Loadbalancer service
A Kubernetes LoadBalancer Service is a Service type that exposes workloads externally through a provisioned or integrated network load balancer.
Kubernetes in Action, Second Edition
The LoadBalancer service type requests an externally accessible load balancer for a Kubernetes Service from the cluster's cloud infrastructure.
- How it is used
- Makes pods reachable outside the cluster through an infrastructure-provided load balancer.
- How deep it goes
- Explains provisioning, node-port routing, a Service manifest, and configuration fields, while leaving load-balancer implementation to the infrastructure.
- Examples
- Shows a kubectl exposure command, pending and assigned EXTERNAL-IP output, a curl request, and a YAML Service manifest.
- What you can do after
- Operate/configure it with kubectl or a Service manifest, inspect EXTERNAL-IP, and connect through the assigned address.
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Road to Kubernetes
A Kubernetes LoadBalancer Service is a Service type that provisions or integrates with an external load balancer to expose workloads outside the cluster.
- How it is used
- Exposes production applications to internet traffic through a cloud-managed load balancer.
- How deep it goes
- Explains routing, standard ports, provider provisioning, static IPs, and DNS, while deferring HTTPS certificates.
- Examples
- Uses Python and Node.js applications plus an NGINX Pod to demonstrate selectors, port mappings, and public exposure.
- What you can do after
- Apply it via Kubernetes YAML to expose selected Pods and connect a custom domain to the resulting public IP.
Machine Learning Platform Engineering
A LoadBalancer service is a Kubernetes service that provisions or uses an external load balancer to expose selected pods to external clients.
- How it is used
- Exposes Kubernetes applications externally for production access through a cloud provider’s load balancer.
- How deep it goes
- Demonstrates manifest fields, creation, assigned external IPs, and requests, while deferring provider-specific configuration details.
- Examples
- Uses a FastAPI joke service, a LoadBalancer manifest, kubectl create, kubectl get service, and curl.
- What you can do after
- Operate external access by applying a manifest, retrieving the assigned external IP, and issuing HTTP requests.
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Kubernetes for Developers
A LoadBalancer Service is a Kubernetes Service type that requests an externally reachable network load balancer and external IP address.
- How it is used
- Publishes an application to internet users while also supporting internal cluster communication and service discovery.
- How deep it goes
- Explains selectors, port mapping, assigned addresses, and running-Pod routing, but defers detailed Service features to later treatment.
- Examples
- Uses a timeserver YAML manifest, kubectl service output, and curl against the provisioned external IP.
- What you can do after
- Operate a public Kubernetes endpoint by configuring a LoadBalancer Service and checking or calling its external IP.
Read how Kubernetes for Developers explains loadbalancer service →
Acing the Certified Kubernetes Administrator Exam, Second Edition
A Kubernetes LoadBalancer Service type exposes a Service externally through an integrated or provisioned load balancer.
- How it is used
- Exposes Kubernetes applications externally through a provisioned or integrated load balancer.
- How deep it goes
- Explains manifest creation, MetalLB configuration, and verification but defers load-balancer device internals.
- Examples
- Uses kubectl-generated YAML, MetalLB address-pool manifests, kubectl get svc output, and curl verification.
- What you can do after
- Operate and verify a LoadBalancer Service using kubectl, YAML, MetalLB, and an external request.
Related concepts
- IP addressproduces · An IP address is a numerical address used by the Internet Protocol to identify a network interface and support packet delivery across networks.
- load balancinguses · Load balancing is the distribution of requests or computational work across multiple resources to manage demand, reduce workload imbalance, and improve utilization or availability.
- clusterip service typealternative to · ClusterIP is a Kubernetes Service type that exposes selected Pods through a stable virtual IP address accessible only within the cluster.
- Airflow API serverconfigures · The Airflow API server is the service interface for viewing workflows, monitoring runs, and mediating database access for Airflow components.
- servicekind of · A Kubernetes Service is an API resource that provides stable network access and service discovery for a changing set of Pods or other specified destinations.
- ingress objectcontrasts with · A Kubernetes Ingress is an API resource that specifies rules for routing external HTTP and HTTPS requests to services within a cluster.
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