如何使用 Jmespath 过滤以相似的字符串键开头的多个键名称?

Question

我有以下 json，我想从中过滤所有 mac 地址，从键macaddress_开始使用 jmespath 如何实现这一点？

{
"facts_hash": {
"macaddress_em1": "44:a8:42:27:c7:ba",
"netmask_em1": "255.255.255.0",
"mtu_em1": "1500",
"macaddress_em2": "44:a8:42:27:c7:bb",
"mtu_em2": "1500",
"macaddress_em3": "44:a8:42:27:c7:bc",
"mtu_em3": "1500",
"macaddress_em4": "44:a8:42:27:c7:bd",
"mtu_em4": "1500",
}
}

谢谢

Answer 1

可以选择匹配的键并提取值，而不是json_query。例如

- debug:
msg: "{{ my_keys|
map('extract', facts_hash)|
list }}"
vars:
my_keys: "{{ facts_hash.keys()|
select('match', '^macaddress_(.*)$')|
list }}"

给

"msg": [
"44:a8:42:27:c7:ba",
"44:a8:42:27:c7:bb",
"44:a8:42:27:c7:bc",
"44:a8:42:27:c7:bd"
]