Files

couchbase

Couchbase Server, single node, defined in compose.yml with container_name: db.

Networking

Publishes its ports on the host:

Ports Purpose
8091-8097 Cluster manager, views, query, search, analytics, eventing
18091-18097 The same, over TLS
11207, 11210 Data service (TLS, plain)
11280, 9123 Internal services

The admin console is on 8091. Complete the first-run setup there.

Storage

couchbase_data at /opt/couchbase/var — data, indexes, config, logs.