在查询中使用 Ansible JMESPath
Usage of Ansible JMESPath in queries
我正在使用以下 JSON 文件:
sample.json:
{
"lldp_output['gathered']": [
{
"mode": "trunk",
"name": "GigabitEthernet0/0",
"trunk": {
"encapsulation": "dot1q"
}
},
{
"access": {
"vlan": 12
},
"mode": "access",
"name": "GigabitEthernet0/1"
},
{
"name": "GigabitEthernet0/2"
}
]
}
剧本:
---
- hosts: localhost
gather_facts: no
vars:
tmpdata: "{{ lookup('file','sample.json') | from_json }}"
tasks:
- name: Take 4
debug:
msg: "{{ tmpdata | community.general.json_query(lldp_output['gathered']) }}"
我收到以下错误:
TASK [Take 4] ********************************************************************************************
task path: /root/scripts/atest.yml:18
fatal: [localhost]: FAILED! => {
"msg": "Error in jmespath.search in json_query filter plugin:\n'lldp_output' is undefined"
}
如何查询显示的 JSON 以便获得具有 mode: trunk
的所有端口的列表
当我 运行 在剧本中时:
---
- name: Find trunk ports
hosts: ios
tasks:
- name: Collect interface output
cisco.ios.ios_l2_interfaces:
config:
state: gathered
register:
"intf_output"
- debug:
var=intf_output
- name: Take 4
debug:
msg: "{{ intf_output | json_query(query) }}"
vars:
query: >-
"lldp_output['gathered']"[?mode=='trunk']
返回的结构如下:
{
"intf_output": {
"ansible_facts": {
"discovered_interpreter_python": "/usr/bin/python3"
},
"changed": false,
"failed": false,
"gathered": [
{
"name": "GigabitEthernet0/0"
},
{
"mode": "trunk",
"name": "GigabitEthernet0/1",
"trunk": {
"allowed_vlans": [
"10",
"20",
"30",
"100"
],
"encapsulation": "dot1q"
}
},
{
"mode": "trunk",
"name": "GigabitEthernet0/2",
"trunk": {
"allowed_vlans": [
"10",
"20",
"30",
"100"
],
"encapsulation": "dot1q"
}
},
{
"mode": "trunk",
"name": "GigabitEthernet0/3",
"trunk": {
"allowed_vlans": [
"10",
"20",
"30",
"100"
],
"encapsulation": "dot1q"
}
},
{
"mode": "trunk",
"name": "GigabitEthernet1/0",
"trunk": {
"allowed_vlans": [
"10",
"20",
"30",
"100"
],
"encapsulation": "dot1q"
}
},
{
"mode": "trunk",
"name": "GigabitEthernet1/1",
"trunk": {
"allowed_vlans": [
"10",
"20",
"30",
"100"
],
"encapsulation": "dot1q"
}
},
{
"name": "GigabitEthernet1/2"
},
{
"name": "GigabitEthernet1/3"
},
{
"name": "GigabitEthernet2/0"
},
{
"name": "GigabitEthernet2/1"
},
{
"name": "GigabitEthernet2/2"
},
{
"name": "GigabitEthernet2/3"
},
{
"name": "GigabitEthernet3/0"
},
{
"name": "GigabitEthernet3/1"
},
{
"name": "GigabitEthernet3/2"
},
{
"name": "GigabitEthernet3/3"
}
]
}
}
对于每个主机,我 运行 反对剧本。
json_query
的参数必须是字符串。因为你没有引用你的论点,Ansible 正在寻找一个名为 lldp_output
的变量。但是你有额外的问题,因为你试图访问一个名为 lldp_output['gathered']
的键,但是 [
在 JSON (和 JMESPath 查询)中是一个语法上重要的字符,所以需要也要逃脱。
为了避免各种引用转义扭曲,我们可以将查询本身放入一个变量中,这样我们就有:
- hosts: localhost
vars:
tmpdata: "{{ lookup('file','sample.json') | from_json }}"
tasks:
- name: Take 4
debug:
msg: "{{ tmpdata | json_query(query) }}"
vars:
query: >-
"lldp_output['gathered']"
请注意,我们使用的是 >-
块引号运算符,这意味着 query
的值是文字字符串 "lldp_output['gathered']"
,包括外部引号。
剧本输出:
TASK [Take 4] *********************************************************************************
ok: [localhost] => {
"msg": [
{
"mode": "trunk",
"name": "GigabitEthernet0/0",
"trunk": {
"encapsulation": "dot1q"
}
},
{
"access": {
"vlan": 12
},
"mode": "access",
"name": "GigabitEthernet0/1"
},
{
"name": "GigabitEthernet0/2"
}
]
}
要获得 mode
等于 trunk
的那些系统,只需添加
您的查询条件:
- hosts: localhost
vars:
tmpdata: "{{ lookup('file','sample.json') | from_json }}"
tasks:
- name: Take 4
debug:
msg: "{{ tmpdata | json_query(query) }}"
vars:
query: >-
"lldp_output['gathered']"[?mode=='trunk']
这将输出:
TASK [Take 4] *********************************************************************************
ok: [localhost] => {
"msg": [
{
"mode": "trunk",
"name": "GigabitEthernet0/0",
"trunk": {
"encapsulation": "dot1q"
}
}
]
}
更新
鉴于您在更新后的问题中显示的数据,事情很多
更简单,因为你没有你在
原来的问题。使用如图所示定义的 intf_output
,您可以
写:
tasks:
- name: Take 4
debug:
msg: "{{ intf_output | json_query(query) }}"
vars:
query: >-
gathered[?mode=='trunk']
我正在使用以下 JSON 文件:
sample.json:
{
"lldp_output['gathered']": [
{
"mode": "trunk",
"name": "GigabitEthernet0/0",
"trunk": {
"encapsulation": "dot1q"
}
},
{
"access": {
"vlan": 12
},
"mode": "access",
"name": "GigabitEthernet0/1"
},
{
"name": "GigabitEthernet0/2"
}
]
}
剧本:
---
- hosts: localhost
gather_facts: no
vars:
tmpdata: "{{ lookup('file','sample.json') | from_json }}"
tasks:
- name: Take 4
debug:
msg: "{{ tmpdata | community.general.json_query(lldp_output['gathered']) }}"
我收到以下错误:
TASK [Take 4] ********************************************************************************************
task path: /root/scripts/atest.yml:18
fatal: [localhost]: FAILED! => {
"msg": "Error in jmespath.search in json_query filter plugin:\n'lldp_output' is undefined"
}
如何查询显示的 JSON 以便获得具有 mode: trunk
当我 运行 在剧本中时:
---
- name: Find trunk ports
hosts: ios
tasks:
- name: Collect interface output
cisco.ios.ios_l2_interfaces:
config:
state: gathered
register:
"intf_output"
- debug:
var=intf_output
- name: Take 4
debug:
msg: "{{ intf_output | json_query(query) }}"
vars:
query: >-
"lldp_output['gathered']"[?mode=='trunk']
返回的结构如下:
{
"intf_output": {
"ansible_facts": {
"discovered_interpreter_python": "/usr/bin/python3"
},
"changed": false,
"failed": false,
"gathered": [
{
"name": "GigabitEthernet0/0"
},
{
"mode": "trunk",
"name": "GigabitEthernet0/1",
"trunk": {
"allowed_vlans": [
"10",
"20",
"30",
"100"
],
"encapsulation": "dot1q"
}
},
{
"mode": "trunk",
"name": "GigabitEthernet0/2",
"trunk": {
"allowed_vlans": [
"10",
"20",
"30",
"100"
],
"encapsulation": "dot1q"
}
},
{
"mode": "trunk",
"name": "GigabitEthernet0/3",
"trunk": {
"allowed_vlans": [
"10",
"20",
"30",
"100"
],
"encapsulation": "dot1q"
}
},
{
"mode": "trunk",
"name": "GigabitEthernet1/0",
"trunk": {
"allowed_vlans": [
"10",
"20",
"30",
"100"
],
"encapsulation": "dot1q"
}
},
{
"mode": "trunk",
"name": "GigabitEthernet1/1",
"trunk": {
"allowed_vlans": [
"10",
"20",
"30",
"100"
],
"encapsulation": "dot1q"
}
},
{
"name": "GigabitEthernet1/2"
},
{
"name": "GigabitEthernet1/3"
},
{
"name": "GigabitEthernet2/0"
},
{
"name": "GigabitEthernet2/1"
},
{
"name": "GigabitEthernet2/2"
},
{
"name": "GigabitEthernet2/3"
},
{
"name": "GigabitEthernet3/0"
},
{
"name": "GigabitEthernet3/1"
},
{
"name": "GigabitEthernet3/2"
},
{
"name": "GigabitEthernet3/3"
}
]
}
}
对于每个主机,我 运行 反对剧本。
json_query
的参数必须是字符串。因为你没有引用你的论点,Ansible 正在寻找一个名为 lldp_output
的变量。但是你有额外的问题,因为你试图访问一个名为 lldp_output['gathered']
的键,但是 [
在 JSON (和 JMESPath 查询)中是一个语法上重要的字符,所以需要也要逃脱。
为了避免各种引用转义扭曲,我们可以将查询本身放入一个变量中,这样我们就有:
- hosts: localhost
vars:
tmpdata: "{{ lookup('file','sample.json') | from_json }}"
tasks:
- name: Take 4
debug:
msg: "{{ tmpdata | json_query(query) }}"
vars:
query: >-
"lldp_output['gathered']"
请注意,我们使用的是 >-
块引号运算符,这意味着 query
的值是文字字符串 "lldp_output['gathered']"
,包括外部引号。
剧本输出:
TASK [Take 4] *********************************************************************************
ok: [localhost] => {
"msg": [
{
"mode": "trunk",
"name": "GigabitEthernet0/0",
"trunk": {
"encapsulation": "dot1q"
}
},
{
"access": {
"vlan": 12
},
"mode": "access",
"name": "GigabitEthernet0/1"
},
{
"name": "GigabitEthernet0/2"
}
]
}
要获得 mode
等于 trunk
的那些系统,只需添加
您的查询条件:
- hosts: localhost
vars:
tmpdata: "{{ lookup('file','sample.json') | from_json }}"
tasks:
- name: Take 4
debug:
msg: "{{ tmpdata | json_query(query) }}"
vars:
query: >-
"lldp_output['gathered']"[?mode=='trunk']
这将输出:
TASK [Take 4] *********************************************************************************
ok: [localhost] => {
"msg": [
{
"mode": "trunk",
"name": "GigabitEthernet0/0",
"trunk": {
"encapsulation": "dot1q"
}
}
]
}
更新
鉴于您在更新后的问题中显示的数据,事情很多
更简单,因为你没有你在
原来的问题。使用如图所示定义的 intf_output
,您可以
写:
tasks:
- name: Take 4
debug:
msg: "{{ intf_output | json_query(query) }}"
vars:
query: >-
gathered[?mode=='trunk']