Top 4 Kubernetes Service Types in one diagram. The diagram below...
Alex Xu@alexxubyte
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Dec 26, 2023
~1 min read
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Top 4 Kubernetes Service Types in one diagram.
The diagram below shows 4 ways to expose a Service.
In Kubernetes, a Service is a method for exposing a network application in the cluster. We use a Service to make that set of Pods available on the network so that users can interact with it.
There are 4 types of Kubernetes services: ClusterIP, NodePort, LoadBalancer and ExternalName. The “type” property in the Service's specification determines how the service is exposed to the network.
🔹 ClusterIP
ClusterIP is the default and most common service type. Kubernetes will assign a cluster-internal IP address to ClusterIP service. This makes the service only reachable within the cluster.
🔹 NodePort
This exposes the service outside of the cluster by adding a cluster-wide port on top of ClusterIP. We can request the service by NodeIP:NodePort.
🔹 LoadBalancer
This exposes the Service externally using a cloud provider’s load balancer.
🔹 ExternalName
This maps a Service to a domain name. This is commonly used to create a service within Kubernetes to represent an external database.
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The diagram below shows 4 ways to expose a Service.
In Kubernetes, a Service is a method for exposing a network application in the cluster. We use a Service to make that set of Pods available on the network so that users can interact with it.
There are 4 types of Kubernetes services: ClusterIP, NodePort, LoadBalancer and ExternalName. The “type” property in the Service's specification determines how the service is exposed to the network.
🔹 ClusterIP
ClusterIP is the default and most common service type. Kubernetes will assign a cluster-internal IP address to ClusterIP service. This makes the service only reachable within the cluster.
🔹 NodePort
This exposes the service outside of the cluster by adding a cluster-wide port on top of ClusterIP. We can request the service by NodeIP:NodePort.
🔹 LoadBalancer
This exposes the Service externally using a cloud provider’s load balancer.
🔹 ExternalName
This maps a Service to a domain name. This is commonly used to create a service within Kubernetes to represent an external database.
--
Subscribe to our weekly newsletter to get a Free System Design PDF (158 pages): https://t.co/uc5M7CdXXC