Hostvars to pull specific variables

[Jeffrey Agnitsch]

Hello,

I am trying to use hostvars to get an inventory hostname and a specific variable. The goal of this is to get from the app group, get each unique servers client_name. The below command works for just the first line as I am fairly confident the 0 means first item in the inventory file.

I need to get it to be a per line item of the inventory file so that each servers client name is read out. I have tried a couple variations but I can't seem to get this correct. Can anyone provide any insight as to what I might be doing wrong.

"{{ hostvars[groups['apps'][0]]['client_name'] }}"

inventory file

[apps]

server1 instance_user=fondinst client_name=fondprd1 server_ip=

server2 instance_user=kumcinst client_name=kumcprd1 `server_ip=

[proxy]

proxy1

Playbook

* hosts: 127.0.0.1

  connection: local

  gather_facts: no

* hosts: app

  tasks:

  

  * name: debug

    debug: msg={{ client_name }}

* hosts: proxy

  tasks:

  

  * name: debug

    debug: msg="{{ hostvars[groups['apps'][0]]['client_name'] }}"

    Summary

    Correct syntax for hostvars calling from a certain group, for an inventory_hostname name, getting a variable

    Linux Rhel6

Ansible version 2.4.4.4

component name:

Ansible

[Kai Stian Olstad]

You need to loop over groups['apps'] with with_items.

- debug: msg="{{ item['client_name'] }}"
with_items: "{{ groups['apps'] }}"



--
Kai Stian Olstad

[Jeffrey Agnitsch]

When running the command it stated there was an undefined variable  I made the below changes to the playbook

=> {"msg": "The task includes an option with an undefined variable. The error was: 'ansible.utils.unsafe_proxy.AnsibleUnsafeText object' has no attribute 'client_name'\n\nThe error appears to have been in '/etc/ansible/testing/prod_inov2.yml'

 

inventory file

[apps]

server1 instance_user=fondinst client_name=fondprd1 server_ip=

server2 instance_user=kumcinst client_name=kumcprd1 `server_ip=

[proxy]

proxy1

 

- hosts: 127.0.0.1

  connection: local

  gather_facts: no

- hosts: apps

  tasks:

  - name: debug

    debug: msg={{ client_name }}

- hosts: proxy

  tasks:

[Kai Stian Olstad]

On 28.02.2019 14:35, Jeffrey Agnitsch wrote:
>
> - hosts: proxy
> tasks:
>
> - debug: msg="{{ item['client_name'] }}"
> with_items: "{{ groups['apps'] }}"

Sorry about that it should of course be

- debug: msg="{{ hostvars[item]['client_name'] }}"
with_items: "{{ groups['apps'] }}"

--
Kai Stian Olstad

[Jeffrey Agnitsch]

Yeah that worked for a debugging scenario so awesome and thanks for that. Might you have any idea how to use those called variables to edit text files? Namely here is the bigger playbook I am trying within the proxy role. I am trying to have it change the name of the .conf file as well as manipulate text within the prod_proxy_conf.j2. It keeps stating that there is an undefined variable however any thoughts?

proxy role main.yml

- name: " Proxy | Setup Proxy"

  template:

    src: /etc/ansible/files/proxy_files/prod_proxy_conf.j2

    dest: /etc/httpd/conf.d/ "{{ hostvars[item]['client_name'] }}".conf

    with_items: "{{ groups['app'] }}"

- name: Proxy | Restart Proxy

  command: apachectl graceful

 

 - name: Clone template and customize

    delegate_to: 127.0.0.1

    vmware_guest:

      hostname: "{{ vcenter_hostname }}"

      username: "{{ vcenter_username }}"

      password: "{{ vcenter_password }}"

      folder: "NECO-App"

      validate_certs: "false"

      datacenter: "{{ vcenter_datacenter }}"

      cluster: "{{ vcenter_cluster }}"

      state: "poweredon"

      name: "{{ inventory_hostname }}"

      template: "{{ app_vsphere_template }}"

      networks:

      - name: "{{ app_network }}"

        ip: "{{ server_ip }}"

        netmask: "{{ servers_netmask }}"

        gateway: "{{ app_gateway }}"

        domain: "{{ app_domain }}"

        dns_servers:

        - "{{ dns_lookup }}"

      wait_for_ip_address: yes

  - name: add to in memory inventory

    add_host:

      hostname: "{{ item }}"

      groups: new

    with_items: "{{ groups.app }}"

  tasks:

  roles:

    - { role: common }

    - { role: create_instance }

    - { role: setup_tpms }

    - { role: upgrade_jboss }

- hosts: proxy

  tasks:

  roles:

    - { role: proxy }

 

 

[Kai Stian Olstad]

On 01.03.2019 15:32, Jeffrey Agnitsch wrote:
>
>>
>> Yeah that worked for a debugging scenario so awesome and thanks for that.
>> Might you have any idea how to use those called variables to edit text
>> files? Namely here is the bigger playbook I am trying within the proxy
>> role. I am trying to have it change the name of the .conf file as well as
>> manipulate text within the prod_proxy_conf.j2. It keeps stating that there
>> is an undefined variable however any thoughts?

Without the actual output it's impossible to help.

> proxy role main.yml
> - name: " Proxy | Setup Proxy"
> template:
> src: /etc/ansible/files/proxy_files/prod_proxy_conf.j2
> dest: /etc/httpd/conf.d/ "{{ hostvars[item]['client_name'] }}".conf

You can't use double quotes in dest, unless you filename actually contains quotes.

dest: /etc/httpd/conf.d/{{ hostvars[item]['client_name'] }}.conf

--
Kai Stian Olstad