Database Instance or simply Instance models after a single database server accessed via a host:port address or a primary/replica cluster. A typical database instance could be your on-premises MySQL instance, a PostgreSQL cluster, an AWS RDS instance etc. Each Database Instance belongs to an Environment.
Prerequisites
- Workspace Admin or Workspace DBA role
Add instance
If you choose to use sample data during onboarding, Bytebase will start two embedded sample PostgreSQL instances accessible from /tmp:8083 and /tmp:8084.
Next, scroll down to the Connection section and enter how Bytebase reaches the database.
For Host or Socket, if you run Bytebase inside Docker and connect to a database on the same host, use host.docker.internal. Check out Instance Connection Configuration for the detailed guide. 
