Hey folks,
Ansible 1.9.2 here. I've been recently working on moving us over from
static inventories to using the ec2 script. One constraint I have is that I
separate different environments within the same AWS account by the
Environment tag. In this case I'm working on Environment=dev, which in my
file tree has its own folder (see tree at the bottom). The problem I'm
having is that I can't figure out how to set {{ env }} in my *- hosts:*
from my all.yml file in group_vars. It looks like group_vars as NOT read at
the time of the playbook yml file templating, but only afterwards. As an
example, assuming this all.yml:
---
env: dev
and this foo.yml:
---
- hosts: "{{ 'tag_Role_utilities:&tag_Environment_' + env }}"
tasks:
- debug: var=env
this playbook will not work:
ansible-playbook -i inventories/dev/ec2.py foo.yml
PLAY [{{ 'tag_Role_utilities:&tag_Environment_' + env }}]
*********************
skipping: no hosts matched
but if I pass the env variable as --extra-vars, then it will:
ansible-playbook -i inventories/dev/ec2.py foo.yml --extra-vars="env=dev"
PLAY [tag_Role_utilities:&tag_Environment_dev]
********************************
GATHERING FACTS
***************************************************************
ok: [172.31.57.124]
TASK: [debug var=env]
*********************************************************
ok: [172.31.57.124] => {
"var": {
"env": "dev"
}
}
PLAY RECAP
********************************************************************
172.31.57.124 : ok=2 changed=0 unreachable=0 failed=0
Note that here the value of "env" in the debug module is actually correctly
populated from the all.yml group_vars file. e.g. if I rename that var name
in both the debug module and all.yml to something like inventory_env, it
will get the value correctly.
Is this by design? Is there no way for me to template the tags in *- host:*
without using an --extra-vars? Any way I can use group_vars for playbook
templating? It would save me the need to write my own wrapper script around
ansible that would set --extra-vars for me for each separate environment I
have.
My inventories/dev tree structure is as follows:
dev
├── ec2.ini
├── ec2.py
├── group_vars
│ ├── all
│ │ ├── all.yml
│ │ └── secrets.yml
│ ├── apps
│ └── utils
└── hosts
Thank you.
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