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Author: Editorial Team

  • Islands (Matrix Traversal) Coding Pattern

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    1. Introduction to the Islands (Matrix Traversal) Pattern The Islands pattern refers to a class of problems where you are given a 2D grid (matrix), and you need to find or count connected groups of certain cells (usually marked as 1, X, or some special symbol). Each group or cluster of connected cells is referred…

  • Sliding Window Technique

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    What is Sliding Window? The Sliding Window is a powerful technique for solving problems that involve contiguous sequences or subarrays within a given list or string. Instead of recalculating the result for every possible subarray from scratch, we reuse previous computations, “sliding” the window forward and updating the result incrementally. This reduces time complexity significantly…

  • Kubernetes Service YAML Manifest In-Detail

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    1. Why Do We Need a Kubernetes Service? In traditional deployments, applications are accessed using IP address + Port. However, in Kubernetes: Problem: How do we access a group of Pods (that may come and go) through a stable IP and Port? Solution: Kubernetes Service A Kubernetes Service provides a stable network endpoint (Cluster IP,…

  • Kubernetes Deployment YAML Manifest

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    1. What is a Kubernetes Deployment? In Kubernetes, a Deployment is a higher-level abstraction used to manage the lifecycle of Pods. While you can create Pods directly, it’s not practical in real-world scenarios where: A Deployment automates the process of creating, scaling, updating, and rolling back Pods via ReplicaSets. 2. Why Use a Deployment Instead…

  • Kubernetes Readiness Probes

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    1. Introduction to Readiness Probes In Kubernetes, it’s crucial to prevent traffic from reaching a container before it’s ready. A container may take time to initialize (e.g., loading data, compiling templates, establishing connections), during which it should not receive user traffic. This is exactly what Readiness Probes solve. A Readiness Probe determines when a container…

  • Kubernetes Liveness Probe

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    1. Introduction to Liveness Probes Kubernetes Pods can contain containers that may crash, hang, or enter an unresponsive state due to software bugs, deadlocks, or resource issues. In such cases: This is where Liveness Probes come in. A Liveness Probe is a health check mechanism that determines whether the container inside a Pod is still…

  • Organizing Kubernetes Pods Using Labels

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    In microservices architecture, applications are broken down into smaller services, and each service often runs multiple replicas for scalability and availability. Additionally, multiple releases (e.g., stable, beta, canary) of the same service may run at the same time. This leads to hundreds or even thousands of Pods being deployed. Without proper organization, managing them becomes…

  • Kubernetes Pod YAML Manifest

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    1. Introduction to Pods In Kubernetes, a Pod is the smallest and most basic deployable unit. It represents a single instance of a running process in a cluster. A Pod can contain one or more containers, which: Pods are ephemeral – they can be stopped, deleted, or replaced by Kubernetes as needed. They are typically…

  • Kubernetes Object Names, Labels, Selectors, and Namespaces

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    Kubernetes relies on four core mechanisms to identify, organize, group, and isolate its objects: Names, Labels, Selectors, and Namespaces. These are foundational concepts you must understand before working with Kubernetes objects effectively. 1. Object Name Every Kubernetes object, such as a Pod, Deployment, or Service, must have a unique name within its namespace. The object…

  • Kubernetes Objects

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    1. What are Kubernetes Objects? Kubernetes objects are persistent entities in the Kubernetes system. They represent the desired state of your cluster: what applications or workloads should be running, what container images they use, the number of replicas, networking details, and more. When you create a Kubernetes object (via YAML or the kubectl CLI), you…