jq