Requirements

To use datacenter to datacenter replication you need the following:

• Two datacenters, each running an ArangoDB Enterprise Edition cluster, version 3.3 or higher, using the RocksDB storage engine.
• A network connection between both datacenters with accessible endpoints for several components (see individual components for details).
• TLS certificates for ArangoSync master instances (can be self-signed).
• Optional (but recommended) TLS certificates for ArangoDB clusters (can be self-signed).
• Client certificates CA for ArangoSync masters (typically self-signed).
• Client certificates for ArangoSync masters (typically self-signed).
• At least 2 instances of the ArangoSync master in each datacenter.
• One instances of the ArangoSync worker on every machine in each datacenter.

When using the kafka type message queue, you also need:

• TLS certificates for Kafka brokers (can be self-signed).

Note: In several places you will need a (x509) certificate.
The Certificates section provides more guidance for creating and renewing these certificates.

Besides the above list, you probably want to use the following:

• An orchestrator to keep all components running, e.g. systemd.
• A log file collector for centralized collection & access to the logs of all components.
• A metrics collector & viewing solution such as Prometheus + Grafana.