What is the difference between port and target port?

“Target port” is the port on which your container is running. Port : port redirects the traffic to the container from the service. NodePort : is the port that enables the service to access the externally. Hope this answers.

What is the target port configured on Kubernetes service?

This specification creates a new Service object named “my-service”, which targets TCP port 9376 on any Pod with the app=MyApp label. Kubernetes assigns this Service an IP address (sometimes called the “cluster IP”), which is used by the Service proxies (see Virtual IPs and service proxies below).

How is container port defined in Kubernetes?

In container spec you need to define port which container is going to use. This can be defined by containerPort directive in the container spec of pod manifest. “containerPort” defines the port on which app can be reached out inside the container. once your container is spun up and the pod is running.

What is Kubernetes node port?

A NodePort is an open port on every node of your cluster. Kubernetes transparently routes incoming traffic on the NodePort to your service, even if your application is running on a different node. However, a NodePort is assigned from a pool of cluster-configured NodePort ranges (typically 30000–32767).

When should I use node ports?

A NodePort service is the most primitive way to get external traffic directly to your service. NodePort, as the name implies, opens a specific port on all the Nodes (the VMs), and any traffic that is sent to this port is forwarded to the service. says, there are many caveats to what ports are available for you to use.

What is Type NodePort?

Service of type NodePort External clients call the Service by using the external IP address of a node along with the TCP port specified by nodePort . The request is forwarded to one of the member Pods on the TCP port specified by the targetPort field. The request is forwarded to one of the member Pods on TCP port 8080.

What is target port?

TargetPort is the port on which the service will send requests to, that your pod will be listening on. Your application in the container will need to be listening on this port also. NodePort exposes a service externally to the cluster by means of the target nodes IP address and the NodePort.

What is port and target port in Kubernetes?

Port exposes the Kubernetes service on the specified port within the cluster. TargetPort is the port on which the service will send requests to, that your pod will be listening on. Your application in the container will need to be listening on this port also.

Does NodePort do load balancing?

The NodePort abstraction is intended to be a building block for higher-level ingress models (e.g., load balancers). It is handy for development purposes, however, when you don’t need a production URL.

Do you need Load Balancer for Kubernetes?

At a quick glance, Kubernetes architecture encompasses all the components you need – like load balancer integration, egress gateways, network security policies, multiple ways to handle ingress traffic, and routing within the cluster.

What is the difference between load balancer and NodePort?

NodePort wins on simplicity, but you need to open firewall rules to allow access to ports 30,000 to 32,767, and know the IPs of the individual worker nodes. LoadBalancer when on a public cloud, or supported by MetalLB, works great with the service being able to control the exact port it wants to use.

What is targetport and portport in Kubernetes?

Port exposes the Kubernetes service on the specified port within the cluster. Other pods within the cluster can communicate with this server on the specified port. TargetPort is the port on which the service will send requests to, that your pod will be listening on.

What is the difference between ‘Port’ and ‘targetport’?

“`port` is where something will be listening. For services it is the port that the service will listen on. `targetPort` is where the service should route traffic. `By default the targetPort will be set to the same value as the port field.

Do I need to specify an empty port list in Kubernetes?

You don’t really need to specify this list—even if it’s empty, as long as your containers are listening on the port, they’ll still be available for network access. This just provides some extra information to Kubernetes. The service’s service.spec.ports list configures which requests to a service port get forwarded to which ports on its pods.

What is node port in Kubernetes?

NodePort: A NodePort service makes it possible to access a Service by directing requests to a specific port on every Node, accessed via the NodeIP. (Kubernetes automatically creates a ClusterIP service to route the request.) So from outside the cluster, you’d send the request to : .