Kubernetes Horizontal Pod Autoscaler Explained
Understand how HPA decides when to add or remove pods, the metrics it can scale on, and the tuning knobs that prevent flapping and runaway scaling.
·4 min read · #kubernetes#autoscaling#hpa
Blog
1745 posts · page 23 of 37
Kubernetes Ingress vs LoadBalancer vs NodePort Explained
Understand the three ways to expose a Kubernetes service to the outside world, the tradeoffs of each, and how to pick the right one for your workload.
·5 min read · #kubernetes#networking#ingress
Kubernetes Init Containers: A Practical Tutorial
Learn how Kubernetes init containers work, when to use them for setup tasks, and how to build robust pod initialization pipelines with real YAML examples.
·4 min read · #kubernetes#k8s#init-containers
Kubernetes Jobs vs CronJobs: Run Batch Work the Right Way
Compare Kubernetes Jobs and CronJobs with real YAML, retry semantics, and the gotchas that turn a simple nightly task into a 3 AM page.
·4 min read · #kubernetes#jobs#batch
Kubernetes Node Affinity and Anti-Affinity: A Practical Guide
Understand how nodeAffinity and podAntiAffinity steer the scheduler, with real YAML, hard vs soft rules, and the performance traps to avoid.
·4 min read · #kubernetes#scheduling#affinity
Kubernetes Networking: Services, kube-proxy, and CNI Plugins
How traffic actually flows in a Kubernetes cluster: the pod network, services, kube-proxy modes, and what a CNI plugin really does.
·4 min read · #kubernetes#networking#cni
Kubernetes Operators and CRDs: A Practical Introduction
How CustomResourceDefinitions extend the Kubernetes API and how operators encode operational knowledge as controllers reconciling desired state.
·4 min read · #kubernetes#operators#crd
Kubernetes Pod Disruption Budgets Explained
Learn how PodDisruptionBudgets keep your service available during voluntary disruptions like node drains, with real YAML and the failure modes to watch.
·4 min read · #kubernetes#availability#pdb
Kubernetes RBAC Cheatsheet: Roles, Bindings, and Service Accounts
A concise tour of Kubernetes RBAC: roles vs cluster roles, bindings, service accounts, and patterns that scale without becoming a permissions zoo.
·4 min read · #kubernetes#rbac#security
Kubernetes Readiness vs Liveness Probes: A Practical Guide
Understand the difference between readiness and liveness probes in Kubernetes, when to use each, and how to configure them safely in production workloads.
·4 min read · #kubernetes#k8s#probes
Kubernetes Resource Requests and Limits Explained
What requests and limits really do, how they interact with the scheduler and the OOM killer, and how to set them without overpaying or getting throttled.
·4 min read · #kubernetes#resources#scheduling
Kubernetes Secrets: Best Practices for Production
Practical patterns for managing Kubernetes Secrets safely: encryption at rest, external secret stores, RBAC scoping, rotation, and avoiding common leaks.
·4 min read · #kubernetes#k8s#secrets
Kubernetes Service Mesh with Istio: A Practical Overview
Understand what a service mesh actually does, how Istio implements it on Kubernetes, and when the operational cost is worth the features you gain.
·4 min read · #kubernetes#istio#service-mesh
Kubernetes Stateful vs Stateless Workloads
Understand when to use Deployments vs StatefulSets, what stable identity buys you, and how to operate stateful workloads safely on Kubernetes.
·4 min read · #kubernetes#statefulset#deployment
Kubernetes Vertical Pod Autoscaler: A Practical Guide
Learn how the Vertical Pod Autoscaler right-sizes CPU and memory requests, when to use it instead of HPA, and how to deploy it safely in production.
·4 min read · #kubernetes#autoscaling#vpa
Best Time to Buy and Sell Stock II — Greedy Sum of Positive Deltas
Solve the multi-transaction stock problem with the greedy peak-valley insight: sum every positive daily delta. Includes complexity analysis and DP alternative.
·4 min read · #leetcode#arrays#greedy
Capacity to Ship Packages Within D Days — Binary Search
Solve Capacity to Ship Packages Within D Days by binary searching the ship capacity. Includes feasibility check, tight bounds, and a worked example.
·5 min read · #leetcode#binary-search#arrays
Contains Duplicate — The Hash Set Solution
A clear walkthrough of the Contains Duplicate problem, covering brute force, sorting, and the optimal hash set approach with complexity analysis.
·4 min read · #leetcode#arrays#hash-set
Find Peak Element — Binary Search on Slope
Solve Find Peak Element in O(log n) by binary searching on the slope direction. Includes diagram and edge cases.
·5 min read · #leetcode#binary-search#arrays
First Bad Version — Classic Binary Search
Solve First Bad Version with binary search and overflow-safe midpoint calculation. Includes API constraints and complexity.
·4 min read · #leetcode#binary-search#easy
Koko Eating Bananas — Binary Search on Answer
Solve Koko Eating Bananas by binary searching the eating speed. Includes the monotonic predicate, ceiling division, and complexity.
·5 min read · #leetcode#binary-search#arrays
Majority Element — Boyer-Moore Voting
Solve Majority Element in O(n) time and O(1) space using Boyer-Moore majority vote. Includes intuition, walkthrough, and edge cases.
·4 min read · #leetcode#arrays#boyer-moore
Missing Number — Sum and XOR Tricks
Solve the Missing Number problem with three approaches: hashing, Gauss sum formula, and XOR. Includes complexity analysis and interview tips.
·5 min read · #leetcode#arrays#math
Move Zeroes — Two-Pointer In-Place Solution
Solve Move Zeroes in O(n) time and O(1) space using a write pointer. Includes walkthrough, edge cases, and interview tips.
·4 min read · #leetcode#arrays#two-pointers
Pascal's Triangle — Row-by-Row Construction
Build Pascal's Triangle in O(n^2) time using simple row-by-row addition. Includes a clear diagram, edge cases, and complexity analysis.
·5 min read · #leetcode#arrays#math
Plus One — Carry Propagation Done Right
Add one to a big integer stored as a digit array by walking from the back. Includes carry handling, the all-nines edge case, and complexity analysis.
·4 min read · #leetcode#arrays#math
Remove Duplicates from Sorted Array — Write-Pointer Pattern
Solve Remove Duplicates from Sorted Array in O(n) time and O(1) space with the two-pointer write-pointer pattern. Includes walkthrough, edge cases, and complexity.
·4 min read · #leetcode#arrays#two-pointers
Search a 2D Matrix — Binary Search in One Pass
Solve Search a 2D Matrix by treating the sorted matrix as a flat sorted array and binary searching. Includes index arithmetic and complexity.
·5 min read · #leetcode#matrix#binary-search
Set Matrix Zeroes — O(1) Space In-Place Trick
Solve Set Matrix Zeroes in place using the first row and column as markers. Includes a step-by-step walkthrough and edge cases.
·6 min read · #leetcode#matrix#arrays
Single Number — The XOR Trick Explained
Solve the Single Number problem in O(n) time and O(1) space using XOR. Includes a walkthrough, edge cases, and follow-up variants.
·4 min read · #leetcode#arrays#bit-manipulation
JavaScript Modules: ESM vs CommonJS
A practical comparison of ES Modules and CommonJS: how they load, how they differ, interop strategies, and how to choose for a new project.
·5 min read · #javascript#esm#commonjs
Linux cgroups Explained: How Containers Get Their Limits
A practical introduction to Linux control groups. Learn what cgroups do, how v1 and v2 differ, and how Docker and Kubernetes use them to cap CPU and memory.
·5 min read · #linux#cgroups#containers
Linux Disk Management and LVM: A Hands-on Tutorial
Partition disks, build LVM volume groups, grow filesystems online, and recover safely. The Linux storage stack from physical disks to mounted paths.
·4 min read · #linux#lvm#storage
Linux Cron and systemd Timers: A Practical Comparison
Run scheduled jobs on Linux with cron or systemd timers. How they differ, when to choose each, and recipes that survive reboots and log rotations.
·4 min read · #linux#cron#systemd
Linux File Permissions: A chmod and chown Deep Dive
Understand the Linux permission model from user/group/other to setuid and sticky bits, with practical chmod and chown patterns you can use today.
·5 min read · #linux#permissions#chmod
Linux find and xargs Tutorial
Master find and xargs to locate files and run bulk operations safely. Includes -exec vs xargs, null-delimited pipelines, parallelism, and how to avoid destroying directories.
·4 min read · #linux#find#xargs
Linux iptables Firewall Basics
Learn iptables tables, chains, and rules. Build a working host firewall, understand NAT, and avoid the most common mistakes that lock you out.
·5 min read · #linux#iptables#firewall
Linux Logging with journalctl: Filters, Fields, and Forwarding
Master systemd's journal: query logs with structured filters, tail in real time, persist across reboots, and forward to a central collector.
·4 min read · #linux#systemd#journalctl
Linux Network Namespaces Tutorial
Hands-on guide to Linux network namespaces. Create isolated network stacks, connect them with veth pairs, and understand how containers get networking.
·4 min read · #linux#networking#namespaces
Linux Networking with ip and ss: The Modern Toolkit
Replace ifconfig and netstat with ip and ss. Learn to inspect interfaces, routes, and sockets on modern Linux with clear examples.
·5 min read · #linux#networking#ip
Linux Package Managers: apt vs yum
A practical comparison of apt and yum/dnf: how they resolve dependencies, where packages come from, command equivalents, and how to avoid breaking your system.
·4 min read · #linux#apt#yum
Linux Process Management Explained: ps, top, kill, and Beyond
Learn how Linux processes work, how to inspect them with ps and top, and how to control them with signals so your servers stay responsive.
·5 min read · #linux#processes#bash
Linux SSH Port Forwarding Tutorial
Learn local, remote, and dynamic SSH port forwarding with practical examples. Tunnel databases through bastions, expose local apps, and build SOCKS proxies safely.
·4 min read · #linux#ssh#networking
Linux strace Tutorial: See What Your Process Is Really Doing
Use strace to inspect every system call a process makes. Learn the essential flags, how to filter noise, and the patterns for debugging hangs, slowness, and crashes.
·5 min read · #linux#strace#debugging
systemd Service Units: A Practical Tutorial
Write, install, and operate systemd service units the right way. Learn unit syntax, restart policies, logging with journalctl, and common gotchas.
·4 min read · #linux#systemd#services
Linux tmux and screen Tutorial: Persistent Terminal Sessions
A practical guide to tmux and GNU screen for persistent shells, splits, and remote workflows, with side-by-side commands and tips for daily use.
·5 min read · #linux#tmux#screen
ML Bias Variance Tradeoff
The bias variance tradeoff explained with intuition, examples, and practical guidance on how to diagnose and reduce each component of error in your ML models.
·4 min read · #machine-learning#bias-variance#fundamentals
Confusion Matrix Deep Dive
A thorough look at the confusion matrix: how to read it, the metrics it produces, and how to use it to diagnose classifier behavior beyond a single accuracy number that often hides what is going wrong.
·4 min read · #machine learning#evaluation#confusion matrix