Pod-to-service communication
Pods in Kubernetes are designed to be temporary and can be created, terminated, and scaled up or down based on the traffic demand. This means that the IP address of a pod can change frequently, making it difficult for clients to connect to them.
Kubernetes networking addresses this issue through the utilization of its service feature, which allocates a stable virtual IP address to the frontend for establishing connections with backend pods linked to the service. Additionally, the service distributes traffic directed toward this virtual IP to the group of related pods in a load-balanced manner.
Figure 4.14 – Pods communicate via Services
Furthermore, a service tracks the IP address of a pod, so even if the pod’s IP address changes, clients can still connect to it without any problem because they are only communicating with the static virtual IP address of the service. This makes it possible for clients to connect...
