https://platform-ops-blog.vishal-abhinav.workers.dev/ Monthly deep-dives on Kubernetes, SRE, infrastructure and platform engineering — written from production, not slideware. en vishalabhinav.co.in@gmail.com (Vishal Abhinav) vishalabhinav.co.in@gmail.com (Vishal Abhinav) Tue, 15 Sep 2026 15:00:00 +0000 1440 https://platform-ops-blog.vishal-abhinav.workers.dev/assets/og/home.png https://platform-ops-blog.vishal-abhinav.workers.dev/ https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/SERVICE-MESH-OPERATIONS/service-mesh-operations.html https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/SERVICE-MESH-OPERATIONS/service-mesh-operations.html Tue, 15 Sep 2026 15:00:00 +0000 mTLS identity that turns policy into a statement about services rather than subnets, the AuthorizationPolicy default that flips one workload to deny while its neighbours stay open, retries that multiply through a call graph, and the trace headers your application still has to forward itself. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/SERVICE-MESH-FUNDAMENTALS/service-mesh-fundamentals.html https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/SERVICE-MESH-FUNDAMENTALS/service-mesh-fundamentals.html Tue, 15 Sep 2026 14:00:00 +0000 What a sidecar mesh actually buys and what it costs, the four Envoy objects every mesh CRD renders into, what service discovery adds on top of kube-dns, and the Service port name that silently disables every L7 feature. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/KUBERNETES-CLUSTER-OPERATIONS/kubernetes-cluster-operations.html https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/KUBERNETES-CLUSTER-OPERATIONS/kubernetes-cluster-operations.html Tue, 15 Sep 2026 13:00:00 +0000 Pod Security rolled out with warn before enforce, the removed API that takes workloads with it on upgrade, the difference between an etcd snapshot and a real backup, and the three cluster failures that stay silent until they are outages. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/KUBERNETES-AUTOSCALING/kubernetes-autoscaling.html https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/KUBERNETES-AUTOSCALING/kubernetes-autoscaling.html Tue, 15 Sep 2026 12:00:00 +0000 The HPA algorithm in one line and the missing resource request that silently disables it, VPA as a measuring tool before it is an actuator, why the two fight on CPU, and the single pod that pins a node against every scale-down. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/KUBERNETES-SCHEDULING/kubernetes-scheduling.html https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/KUBERNETES-SCHEDULING/kubernetes-scheduling.html Tue, 15 Sep 2026 11:00:00 +0000 Taints as the node's veto and the NoExecute effect that evicts what is already running, affinity as the pod's request, the topologyKey that gives anti-affinity its meaning, and why Pending is always a filtering result you can read verbatim. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/KUBERNETES-CONFIG-AND-ACCESS/kubernetes-config-and-access.html https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/KUBERNETES-CONFIG-AND-ACCESS/kubernetes-config-and-access.html Tue, 15 Sep 2026 10:00:00 +0000 ConfigMaps that update in place except when they do not, Secrets that are encoded rather than encrypted, namespaces that isolate far less than people assume, and RBAC's one rule — purely additive, no deny — that explains every access surprise. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/KUBERNETES-WORKLOADS/kubernetes-workloads.html https://platform-ops-blog.vishal-abhinav.workers.dev/Kubernetes/KUBERNETES-WORKLOADS/kubernetes-workloads.html Tue, 15 Sep 2026 09:00:00 +0000 ReplicaSets and why a stuck rollout is legible, DaemonSets and the update strategy that silently never rolls, Jobs and CronJobs that pile up on their own schedule, and the liveness probe that turns a dependency blip into a restart storm. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/OpenShift/OPENSHIFT-OPERATIONS/openshift-operations.html https://platform-ops-blog.vishal-abhinav.workers.dev/OpenShift/OPENSHIFT-OPERATIONS/openshift-operations.html Fri, 11 Sep 2026 11:00:00 +0000 Monitoring that is half switched off by default, LogQL that returns before it times out, the four security gates and which one refused you, and the upgrade that stops on one PodDisruptionBudget — with the pre-upgrade checks that prevent the bad ones. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/OpenShift/OPENSHIFT-NETWORKING-STORAGE/openshift-networking-storage.html https://platform-ops-blog.vishal-abhinav.workers.dev/OpenShift/OPENSHIFT-NETWORKING-STORAGE/openshift-networking-storage.html Fri, 11 Sep 2026 10:00:00 +0000 Routes and the four TLS modes, OVN-Kubernetes and the MTU fault everybody misdiagnoses, NetworkPolicy isolation that silently blinds monitoring, storage binding and access modes, and the CSI chain where each stage fails in a different log. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/OpenShift/OPENSHIFT-ARCHITECTURE/openshift-architecture.html https://platform-ops-blog.vishal-abhinav.workers.dev/OpenShift/OPENSHIFT-ARCHITECTURE/openshift-architecture.html Fri, 11 Sep 2026 09:00:00 +0000 What the distribution adds on top of Kubernetes — the Cluster Version Operator ownership chain, projects and the project template, the operator pattern under CVO and OLM, MachineConfig, SCC admission, image streams and etcd — each with the failure mode it actually produces and how to triage it. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/Infrastructure/OS/LINUX/GLOSSARY/linux-unix-glossary.html https://platform-ops-blog.vishal-abhinav.workers.dev/Infrastructure/OS/LINUX/GLOSSARY/linux-unix-glossary.html Wed, 09 Sep 2026 09:00:00 +0000 190 terms across 15 categories — fundamentals, permissions, processes, networking, storage, security, monitoring and troubleshooting — searchable in one place, with standalone deep-dive pages for the terms that need one. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/Infrastructure/OS/LINUX/TROUBLESHOOTING/linux-troubleshooting.html https://platform-ops-blog.vishal-abhinav.workers.dev/Infrastructure/OS/LINUX/TROUBLESHOOTING/linux-troubleshooting.html Mon, 07 Sep 2026 09:00:00 +0000 A runbook, not a tutorial — high load and CPU, memory and OOM, disk and I/O, network, and boot failures, each with the commands to run and what their output means. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/Infrastructure/OS/LINUX/ADVANCED/linux-advanced.html https://platform-ops-blog.vishal-abhinav.workers.dev/Infrastructure/OS/LINUX/ADVANCED/linux-advanced.html Sat, 05 Sep 2026 09:00:00 +0000 systemd internals, kernel and sysctl tuning, namespaces and cgroups, performance profiling, and LVM. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/Infrastructure/OS/LINUX/FUNDAMENTALS/linux-fundamentals.html https://platform-ops-blog.vishal-abhinav.workers.dev/Infrastructure/OS/LINUX/FUNDAMENTALS/linux-fundamentals.html Thu, 03 Sep 2026 09:00:00 +0000 Filesystem hierarchy, users and permissions, package management, process basics, and shell scripting. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/SRE/INCIDENT-MANAGEMENT/incident-management.html https://platform-ops-blog.vishal-abhinav.workers.dev/SRE/INCIDENT-MANAGEMENT/incident-management.html Tue, 01 Sep 2026 09:00:00 +0000 Severity classification, the Incident Commander role, blameless postmortems, and action-item follow-through that actually closes. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/DevOps/CICD/cicd-pipelines.html https://platform-ops-blog.vishal-abhinav.workers.dev/DevOps/CICD/cicd-pipelines.html Sat, 01 Aug 2026 09:00:00 +0000 Jenkins and GitLab CI, GitOps with ArgoCD and Flux, security gates, canary and blue-green rollouts, and secrets management. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/DevOps/K8/OBSERVABILITY/k8-observability.html https://platform-ops-blog.vishal-abhinav.workers.dev/DevOps/K8/OBSERVABILITY/k8-observability.html Wed, 01 Jul 2026 09:00:00 +0000 Prometheus and Grafana, Loki and ELK, Jaeger and OpenTelemetry, and SLO burn-rate alerting that pages you for the right reasons. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/DevOps/K8/STORAGE/k8-storage.html https://platform-ops-blog.vishal-abhinav.workers.dev/DevOps/K8/STORAGE/k8-storage.html Mon, 01 Jun 2026 09:00:00 +0000 PV and PVC, StorageClasses, CSI driver internals, StatefulSets, and a backup and DR strategy that's been tested. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/DevOps/K8/ERROR/K8-error.html https://platform-ops-blog.vishal-abhinav.workers.dev/DevOps/K8/ERROR/K8-error.html Fri, 01 May 2026 09:00:00 +0000 32 error types across 5 layers — Pod, Worker Node, Cluster, API Server and OpenShift — each with the production fix. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/DevOps/K8/ARCHITECTURE/k8-architecture.html https://platform-ops-blog.vishal-abhinav.workers.dev/DevOps/K8/ARCHITECTURE/k8-architecture.html Wed, 01 Apr 2026 09:00:00 +0000 Control plane, worker nodes, storage, CSI, PersistentVolumes, QoS classes and scheduling — with diagrams. vishalabhinav.co.in@gmail.com (Vishal Abhinav) https://platform-ops-blog.vishal-abhinav.workers.dev/DevOps/K8/Networking/k8-networking.html https://platform-ops-blog.vishal-abhinav.workers.dev/DevOps/K8/Networking/k8-networking.html Sun, 01 Mar 2026 09:00:00 +0000 Six architecture diagrams covering Pod networking, CNI plugins, Ingress, NetworkPolicy and CoreDNS. vishalabhinav.co.in@gmail.com (Vishal Abhinav)