KubernetesManifeste

KubernetesManifeste refers to the collection of YAML or JSON documents that describe the desired state of resources in a Kubernetes cluster. These manifests are the primary way to define and configure objects such as deployments, services, and storage within a cluster. They are typically stored in version control and applied to the cluster using standard tooling.

A Kubernetes manifest represents a single API object and includes fields such as apiVersion, kind, metadata, and spec. The metadata block contains identifiers like name and namespace, along with labels and annotations used for organization and selection. The spec block specifies the desired configuration for the object, for example the number of replicas and container image for a Deployment, or the ports and selectors for a Service. The status of an object is managed by the Kubernetes control plane and is not authored in the manifest.

Common resource kinds found in KubernetesManifeste include Pods, Deployments, Services, Ingress, ConfigMaps, Secrets, StatefulSets, DaemonSets, Jobs, and CronJobs. Manifests can be templated and composed to handle variations across environments, often using tools such as Kustomize or Helm to manage complexity and reuse.

Workflow and usage involve applying manifests to the cluster with kubectl apply -f, or through CI/CD and GitOps pipelines that automate updates and rollbacks. The Kubernetes control plane continuously reconciles the actual cluster state with the declared state in the manifests, making corrections as needed.

Best practices for KubernetesManifeste include version-controlling manifests, using namespaces and labels for organization, specifying resource requests and limits, keeping manifests decoupled and modular, and validating configurations before deployment.