OS::Heat:Autoscaling group Fn::GetAttr does not work for attributes 'outputs' and 'outputs_list'

[Rabi Mishra]

OS::Heat:Autoscaling group Fn::GetAttr does not work for attributes 'outputs' and 'outputs_list' while using template version 2013-05-23.

It returns an error during stack-show for the specific output:

For something like

outputs:
server_names:
value: {get_attr: [asg, outputs_list, name]}

"The Referenced Attribute (asg outputs_list) is incorrect"

It seems get_attr is mapped to hot_funcs.GetAttThenSelect for 2013-05-23.

https://github.com/openstack/heat/blob/master/heat/engine/hot/template.py#L64.

Either we should support this for older templates or mention that these attributes are only supported >=2014-10-16.

[Steven Hardy (shardy)]

This is expected, because path based attributes require 2014-10-16, but it sounds like we need to improve the docs to make that clear.

We should not change the behaviour of the old HOT version, IMO the correct fix is to update the docs.

As a start these should probably mention it:

http://docs.openstack.org/developer/heat/template_guide/hot_spec.html#get-attr

http://docs.openstack.org/hot-guide/content/get-access-to-nested-attributes.html

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/173712

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/173727

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/173727
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=3333c42d85d2a13dc1ed87b7e593cd001f11d117
Submitter: Jenkins
Branch: master

commit 3333c42d85d2a13dc1ed87b7e593cd001f11d117
Author: Rabi Mishra <email address hidden>
Date: Wed Apr 15 14:25:38 2015 +0530

    Update documentation for path based nested attribute access

    Change-Id: I799333a08adeb15dad5397aa67bb014a574acad1
    Partial-Bug: #1444286

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/173712
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=d8e45933bcd14339b8fe07507d8b3362ba520375
Submitter: Jenkins
Branch: master

commit d8e45933bcd14339b8fe07507d8b3362ba520375
Author: Rabi Mishra <email address hidden>
Date: Wed Apr 15 12:59:05 2015 +0530

    Clarify `attributes` support status for AutoScalingGroup

    Clarify that latest HOT is required for path based get_attr
    calls using 'outputs' and 'outputs_list'.

    Change-Id: I44de426a61726d27616f6dd8a38e676fb2a6fbcc
    Closes-Bug: #1444286