The intent is that --bootstrap-constraints is specified for controller machines and overrides --constraints. ---constraints themselves are specified for all other machines regardless of the model. However, I think that constraints are also model specific and, thus, individual models can have their own copy.
This is correct.
The intent is that --bootstrap- constraints is specified for controller machines and overrides --constraints. ---constraints themselves are specified for all other machines regardless of the model. However, I think that constraints are also model specific and, thus, individual models can have their own copy.