Hello all,
I'm implementing a custom role to setup a bunch of network device profiles
to be later associated to LXD containers.
A loop over a list of eth/br devices would be used to achieve this. The
loop is not an issue but I'd like to implement a "when" condition so to
attempt to create the bridge only when it is not there already.
To clarify further, the logic would be the following:
- for each element in the bridge mapping dictionary, run this: lxc profile
show br_dev <key>
- if the command returns 1, the bridge does not exist, so let's create it
in the next task
- run profile creation task: lxc profile create dev_br<key>
- run another task to associate the physical device to the profile
So, the problem: how do I prevent the subsequent tasks from running if the
bridges already exist? I know the "when" clause is great to prevent a task
from running in certain conditions, but what I want here is to run only
part of the task (that is, only some parts of the loop).
I'm thinking of using the output of each command's "rc" stored in the
register variable, but can't find a way to include it in my subsequent
loops!
Any alternative, cleaner way is more then welcome. A colleague suggested,
for instance, to rely on subtasks included as sub-yamls but I'm still
thinking how to turn that into reality.
I feel I've been unclear, yet I'm confident your understanding skills are
greater than my explanatory skills.
Thank you! I'm providing the files:
group_vars:
---
bridge_mapping:
250: eth0
150: eth0
23: eth1
main role file:
---
- name: check if profile exists
command: lxc profile show br_dev{{ item.1.id }}
ignore_errors: yes
register: profile_exists
with_subelements:
- exposure_alternative
- vlans
tags:
- lxd_setup
- lxd_profiles_create
- debug: var={{ item }}
with_items: profile_exists.results
tags:
- debug
- name: setup lxd profile
command: lxc profile create dev_br{{ item.key }}
with_dict: bridge_mapping
when: <what should be here?>
tags:
- lxd_setup
- lxd_profiles_create
- name: setup lxd profile dev
# sample command: lxc profile device add dev_br123 eth1 nic
nictype=bridged parent br123
command: lxc profile device add dev_br{{ item.key }} {{ item.value }} nic
nictype=bridged parent=br{{ item.key }}
with_dict: bridge_mapping
when: <what should be here?>
tags:
- lxd_setup
- lxd_profiles_create
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