Ansible - read inventory hosts and variables to group_vars/all file
ansible, ansible-inventory
Solution
- name: host
debug: msg="{{ item }}"
with_items:
- "{{ groups['tests'] }}"
This piece of code will give the message:
'10.112.84.122'
'10.112.84.124'
as `groups['tests']` basically return a list of unique ip addresses `['10.112.84.122','10.112.84.124']` whereas `groups['tomcat'][0]` returns `10.112.84.124`.
Problem
I have a dummy doubt that keeps me stuck for a long time. I have a very banal inventory file with hosts and variables: ``` [lb] 10.112.84.122 [tomcat] 10.112.84.124 [jboss5] 10.112.84.122 ... [tests:children] lb tomcat jboss5 [default:children] tests [tests:vars] data_base_user=NETWIN-4.3 data_base_password=NETWIN data_base_encrypted_password= data_base_host=10.112.69.48 data_base_port=1521 data_base_service=ssdenwdb data_base_url=jdbc:oracle:thin:@10.112.69.48:1521/ssdenwdb ``` The problem is that I need to access all these hosts and variables, in the inventory file, from the group_vars/all file. I've tried the following manners to access the host IP: ``` {{ lb }} "{{ hostvars[lb] }}" "{{ hostvars['lb'] }}" {{ hostvars[lb] }} ``` To access a host variable I tried: ``` "{{ hostvars[tests].['data_base_host'] }}" ``` All of them are wrong!!! Can anyone help me find out the best practice to access hosts and variables, not from a playbook but from a variables file? EDIT: Ok. Let's clarify. Problem: Use a host declared in the inventory file in a variable file, let's say: group_vars/all. Example: I have a DB host with `IP:10.112.83.37`. Inventory file: ``` [db] 10.112.83.37 ``` In the group:vars/all file I want to use that IP to build a variable. group_vars/all file: ``` data_base_url=jdbc:oracle:thin:@{{ db }}:1521/ssdenwdb ``` In a template I use the variable built in the group_vars/all file. Template file: ``` oracle_url = {{ data_base_url }} ``` The problem is that the `{{ db }}` variable in the group_vars/all file is not replaced by the DB host IP. The user can only edit the inventory file.