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fix(otel): cumulative metric temporality + metricIntervalMs knob (real metrics-export fix)

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This commit is contained in:
damocles 2026-06-24 20:28:37 +02:00
commit af10a4bfef
3 changed files with 64 additions and 10 deletions
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43
nix/templates/harness-base.nix
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@ -250,6 +250,17 @@ in
Host-driven via `services.hyperhive.otel.extraResourceAttributes`.
'';
};
metricIntervalMs = lib.mkOption {
type = lib.types.nullOr lib.types.ints.positive;
default = null;
internal = true;
description = ''
Metric export interval in milliseconds, set as
`OTEL_METRIC_EXPORT_INTERVAL`. Null leaves Claude Code's 60s
default. Host-driven via `services.hyperhive.otel.metricIntervalMs`.
'';
};
};
options.hyperhive.allowedRecipients = lib.mkOption {
@ -1735,16 +1746,28 @@ in
# Claude Code's native OpenTelemetry is env-driven; the harness
# spawns `claude` as a child which inherits this unit's env, so
# setting these here is all it takes to export per-agent stats.
otelEnv = lib.optionalAttrs otel.enable {
CLAUDE_CODE_ENABLE_TELEMETRY = "1";
OTEL_METRICS_EXPORTER = "otlp";
OTEL_LOGS_EXPORTER = "otlp";
# Route traces to OTLP too so any spans Claude Code emits land
# at the configured collector rather than a default exporter.
OTEL_TRACES_EXPORTER = "otlp";
OTEL_EXPORTER_OTLP_PROTOCOL = otel.protocol;
OTEL_EXPORTER_OTLP_ENDPOINT = otel.endpoint;
};
otelEnv = lib.optionalAttrs otel.enable (
{
CLAUDE_CODE_ENABLE_TELEMETRY = "1";
OTEL_METRICS_EXPORTER = "otlp";
OTEL_LOGS_EXPORTER = "otlp";
# Route traces to OTLP too so any spans Claude Code emits land
# at the configured collector rather than a default exporter.
OTEL_TRACES_EXPORTER = "otlp";
OTEL_EXPORTER_OTLP_PROTOCOL = otel.protocol;
OTEL_EXPORTER_OTLP_ENDPOINT = otel.endpoint;
# Force CUMULATIVE metric temporality. Claude Code defaults to
# DELTA, which Prometheus/Mimir-family backends (the common case,
# incl. grafana-lgtm) silently drop unless a deltatocumulative
# processor is wired — so delta = "logs arrive, metrics vanish".
# Cumulative is what those backends ingest natively. Verified:
# a delta export never registers the metric name; cumulative does.
OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE = "cumulative";
}
// lib.optionalAttrs (otel.metricIntervalMs != null) {
OTEL_METRIC_EXPORT_INTERVAL = toString otel.metricIntervalMs;
}
);
# When OTEL is on, wrap the harness launch so (1) the bearer-token
# header is read from the systemd credential at start (never in the
# nix store or argv) and (2) the resource attributes are assembled