Pod

Useful Links:

• Kubernetes Official Documentation
• Viewing Pods and Nodes

Architecture:

Detailed Description:

A Pod is the smallest deployable unit in Kubernetes and serves as the basic building block for running applications in the cluster. Each Pod encapsulates one or more containers, which share the same resources such as storage, networking, and compute. Containers within a Pod are tightly coupled, meaning they always run together on the same node and share the same network namespace, allowing them to communicate with each other using localhost.

Typically, a Pod has a single container, but it can host sidecar containers that assist the main application container with additional tasks like logging, monitoring, or proxying requests. Pods are ephemeral by nature, designed to be replaceable and scaled according to workload demands through higher-level Kubernetes abstractions like Deployments or StatefulSets.

Key characteristics of Pods include:

• Shared Networking: All containers in a Pod share the same IP address and port space.
• Shared Storage: Volumes attached to a Pod are shared among all its containers.
• Lifecycle Management: Pods are managed by controllers like Deployments, ReplicaSets, and DaemonSets to ensure desired state is maintained.