无法在 ansible play 中读取 json 数据
Unable to read json data in ansible play
我有以下 json 数据文件:
[
{
"?xml": {
"attributes": {
"encoding": "UTF-8",
"version": "1.0"
}
}
},
{
"domain": [
{
"name": "mydom"
},
{
"domain-version": "12.2.1.3.0"
},
{
"server": [
{
"name": "AdminServer"
},
{
"ssl": {
"name": "AdminServer"
}
},
{
"listen-port": "12400"
},
{
"listen-address": "mydom.myserver1.mybank.com"
}
]
},
{
"server": [
{
"name": "SERV01"
},
{
"log": [
{
"name": "SERV01"
},
{
"file-name": "/web/bea_logs/domains/mydom/SERV01/SERV01.log"
}
]
},
{
"listen-port": "12401"
},
{
"listen-address": "mydom.myserver1.mybank.com"
},
{
"server-start": [
{
"java-vendor": "Sun"
},
{
"java-home": "/web/bea/platform1221/jdk"
}
]
}
]
},
{
"server": [
{
"name": "SERV02"
},
{
"log": [
{
"name": "SERV02"
},
{
"file-name": "/web/bea_logs/domains/mydom/SERV02/SERV02.log"
}
]
},
{
"listen-port": "12401"
},
{
"listen-address": "mydom.myhost2.mybank.com"
},
{
"server-start": [
{
"java-home": "/web/bea/platform1221/jdk"
} ]
}
]
}
]
}
]
我希望显示所有服务器名称及其各自的端口号。
下面是我尝试显示所有服务器名称的失败尝试
AdminServer
SERV01
SERV02
我的剧本:
tasks:
- name: Read the JSON file content in a variable
shell: "cat {{ playbook_dir }}/tmpfiles/{{ Latest_Build_Number }}/testme.json"
register: result
- name: Server Names
set_fact:
servernames: "{{ jsondata | json_query(jmesquery) }}"
vars:
jmesquery: '*.domain.server[*].name'
- name: Server Names and Ports
set_fact:
serverinfo: "{{ jsondata | json_query(jmesquery) }}"
vars:
jmesquery: '*.server[*].[name, port]'
- name: Print all server names
debug:
msg: "{{ item}}"
with_items:
- "{{ servernames }}"
我也尝试了以下方法:
jmesquery: 'domain.server[*].name'
没有错误,但输出中也没有数据。输出如下:
TASK [Print all server names] *********************************************************************************
Monday 21 February 2022 03:07:47 -0600 (0:00:00.129) 0:00:03.590 *******
ok: [localhost] => (item=) => {
"msg": ""
}
能否建议我如何获得所需的数据?
很多解决方案,一个
使用 jmespath,你可以试试这个:
tasks:
- name: Read the JSON file content in a variable
shell: "cat testme.json"
register: result
- name: jsondata
set_fact:
jsondata: "{{ result.stdout | from_json }}"
- name: Server Names
set_fact:
servernames: "{{ servernames | default([]) + [dict(name=item[0], port=item[1])] }}"
loop: "{{ jsondata | json_query(jmesquery0) | zip(jsondata | json_query(jmesquery1)) | list }}"
vars:
jmesquery0: '[].domain[].server[].name'
jmesquery1: '[].domain[].server[]."listen-port"'
- name: debug result
debug:
msg: "{{ servernames }}"
结果:
ok: [localhost] => {
"msg": [
{
"name": "AdminServer",
"port": "12400"
},
{
"name": "SERV01",
"port": "12401"
},
{
"name": "SERV02",
"port": "12401"
}
]
}
由于您的数据在列表中的性质,您将不得不求助于条件来摆脱空对象和单个项目列表,否则会污染您的数据:
[].domain[?server].server
,获取具有 属性 server
的对象
[?name].name | [0]
获取名字
[?"listen-port"]."listen-port" | [0]
获取端口
因此,对您的数据的有效 JMESPath 查询将是
[].domain[?server]
.server[]
.{
name: [?name].name | [0],
port: [?"listen-port"]."listen-port" | [0]
}
在 Ansible 中,使用单个 JMESPath 查询,假设文件在控制器上:
- debug:
var: >-
lookup(
'file',
playbook_dir ~ '/tmpfiles/' ~ Latest_Build_Number ~ '/testme.json'
)
| from_json
| json_query('
[].domain[?server]
.server[]
.{
name: [?name].name | [0],
port: [?"listen-port"]."listen-port" | [0]
}
')
vars:
Latest_Build_Number: 1
这会产生
TASK [debug] *************************************************************************
ok: [localhost] =>
? |-
lookup(
'file',
playbook_dir ~ '/tmpfiles/' ~ Latest_Build_Number ~ '/testme.json'
) | from_json | json_query('
[].domain[?server]
.server[]
.{
name: [?name].name | [0],
port: [?"listen-port"]."listen-port" | [0]
}
')
: - name: AdminServer
port: '12400'
- name: SERV01
port: '12401'
- name: SERV02
port: '12401'
如果文件在节点上而不是在控制器上,那么,您可以先 slurp
文件或求助于 cat
,就像您在应用相同的 JMESPath 查询之前所做的那样。
我有以下 json 数据文件:
[
{
"?xml": {
"attributes": {
"encoding": "UTF-8",
"version": "1.0"
}
}
},
{
"domain": [
{
"name": "mydom"
},
{
"domain-version": "12.2.1.3.0"
},
{
"server": [
{
"name": "AdminServer"
},
{
"ssl": {
"name": "AdminServer"
}
},
{
"listen-port": "12400"
},
{
"listen-address": "mydom.myserver1.mybank.com"
}
]
},
{
"server": [
{
"name": "SERV01"
},
{
"log": [
{
"name": "SERV01"
},
{
"file-name": "/web/bea_logs/domains/mydom/SERV01/SERV01.log"
}
]
},
{
"listen-port": "12401"
},
{
"listen-address": "mydom.myserver1.mybank.com"
},
{
"server-start": [
{
"java-vendor": "Sun"
},
{
"java-home": "/web/bea/platform1221/jdk"
}
]
}
]
},
{
"server": [
{
"name": "SERV02"
},
{
"log": [
{
"name": "SERV02"
},
{
"file-name": "/web/bea_logs/domains/mydom/SERV02/SERV02.log"
}
]
},
{
"listen-port": "12401"
},
{
"listen-address": "mydom.myhost2.mybank.com"
},
{
"server-start": [
{
"java-home": "/web/bea/platform1221/jdk"
} ]
}
]
}
]
}
]
我希望显示所有服务器名称及其各自的端口号。
下面是我尝试显示所有服务器名称的失败尝试
AdminServer
SERV01
SERV02
我的剧本:
tasks:
- name: Read the JSON file content in a variable
shell: "cat {{ playbook_dir }}/tmpfiles/{{ Latest_Build_Number }}/testme.json"
register: result
- name: Server Names
set_fact:
servernames: "{{ jsondata | json_query(jmesquery) }}"
vars:
jmesquery: '*.domain.server[*].name'
- name: Server Names and Ports
set_fact:
serverinfo: "{{ jsondata | json_query(jmesquery) }}"
vars:
jmesquery: '*.server[*].[name, port]'
- name: Print all server names
debug:
msg: "{{ item}}"
with_items:
- "{{ servernames }}"
我也尝试了以下方法:
jmesquery: 'domain.server[*].name'
没有错误,但输出中也没有数据。输出如下:
TASK [Print all server names] *********************************************************************************
Monday 21 February 2022 03:07:47 -0600 (0:00:00.129) 0:00:03.590 *******
ok: [localhost] => (item=) => {
"msg": ""
}
能否建议我如何获得所需的数据?
很多解决方案,一个 使用 jmespath,你可以试试这个:
tasks:
- name: Read the JSON file content in a variable
shell: "cat testme.json"
register: result
- name: jsondata
set_fact:
jsondata: "{{ result.stdout | from_json }}"
- name: Server Names
set_fact:
servernames: "{{ servernames | default([]) + [dict(name=item[0], port=item[1])] }}"
loop: "{{ jsondata | json_query(jmesquery0) | zip(jsondata | json_query(jmesquery1)) | list }}"
vars:
jmesquery0: '[].domain[].server[].name'
jmesquery1: '[].domain[].server[]."listen-port"'
- name: debug result
debug:
msg: "{{ servernames }}"
结果:
ok: [localhost] => {
"msg": [
{
"name": "AdminServer",
"port": "12400"
},
{
"name": "SERV01",
"port": "12401"
},
{
"name": "SERV02",
"port": "12401"
}
]
}
由于您的数据在列表中的性质,您将不得不求助于条件来摆脱空对象和单个项目列表,否则会污染您的数据:
[].domain[?server].server
,获取具有 属性server
的对象
[?name].name | [0]
获取名字[?"listen-port"]."listen-port" | [0]
获取端口
因此,对您的数据的有效 JMESPath 查询将是
[].domain[?server]
.server[]
.{
name: [?name].name | [0],
port: [?"listen-port"]."listen-port" | [0]
}
在 Ansible 中,使用单个 JMESPath 查询,假设文件在控制器上:
- debug:
var: >-
lookup(
'file',
playbook_dir ~ '/tmpfiles/' ~ Latest_Build_Number ~ '/testme.json'
)
| from_json
| json_query('
[].domain[?server]
.server[]
.{
name: [?name].name | [0],
port: [?"listen-port"]."listen-port" | [0]
}
')
vars:
Latest_Build_Number: 1
这会产生
TASK [debug] *************************************************************************
ok: [localhost] =>
? |-
lookup(
'file',
playbook_dir ~ '/tmpfiles/' ~ Latest_Build_Number ~ '/testme.json'
) | from_json | json_query('
[].domain[?server]
.server[]
.{
name: [?name].name | [0],
port: [?"listen-port"]."listen-port" | [0]
}
')
: - name: AdminServer
port: '12400'
- name: SERV01
port: '12401'
- name: SERV02
port: '12401'
如果文件在节点上而不是在控制器上,那么,您可以先 slurp
文件或求助于 cat
,就像您在应用相同的 JMESPath 查询之前所做的那样。