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M. Oly Mahmud
M. Oly Mahmud

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A brief breakdown of Kubernetes architecture

Kubernetes architecture consists of master/control plane components and worker nodes, working together to manage containerized applications. Here's a brief breakdown:

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Control Plane (Master Node):

  • API Server: Provides communication and control via the Kubernetes API.
  • Scheduler: Distributes workloads (pods) among nodes according to the availability of resources.
  • Controller Manager: Manages endpoints, replicas, and other control loops.
  • etcd: A cluster configuration and state key-value store.
  • Cloud Controller Manager: Connects cloud-specific services to Kubernetes.

Worker Nodes:

  • Kubelet: Verifies that containers are operating as intended by running on each worker node.
  • Kube-Proxy: Network rules are managed by Kube-Proxy to - - facilitate pod communication.
  • Container Runtime: In charge of executing containers, such as Docker and containerd.

Additional Crucial Ideas:

  • Pods: The smallest deployable units are called pods, which hold one or more containers.
  • Nodes: Workload-running computers, either physical or virtual.
  • Services: Load balancing pods and stable endpoints for exposure.
  • Persistent Storage: Volumes for managing data over restarts are known as persistent storage.
  • Namespaces: Multi-tenancy logical divisions.

To efficiently manage the cluster, Kubernetes makes use of declarative configurations and intended state reconciliation.

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