Re: Jinja2 template error with for loops using fac...

Manjiri_28

I am getting following error while executing playbook to create /etc/hosts like file using jinja2 template. For loop with fact variables are used in templates

An exception occurred during task execution. To see the full traceback, use -vvv. The error was: ansible.errors.AnsibleUndefinedVariable: 'dict object' has no attribute 'default_ipv4'. 'dict object' has no attribute 'default_ipv4'
fatal: [node1]: FAILED! => {"changed": false, "msg": "AnsibleUndefinedVariable: 'dict object' has no attribute 'default_ipv4'. 'dict object' has no attribute 'default_ipv4'"}

ARoumiantsev

More info, please. Inventory, playbook may be source of issue

Manjiri_28

Fact variables are working in playbook.

But not in for loop in templates

The template is as follows

{% for i in groups['all'] %}
{{ hostvars[i]['ansible_facts']['default_ipv4']['address'] }} {{ hostvars[i]['ansible_facts']['fqdn'] }} {{ hostvars[i]['ansible_facts']['hostname'] }}
{% endfor %}

and Playbook is

---
- name: Create hosts file on all managed hosts
hosts: dev
tasks:
- name: Generate /etc/myhosts file using template
ansible.builtin.template:
src: hosts.j2
dest: /etc/myhosts

Manjiri_28

ARoumiantsev

Correct your template, please:

{% for i in groups['all'] %}
{{ hostvars[i]['ansible_facts']['ansible_default_ipv4']['address'] }} {{ hostvars[i]['ansible_facts']['fqdn'] }} {{ hostvars[i]['ansible_facts']['hostname'] }}
{% endfor %}

Good luck

Manjiri_28

I tried with this also

It also didnt work

ARoumiantsev

More info, please.

ARoumiantsev

Hi @Manjiri_28

I have reproduce same behaivor of your playbook here. May be it gives you idea to solve your issue. Put attantion to inventory and routing setting at node2 outside of dev group.

Good luck

[student@workstation a]$ ansible -m setup -a "filter=ansible_default_ipv4" dev
node1 | SUCCESS => {
"ansible_facts": {
"ansible_default_ipv4": {
"address": "172.25.250.9",
"alias": "eth0",
"broadcast": "172.25.250.255",
"gateway": "172.25.250.254",
"interface": "eth0",
"macaddress": "52:54:00:00:fa:09",
"mtu": 1500,
"netmask": "255.255.255.0",
"network": "172.25.250.0",
"type": "ether"
},
"discovered_interpreter_python": "/usr/libexec/platform-python"
},
"changed": false
}
[student@workstation a]$ ansible-playbook test.yml

PLAY [Create hosts file] *******************************************************

TASK [Gathering Facts] *********************************************************
ok: [node1]

TASK [generate hosts] **********************************************************
fatal: [node1]: FAILED! => {"changed": false, "msg": "AnsibleUndefinedVariable: 'dict object' has no attribute 'default_ipv4'"}

PLAY RECAP *********************************************************************
node1 : ok=1 changed=0 unreachable=0 failed=1 skipped=0 rescued=0 ignored=0

[student@workstation a]$ cat inventory
node2
[dev]
node1
[student@workstation a]$ ssh student@node2 ip route
172.25.249.0/24 dev eth1 proto kernel scope link src 172.25.249.10 metric 101
172.25.250.0/24 dev eth0 proto kernel scope link src 172.25.250.10 metric 100

Chetan_Tiwary_

@Manjiri_28 Is your host reachable ? Are you gathering facts for all of your hosts ?

Manjiri_28

yes

Jinja2 template error with for loops using fact variables

Ansible