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: A piece of storage in the cluster that has been provisioned by an administrator or dynamically provisioned using Storage Classes.

A container that runs alongside the main application container in a Pod to extend or enhance its functionality (e.g., logging proxies or service mesh sidecars).

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A network proxy that runs on each node in your cluster, maintaining network rules that allow network communication to your Pods from inside or outside the cluster.

Efficient resource allocation prevents applications from crashing and ensures cost-effective cloud utilization. : A piece of storage in the cluster

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Interceptors that judge, mutate, or validate requests to the Kubernetes API server after authentication and authorization. 6. Maintenance, Scaling, & Troubleshooting

Exposes the Service externally using a cloud provider's load balancer, automatically routing external traffic to NodePorts.

The smallest deployable unit in Kubernetes, containing one or more containers. Accessing the Book and Free Content Interceptors that

A more flexible, expressive way to constrain which nodes your Pod is eligible to be scheduled on, based on node labels or Pod labels already running on the node.

Manages replica sets to run a specific number of pod instances.

: Software (like containerd or Docker) that actually runs the containers. Core Workloads: Running Your Apps

: Determines if a container is ready to accept network traffic. If it fails, the pod is removed from service endpoints. or configuration files in a volume.

Networking is often where the most "magic" happens. We break down:

An API object used to store non-confidential data in key-value pairs. Containers can consume them as environment variables, command-line arguments, or configuration files in a volume.

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: The agent running on each node, responsible for managing the node's containers.

Indicates whether the application within the container has started. All other probes are disabled until the startup probe succeeds.