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Introduction to KubeStateMetrics Kube-state-metrics is a service that listens to the Kubernetes API server and generates metrics about the state of various objects like deployments, nodes, and pods. It transforms these object states into metrics that can be consumed by Prometheus. Key capabilities of kube-state-metrics include: Collecting node ...

Queue: The Foundation The basic Queue interface defines the fundamental contract for processing items. It supports adding items, retrieving them, and marking them as complete. The concrete implementation of this interface maintains three internal data structures to ensure processing order and deduplication: orderList: A slice that preserves th ...

Understanding Taints and Tolerations In simple terms: Taints: Nodes marked with taints will not have pods scheduled to them by the Kubernetes scheduler. Tolerations: Allow the scheduler to deploy pods to nodes that have taints applied. Taints Taints contain three possible values: NoSchedule: Pods will not be scheduled to nodes marked with th ...

Prometheus integrates with Alertmanager to deliver alerts based on defined rules. The workflow involves: Metric Collection: Prometheus scrapes metrics from configured targets. Rule Evaluation: Predefined alerting rules are evaluated at regular intervals. Alert Forwarding: Matching alerts are sent to Alertmanager. Notification Routing: Alertman ...

Effective collaboration between frontend and backend services in distributed architectures requires careful configuration of request routing, especially when switching between local development, staging, and production environments. This guide outlines three common deployment scenarios using Vue.js, Spring Cloud Gateway, Kubernetes, and Nginx, ...

Kubernetes (K8s) is an open-source platform designed to automate the deployment, scaling, and management of containerized applications. Originally developed by Google based on its internal Borg system, K8s has become the de facto standard for production-grade container orchestration in modern cloud-native environments. At its core, Kubernetes d ...

Cloud-native storage refers to storage architectures specifically engineered to run within containerized environments, primarily Kubernetes. Unlike traditional storage, cloud-native solutions are software-defined, distributed, and managed through the same orchestrator as the applications they serve. This integration enables dynamic provisioning ...

Prerequisites A functional Kubernetes cluster with Traefik installed as the ingress controller. Network File System (NFS) storage mounted across all nodes to ensure Jenkins configuration survives pod restarts. A private Docker registry accessible at 192.168.0.153:5000. The base environment uses an Alpine LNP stack (PHP 5.6.31 and Nginx 1.8.1) a ...

The following procedure creates a Kubernetes cluster using four worker VMs and one master VM (a total of five virtual machines). You can manage this cluster from you're local workstation or any preferred environment. Before You Begin For a simplified setup with a graphical user interface, consider using Google Kubernetes Engine (GKE) to provisi ...

Environment Preparation 1.1 Cloning GitLab Repository mkdir /root/gitlab/ cd /root/gitlab/ git clone http://172.17.17.84:85/java/java.git 1.2 Setting Up Harbor Registry Login and create a project named demo in Harbor. docker login reg.ctnrs.com # Username: admin # Password: harbor12345 docker tag <source-image> reg.ctnrs.com/demo/java-de ...