Previously in Update we would only set req.CustomJson if a non-empty
value was provided in the config. It seems that the Opsworks API considers
a null CustomJson to mean "do not change" rather than "set to empty",
so we need to explicitly set the empty string in the request body in
order to successfully remove an already-configured custom JSON.
A "Layer" is a particular service that forms part of the infrastructure for
a set of applications. Some layers are application servers and others are
pure infrastructure, like MySQL servers or load balancers.
Although the AWS API only has one type called "Layer", it actually has
a number of different "soft" types that each have slightly different
validation rules and extra properties that are packed into the Attributes
map.
To make the validation rule differences explicit in Terraform, and to make
the Terraform structure more closely resemble the OpsWorks UI than its
API, we use a separate resource type per layer type, with the common code
factored out into a shared struct type.
DJ Home