Pim van Pelt 6293521157 New maglevt TUI component: out-of-band VIP health monitor ...

A small bubbletea TUI that reads maglev.yaml (repeatable --config),
enumerates every VIP, and probes each from outside the load balancer
on a tight cadence (default 100ms, ±10% jitter). HTTP/HTTPS VIPs get
a GET against a configurable URI (default /.well-known/ipng/healthz)
with per-VIP rolling latency (p50/p95/p99/max), lifetime N/FAIL
counters, LAST status, and a response-header tally. Non-HTTP VIPs
get a TCP connect probe. A bounded error panel classifies anomalies
as timeout / http-err / net-err / spike and auto-sizes to fill the
screen.

Utility: during a failover drill (backend flap, AS drain, config
push) the tally panel shows which backend each VIP is actually
steering to, with two-colour activity highlighting over a 5s
window — white = receiving traffic, grey = drained. Paired with
the rolling OK%/latency columns it gives an at-a-glance answer to
"is the VIP healthy from the outside right now, and which backend
is it hitting", without relying on maglevd's own view of the
world.

Also bumps Makefile/go.mod to build the new binary.

2026-04-15 01:23:52 +02:00

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