Ansible search and query - ansible

Question

Updated with suggestions from larsks.
With the following structure
"intf_output_ios": {
"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",
"99",
"100"
],
"encapsulation": "dot1q"
}
},
{
"mode": "trunk",
"name": "GigabitEthernet0/2",
"trunk": {
"allowed_vlans": [
"10",
"20",
"30",
"99",
"100"
],
"encapsulation": "dot1q"
}
},
{
"access": {
"vlan": 30
},
"mode": "access",
"name": "GigabitEthernet0/3"
},
{
"name": "GigabitEthernet1/0"
},
{
"name": "GigabitEthernet1/1"
},
{
"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"
},
{
"access": {
"vlan": 99
},
"mode": "access",
"name": "GigabitEthernet3/3"
}
]
}
To print only the ports in VLAN 30 use the following?
- name: "P901T6: Set fact to include only access ports - IOS"
set_fact:
access_ports_ios_2: "{{ intf_output_ios | json_query(query) }}"
vars:
query: >-
gathered[?access.vlan==`30`]
- name: "P901T7: Dump list of access ports - IOS"
debug:
var=access_ports_ios_2
NOTE: It is important to use 30 (with backticks) and not '30'
I have gone through https://docs.ansible.com/ansible/latest/user_guide/playbooks_filters.html#managing-list-variables without really understanding how to fix this. If someone has some good link that would be very useful
With a structure like
ok: [access01] => {
"access_ports_ios": [
{
"access": {
"vlan": 30
},
"mode": "access",
"name": "GigabitEthernet0/3"
},
{
"access": {
"vlan": 99
},
"mode": "access",
"name": "GigabitEthernet3/3"
}
]
}
To get ports in vlan 30 use:
- debug:
var: access_ports_ios|json_query(query)
vars:
query: >-
[?access.vlan==`30`]
Note:
If you want to use a variable for vlan instead of hard-coding it. I had to do as follows:
- name: Debug 4
debug:
var: access_ports_ios|json_query('[?access.vlan==`{{ src_vlan | int}}`]')

Answer 1

You're asking for gathered.access, but gathered is a list and does not have an access attribute. You want "all items from gathered for which access.vlan is 30 (and note that the value of access.vlan is an integer, not a string):
- debug:
var: intf_output_ios|json_query(query)
vars:
query: >-
gathered[?access.vlan==`30`]
Which given you example input produces:
TASK [debug] *******************************************************************
ok: [localhost] => {
"intf_output_ios|json_query(query)": [
{
"access": {
"vlan": 30
},
"mode": "access",
"name": "GigabitEthernet0/3"
}
]
}
I'm going to reiterate advice I often give for json_query questions: use something like jpterm or the JMESPath website to test JMESPath expressions against your actual data. This makes it much easier to figure out where an expression might be going wrong.