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:

[root@wildfly ~/ansible]$ cat test.yml

---

- hosts: local

  roles:

    - {role: testrole, tags: ['aaaa']}

here is the role:

[root@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:

[root@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.


--
Brian Coca

[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

[Brian Coca]

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



--
Brian Coca

[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

[Brian Coca]

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

--
Brian Coca