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labs/threshold-alerts: host-metric threshold alerts, every host and one server group - #154
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…ne server group (Managed ClickStack) Builder line charts grouped by host.name with tile alerts: every host >= 0.9, svc.group game-a only >= 0.8, and every host with 3 consecutive windows. Synthetic system.memory.utilization for six hosts in two groups, notifications counted at a local receiver behind a tunnel. One run on the Seoul service (ClickHouse 26.8.1.654), 2026-11-11 04:57-05:08Z: per-host notifications and resolves, the other group filtered out, consecutive windows two windows Pending first. English and Korean step-by-step guide with eight screens from the same run. Closes #153 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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New lab and guide: threshold alerts on host metrics, built with the chart builder on Managed ClickStack.
host.name, alert at least 0.9. Each host is notified and resolved on its own.svc.group = 'game-a', alert at least 0.8. The other group's host at 0.93 is not notified.Verified on our Seoul service (ClickHouse 26.8.1.654), 2026-11-11 04:57–05:08Z, one run. Synthetic
system.memory.utilizationfor six hosts. Notifications were counted at a local receiver behind a tunnel; links and hashes are redacted inresults/. The eight screens come from the same run, and every test object is deleted (--cleanup).From the HyperDX source (read 2026-11-11), "Average" on a gauge uses each series'
last_valuein the window. The run matches this: the first window fired even though the breach started 9 seconds before the window ended.The lab is not published as a notes-site card (no
web: true); that is a separate decision.Closes #153
🤖 Generated with Claude Code