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,…

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…

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…

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…

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…

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 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…

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…

Microservices architectures offer immense flexibility and scalability, but deploying updates to these distributed systems can be challenging. To minimize downtime and risk, modern DevOps practices leverage advanced deployment strategies. This detailed tutorial will focus on two prominent techniques: Blue-Green Deployment and Canary Deployment. 1. Introduction to Microservices Deployment Challenges Before diving into the strategies, let’s…

Introduction Kubernetes is a powerful container orchestration platform, and as clusters grow in size and complexity, it becomes essential to logically separate resources for different teams, environments, or applications. This is where Namespaces in Kubernetes come into play. Namespaces provide a mechanism for isolating groups of resources within a single Kubernetes cluster. What is a…