feat: add route exclusion for health check endpoints#27
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karthikeyangs9 merged 8 commits intomainfrom Mar 30, 2026
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Health check endpoints (/health, /metrics, /ready, etc.) generate noise and inflate trace volume. This adds configurable path exclusion that leverages each OTel middleware's native filter mechanism (WithFilter/ WithSkipper), so excluded paths never create spans. Three-layer matcher (exact, prefix, glob) configured via env vars: - LAST9_EXCLUDED_PATHS (default: /health,/healthz,/metrics,/ready,/live,/ping) - LAST9_EXCLUDED_PATH_PREFIXES (default: none) - LAST9_EXCLUDED_PATH_PATTERNS (default: /*/health,/*/healthz,/*/metrics,/*/ready,/*/live,/*/ping) Set any env var to "" to opt out of its defaults. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Fix fieldalignment (govet) and gofmt issues: - Reorder struct fields for optimal GC pointer scanning - Use named fields in TestIsEmpty struct literals - Run gofmt for consistent formatting Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Document the route exclusion feature including default excluded paths, configuration env vars, usage examples, and matching behavior. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
4 tasks
karthikeyangs9
previously approved these changes
Mar 29, 2026
Move SampleRate and SamplerRatio (float64, non-pointer) after all slice fields so the GC scan range shrinks from 184 to 168 bytes. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…teral
Replace `opts := []T{}` with `var opts []T` in echo, gin, and gorilla
middleware — idiomatic Go for nil-initialized slices that may stay empty.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…ent into feat/route-exclusion-rebased
muktaa
approved these changes
Mar 30, 2026
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Rebased from #10 onto current main (cherry-picked 3 commits cleanly after #11, #13, #14, #21, #25 merged).
Summary
/health,/metrics,/ready, etc.) don't generate trace spansLAST9_EXCLUDED_PATHS,LAST9_EXCLUDED_PATH_PREFIXES,LAST9_EXCLUDED_PATH_PATTERNSenv vars with sensible defaultsWithFilter/WithSkipper) — excluded paths never create spansGetRouteMatcher()public API for middleware authorsDefault excluded paths
LAST9_EXCLUDED_PATHS)/health,/healthz,/metrics,/ready,/live,/pingLAST9_EXCLUDED_PATH_PREFIXES)LAST9_EXCLUDED_PATH_PATTERNS)/*/health,/*/healthz,/*/metrics,/*/ready,/*/live,/*/pingSet any env var to
""to opt out of its defaults.Test plan
internal/routematcher— 22 table-driven tests (exact, prefix, glob, nil receiver, empty, combined, no false positives)config/config_test.go— env var parsing, defaults, opt-out, custom valuesagent_test.go—TestGetRouteMatcherverifies matcher is built from config afterStart()go build ./...andgo vet ./...cleanagent.go(functional options + atomic pointer),config/config.go(SamplerRatio fields),agent_test.go/config/config_test.go(both test suites kept)🤖 Generated with Claude Code