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```gcp:sql:DatabaseInstance (beta-postgres-replica1):
    error: gcp:sql/databaseInstance:DatabaseInstance resource 'beta-postgres-replica1' has a problem: AtLeastOne: "clone": one of `clone,settings` must be specified. Examine values at 'DatabaseInstance.Clone'.
    error: gcp:sql/databaseInstance:DatabaseInstance resource 'beta-postgres-replica1' has a problem: AtLeastOne: "settings": one of `clone,settings` must be specified. Examine values at 'DatabaseInstance.Settings'.
    error: Preview failed: one or more inputs failed to validate```

I’ve set up a postgres replica with Pulumi very recently!

and yeah, you have to specify the settings for the replica :slightly_smiling_face:

I think you can also put `clone: 'the-name-of-the-master-instance'`  but I didn’t end up doing that because I wanted control over region and disk type, so I just ended up duplicating most of the settings from the master instance into the replica instance

Actually I think my problem is I don’t know which settings to use to indicate that it’s a read replica and that replication would be set up for Postgres. For MySQL there seems to be configuration options but I didn’t see any for Postgres. Without it I think it’ll just create a separate instance of Postgres. I’m missing something. 