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Build an HR Policy Chatbot with RAG, Step by Step
Build an HR policy chatbot that answers from your own documents, with citations. Real screenshots, sample files, and how to test prompt changes before they go live.
Kubernetes MCP Servers Compared: kubectl, EKS, Argo CD
Five Kubernetes MCP servers compared: what each can see and change, where it runs, how it authenticates, and which one to give an AI assistant.
Deploy & Debug Kubernetes from Claude Code with MCP
Connect Claude Code to your Kubernetes deployments with MCP: find failing deploys, read build logs, redeploy and promote a preview to production, safely.
cert-manager: Failed to Finalize Order, 404 Certificate Not Found
Why Let's Encrypt sometimes answers a valid order with a 404, why cert-manager then waits an hour, and how to cut that wait to five minutes with one supported setting.
What Is Kubernetes? Architecture, Objects and Uses
What Kubernetes is, the problem it solves, control plane and node components, core objects such as Pods and Deployments, and when you need it.
What Is an MCP Server? Model Context Protocol Guide
An MCP server exposes tools, resources and prompts to AI apps over the Model Context Protocol. Roles, transports, JSON-RPC, a Python example, and security.
What Is Amazon ECS? Tasks, Services and Fargate
What Amazon ECS is, its core concepts, Fargate vs EC2 capacity, networking, IAM roles, logging, deployments and pricing, with a minimal task definition.
What Is a Sandbox Environment? Types and Setup
What a sandbox environment is, its three types, how it differs from dev, test, staging and production, and a Kubernetes setup with quotas and network policy.
TPU vs GPU: Differences for AI Training and Serving
Compare TPU and GPU for AI training and inference: chip design, CUDA vs XLA software, what AWS offers instead of TPUs, and what SeaGit supports on EKS.
Squarespace Domains: Point Your Domain to AWS
Point a Squarespace domain at AWS: where the DNS settings live, a CNAME for a subdomain, moving nameservers to Route 53, and transfers.
Redis Use Cases: Caching, Sessions, Rate Limits, Queues
Real Redis use cases with code: cache-aside, sessions, rate limiting, job queues, leaderboards and locks, the eviction policy each needs, and when Redis Cluster helps.
Back Up Redis to S3 and Restore It (Even With AOF On)
Back up Redis or Valkey to S3 on Kubernetes with redis-cli --rdb and a CronJob, then restore it. Why copying dump.rdb restores nothing when AOF is on, and the fix.
Continuous Integration Tools: 10 CI Tools Compared
Compare 10 CI tools: GitHub Actions, GitLab CI/CD, Jenkins, CircleCI, Buildkite, Tekton and Argo Workflows. Hosting, config, runners, pricing model and best fit.
How to Check Node Version (and Switch or Pin It)
Check your Node.js version with node -v, read the release lines, switch with nvm or fnm, and pin one Node version for your project, Docker and CI.
Sidecar vs Init Containers: Native Sidecar Setup
Init containers and sidecar containers compared: start order, lifetime, probes and shutdown. Native sidecars with restartPolicy Always, and when to use each.
Readiness Probe Failed in Kubernetes: How to Fix It
Readiness probe failed and the pod shows 0/1 Ready? Read the probe event, fix the path, port or bind address, and tune the probe timing.
Pod Stuck in Terminating in Kubernetes: How to Fix
Pod stuck in Terminating for minutes? Find the finalizer or the unreachable node, fix the cause, and only force-delete the pod as a last step.
Pod Disruption Budgets: Keep Pods Up During Node Drains
What a PodDisruptionBudget limits, how kubectl drain respects it, the single-replica trap that blocks node maintenance, and how to choose maxUnavailable.
Namespace Stuck in Terminating: How to Fix It
Kubernetes namespace stuck in Terminating? Find the leftover objects or the failing API service, clear them, and finalize only as a last step.
Liveness vs Readiness Probe: What Each Does in Kubernetes
Liveness vs readiness probe in Kubernetes: the restart and endpoint actions, how a startup probe gates both, and a config that avoids restart storms.
Kubernetes Secrets: What They Protect and What They Do Not
Kubernetes Secrets explained: why base64 is not encryption, the 1 MiB limit, who can read them, encryption at rest, and how to mount them safely.
Kubernetes Network Policy: Default Deny With Examples
Kubernetes network policy examples: default-deny ingress, a frontend-to-API allow rule, DNS egress, and the EKS VPC CNI mode that decides when policies apply.
Kubernetes Namespaces: What They Do and Do Not Isolate
What a Kubernetes namespace scopes, the four namespaces every cluster starts with, which objects are cluster-wide, and why a namespace is not a security boundary.
Kubernetes HPA: Autoscale Pods With autoscaling/v2
Set up a Kubernetes HPA with autoscaling/v2 YAML. Covers metrics-server, CPU requests, scaling behavior, kubectl autoscale and fixing <unknown> targets.
kubectl port-forward: Reach a Pod From Your Laptop
kubectl port-forward to a pod, Deployment or Service, why the tunnel drops after a deploy, the safe bind address, and when not to use it.
kubectl logs: Read Pod Logs, Crashes and Selectors
kubectl logs with -f, --previous, -c, --since, --tail and label selectors. Why logs come back empty, and how to read a crash-looping container.
kubectl exec: Run Commands and Open a Shell in a Pod
Use kubectl exec for a command or an interactive shell, the -- separator, multi-container pods, and kubectl debug when the image has no shell.
kubeconfig Explained: Clusters, Users and Contexts
What a kubeconfig file holds, how KUBECONFIG merges several files, the kubectl config commands you need, and how to connect to EKS with update-kubeconfig.
EKS vs ECS: How to Choose a Container Platform on AWS
EKS vs ECS on AWS compared on cost per cluster and per task, Fargate billing, the operating model, and a decision rule for choosing between them.
Docker Compose vs Kubernetes: Which One to Use and When
Docker Compose vs Kubernetes side by side: where each runs, how a Compose service maps to Kubernetes objects, and a decision rule by team size and traffic.
CreateContainerConfigError: Causes and How to Fix
Pod stuck in CreateContainerConfigError? Read the event, find the missing Secret, ConfigMap key or runAsNonRoot setting, and fix it in order.
kubectl rollout restart: Restart Pods Without Downtime
Restart Deployment pods with kubectl rollout restart, check the rollout, limit the scope, and roll back if the new pods never become ready.
Unbound Immediate PersistentVolumeClaims: The Fix
Pod Pending with unbound immediate PersistentVolumeClaims or volume node affinity conflict? Find the zonal volume, then fix binding mode and node placement.
Route 53 Orphaned Records: Find and Delete Safely
Why ExternalDNS leaves Route 53 records after a delete, how to find orphaned records and TXT owners, and how to remove alias records without DELETE errors.
Helm: another operation is in progress, how to fix
Fix Helm’s “another operation is in progress” error and a release stuck in pending-install or pending-upgrade. Diagnose, roll back safely, and prevent repeats.
ExternalDNS Not Creating Records: Route 53 Fixes
ExternalDNS not creating records, or TXT entries missing? Check sources, policy, owner IDs, TXT prefix quoting and Route 53 IAM, with commands and fixes.
CoreDNS CrashLoopBackOff on EKS: Causes and Fixes
CoreDNS CrashLoopBackOff or Pending on Amazon EKS. Separate a scheduling fault from a forwarding loop, check the add-on version, and fix it with the AWS CLI.
Migrate ingress-nginx to Gateway API, Step by Step
Move a SeaGit cluster from ingress-nginx to Gateway API with Envoy. Five stages, real screenshots, and how to undo each step until DNS moves, step by step.
Kubernetes Pod Stuck in Pending: Causes and Fixes
Read the scheduler message: insufficient CPU or memory, a taint, node affinity, too many pods on EKS or a hostPort conflict, with fixes.
OOMKilled in Kubernetes: Fix Exit Code 137
Confirm OOMKilled, measure real memory use, size requests and limits, and cap JVM and Node.js heaps below the container limit.
ImagePullBackOff in Kubernetes: Find and Fix It
ImagePullBackOff or ErrImagePull: read the pull error, then fix the tag, the ECR or registry credentials, the imagePullSecret or the network path.
HTTPRoute Not Working in Gateway API: Status Checks
Read the Accepted and ResolvedRefs conditions, then fix parentRefs, allowedRoutes, hostnames, backend ports and ReferenceGrant.
Helm Upgrade: Atomic, Dry Run and Rollback
Preview with --dry-run=server, roll back a failed upgrade with --atomic, use --force with care, and recover a release stuck in pending-upgrade.
CrashLoopBackOff in Kubernetes: How to Debug
Read the previous logs and the exit code, then fix the crash cause, the probe or the command. Triage table and kubectl commands included.
Issuing Certificate as Secret Does Not Exist
Follow the Certificate, CertificateRequest, Order and Challenge chain to the blocked step, then fix HTTP-01, DNS-01 or the issuer without burning Let's Encrypt limits.
AWS Certificate Manager on EKS with ALB
Request an ACM certificate in the cluster region, confirm it is ISSUED, set certificate-arn on an ALB Ingress, and debug the common failures.
Let's Encrypt Rate Limit: Too Many Certificates
cert-manager stuck on a Let's Encrypt rate limit? Read the error, find the limit hit, stop the retry loop, reduce issuance, and request an override if needed.
Docker Compose alternatives for production: 8 options compared
Eight Docker Compose alternatives for running multi-container apps in production: Kubernetes with Helm, Swarm, Nomad, Podman, Kompose, PaaS and stack templates.
Backstage alternatives and competitors: 9 options compared
Nine Backstage alternatives and competitors compared: hosted Backstage, developer portals, platform orchestrators and stack templates, with honest trade-offs.
Terraform EKS Module: What It Builds (and Misses)
What terraform-aws-modules/eks/aws actually creates, a working HCL example, and the node sizing, ingress, DNS, TLS and upgrade work still left for you.
Kubernetes Ingress NGINX End of Life: Now What?
Kubernetes retires Ingress NGINX in March 2026, ending releases and CVE fixes for good. What it means, how to check what you run, and migration options.
Kubernetes management tools, by the problem they solve
The categories of Kubernetes management tooling — dashboards, GitOps delivery, and managed platforms — and which problem each one actually solves.
Kubernetes cost optimization tools: 9 options compared
Nine Kubernetes cost optimization tools compared for 2026 — OpenCost, CAST AI, ScaleOps, Karpenter and more — what each does, prices and where it falls short.
Heroku Alternatives 2026: Vercel, Railway, Render
Heroku alternatives compared on where the workload runs, who operates it and what it costs, with a decision guide and migration notes.
GitOps tools: 8 options for Kubernetes delivery, compared
Eight GitOps tools compared for Kubernetes delivery — Argo CD, Flux CD, Jenkins X and more — what each does, how it prices, and the real Argo CD alternatives.
Dev, QA, staging, preview and production environments
What each environment is actually for, how they differ, and how many you really need — with the trade-offs of keeping staging identical to production.
Zero-Downtime Kubernetes Deploys: Probes & preStop
Rolling updates still drop requests without the right probes, a preStop sleep and a grace period. Here are the settings, YAML and SeaGit values to fix them.
Multi-Cluster DNS with external-dns and Route 53
Spread one hostname across Kubernetes clusters with external-dns, Route 53 weighted and latency records, placeholder adoption and cross-account roles.
Kubernetes Preview Environments per Pull Request
How Kubernetes preview environments work: per-commit builds, isolated Helm releases, DNS and TLS per preview, and promoting a validated preview to production.
Prometheus on EKS: What to Alert On (and What Not)
Page only on symptoms users feel. PromQL alert rules, Alertmanager routing, cardinality limits and retention for Prometheus on EKS, with runbook links.
Argo Workflows CI: Kaniko Builds and Exit Handlers
How to run in-cluster CI on Argo Workflows: daemonless image builds with Kaniko, safe layer caching, and onExit handlers that report every build outcome.
Wildcard TLS with cert-manager and DNS-01
Issue a Let's Encrypt wildcard certificate with cert-manager and DNS-01 on Route 53, with IRSA, cross-account roles and the IAM gaps that fail quietly.
Kubernetes DNS 5-Second Timeouts and ndots
Why Kubernetes DNS lookups stall for exactly 5 seconds, how ndots:5 multiplies queries, and a hop-by-hop checklist from the pod resolver to the VPC resolver.
Deploy a Kubernetes Cluster on AWS, Step by Step
Step by step: connect AWS, create a network, provision an EKS cluster in your own account with SeaGit, then deploy an app with DNS and TLS. Limits included.
Most Active
Kubernetes Preview Environments per Pull Request
How Kubernetes preview environments work: per-commit builds, isolated Helm releases, DNS and TLS per preview, and promoting a validated preview to production.
Build an HR Policy Chatbot with RAG, Step by Step
Build an HR policy chatbot that answers from your own documents, with citations. Real screenshots, sample files, and how to test prompt changes before they go live.
Deploy & Debug Kubernetes from Claude Code with MCP
Connect Claude Code to your Kubernetes deployments with MCP: find failing deploys, read build logs, redeploy and promote a preview to production, safely.
Kubernetes MCP Servers Compared: kubectl, EKS, Argo CD
Five Kubernetes MCP servers compared: what each can see and change, where it runs, how it authenticates, and which one to give an AI assistant.
cert-manager: Failed to Finalize Order, 404 Certificate Not Found
Why Let's Encrypt sometimes answers a valid order with a 404, why cert-manager then waits an hour, and how to cut that wait to five minutes with one supported setting.
How to Check Node Version (and Switch or Pin It)
Check your Node.js version with node -v, read the release lines, switch with nvm or fnm, and pin one Node version for your project, Docker and CI.