The blog post provides a comprehensive guide on setting up Cross Datacenter Replication (XDCR) with Couchbase using Docker Swarm, Docker Machine, and Docker Compose, aiming to facilitate disaster recovery and improve data access speed by replicating data across geographically diverse data centers. It details the process of setting up two data centers on a local machine, creating Docker Swarm clusters, running Couchbase containers, and configuring a Couchbase cluster, culminating in the establishment of a one-way XDCR between two Couchbase clusters. The post also mentions using Consul as a discovery service for Docker Swarm nodes and includes scripts for creating, scaling, and rebalancing Couchbase clusters. Readers are directed to a GitHub repository for the complete code used in the blog, and the document concludes by highlighting the simplicity and efficiency of managing complex deployments with Docker tools.