Clusters

A PostgreSQL (PG) cluster is a unified group of one or more interconnected database instances. It consists of a single primary instance that handles all write operations, along with optional standby replicas that provide high availability. This entity represents the entire logical unit, allowing for the unified management of all its nodes and configurations. Credentials are managed through the cluster resource and are used to provision and manage the cluster's database users. Customers can connect directly to the cluster using standard PostgreSQL tools to create additional users, databases, and access grants. When credentials are supplied, the behavior is additive: a new username creates a new user with cluster-wide access granted to the specified database — the previous user is preserved; a new database creates a new database and grants the specified user access to both the new and any previously accessible databases; an existing username updates the user's password. Unlike other cluster fields, omitting the credentials field leaves all existing users and databases unchanged rather than clearing them. This tag groups all operations for clusters.