Your Guide to Kubernetes Networking

Your Guide to Kubernetes Networking

A good understanding of Kubernetes’ range of service types and ingresses should help you choose appropriate configurations for your clusters. Likewise, it will help minimize the complexity and resources (like provisioned load balancers) involved. Networking can be very important when dealing with microservice-based architectures. Your Guide to Kubernetes Networking

Networking can be very important when dealing with microservice-based architectures, and Kubernetes provides first-class support for a range of different networking configurations. Essentially, it provides you with a simple and abstracted cluster-wide network. Behind the scenes, Kubernetes networking can be quite complex due to its range of different networking plugins. It may be useful to try keeping the simpler concepts in mind before trying to identify the flow of individual networking packets.

A good understanding of Kubernetes’ range of service types and ingresses should help you choose appropriate configurations for your clusters. Likewise, it will help minimize the complexity and resources (like provisioned load balancers) involved.

To begin with, here are some useful facts:

1. Every pod is assigned a unique IP address

2. Pods run within a virtual network (specified by the pod networking CIDR)

3. Containers within an individual pod share the same network namespace (Linux network namespace), this means they are all reachable via localhost and share the same port space.

4. All containers are configured to use a DNS server managed by Kubernetes.

kubernetes cloud-networking devops

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