grafana: rank the by-label panel as bars, and stop calling it open issues

Two findings on one panel, both from mara.

Form: 24 label series drawn as overlapping timeseries lines is
unreadable by construction. The panel is a current-count ranking, not a
time evolution, so it becomes a horizontal bar gauge on an instant
sort_desc query -- identity on the axis, magnitude in the bar, and a
fixed colour because colour was carrying no information that the axis
was not already carrying.

Title: the metric counts open AND closed issues. Measured, not assumed
-- the largest single label reads 1619 while gitea_issues_open reads
117, and no label can outnumber the set it is a subset of. The panel had
been asserting the opposite since it was written.
This commit is contained in:
atlas 2026-08-27 14:43:15 +02:00 committed by mara
commit 20135962de

View file

@ -379,39 +379,35 @@
},
{
"id": 30,
"type": "timeseries",
"title": "Open issues by label",
"description": "Per-label backlog. Like every panel on this board it is an INVENTORY gauge: it says how many open issues carry each label right now, never how fast they arrive or close. A flat line is a real reading, not a broken scrape. Note for whoever enables the next forge metric: forgejo reads its [metrics] section at STARTUP, so a newly enabled series does not exist until that process restarts — a config merge alone does not do it, and an absent series says absent without ever saying why. Check the process, not the metric.",
"type": "bargauge",
"title": "Issues by label — every issue ever, ranked",
"description": "How the whole issue corpus is distributed across labels, biggest first. NOT the open backlog: this metric counts open and closed issues alike, which is checkable from this board alone — the top label here is far larger than the Issues open stat beside it, and no single label can outnumber the issues it is a subset of. So read it as the shape of what the project has worked on, not as what is left. It is also a RANKING of one moment rather than a time series: the label set is as wide as the tracker's, so one line per label is unreadable by construction, and the history of any single label is an ad-hoc query, not a panel. Colour carries no meaning here; the axis carries the identity. If the panel is empty, check whether the forgejo process restarted since [metrics] last changed — a merged config alone does not enable a series, and an absent series never says why it is absent.",
"datasource": { "type": "prometheus", "uid": "@datasourceUid@" },
"gridPos": { "h": 7, "w": 24, "x": 0, "y": 19 },
"gridPos": { "h": 16, "w": 24, "x": 0, "y": 19 },
"targets": [
{
"refId": "A",
"datasource": { "type": "prometheus", "uid": "@datasourceUid@" },
"expr": "gitea_issues_by_label",
"legendFormat": "{{label}}"
"expr": "sort_desc(gitea_issues_by_label)",
"legendFormat": "{{label}}",
"instant": true
}
],
"fieldConfig": {
"defaults": {
"unit": "short",
"decimals": 0,
"color": { "mode": "palette-classic" },
"custom": {
"drawStyle": "line",
"lineWidth": 1,
"fillOpacity": 0,
"showPoints": "never",
"spanNulls": false,
"axisSoftMin": 0
},
"min": 0,
"color": { "mode": "fixed", "fixedColor": "semi-dark-blue" },
"noValue": "no series — check whether the forgejo process restarted since [metrics] last changed; an absent series never says why it is absent"
},
"overrides": []
},
"options": {
"legend": { "displayMode": "list", "placement": "bottom", "showLegend": true, "calcs": [] },
"tooltip": { "mode": "multi", "sort": "desc" }
"orientation": "horizontal",
"displayMode": "basic",
"showUnfilled": true,
"reduceOptions": { "calcs": ["lastNotNull"], "fields": "", "values": false }
}
}
]