Is 90% CPU utilization a good Kubernetes target?
Find out what 90% CPU utilization means in Kubernetes and choose a target that leaves enough room for traffic spikes and new Pods to start.
Sourced guidanceMigration guides
Change tools with a plan.
Understand why you might replace or upgrade a tool, what needs to move and how to check that applications still work. Start with the explanation, then follow the technical steps.
23 articles
Original context. Clear evidence.K3s Helm Controller: what it does and when to use it
Learn what the K3s Helm Controller does and when to use it instead of running Helm commands or adopting a wider GitOps workflow.
Sourced guidanceArgo CD operations: ApplicationSets, failed syncs and recovery
Learn how Argo CD keeps deployments in sync with Git, then manage ApplicationSets, investigate failed changes and recover safely.
Sourced guidanceA practical beginner’s guide to Helm
Learn what Helm charts, values and releases are, then plan your first Kubernetes application installation and update.
Sourced guidanceBitnami alternatives: migrate charts, images and application data
Understand Bitnami charts and images, find maintained replacements and move applications without losing configuration or data.
Sourced guidanceBitnami PostgreSQL to CloudNativePG: choose an import and prove recovery
Move a PostgreSQL database from Bitnami packaging to CloudNativePG, including roles, extensions, backups and the point when applications switch writes.
Sourced guidancePlan a Django deployment on Kubernetes with Gunicorn and a proxy
Understand the roles of Django, Gunicorn, a reverse proxy and Kubernetes before deploying a Python web application.
Sourced guidanceFind the maintained successor to an old Helm chart
Find a maintained replacement for an old Helm chart without mistaking an archived package for a discontinued application.
Sourced guidanceHelm 3 to Helm 4: a tested upgrade and rollback fixture
Plan a Helm 3 to Helm 4 upgrade, check plugins and deployment automation, and reproduce the recorded small upgrade-and-rollback test.
Sourced guidanceOCI Helm registries: storing and deploying charts
Learn what an OCI Helm registry is and how to distribute charts alongside container images without confusing their versions or credentials.
Sourced guidanceImprove DevOps by fixing one delivery problem at a time
Improve software delivery by fixing one recurring delay or failure, then check whether the change helps the people doing the work.
Sourced guidanceIngress NGINX to Gateway API: migration, compatibility and rollback
Replace the retired community ingress-nginx controller with a maintained gateway while preserving application routes, HTTPS and access checks.
Sourced guidanceWhy Karpenter may leave a node running
Find out why Karpenter is keeping a lightly used node, including Pod disruption budgets, resource requests and placement rules.
Sourced guidanceKubernetes GPU scheduling: device plugins, DRA and Kueue
Understand device plugins, Dynamic Resource Allocation and Kueue, then find why a GPU application is waiting or cannot use its device.
Sourced guidanceKubernetes image signing with Cosign and Kyverno
Learn how image signatures identify a publisher and how Kyverno can reject unapproved images before they run in Kubernetes.
Sourced guidanceBuild a useful Kubernetes developer workflow with Backstage
Build a repeatable way for developers to create and deploy one kind of service, using templates, Git and clear support instructions.
Sourced guidanceCreating Kubernetes Secrets: choose the source and rotation model
Learn how Kubernetes Secrets supply application credentials and choose where passwords and tokens should be created, stored and replaced.
Sourced guidanceKubernetes security tools: match a control to the failure it addresses
Understand what Trivy, Grype, Kyverno, Falco and secret-management tools protect, then choose the checks your Kubernetes applications need.
Sourced guidanceMinIO alternatives: choosing S3 storage for Kubernetes
Understand MinIO and compare self-hosted S3 storage options for application uploads, backups and model files, then plan a safe migration.
Sourced guidanceOpenTelemetry Collector, Prometheus and Grafana Alloy explained
Understand OpenTelemetry Collector, Prometheus and Grafana Alloy, then choose how Kubernetes metrics, logs and traces reach your monitoring tools.
Sourced guidanceUpgrade a historical Prometheus Operator Helm deployment
Understand Prometheus Operator and kube-prometheus-stack, then upgrade monitoring without losing metrics, dashboards or alerts.
Sourced guidanceRedis vs Valkey on Kubernetes: choosing and migrating
Understand Redis and Valkey, decide whether they fit your cache or persistent data needs, and plan a Kubernetes migration around real compatibility.
Sourced guidancePlan a highly available AKS cluster managed with Terraform
Understand Terraform and Azure AKS, then plan a cluster that can survive the failures your application must tolerate.
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