How store output in variable while using the loop in ansible? - ansible

Question

I want to check the ip on the server where ip list i have in the json file as below,
cat /tmp/iplist.json
[
"10.10.10.182",
"182.10.10.2",
"192.168.200.2"
]
now the condition is only one ip exist on the system so i was executing the loop to store the only the success output in variable but i am not able to do that does any one knows how can i do this
here is my playbook
---
- name: Load values from json file
hosts: localhost
gather_facts: false
vars:
ip: "{{ lookup('file', '/tmp/iplist.json') | from_json }}"
tasks:
- name: Loop over imported iplist
shell: ip a | grep {{ item }}
loop: "{{ ip }}"
changed_when: true
register: echo
- debug:
msg: "{{ echo }}"
And this how it getting failed error
PLAY [Load values from json file] *************************************************************************************************************************
TASK [Loop over imported iplist] *******************************************************************************************************************************
changed: [localhost] => (item=10.10.10.182)
failed: [localhost] (item=182.10.10.2) => {"ansible_loop_var": "item", "changed": true, "cmd": "ip a | grep 182.10.10.2", "delta": "0:00:00.012178", "end": "2020-05-09 11:30:06.919913", "item": "182.10.10.2", "msg": "non-zero return code", "rc": 1, "start": "2020-05-09 11:30:06.907735", "stderr": "", "stderr_lines": [], "stdout": "", "stdout_lines": []}
failed: [localhost] (item=192.168.200.2) => {"ansible_loop_var": "item", "changed": true, "cmd": "ip a | grep 192.168.200.2", "delta": "0:00:00.029234", "end": "2020-05-09 11:30:07.178768", "item": "192.168.200.2", "msg": "non-zero return code", "rc": 1, "start": "2020-05-09 11:30:07.149534", "stderr": "", "stderr_lines": [], "stdout": "", "stdout_lines": []}
PLAY RECAP *****************************************************************************************************************************************************
localhost : ok=0 changed=0 unreachable=0 failed=1 skipped=0 rescued=0 ignored=0

Answer 1

When you enable gather_facts: true the variable ansible_all_ipv4_addresses will keep the list of all IPv4 addresses of the host. Use intersect to find common items. For example
- debug:
msg: "{{ ansible_all_ipv4_addresses | intersect(ip) }}"