Hi,
I'm confused with variable precedence of Ansible 2.0 documented
in
http://docs.ansible.com/ansible/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable
. Suppose I have playbooks and roles as follows:
hosts (inventory):
[default]
localhost x=1
roles/a/tasks/main.yml (task in role a):
---
- set_fact:
x: '{{ x + 1 }}'
roles/b/tasks/main.yml (task in role b):
---
- debug:
var: x
tasks.yml (playbook):
---
- hosts: all
gather_facts: no
tasks:
- include: roles/a/tasks/main.yml
vars:
x: 10
- include: roles/b/tasks/main.yml
- include: roles/b/tasks/main.yml
vars:
x: 20
roles.yml (playbook):
---
- hosts: all
gather_facts: no
roles:
- role: a
x: 10
- role: b
- role: b
x: 20
With Ansible 2.0.1.0 those two playbooks show diffrent results in the last
debug task:
$ ansible-playbook -i hosts tasks.yml
PLAY
***************************************************************************
TASK [include]
*****************************************************************
included: /home/yaegashi/tmp/test/roles/a/tasks/main.yml for localhost
TASK [set_fact]
****************************************************************
ok: [localhost]
TASK [include]
*****************************************************************
included: /home/yaegashi/tmp/test/roles/b/tasks/main.yml for localhost
TASK [debug]
*******************************************************************
ok: [localhost] => {
"x": "11"
}
TASK [include]
*****************************************************************
included: /home/yaegashi/tmp/test/roles/b/tasks/main.yml for localhost
TASK [debug]
*******************************************************************
ok: [localhost] => {
"x": 20
}
PLAY RECAP
*********************************************************************
localhost : ok=6 changed=0 unreachable=0 failed=0
$ ansible-playbook -i hosts roles.yml
PLAY
***************************************************************************
TASK [a : set_fact]
************************************************************
ok: [localhost]
TASK [b : debug]
***************************************************************
ok: [localhost] => {
"x": "11"
}
TASK [b : debug]
***************************************************************
ok: [localhost] => {
"x": "11"
}
PLAY RECAP
*********************************************************************
localhost : ok=3 changed=0 unreachable=0 failed=0
While include vars can override vars by set_fact, role variable can't. Is
that an expected behavior?
What prcedences are actually given to vars passed by role/include calls
respectively?
My first thought was both of them are "role and include vars" in the
precedence list in the document.
Regards,
--
YAEGASHI Takeshi <[email protected]>
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