Crucial Exams

CompTIA Linux+ XK0-006 (V8) Practice Question

A DevOps team is packaging a Go web server and a Fluent Bit sidecar in one Kubernetes Pod. The web server listens on TCP port 24224, and the sidecar is configured to forward logs by connecting to http://localhost:24224/. A colleague argues that a ClusterIP Service must be created so the sidecar can reach the web server. According to how Pods behave, why is the additional Service not required?

  • Containers in a Pod share the same network namespace, so the sidecar can connect to the web server on localhost and the exposed port without any Service.

  • Each container exposes its own unique Pod IP, so inter-container traffic must always pass through a Service object.

  • Sidecar containers communicate only through shared volumes and Unix domain sockets, so creating a Service would break their internal traffic.

  • A ClusterIP Service is required because containers inside a Pod have different IP addresses and cannot use localhost for communication.

CompTIA Linux+ XK0-006 (V8)
Automation, Orchestration, and Scripting
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