What ways are there to exchange data between different nodes in Kubernetes?

In Kubernetes, the most common methods for data exchange between different nodes are:

• Persistent Volumes (PV) and Persistent Volume Claims (PVC): allow pods on different nodes to use a shared volume, for example, via network file systems (NFS, Ceph, GlusterFS).
• ConfigMaps and Secrets: for passing configuration data and secrets, which can be mounted into pods on different nodes.
• Network Services (Services): for data exchange through network requests between pods on different nodes.
• Message Queues and message brokers: such as RabbitMQ, Kafka, which are deployed in a cluster and provide asynchronous message exchange.

Thus, for file and state sharing — network volumes are used; for configurations — ConfigMaps/Secrets; for communication — network services or message brokers.