CODEWITHSUNDEEP
ansible
Herry
Herry

Reputation: 79

How can I store the full host name as variable in ansible?

I need to use one out of two hosts as a variable. I do have inventory_hostname_short of both but I need a full host as a variable. Currently, for testing I am using a hardcoded value. My playbook will run on both hosts at the same time so how can I identify and store the full hostname as a variable?

host_1_full = 123.abc.de.com

host_2_full = 345.abc.de.com

Above both are hosts and I do have

---
- name: Ansible Script 
  hosts: all
  
  vars:
    host1_short : '123'
    host2_short : '345'

  tasks:
    - name: set host
      set_fact:
        host1_full: "{{inventory_hostname}}"
      when: inventory_hostname_short == host1_short

    - name: print info
      debug:
        msg: "host - {{host1_full}}"

    - name: block1
      block:
      - name:running PS1 file
        win_shell: "script.ps1"
        register: host1_output
      
      when: inventory_hostname_short == host1_short  
      

    - name: block2
      block:
      
      - name: set host
        set_fact:
          IN_PARA: "{{ hostvars[host1_full]['host1_output']['stdout']}}"

      - name:running PS1 file
        win_shell: "main.ps1 -paramater {{ IN_PARA }}"
        register: output

   
      when: inventory_hostname_short == host2_short

SO to access any file from different host requires full hostname. How can I get that full host name?

Upvotes: 2

Views: 18990

Answers (2)

Zeitounator
Zeitounator

Reputation: 44595

Given the following inventories/test_inventory.yml

---
all:
  hosts:
    123.abc.de.com:
    345.abc.de.com:

ansible will provide the needed result in inventory_hostname automagically as demonstrated by the following test.yml playbook

---
- name: Print long and short inventory name
  hosts: all
  gather_facts: false

  tasks:
    - name: print info
      ansible.builtin.debug:
        msg: "Host full name is {{ inventory_hostname }}. Short name is {{ inventory_hostname_short }}"

which gives:

$ ansible-playbook -i inventories/test_inventory.yml test.yml 

PLAY [print long and short inventory name] *********************************************************************************************************************************************************************************************

TASK [print info] **********************************************************************************************************************************************************************************************************************
ok: [345.abc.de.com] => {
    "msg": "Host full name is 345.abc.de.com. Short name is 345"
}
ok: [123.abc.de.com] => {
    "msg": "Host full name is 123.abc.de.com. Short name is 123"
}

PLAY RECAP *****************************************************************************************************************************************************************************************************************************
123.abc.de.com             : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
345.abc.de.com             : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

Upvotes: 4

seshadri_c
seshadri_c

Reputation: 7340

As already suggested, the ansible_hostname and ansible_fqdn are automatic facts about hosts in your inventory. However, your requirement is a little unique. So we might have to apply a unique method to accomplish this. How about something like this?

Consider example inventory as below:

---
all:
  hosts:
    192.168.1.101:      # 123.abc.de.com
    192.168.1.102:      # 345.abc.de.com

We can have a play like this:

- hosts: all
  vars:
    host1_short: 123
    host2_short: 345

  tasks:
  - command: "hostname -f"
    register: result

  - block:
    - set_fact:
        host1_full: "{{ result.stdout }}"
    - debug:
        msg: "Host1 fullname: {{ host1_full }}"
    when: host1_short in result.stdout

Upvotes: 0

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