Engineering
How Radar works under the hood - Kubernetes internals, informers, topology, and the engineering behind the product.
Karpenter Troubleshooting: Pending Pods, Failed Launches, and Nodes That Never Join
A field guide to Karpenter failures: pending pods, LaunchFailed, VCPULimitExceeded, NodeRegistrationHealthy, and DisruptionBlocked - what each one means and where the evidence lives.
Kubernetes 1.37 Breaking Changes: What to Check Before You Upgrade
Kubernetes 1.37 removes 25 feature gates, an alpha scheduling API, and 18 kubelet flags, and starts the nftables transition. What breaks, and how to check your cluster.
Everything Is Green and Nothing Works: Network Reachability in Radar
Pods Ready, Service green, curl times out. Radar's Reachability tab traces the declared network path and live-probes it, naming the first hop that breaks.
Kubernetes Events Expire in an Hour. Your Incidents Don't.
Kubernetes events expire after one hour by default, and many of the changes that cause incidents never become events at all. How to keep history that survives.
Read-Only Is Not a Safety Boundary
Two sentences get said in every meeting where a team wires an AI agent into a cluster: it's read-only, and just use the service account. Both are wrong later.
Radar MCP vs kubectl: A Kubernetes Agent Benchmark on 54 Faults
Radar MCP reached a correct Kubernetes diagnosis in 41 seconds vs 154 seconds for raw kubectl across 54 live faults. See what the rerun changed.
MCP for Kubernetes: Live Cluster Context for AI Tools
Pointing an AI at raw kubectl works, badly. Radar's built-in MCP server gives Claude, Cursor, and friends a token-optimized, RBAC-aware view of your cluster.
Why Radar Cloud Doesn't Cache Your Cluster State
Most multi-cluster dashboards copy your cluster state into a backend cache. Radar Cloud doesn't. Here's why the reverse-proxy model is the right call.
Radar's In-Cluster Architecture: Outbound-Only, Scoped, Live by Default
How Radar's in-cluster install works: outbound-only TLS, read-only RBAC by default, ~32MB RSS. The five questions every platform team asks, answered.
Five Questions You Can't Answer With kubectl
kubectl hands you one object at a time, as raw YAML. Here are five questions - relationships, isolation, image contents, history, posture - where that runs out of road.
Cluster Audit: The 31 Checks That Catch What You Forgot
Most clusters fail the same checks. Radar's built-in audit runs 31 of them inline against your live state. Inspired by Polaris and the NSA / CISA hardening guide.
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