Asked for after looking at how real ones are built. The shape they all share
is a convention, and a convention is what lets somebody find the answer
without being taught the page: banner, components each with ninety days of
uptime, then the written record underneath. This page had only the banner —
the version that is of no use the morning after, because "Alle Dienste in
Betrieb" is true and says nothing to somebody who was locked out the evening
before.
Three things are new.
The ninety-day bar. It cannot be reconstructed after the fact: the monitoring
table holds the last verdict per instance, not a history. So a sampler
(clupilot:sample-status, every five minutes beside the monitoring sync)
writes counts into one row per component per day, and the page divides them.
A day with no row is drawn as a gap and says "nicht aufgezeichnet" — never
green. Degraded samples count as reachable in the percentage but still colour
the day: folding them into downtime reports a slow morning as an outage,
ignoring them loses the only trace of it.
The incident record. An operator reports a disruption in the console, posts
updates as it develops, and the entry that says "behoben" is the same action
that closes it — two separate steps is how a page ends up with a resolved
note under an incident that still reports as ongoing. There is deliberately
no way to edit an update: it is a statement made at a time, corrections are a
further entry. An open incident may make a component look worse than the
probes found it, never better.
Scheduled maintenance, from the windows the console already keeps rather than
a second list somebody has to remember to fill in.
The measurement moved out of the controller into ServiceHealth, shared with
the sampler, so the banner and the bars cannot disagree about what "healthy"
means.
The page now uses the shared design system and the site's header and footer.
Its self-contained stylesheet was there to survive a broken asset build; it
does not survive one — if the stylesheet cannot be served the application
serving this page is already failing, and mid-deployment every route answers
with the maintenance page. What the exemption bought was a third design
nobody maintained.
Found while building: durationMinutes had its operands the wrong way round,
and diffInMinutes is signed, so the public page printed "Dauer -86 Minuten".
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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