Parfii-bot 0be354a920 KeiSeiKit-public — clean state

Single-commit clean baseline after security scrub of niche-tells,
project codenames, internal jargon, and contributor-email leaks.

Contents:
- 100 Rust crates (_primitives/_rust/)
- 37 agent manifests (_manifests/) + generated specs (_generated/)
- 67 user-invocable skills (skills/)
- 33 hooks (hooks/)
- Composition blocks (_blocks/)
- Documentation (docs/, README.md)
- TS adapter packages (_ts_packages/)
- Assembler (_assembler/)
- Roles (_roles/)
- Templates (_templates/)
- Forgejo CI (.forgejo/)

Author: Denis Parfionovich <info@greendragon.info>

License: see LICENSE.

2026-05-01 12:09:03 +08:00

3.2 KiB

Raw Blame History

OBSERVABILITY — Metrics (Prometheus + OTel + RED/USE)

Metrics are numeric time series scraped or pushed on a fixed cadence (10-60 s). Two signal families to cover:

RED (request-driven services — APIs, workers):

Rate — requests per second
Errors — error rate (5xx / failed jobs)
Duration — latency distribution (p50 / p95 / p99)

USE (resources — CPU, memory, disk, network):

Utilization — % busy
Saturation — queue depth / wait time
Errors — hardware / syscall errors

Source: Google SRE Book "Four Golden Signals" [VERIFIED: sre.google/sre-book/monitoring-distributed-systems/] + Brendan Gregg USE [VERIFIED: brendangregg.com/usemethod.html] + Tom Wilkie RED [VERIFIED: thenewstack.io/monitoring-microservices-red-method/].

Metric types (Prometheus model, inherited by OTel):

Type	Use for	Example
Counter	Monotonic cumulative count	`http_requests_total{route, status}`
Gauge	Instantaneous value (up/down)	`queue_depth`, `memory_bytes`
Histogram	Latency / size distribution with buckets	`http_request_duration_seconds_bucket`
Summary	Client-side quantiles (prefer histogram — can aggregate)	— avoid unless Prom-server-side quantile is impossible

Naming convention (Prometheus exposition, OTel convention 1.27+):

Suffix units: _seconds, _bytes, _total for counters [VERIFIED: prometheus.io/docs/practices/naming/]
Lowercase snake_case, dots forbidden in Prom names (OTel dots become underscores on export)
Cardinality budget: < 10 labels per metric, < 100 values per label — runaway cardinality kills Prometheus [VERIFIED: prometheus.io/docs/practices/naming/#labels]

Stack (self-host, single-host or small cluster):

node_exporter on every host (port 9100) — USE metrics for CPU/mem/disk/net [VERIFIED: github.com/prometheus/node_exporter]
App exposes /metrics on app port (Prom client library per language)
Prometheus scrapes every 15 s, retention 15 d local (longer → remote_write to Mimir / Thanos / vendor)
Grafana dashboards connect to Prometheus datasource

OpenTelemetry path (vendor-agnostic, OTLP collector in front):

App uses OTel SDK → OTLP/gRPC (port 4317) or OTLP/HTTP (port 4318) [VERIFIED: opentelemetry.io/docs/specs/otlp/]
OTel Collector receives OTLP, exports to Prometheus remote_write / vendor (Honeycomb, Datadog, Grafana Cloud)
Same collector handles logs + traces (see obs-traces) → single deploy unit

Language bindings:

Rust: metrics + metrics-exporter-prometheus OR opentelemetry-rust [VERIFIED: docs.rs/opentelemetry]
Go: prometheus/client_golang (native Prom) OR go.opentelemetry.io/otel/metric
Python: prometheus-client OR opentelemetry-sdk with opentelemetry-exporter-otlp
Node/TS: prom-client OR @opentelemetry/sdk-metrics

Forbidden: high-cardinality labels (user_id, trace_id, timestamp — never a label); per-request gauges (use histograms); Summary where Histogram works (Summaries don't aggregate across instances); pushing metrics from a long-running service (use /metrics scrape; Pushgateway is for short-lived jobs ONLY per Prom docs); renaming metrics without a deprecation window (breaks dashboards silently).

3.2 KiB Raw Blame History

OBSERVABILITY — Metrics (Prometheus + OTel + RED/USE)

3.2 KiB

Raw Blame History