Get data from ping output in ansible - variables

Question

I can't extract the ip from the register var after ping command from "shell" module.
ping.yml
---
- name: "Ping computers"
shell:
cmd: "ping -c1 -w 2 {{ pinging_host }}"
register: pingged_host
ignore_errors: yes
with_items:
- 192.168.1.27
- 192.168.1.42
loop_control:
loop_var: pinging_host
- name: "Result ping"
debug:
var: pingged_host
- name: " ***Ip ping"
debug:
var: pingged_host.results.value.pinging_host
...
output from jenkins:
TASK [ Result ping] **********************
ok: [computer1] => {
"pingged_host": {
"changed": true,
"failed": true,
"msg": "All items completed",
"results": [
{
"ansible_loop_var": "pinging_host",
"changed": true,
"cmd": "ping -c1 -w 2 192.168.1.27",
"delta": "0:00:00.003363",
"end": "2021-02-25 17:08:48.994930",
"failed": false,
"invocation": {
"module_args": {
"_raw_params": "ping -c1 -w 2 192.168.1.27",
"_uses_shell": true,
"argv": null,
"chdir": null,
"creates": null,
"executable": null,
"removes": null,
"stdin": null,
"stdin_add_newline": true,
"strip_empty_ends": true,
"warn": true
}
},
"pinging_host": "192.168.1.27",
"rc": 0,
"start": "2021-02-25 17:08:48.991567",
"stderr": "",
"stderr_lines": [],
"stdout": "PING 192.168.1.27 (192.168.1.27) 56(84) bytes of data.\n64 bytes from 192.168.1.27: icmp_seq=1 ttl=128 time=0.337 ms\n\n--- 192.168.1.27 ping statistics ---\n1 packets transmitted, 1 received, 0% packet loss, time 0ms\nrtt min/avg/max/mdev = 0.337/0.337/0.337/0.000 ms",
"stdout_lines": [
"PING 192.168.1.27 (192.168.1.27) 56(84) bytes of data.",
"64 bytes from 192.168.1.27: icmp_seq=1 ttl=128 time=0.337 ms",
"",
"--- 192.168.1.27 ping statistics ---",
"1 packets transmitted, 1 received, 0% packet loss, time 0ms",
"rtt min/avg/max/mdev = 0.337/0.337/0.337/0.000 ms"
]
},
{
"ansible_loop_var": "pinging_host",
"changed": true,
"cmd": "ping -c1 -w 2 192.168.1.42",
"delta": "0:00:02.003313",
"end": "2021-02-25 17:08:51.269047",
"failed": true,
"invocation": {
"module_args": {
"_raw_params": "ping -c1 -w 2 192.168.1.42",
"_uses_shell": true,
"argv": null,
"chdir": null,
"creates": null,
"executable": null,
"removes": null,
"stdin": null,
"stdin_add_newline": true,
"strip_empty_ends": true,
"warn": true
}
},
"msg": "non-zero return code",
"pinging_host": "192.168.1.42",
"rc": 1,
"start": "2021-02-25 17:08:49.265734",
"stderr": "",
"stderr_lines": [],
"stdout": "PING 192.168.1.42 (192.168.1.42) 56(84) bytes of data.\n\n--- 192.168.1.42 ping statistics ---\n2 packets transmitted, 0 received, 100% packet loss, time 10ms",
"stdout_lines": [
"PING 192.168.1.42 (192.168.1.42) 56(84) bytes of data.",
"",
"--- 192.168.1.42 ping statistics ---",
"2 packets transmitted, 0 received, 100% packet loss, time 10ms"
]
}
]
}
}
TASK [ ***Result ping] *******************
ok: [computer1] => {
"pingged_host.results.value.pinging_host": "VARIABLE IS NOT DEFINED!"
}
Nota: "VARIABLE IS NOT DEFINED!" or "...template error while templating string: expected name...", I have this result when I put other path's:
pingged_host.results.value.pinging_host
pingged_host.results.pinging_host
pingged_host.results.[pinging_host]
pingged_host.results[pinging_host]
pingged_host.results['pinging_host']
How I can read "pinging_host" or "rc" from my register var???????
Thank's

Answer 1

Your data structure in yaml looks like this
pingged_host:
results:
- pinging_host: 192.168.1.27
rc: 0
- pinging_host: 192.168.1.42
rc: 0
Since result contains an array, you have to reference exact element of the array.
i.e to get first result you should use
- name: " {{ role_name }} | ***Ip ping"
debug:
var: pingged_host.results[0].pinging_host
To get every attribute you can use map and list filters, as explained here https://ansiblemaster.wordpress.com/2017/02/24/debug-properly-data-registered-with-a-loop/ , if you want to get all rc's, you can use the following:
- name: " {{ role_name }} | ***Ip ping"
debug:
msg: "{{ pingged_host.results|map(attribute='rc')|list }}"
resulting in:
TASK [{{ role_name }} | ***Ip ping] **********************************************************************************************************************************************
ok: [localhost] => {
"msg": [
0,
0
]
}