The blog post provides a comprehensive guide on creating and scaling a Couchbase Cluster using Docker technologies, specifically Docker Machine, Docker Swarm, and Docker Compose. It details the process of setting up a three-node Docker Swarm cluster with Docker Machine, running Couchbase instances on two nodes, and subsequently forming a cluster that is rebalanced and scaled. The creation process utilizes Consul for service discovery and involves configuring Docker Machines as part of a Swarm cluster. Docker Compose is used to deploy Couchbase instances, while emphasizing the use of host networking mode to ensure container scalability across the cluster's nodes. The post outlines how Couchbase nodes are added and rebalanced within the cluster, highlights the importance of rebalancing after scaling, and demonstrates the commands needed for these operations, culminating in a scalable and balanced Couchbase cluster.