couchbase:community runs Community Edition, free in production for clusters of up to five nodes, without XDCR. The untagged image is Enterprise Edition, free only for development and testing; production needs a paid subscription. Upstream publishes no moving major tag for Community, so community tracks the newest Community release (8.0.x at the time of writing) and moves to the next major when one ships.

Networking

Clients connect to Couchbase directly on its ports, not through a domain on the proxy, so it publishes them 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.