Cluster node
A cluster node is an individual physical or virtual machine that participates in a distributed cluster and provides computing resources or services.
Elasticsearch in Action, Second Edition
A running instance of Elasticsearch that participates in a cluster and performs assigned search, data, or coordination responsibilities.
- How it is used
- Establishes the running Elasticsearch instances that form clusters and host distributed shards and replicas.
- How deep it goes
- Defines nodes, explains shard and replica placement, roles, joining, and scale-out; defers advanced production configuration.
- Examples
- Uses a chats index with one shard and one replica to contrast single-node allocation with adding nodes.
- What you can do after
- Operate/configure nodes to join a named cluster, distribute data, and avoid single-server replica placement.
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Google Anthos in Action
A Kubernetes node is a machine that provides compute resources for running pods in a Kubernetes cluster.
- How it is used
- Controls which cluster nodes receive Pods with hardware, storage, or placement requirements.
- How deep it goes
- Explains labels, taints, selectors, affinity, and tolerations through commands and manifests, without detailing scheduler internals.
- Examples
- Uses GPU placement, kubectl commands, and Pod manifests targeting hostnames or zones.
- What you can do after
- Operate/configure node placement with kubectl labels and taints alongside workload scheduling rules.
Akka in Action, Second Edition
A cluster node is an individual computing instance that participates as a member of a distributed cluster.
- How it is used
- Uses nodes to form a scalable, fault-tolerant Akka deployment that distributes actors and processing across JVMs.
- How deep it goes
- Explains node formation, roles, lifecycle states, failure handling, and HTTP management through runnable multi-node setup.
- Examples
- Demonstrates seed nodes on ports 2551–2553 and a role-based word-counting system with director and aggregator nodes.
- What you can do after
- Operate/configure it by starting role-specific nodes, observing membership, and managing joins or leaves through HTTP.
Read how Akka in Action, Second Edition explains cluster node →
Related concepts
- horizontal scalingused by · Horizontal scaling is adjusting system capacity by adding or removing computing nodes or equivalent instances that share or distribute the workload.
- node.rolesconfigured by · node.roles is an Elasticsearch configuration setting containing the list of roles assigned to a node.
- master-eligible nodeincludes · A master-eligible node is an Elasticsearch node assigned the master role and therefore able to vote in master elections and become the elected master.
- Clusterpart of · Cluster is the Akka Typed API component that provides access to cluster state, management, and event subscriptions.
- computer clusterpart of · A computer cluster is a group of interconnected computing nodes coordinated to provide shared computing resources, execute workloads, or deliver services.
- Kubernetes clusterused by · A Kubernetes cluster is a set of control-plane and worker machines managed by Kubernetes to run and coordinate workloads and services.
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