MySQL Shell 9.0
Check information about a ReplicaSet using the
ReplicaSet.status() operation. The
ReplicaSet.status() operation supports the extended
option to get different levels of detail. For example:
ReplicaSet.status({extended:0}): Provides a
regular level of details. Only basic information about the
status of the instance and replication is included, in
addition to non-default or unexpected replication settings and
status.
ReplicaSet.status({extended:1}): Setting extended
to 1 includes Metadata Version, server UUID, replication
information such as lag and worker threads, the raw
information used to derive the status of the instance, size of
the applier queue, value of system variables that protect
against unexpected writes and so on.
ReplicaSet.status({extended:2}): Setting extended
to 2 includes important replication related configuration
settings, such as encrypted connections, and so on.
The output of ReplicaSet.status(extended=1) is similar to Cluster.status(extended=1), but the main difference is that the replication field is always available because InnoDB ReplicaSet relies on MySQL Replication all the time, unlike InnoDB Cluster which uses it during incremental recovery. For more information on the fields, see Checking a cluster's Status with Cluster.status().