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42 lines
1.8 KiB
Markdown
42 lines
1.8 KiB
Markdown
# Logging Standards (DOCS-OBS-50-003)
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Last updated: 2025-11-25 (Docs Tasks Md.VI)
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## Goals
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- Deterministic, structured logs for all services.
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- Keep tenant safety and redaction guarantees while enabling search, correlation, and offline analysis.
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## Log shape (JSON)
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Required fields:
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- `timestamp` (UTC ISO-8601)
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- `tenant`, `workload` (service name), `env`, `region`, `version`
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- `level` (`debug|info|warn|error|fatal`)
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- `category` (logger/category name), `operation` (verb/action)
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- `trace_id`, `span_id`, `correlation_id` (if external)
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- `message` (concise, no secrets)
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- `status` (`ok|error|fault|throttle`)
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- `error.code`, `error.message` (redacted), `retryable` (bool) when status != ok
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Optional but recommended:
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- `resource` (subject id/purl/path when safe), `http.method`, `http.status_code`, `duration_ms`, `host`, `pid`, `thread`.
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## Redaction rules
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- Never log Authorization headers, tokens, passwords, private keys, full request/response bodies.
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- Redact to `"[redacted]"` and add `redaction.reason` (`secret|pii|policy`).
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- Hash low-cardinality identifiers when needed (`sha256` hex) and mark `hashed=true`.
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## Determinism & offline posture
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- Stable key ordering not required, but field set must be consistent per log type.
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- No external enrichment; rely on bundled metadata (service map, tenant labels).
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- All times UTC; newline-delimited JSON (NDJSON); LF line endings.
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## Sampling & rate limits
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- Info logs rate-limited per component (default 100/s); warn/error/fatal never sampled.
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- Structured audit logs (`category=audit`) are never sampled and must include `actor`, `action`, `target`, `result`.
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## Validation checklist
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- [ ] Required fields present and non-empty.
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- [ ] No secrets/PII; redaction markers recorded.
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- [ ] Correlation fields (`trace_id`, `span_id`) set when spans exist.
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- [ ] Log level matches outcome (errors use warn/error/fatal only).
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