Journey into Kubernetes: Learning, Challenges, and Insights"

Exploring Kubernetes from the ground up, I’m learning its concepts, setting things up, and overcoming challenges along the way. With each step, I gain new insights and refine my understanding. This blog documents my journey, sharing lessons learned and practical takeaways

5/8/20241 min read

DevOps insights shared.

Kubernetes Architecture

  1. Master Node (Control Plane)

    • Manages the cluster and makes global decisions.

    • Components:

      • API Server: Entry point for all Kubernetes commands (kubectl, API calls).

      • Controller Manager: Ensures desired state (e.g., replica management).

      • Scheduler: Assigns Pods to nodes based on resource availability.

      • etcd: Stores cluster configuration and state.

  2. Worker Nodes

    • Runs application workloads.

    • Components:

      • Kubelet: Communicates with the control plane, runs Pods.

      • Kube Proxy: Manages network communication within the cluster.

      • Container Runtime: Runs containers (e.g., Docker, containerd).

  3. Pods

    • The smallest deployable unit in Kubernetes.

    • Contains one or more containers that share networking and storage.

  4. Networking

    • Ensures communication between Pods and external access.

    • Uses CNI (Container Network Interface) plugins like Calico, Flannel.

  5. Storage

    • Supports different storage types: Persistent Volumes (PV), Persistent Volume Claims (PVC).

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