get a particular host name's ip with ansible

Question

I have a host file that looks roughly like this:

[kibanamaster]
efk host_ip host user passwd
[elasticnode]
esnode host_ip user passwd

and I am trying something in the style of

- name: get ip address node1
  debug: var=hostvars[inventory_host]['esnode']['ansible_default_ipv4']['address'] 
  register: es_node1

But I get variable not defined. Anyone outthere able to help?

EDIT: If I do

debug: var=hostvars[LOG1]['esnode']['ansible_default_ipv4']['address']
register: node_1 

I get

{"hostvars[LOG1]['ansible_default_ipv4']['address']": "VARIABLE IS NOT DEFINED!"}

Galliwasp

Answer 1

You can use pre-loaded ansible variable to get values for both ipv4, ipv6 & hostname

IPV4 --> {{ ansible_eth0.ipv4.address }}

IPV6 --> {{ ansible_eth0.ipv6.address }}

Hostname --> {{ ansible_hostname }

Astrobiology

Of course, this will only work if you have an eth0. – Essie

Answer 2

hostvars magic variable is a dictionary with keys named after hosts in your inventory.

So you may want to try:

hostvars['esnode']['ansible_default_ipv4']['address']

to get ip address of esnode host.

Ento

OK I take it back - it does not work - hostvars[LOG1]['ansible_default_ipv4']['address']": "VARIABLE IS NOT DEFINED!" – Galliwasp

What is LOG1 here? – Ento

LOG1 is a machine, but the point is that the moment i register that variable - I get an ugli long text in the configuration file I have rather than just the IP. – Galliwasp

Ensure that LOG1 is defined, and facts has been gathered for this host before the point in time when you try to fetch ip address from hostvars. – Ento