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Accessing Cluster Applications via NodePort Service When internal access to a application isn't sufficiant and external access is required, a NodePort Service can be used. This service type exposes the application using a static port on each node’s IP. From outside the cluster, the service can be accessed via <NodeIP>:<NodePort>. He ...

Core Concepts and Terminology in Kubernetes Most concepts in Kubernetes—such as Node, Pod, Replication Controller, and Service—can be considered "resource objects." Almost all resource objects can be created, read, updated, deleted, or otherwise manipulated via the kubectl command-line tool (or API calls) provided by Kubernetes, and t ...

Exploring Activity Management and Data Transfer Activities serve as the primary entry point for user interaction. Moving between activities often requires passing data using the Intent system. Basic Activity Navigation The following example demonstrates how to capture user input and pass it to a secondary activity using Intent.putExtra(). publi ...

When an application (Application A) in Kubernetes relies on a Service name to connect to another application (Application B), and the pods backing that Service become unavailable without a quick recovery, connectivity fails. To restore service without altering Application A's connection method, you can redirect traffic to an external applicatio ...

This guide walks through deploying a containerized HTTP service on a Kubernetes cluster, covering container images, deployments, services, and ingres configuration. Building and Pushing the Container Image First, build the container image for your HTTP server and push it to a container registry. In this example, the image chengfengsunce/httpser ...

Service Lifecycle Management When a Service is started via startService(), the system automatically invokes onCreate() followed by onStartCommand(). If the same Service is started multiple times using startService(), onCreate() is called only once. To stop a Service initiated with startService(), call stopService(), which triggers onDestroy(). ...

Kompose is a CLI utility that translates docker-compose.yml files into native Kubernetes objects such as Deployments, Services, and PVCs. It eliminates the manual work of rewriitng Compose declarations into YAML manifests. Installation # Linux curl -L https://github.com/kubernetes/kompose/releases/latest/download/kompose-linux-amd64 -o kompose ...