Open rjlohan opened 4 years ago
@rjlohan trying to assemble a list of likely stateful resource types here to help prevent data loss: https://github.com/aws-cloudformation/cfn-python-lint/blob/f476b226753a6df494091f392d78990ef93517ef/src/cfnlint/rules/resources/UpdateReplacePolicyDeletionPolicyOnStatefulResourceTypes.py#L22-L44
In addition to this problem with createOnlyProperties
being more nuanced than being expressable in just a boolean, the same problem applies to readOnlyProperties
and writeOnlyProperties
as well
https://twitter.com/InesParnisari/status/1327040431138299904
Currently, the CloudFormation resource specification and the documentation do not distinguish the difference between an update operation which fully replaces a resource (including data loss) from those updates which cause some other kind of downtime (e.g a server or database reboot).
The documentation maps both of these concepts to 'Update requires: some interruption' and the resource spec maps only the fully immutable replacement operation, as does the schema currently.
We could include a schema property to signal that a property may cause downtime without data loss as a distinguishing concept.