Slide 17
Slide 17 text
Constants, Variables, Parameters
role/vars are constants
play vars are constants too, but roles are
better
role/defaults are nothing more than examples
group_vars and host_vars exist at both
inventory level and playbook level
most logical would be to override playbook
vars with inventory vars
keep things simple, don’t mix
$ grep $ -r
playbook/play.yml:- hosts: all
playbook/play.yml: tasks:
playbook/play.yml: - debug: var=myvar
inventory/hosts:localhost
inventory/group_vars/all:myvar: inventory
playbook/group_vars/all:myvar: playbook
$ ansible-playbook -i inventory/hosts playbook/play.yml
PLAY ***************************************************************************
TASK [setup] *******************************************************************
ok: [localhost]
TASK [debug var=myvar] *********************************************************
ok: [localhost] => {
"changed": false,
"myvar": "playbook"
}
PLAY RECAP *********************************************************************
localhost : ok=2 changed=0 unreachable=0 failed=0
[2.1.0 (devel bd0f9a4afc)] serge@goldorak:~/Temp/ansible2$