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agents board: a busiest-agents table, joined by agent

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Five instant table-format queries, one per column, joined on the agent label,
sorted by turns. Checked in a real Grafana 13 against a mock Prometheus.
This commit is contained in:
iris 2026-11-01 13:21:09 +01:00
commit fec66af1c8
1 changed files with 235 additions and 1 deletions
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25
nix/module-eval/grafana.nix
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@ -453,6 +453,31 @@ let
]
&& lib.all (m: lib.hasInfix "\"${m}\"" recorded) queried;
}
{
# The agents board's busiest-agents table is five instant queries, one per
# column, in table format. Joining them by agent is what makes it one row per
# agent; without the join a table panel shows a frame per query.
name = "the agents dashboard's busiest-agents table joins its queries by agent";
ok =
let
board = builtins.fromJSON (builtins.readFile ../host-modules/swarm-grafana/dashboards/agents.json);
tables = lib.filter (e: e.spec.vizConfig.group == "table") (lib.attrValues board.spec.elements);
table = lib.head tables;
xf = table.spec.data.spec.transformations;
in
lib.length tables == 1
&& table.spec.title == "Busiest agents"
&& lib.length table.spec.data.spec.queries == 5
&& lib.all (
q: q.spec.query.spec.format == "table" && q.spec.query.spec.instant
) table.spec.data.spec.queries
&&
map (t: t.spec.id) xf == [
"joinByField"
"organize"
]
&& (lib.head xf).spec.options.byField == "agent";
}
{
# The egress board ships, and its queries read the two squid log lines as
# squid writes them: the would_deny line's field layout, and the default