On 26/06/15 15:14, Hongbin Lu wrote:
Hi team,
I would like to start my question by using a sample template:
heat_template_version: 2014-10-16
parameters:
count:
type: number
default: 5
removal_list:
type: comma_delimited_list
default: []
resources:
sample_group:
type: OS::Heat::ResourceGroup
properties:
count: {get_param: count}
removal_policies: [{resource_list: {get_param: removal_list}}]
resource_def:
type: testnested.yaml
outputs:
resource_list:
value: # How to output a list of resources of sample_group? Like
resource_list: ['0', '1', '2', '3', '4']?
As showed above, this template has a resource group that contains
resources defined in a nested template. First, I am going to use this
template to create a stack. Then, I am going to update the stack to
scale down the resource group by specifying (through parameters) a
subset of resources that I want to remove. For example,
$ heat stack-create -f test.yaml test
$ heat stack-show test
$ heat stack-update -f test.yaml -P count=3;removal_list=1,3 test
I want to know if it is possible to output a “resource_list” that lists
all the removal candidate, so that I can programmatically process the
list to compile another list (that is “removal_list”) which will be
passed back to the template as a parameter. Any help will be appreciated.
This is not really an openstack-dev@ question, and would be better
directed at the openstack@ mailing list or, preferably, ask.openstack.org.
That said, assuming you're running Juno, the 'outputs' attribute[1] will
return a dict of the outputs from the ResourceGroup members, so you can
infer the membership from the keys in that dict.
cheers,
Zane.
[1]
http://docs.openstack.org/developer/heat/template_guide/openstack.html#OS::Heat::AutoScalingGroup-attrs
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