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Kubernetes Service Load Balancer Vs ClusterIP

In Kubernetes, there are two main types of services for load balancing:

• ClusterIP
• LoadBalancer

First, let’s take a look at ClusterIP:

• ClusterIP is the default service type in Kubernetes.
• It offers internal load balancing within the cluster.
• Additionally, the service is assigned a virtual IP that allows communication with the service internally, within the cluster.
• ClusterIP enables connectivity to the service from other pods within the same Kubernetes cluster via the ClusterIP and the specified port.
• However, ClusterIP services are not accessible from outside the cluster.
• It is suitable for applications that don’t need external access.

Now, let’s take a look at the key benefits offered by LoadBalancer:

• LoadBalancer is a service type that provides external load balancing.
• Furthermore, it assigns a public IP address to the service, making it accessible from outside the cluster.
• The service is exposed externally via the cloud provider’s load balancer or a load balancer implemented by the Kubernetes platform.
• Additionally, incoming traffic to the public IP is distributed to the pods associated with the service. This results in external access to the application.
• LoadBalancer services are often used when an application needs to be accessible from the internet or when external clients need to communicate with the service.
• Furthermore, the actual load balancer implementation depends on the underlying infrastructure or the Kubernetes platform being used.

At the end of the day, ClusterIP offers internal load balancing within the cluster, while LoadBalancer exposes the service externally, enabling access from outside the cluster through a public IP address.

The choice between these service types depends on whether we require internal-only communication or need to make our application accessible from outside the cluster.

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Conclusion

To conclude, our Support Techs gave us a quick look at Kubernetes Service Load Balancer Vs ClusterIP.