Potentially incorrect resolving get_attr function for Resource Group

[Sergey Kraynev]

The one of common case is creation stack with ResourceGroup resource, where each element is specified as via custom template.

Currently we have strange behavior when try to get some attributes from this resource (when attribute as defined as output of nested stack).

There is example of templates:

main template: http://paste.openstack.org/show/491629/
b.yaml - http://paste.openstack.org/show/491630/
c.yaml - http://paste.openstack.org/show/491631/

There is example of output for stack created with using mentioned templates:
http://paste.openstack.org/show/491587/

It's expected behavior and we just need to update our documentation to
clarify these questions/examples.

[Peter Razumovsky (prazumovsky)]

Don't see there any problem. In rg_4 you get rg_a_public_ip attrbiute for the first resource if group, type(rg_a_public_ip) == str. In rg_2 you get first element of rg_a_public_ip attrbiute of each resource, so you get list of first characters of each attribute rg_a_public_ip in case of string-type rg_a_public_ip.

Look, I change in main template count of resources if rg_a to 2 and get after that next response: http://paste.openstack.org/show/492214/

IMO, there's no bug.

[Sergey Kraynev (skraynev)]

As was discussed in related mailing thread [1], it's a new behavior and it's expected result. So we should just update our existing docs with new examples and explanations about how it works.

p.s. bug description will be also updated

[1] http://osdir.com/ml/openstack-dev/2016-03/msg01242.html

[Peter Razumovsky (prazumovsky)]

OK, will do.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/300497

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/300497
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=f18589261ba32394ddde988797adc1a79ed6dba1
Submitter: Jenkins
Branch: master

commit f18589261ba32394ddde988797adc1a79ed6dba1
Author: Peter Razumovsky <email address hidden>
Date: Fri Apr 1 16:55:29 2016 +0300

    Add information about ResourceGroup attributes

    Add info that ResourceGroup get_attr returns list
    of attributes, if there's no resource_index.

    Change-Id: I184bb142715b29eb770cb88bd60586576ac7bc8f
    Partial-bug: #1561157