[openstack-dev] [heat] update_allowed vs. immutable

Praveen Yalagandula ypraveen at avinetworks.com
Mon May 2 16:55:18 UTC 2016

What is the difference between "update_allowed" and "immutable" parameters
for a property? According to the plugin guide at

True if an existing resource can be updated, False means update is
accomplished by delete and re-create. Default is False.

True means updates are not supported, resource update will fail on every
change of this property. False otherwise. Default is False.

Since any resource can be deleted and then re-created, it seems
"update_allowed" is the right parameter to define. Why do we need

Praveen Yalagandula
Avi Networks
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