So I ve got an odd create refresh issue and I m not sure if

Question

So I ve got an odd create refresh issue and I m not sure if it s a bug with pulumi or the terraform openstack provider The problem is that openstack networking network defines a field called segments in it s schema When I create a network with pulumi and don t set this attribute because it s optional and honestly I m not actually sure what its for there is no segments field set in the state file that s because the openstack terraform provider never returns it as an attribute see the read method which is used as the return for create as well So MAYBE this is a bug on terraform that there s no way to mark an attribute as input only At any rate if I then call refresh pulumi then ADDS a segments field it seems because it fills in all default values for inputs which includes segments passes that struct to terraform Refresh which calls read to fill in that struct but it doesn t remove the segments field So yeh not sure who s really at fault here but did wonder if providers are prone to doing things like this if pulumi could just not fill in the default fields at all before passing to Refresh

microscopic-florist-22719 · Answer

This is probably the fault of the Terraform bridge I ll look into it today

microscopic-florist-22719 · Answer

Okay yes this is definitely the fault of tfbridge When constructing a Terraform resource state from a Pulumi resource state we convert the state to a TF resource config and then read each field out of the config <https github com pulumi pulumi terraform blob master pkg tfbridge schema go L580 L597>

microscopic-florist-22719 · Answer

It looks like we may be a bit overzealous w r t the fields we read Rather than reading only those fields which are defined by the input state we read all fields defined by the TF schema

microscopic-florist-22719 · Answer

As a consequence of this TF ends up handing back empty default values for some undefined fields

microscopic-florist-22719 · Answer

This is the theory at least slightly smiling face It s a bit surprising that we don t see this in other parts of the bridge that use the relevant function but nothing else jumps out at me

helpful-vegetable-35581 · Answer

Ah ok if you get a change together I can try and test it out

helpful-vegetable-35581 · Answer

< microscopic florist 22719> I gave your pgavlin attributes branch of pulumi terraform a go and it fixed this problem of the network erroneously being updated +1

microscopic-florist-22719 · Answer

Glad to hear it I ll see if I can get it polished off and properly tested Thanks for giving it a go