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docs(telemetry): refresh legend-group comment for bracketed label values

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Update the config.alloy metric_statements comment to describe the current
bracket-baked, ", "-joined group-label values ("[node, mainnet]"), matching the
implementation. Comment-only; no behavior change.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Pratik Mankawde
2026-07-14 19:14:37 +01:00
parent f18b03b8ae
commit b4af979a42
1 changed files with 9 additions and 6 deletions
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15
docker/telemetry/alloy/config.alloy
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@@ -175,12 +175,15 @@ otelcol.processor.transform "tier" {
// Grouped legend labels for the Grafana dashboards (kept in sync with the
// reference collector's transform/legendgroups). The Cloud gateway
// promotes these resource attributes to Prometheus labels server-side.
// * resource_group: node id, optionally suffixed with network type.
// * iac_group: perf-iac branch/role/work-item. A generic node like this
// one does not set those attrs, so the guard leaves iac_group unset;
// it is built only on perf-comparison nodes. The guard checks != ""
// as well as != nil because OTTL Concat emits a stray separator for an
// empty element.
// Brackets and ", " separators are baked into the VALUE (e.g.
// "[node, mainnet]") so the dashboard Display name needs no literal
// brackets and an absent group renders as nothing.
// * resource_group: "[node]" or "[node, network]".
// * iac_group: "[branch, role, work-item]". A generic node like this one
// does not set those attrs, so the guard leaves iac_group unset; it is
// built only on perf-comparison nodes. The guard checks != "" as well
// as != nil because OTTL Concat emits "<nil>"/a stray separator for an
// absent or empty element.
`set(attributes["resource_group"], Concat(["[", attributes["service.instance.id"], "]"], "")) where attributes["service.instance.id"] != nil and attributes["service.instance.id"] != ""`,
`set(attributes["resource_group"], Concat(["[", attributes["service.instance.id"], ", ", attributes["xrpl.network.type"], "]"], "")) where attributes["service.instance.id"] != nil and attributes["service.instance.id"] != "" and attributes["xrpl.network.type"] != nil and attributes["xrpl.network.type"] != ""`,
`set(attributes["iac_group"], Concat(["[", Concat([attributes["xrpl.branch"], attributes["xrpl.node.role"], attributes["xrpl.work.item"]], ", "), "]"], "")) where attributes["xrpl.branch"] != nil and attributes["xrpl.branch"] != "" and attributes["xrpl.node.role"] != nil and attributes["xrpl.node.role"] != "" and attributes["xrpl.work.item"] != nil and attributes["xrpl.work.item"] != ""`,