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fix(observability): Promtail template uses ToLower (capital T) #51

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Merged
agjs merged 1 commit into from
May 29, 2026
Merged

fix(observability): Promtail template uses ToLower (capital T) #51

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6 changes: 5 additions & 1 deletion infra/compose/compose/promtail/promtail-config.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -83,9 +83,13 @@ scrape_configs:
msg: msg
# Lowercase Pino's level ("INFO" → "info"). Promote as the `level`
# label so Grafana's logs panel auto-colours each line by severity.
# Note: Promtail's template stage exposes Go's strings.ToLower as
# `ToLower` (capital T) — `toLower` from Sprig is NOT registered
# here. Using the lowercase form crashes the container with
# `function "toLower" not defined` at config load.
- template:
source: level
template: '{{ .level | toLower }}'
template: '{{ ToLower .level }}'
- labels:
level:
# High-cardinality correlation IDs go into structured metadata
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