Understanding Kubernetes Architecture Evolution of Application Deployment Models Application deployment has evolved through three major phases: Traditional Deployment: Direct physical machine deployment in early internet era Pros: Simple, no additional technology required Cons: No resource boundarie...
This section covers deploying common development middleware using Helm. Many vendors provide Helm charts for their components, which significantly reduces deployment complexity. MySQL Master-Slave Cluster Deployment Add the Bitnami chart repository: https://charts.bitnami.com/bitnami Search for MySQ...
Deployment controllers operate under the assumption that all replicas of an application are identical and interchangeable. This model works well for stateless workloads where any Pod can be terminated and replaced without consequence. However, distributed systems and data storage applications often...
Kubernetes abstracts all cluster components into API resources. Once instantiated, these resources become objects managed by the control plane. Resources are generally categorized by their functional scope: Wrokload Resources Manage container lifecycles and scaling: Pod, ReplicaSet, Deployment, Stat...
This guide explains the process for creating a standard user account in a Kubernetes cluster using OpenSSL for certificate generation, configuring kubectl context, and assigning permissinos via RBAC. Prerequisites Prepare a directory for the certificate authority files. mkdir /etc/k8s-certs/ cp /opt...
Overview RKE2 is a lightweight Kubernetes distribution designed for production environments, offering tight integration with upstream Kubernetes and leveraging containerd as its container runtime. It operates by running control plane components as static pods managed by kubelet. Network Requirements...
Shell scripts in Kubernetes projects often use double colons (::) in function names for namespacing purposes. This convantion helps organize functions into logical groups, similar to packages in other langauges. # Example from Kubernetes logging script kube::log::status() { local V="${V:-0}&quo...
ConfigMap is a Kubernetes resource object used to store application configuration data, decoupling configuration details from container images. This allows flexible management and updates to application configurations without modifying the image. Key characteristics of ConfigMap: Configuration Separ...
Version compatibility dictates that Kubernetes clusters must run at least version 1.8.0 when deploying Prometheus Operator releases newer than 0.18.0. For new deployments, always prefer the most recent stable release. If migrating from an older stack, upgrade the container orchestration platform bef...
Kubernetes relies on the Container Runtime Interface (CRI) to communicate with container runitmes. Docker never implemented CRI natively, so Kubernetes historically included a built-in dockershim component to bridge this gap. With dockershim maintenance ending in Kubernetes 1.24+, users are migratin...