Blog
A focused list of articles for this topic.
13 min read · enforce cluster standards before objects reach etcd
Bad manifests reach etcd when nothing sits in the admission path. Combine ValidatingAdmissionPolicy CEL, policy engines, and carefully operated mutating or validating webhooks—with Ignore-to-Fail rollout, namespace selectors, and cert-manager TLS—so defaults and denies land before persistence.
14 min read · migrate cluster edge traffic from Ingress to Gateway API safely
Ingress packs routing, TLS, and policy into one object and leans on vendor annotations. Gateway API splits GatewayClass, Gateway, and HTTPRoute by ownership—migrate side by side with ingress2gateway, ReferenceGrant, and RequestMirror before you cut DNS.
14 min read · organize GitOps repos for multi-environment Kubernetes fleets
Flat manifest folders break when you add clusters and teams. Separate application repos with Kustomize overlays, a platform infra repo for shared components, and optional environment control-plane config—then wire promotion, CODEOWNERS, and External Secrets so changes land where they belong.
14 min read · detect namespace cost spikes and automate safe remediation
Monthly cloud bills arrive after the damage is done. OpenCost turns allocation into Prometheus metrics; rolling baselines catch namespace spikes; Alertmanager routes critical budget breaches to Argo Workflows that scale down non-critical workloads—after teams have had weeks of visibility first.
13 min read · eliminate deployment 502s with graceful pod termination
Rolling updates and node drains still cause 502s when pods ignore SIGTERM. Combine application drain, PreStop delay for endpoint removal, PDBs for voluntary disruptions, and sidecar-aware termination so users never notice a rollout.
14 min read · scale batch and queue workloads from external events
HPA scales on CPU and memory; queue consumers and batch jobs need queue depth, lag, and schedules. KEDA adds scale-to-zero, ScaledObject for long-lived workers, and ScaledJob for fan-out batches—without paying for idle pods between bursts.
14 min read · isolate tenant workloads with layered quota and network controls
One batch job with unbounded requests can throttle latency-sensitive APIs across a shared cluster. Stack tiered namespaces, ResourceQuotas, LimitRanges, default-deny NetworkPolicy, and optional dedicated node pools into one isolation model with cost labels finance can reconcile.
14 min read · turn observability signals into reliable scaling actions
CPU-only autoscaling reacts after latency is already visible to users. Build a closed loop where Prometheus records saturation and queue pressure, KEDA applies bounded scaling behavior, and dashboards track scaling health as a first-class SRE signal.
14 min read · attribute namespace spend and enforce resource budgets
Cloud billing shows cluster totals, not which namespace burned budget on unused CPU requests. ResourceQuotas cap team consumption, LimitRanges shape pod profiles, and OpenCost or Kubecost close the attribution loop—with labels finance can reconcile.
14 min read · rollback canaries when SLO burn rate exceeds policy
Canary deploys are easy to start; promoting or rolling back on evidence is not. Wire Flagger or Argo Rollouts to SLO burn-rate math so rollback happens when error budget consumption accelerates—not after a dashboard review at 3 AM.
14 min read · authenticate and authorize every pod connection by default
Default Kubernetes networking lets any pod reach any other pod. Combine default-deny NetworkPolicy, SPIRE-backed mutual authentication, and Cilium eBPF enforcement to segment east-west traffic and prove service identity—without a sidecar on every pod.
12 min read · switch production traffic atomically with instant rollback
Rolling updates mix old and new versions under live traffic. Blue-green keeps two full stacks, validates the idle color through a preview Service, then switches the production selector in one step—with instant rollback by patching back.
14 min read · unify secrets across clouds without sprawl or stale credentials
When AWS, GCP, Azure, and on-prem Vault all hold credentials, sprawl and stale rotations multiply blast radius. A central secrets plane with External Secrets Operator and short-lived dynamic credentials keeps access auditable and contained.
14 min read · enforce compliance rules on every Kubernetes API request
Wiki pages do not block a deployment. Policy as Code turns security and compliance rules into version-controlled admission checks that run on every create and update—before workloads reach production.
14 min read · attribute cluster spend and automate cost guardrails
Shared Kubernetes clusters hide who spends what until finance gets the bill. FinOps connects namespace-level usage to dollars, eliminates waste through right-sizing, and automates quotas and alerts without blocking delivery.
14 min read · secure the build pipeline from dependency to signed deploy
Production software is assembled from hundreds of dependencies, base images, and build tools. Without SBOMs, signatures, and admission policies, teams cannot prove what shipped or block tampered artifacts before they reach the cluster.
14 min read · debug kernel-level latency and network issues in production
Application metrics cannot explain TCP retransmissions, cgroup scheduling delays, or syscall hot paths. eBPF runs sandboxed programs in the Linux kernel to observe those signals with minimal overhead—without strace, sidecars, or kernel rebuilds.
14 min read · trace every request path across microservices in Kubernetes
One user request can cross dozens of services before it returns. Logs and metrics alone cannot show where latency or errors appear in the chain. This guide deploys the OpenTelemetry Operator, agent and gateway collectors, auto-instrumentation, and W3C context propagation to Tempo.
14 min read · unify traces metrics and logs through a scalable OTel Collector tier
Jaeger, Prometheus, and Fluentd as three separate stacks multiply ops cost and break correlation. This guide deploys agent and gateway Collectors with memory limits, tail sampling, exporter queues, and Kubernetes Helm patterns.
12 min read · collapse incident tooling into one auditable Slack workflow
On-call engineers still context-switch between PagerDuty, Grafana, kubectl, and wikis while minutes burn. This guide wires Prometheus Alertmanager into a Slack bot that enriches alerts, posts runbook actions, and executes approved remediation with RBAC.
11 min read · ship faster PR feedback without shared staging contention
Shared staging clusters turn into queues and config drift. This guide shows how to provision one namespace per pull request with Helm and GitHub Actions, enforce quotas, route preview traffic, and delete resources when the PR closes.
12 min read · reduce release blast radius with metric-driven progressive rollouts
Rolling updates alone still expose every user to risky changes at once. This guide combines Flagger-style canary traffic with feature flags so you can validate releases under real load and roll back fast without a full outage.
14 min read · Kubernetes security hardening for production clusters
Default clusters are easy targets for RBAC sprawl, open APIs, and plaintext etcd. This guide walks through control plane flags, Pod Security Standards, default-deny networking, node sysctl hardening, and Vault-style secrets—with a phased rollout plan.
12 min read · GitOps delivery with Argo CD or Flux on Kubernetes
Git as the contract of record stops silent drift across clusters. Compare Argo CD and Flux patterns—from install snippets to policy hooks—and adopt guardrails for secrets, observability, and audit-ready rollouts.
11 min read · secrets, credentials, and certificates in DevOps CI/CD pipelines
CI/CD needs secrets, yet sprawl and logs multiply risk. This guide covers a centralized pattern, Vault with GitLab, Kubernetes CSI mounts, and guardrails for rotation, access, and audit.
10 min read · resilience engineering and controlled failure testing in DevOps
Most outages are not caused by unknown bugs but by untested failure behavior. This guide explains how to run hypothesis-driven chaos experiments safely, measure impact, and turn findings into repeatable resilience improvements.
12 min read · hybrid platform operations and unified control planes
Hybrid estates split teams across incompatible tooling and slower incident response. This article outlines a single operational layer: shared deployment interfaces, normalized observability, policy-as-code, mesh-aware connectivity, and identity that spans both runtimes.
14 min read · infrastructure strategy and platform architecture decisions
A CTO asks for faster releases, security asks for stricter isolation, and finance asks for predictable costs. Containers and virtual machines answer these demands differently. This guide unpacks the real tradeoffs and helps DevOps teams choose architecture with fewer surprises in production.
