[ansible-project] tags with roles

[Vladimir Ondrus]

Hi All,

I want to use tags inside the roles, here is my usecase:

I want to execute tasks marked with aaaa from testrole:

[***@wildfly ~/ansible]$ cat test.yml
---
- hosts: local
roles:
- {role: testrole, tags: ['aaaa']}


here is the role:

[***@wildfly ~/ansible]$ cat roles/testrole/tasks/main.yml
---
- name: aaaa tag
local_action: command echo
tags:
- aaaa

- name: bbbb tag
local_action: command echo
tags:
- bbbb


but both tasks are executed:

[***@wildfly ~/ansible]$ ansible-playbook -i inventory.ini test.yml

PLAY [local]
******************************************************************

GATHERING FACTS
***************************************************************
ok: [localhost]

TASK: [testrole | aaaa tag]
***************************************************
changed: [localhost -> 127.0.0.1]

TASK: [testrole | bbbb tag]
***************************************************
changed: [localhost -> 127.0.0.1]

PLAY RECAP
********************************************************************
localhost : ok=3 changed=2 unreachable=0 failed=0


Is this OK, or bug?


Regards,
Vlado

[Brian Coca]

Hi Vlado,

I think you are misunderstanding the feature. There is no sub
-election with tags on role definition, when you:
- {role: testrole, tags: ['aaaa']}

What you are doing is tagging all tasks in testrole with 'aaaa' on top
of existing tags. So it would look like this once imported:

- name: aaaa tag
local_action: command echo
tags:
- aaaa

- name: bbbb tag
local_action: command echo
tags:
- bbbb
- aaaa

You are not saying 'run only those tagged with 'aaaa', that is not
possible when specifying a role to import.
I suggest making 2 roles and only importing the one with the tasks you
want to execute.

[Vladimir Ondrus]

Hi Brain,

thanks for the explanation. Here is similar problem we have:
We have a download role which should download something from given
location(web, maven, local).
So when location is maven, I dont want to execute http steps.
But when "when" statement is after include this means that all tasks in
included yml will be executed with it.
But i would like to skip complete yml.
---
- debug: msg="Debug location: {{ location }}"

- include: maven.yml
when: location == "maven"

- include: http.yml
when: location == "http"

- include: local.yml
when: location == "local"

when location is maven i want to completly skip http and local.
I found discussion about this:
https://github.com/ansible/ansible/issues/3324

What would may be help here, would be something like goto statement:
goto: end of the playbook
goto: task="task-name"
goto: exit ansible

With this would be possible to simulate if-else in playbooks.
What do you think about this?

Vlado

Post by Brian Coca
Hi Vlado,
I think you are misunderstanding the feature. There is no sub
- {role: testrole, tags: ['aaaa']}
What you are doing is tagging all tasks in testrole with 'aaaa' on top
- name: aaaa tag
local_action: command echo
- aaaa
- name: bbbb tag
local_action: command echo
- bbbb
- aaaa
You are not saying 'run only those tagged with 'aaaa', that is not
possible when specifying a role to import.
I suggest making 2 roles and only importing the one with the tasks you
want to execute.
--
Brian Coca

[Brian Coca]

the when will be applied to each task, so they will be skipped

[Vladimir Ondrus]

this is current state:

when you want to implement this
if(x=true)
task1
task2
task3
task4
task5
if(y=true)
task6
task7

you should write when to each task:
task1 when x
task2 when x
task3 when x
task4 when x
task5 when x
task6 when y
task7 when y

but when there would be something like goto, you could save many whens, and
it would have the desired effect that task would be completely skipped:

goto label when x != true
task1
task2
task3
tast4
tast6

label

goto end when y !=true

tast6
tast7
end

Post by Brian Coca
the when will be applied to each task, so they will be skipped
--
Brian Coca

[Brian Coca]

you can write the when in the include or in 2.0 use blocks

On Thu, Jul 23, 2015 at 8:13 AM, Vladimir Ondrus

Post by Vladimir Ondrus
when you want to implement this
if(x=true)
task1
task2
task3
task4
task5
if(y=true)
task6
task7
task1 when x
task2 when x
task3 when x
task4 when x
task5 when x
task6 when y
task7 when y
but when there would be something like goto, you could save many whens, and
goto label when x != true
task1
task2
task3
tast4
tast6
label
goto end when y !=true
tast6
tast7
end

Post by Brian Coca
the when will be applied to each task, so they will be skipped
--
Brian Coca