Ansible 剧本 json_query答案

【问题标题】：Ansible playbook json_queryAnsible 剧本 json_query
【发布时间】：2020-05-08 16:41:45
【问题描述】：

加载以下 Ansible 本地事实后：

    {
    "cdbs": {
        "e01ca601": {
            "char_set": "AL32UTF8",
            "home": "/u01/dbhome_1",
            "npdbs": "1",
            "pdbs": "pdb1"
        },
        "e01ca602": {
            "char_set": "WE8ISO8859P1",
            "home": "/u01/dbhome_2",
            "npdbs": "0",
            "pdbs": ""
        },
        "e01ca603": {
            "char_set": "AL32UTF8",
            "home": "/u01/dbhome_3",
            "npdbs": "0",
            "pdbs": ""
        },
        "e01ca604": {
            "char_set": "WE8ISO8859P1",
            "home": "/u01/dbhome_1",
            "npdbs": "0",
            "pdbs": ""
        },
        "e01ca605": {
            "char_set": "AL32UTF8",
            "home": "/u01/dbhome_2",
            "npdbs": "0",
            "pdbs": ""
        },
        "e01ca900": {
            "char_set": "WE8ISO8859P1",
            "home": "/u01/dbhome_3",
            "npdbs": "1",
            "pdbs": "pdb2"
        }
    },
    "pdbs": {
        "pdb1": {
            "cdb": "e01ca601",
            "creation_time": "2020-01-21 14:10:39"
        },
        "pdb2": {
            "cdb": "e01ca900",
            "creation_time": "2020-01-13 13:34:21"
        }
    }
}

我想在过滤器中使用它们以仅选择例如cdbs.*.char_set == 'AL32UTF8'，但无法弄清楚如何在任务中添加过滤条件：

- name: "Task1"
  vars:
    myquery : '[cdbs.*.char_set][0]'
  debug:
    msg:
      - "Query condition: {{ myquery }}"
      - "Query filter   : {{ ansible_local | json_query(myquery) }}"

除此之外，是否可以获得项目名称列表，即 e01ca605 等？

任何帮助将不胜感激！

问候，德克

【问题讨论】：

标签： ansible json-query

【解决方案1】：

我得到了这个（使用管道）工作：

- name: "Task4"
  vars:
    myquery: cdbs.* | [?char_set=='AL32UTF8']
  debug:
    msg:
      - "{{ item }}"
  with_items: "{{ ansible_local | json_query(myquery)  }}"

【讨论】：

【解决方案2】：

问：选择 cdbs.*.char_set == 'AL32UTF8'

A：下面的任务

    - set_fact:
        sel_AL32UTF8: "{{ cdbs|json_query(myquery) }}"
      vars:
        myquery: "*|[?char_set=='AL32UTF8']"
    - debug:
        var: sel_AL32UTF8

给

   "sel_AL32UTF8": [
        {
            "char_set": "AL32UTF8", 
            "home": "/u01/dbhome_3", 
            "npdbs": "0", 
            "pdbs": ""
        }, 
        {
            "char_set": "AL32UTF8", 
            "home": "/u01/dbhome_1", 
            "npdbs": "1", 
            "pdbs": "pdb1"
        }, 
        {
            "char_set": "AL32UTF8", 
            "home": "/u01/dbhome_2", 
            "npdbs": "0", 
            "pdbs": ""
        }
    ]

问：获取名称列表。

答：应用keys() 方法。例如

    - set_fact:
        cdbs_keys: "{{ cdbs.keys()|list }}"
    - debug:
        var: cdbs_keys

给

    "cdbs_keys": [
        "e01ca900", 
        "e01ca602", 
        "e01ca603", 
        "e01ca601", 
        "e01ca604", 
        "e01ca605"
    ]

【讨论】：

你好弗拉基米尔，你提出的任务工作得很好！与此同时，我也得到了这个（使用管道）工作：-名称：“Task4”vars：myquery：cdbs。* | [?char_set=='AL32UTF8'] debug: msg: - "{{ item }}" with_items: "{{ ansible_local | json_query(myquery) }}" 但是，是否可以获得项目名称列表，即e01ca605等？干杯，德克
你好，德克。当然，我已经更新了答案。干杯，弗拉基米尔。
你好弗拉基米尔，谢谢这也很好。这个想法是将这两者结合起来：获取过滤条件的键列表。你也有解决方案吗？谢谢和欢呼，德克
在答案部分添加了此问题的解决方案

【解决方案3】：

最后，结合弗拉基米尔的回复找到的解决方案是：

    - name: "Task10"
  vars:
    myquery: "[?value.char_set=='AL32UTF8']"
  debug: var=item.key
  with_items: "{{ ansible_local.cdbs|dict2items|json_query(myquery) }}"

生成项目列表

ok: [exa101vm01] => (item={'key': u'e01ca900', 'value': {u'home': u'/u01/dbhome_1', u'npdbs': u'1', u'char_set': u'AL32UTF8', u'pdbs': u'pdb1', u'archivelog_mode': u'NOARCHIVELOG'}}) => {
"ansible_loop_var": "item",
"item": {
    "key": "e01ca900",
    "value": {
        "archivelog_mode": "NOARCHIVELOG",
        "char_set": "AL32UTF8",
        "home": "/u01/dbhome_1",
        "npdbs": "1",
        "pdbs": "pdb1"
    }
},
"item.key": "e01ca900"
} 
... (cut here)

语法和可能性似乎非常强大，但很难调试 ;-)

感谢您的帮助！

干杯，德克

【讨论】：