Kubernetes Rightsizing: Which Requests to Change, and When Not To
How to right-size Kubernetes CPU and memory requests with Prometheus, and when HPA, OOMKills, bursty usage or throttling should stop a reduction.
Radar Blog12 min read
engineering
14 stories
Give Your Agent Context Before You Buy an AI SRE
We ran the same agent and model on 50 live Kubernetes faults. With read-only cluster context it reached the answer about three times faster, and was slightly more accurate. Here's what it did without that context, and how to run the same test before you buy an AI SRE.
Radar Blog10 min read
Kubernetes 1.34 End of Life: What Actually Happens on EKS, GKE, and AKS
Kubernetes 1.34 reaches end of life on October 27, 2026. What that date and the EKS, GKE, and AKS deadlines around it actually do to your clusters, and what to check.
Radar Blog14 min read
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.
Radar Blog10 min read
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.
Radar Blog12 min read
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.
Radar Blog9 min read
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.
Radar Blog11 min read
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 Blog15 min read
Radar MCP vs kubectl: A Kubernetes Agent Benchmark on 50 Faults
The same model diagnosed 50 live Kubernetes faults 3x faster on average through Radar's MCP server than through raw kubectl, with slightly higher accuracy. What we measured, why it happens, and where Radar still loses.
Radar Blog9 min read
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.
Radar Blog9 min read
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 Blog8 min readRadar'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.
Radar Blog12 min read
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.
Radar Blog9 min read
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.
Radar Blog8 min read
Showing 14 of 14 stories
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