Couchbase operations in DCT

Couchbase operations in Data Control Tower (DCT) provide a centralized control plane for managing Couchbase data ingestion and virtualization across one or more Delphix Continuous Data Engines.

Using DCT, you can:

• Discover Couchbase installations on registered environments

• Create source configurations for Couchbase clusters and buckets

• Ingest Couchbase data into Delphix-managed storage using supported ingestion methods

• Capture snapshots and manage dSource lifecycle operations

• Provision and manage virtual Couchbase databases (VDBs) for downstream use cases

Key components

• Continuous Data Engine – Executes Couchbase discovery, ingestion, snapshot, and virtualization operations. For more information, read Connect a Continuous Data Engine in DCT.
• Couchbase connector plugin – A JSON-based connector that enables engine-side discovery of Couchbase installations. For more information, read Upload the Connector.json in DCT.
• Infrastructure connections (environments) – Registered Couchbase source, staging, and target hosts that DCT communicates with over SSH.
• Source configurations – Logical definitions that identify which Couchbase clusters and buckets can be ingested as dSources. For more information, read Create a source configuration for Connectors in DCT.
• dSources – Managed representations of Couchbase data sources used for snapshotting, bookmarking, and provisioning.
• Virtual Databases (VDBs) – Writable Couchbase databases provisioned from dSource or VDB snapshots.

Prerequisites

Before performing Couchbase operations in DCT:

• Connected Continuous Data Engine – Running and communicating with DCT

• Couchbase connector uploaded – Latest connector JSON file installed on engine

• Couchbase binaries installed on:

  • Source environment

  • Staging environment

  • Target environment(s)

• Consistent Couchbase version – All environments must have identical Couchbase version

• SSH access to all environments – Port 22 or configured SSH port

• Toolkit directory configured and writable – At least 2GB free space on each host

• expect utility installed – Required on staging and target hosts for secure credential handling. Verify with: which expect

• OS user configuration – Environment user must:

  • Be in the couchbase OS group

  • Have passwordless sudo privileges for: mount, umount, mkdir, rmdir

  • Have read/write access to Couchbase data paths

• Required network connectivity:

  • SSH (TCP 22) – For host communication

  • Couchbase management (TCP 8091) – For cluster communication

  • Couchbase data (TCP 11210) – For XDCR replication (binary protocol)

  • NFS (TCP 2049, 111, 1110, 54043-54045) – For storage mounts

Limitations

• Connector downgrades are not supported

• Source configurations linked to active dSources cannot be deleted

• Couchbase only supports:

  • XDCR ingestion (continuous replication)

  • Backup-based ingestion (point-in-time snapshots)

• Point-in-time recovery is not supported – Data recovery based on snapshots only

• Multi-node VDB limitations:

  • Child VDB cannot be provisioned from multi-node VDB

  • Multi-node VDB cannot be cloned

• One environment can be associated with only one dSource/VDB at a time

DCT workflow

Follow this workflow to manage Couchbase data in DCT: