Ability to set defaultTags for provider

[dmitrykuleshov-goreel]

We start adoption of Crossplane in our environment. And as usual (I assume) it is a migration from Terraform. As we have relatively big infrastructure, tagging is quite important for cost monitoring, ownership, etc.

This issue kinda relates to #254.

Because we migrate from terraform we were looking for functionality similar to default_tags.

I see that crossplane-runtime already sets some specific Tags, so communication between provider and runtime is already in place.

func GetExternalTags(mg Managed) map[string]string {
	tags := map[string]string{
		ExternalResourceTagKeyKind: strings.ToLower(mg.GetObjectKind().GroupVersionKind().GroupKind().String()),
		ExternalResourceTagKeyName: mg.GetName(),
	}

Is it something you can consider?
Potentially we would be interested in contribution, but need architectural guidance.

[bobh66]

Have you looked at function-tag-manager?

[dmitrykuleshov-goreel]

Yes, I did and we are using it right now. But it works for Composite resources. If I want to create simple resource (e.g. aws s3 bucket) I need to pass forProvider.tags which is not so convenient with common tags (environment, cluster, etc.)
I think it would be a nice feature, it allows platform engineers enforce some specific tags each resource have to have, without forcing users to follow rules (which is hard-to-impossible).