1 files changed, 20 insertions, 0 deletions
diff --git a/firstboot/userdata_default.yaml b/firstboot/userdata_default.yaml
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+++ b/firstboot/userdata_default.yaml
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+heat_template_version: 2014-10-16
+
+description: >
+  This is a default no-op template which provides empty user-data
+  which can be passed to the OS::Nova::Server resources.
+  This template can be replaced with a different implementation via
+  the resource registry, such that deployers may customize their
+  first-boot configuration.
+
+resources:
+  userdata:
+    type: OS::Heat::MultipartMime
+
+outputs:
+  # This means get_resource from the parent template will get the userdata, see:
+  # http://docs.openstack.org/developer/heat/template_guide/composition.html#making-your-template-resource-more-transparent
+  # Note this is new-for-kilo, an alternative is returning a value then using
+  # get_attr in the parent template instead.
+  OS::stack_id:
+    value: {get_resource: userdata}