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[feat](observability): add Prometheus metrics and /metrics endpoint

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- Introduced Prometheus metrics tracking for DTLS handshakes, HTTP requests, and proxy errors.
- Defined counters and histograms with labels for detailed observability.
- Registered metrics via `MustRegister` during server initialization.
- Added `/metrics` endpoint protected by host domain filtering.
- Updated HTTP handler to capture request metadata and record metrics.
- Integrated metrics tracking for DTLS handshake processes and various error conditions.
- Updated `go.mod` and `go.sum` with Prometheus client dependencies.
This commit is contained in:
dalbodeule
2025-11-27 14:06:23 +09:00
parent 33d86d522d
commit 5ea992a0df
5 changed files with 191 additions and 25 deletions
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9
go.mod
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@@ -8,6 +8,7 @@ require (
github.com/google/uuid v1.6.0
github.com/lib/pq v1.10.9
github.com/pion/dtls/v3 v3.0.7
github.com/prometheus/client_golang v1.19.0
golang.org/x/net v0.47.0
)
@@ -15,8 +16,10 @@ require (
ariga.io/atlas v0.32.1-0.20250325101103-175b25e1c1b9 // indirect
github.com/agext/levenshtein v1.2.3 // indirect
github.com/apparentlymart/go-textseg/v15 v15.0.0 // indirect
github.com/beorn7/perks v1.0.1 // indirect
github.com/bmatcuk/doublestar v1.3.4 // indirect
github.com/cenkalti/backoff/v5 v5.0.3 // indirect
github.com/cespare/xxhash/v2 v2.2.0 // indirect
github.com/go-jose/go-jose/v4 v4.1.3 // indirect
github.com/go-openapi/inflect v0.19.0 // indirect
github.com/google/go-cmp v0.7.0 // indirect
@@ -25,13 +28,17 @@ require (
github.com/mitchellh/go-wordwrap v1.0.1 // indirect
github.com/pion/logging v0.2.4 // indirect
github.com/pion/transport/v3 v3.0.7 // indirect
github.com/prometheus/client_model v0.5.0 // indirect
github.com/prometheus/common v0.48.0 // indirect
github.com/prometheus/procfs v0.12.0 // indirect
github.com/rogpeppe/go-internal v1.14.1 // indirect
github.com/zclconf/go-cty v1.14.4 // indirect
github.com/zclconf/go-cty-yaml v1.1.0 // indirect
golang.org/x/crypto v0.44.0 // indirect
golang.org/x/crypto v0.45.0 // indirect
golang.org/x/mod v0.29.0 // indirect
golang.org/x/sync v0.18.0 // indirect
golang.org/x/sys v0.38.0 // indirect
golang.org/x/text v0.31.0 // indirect
golang.org/x/tools v0.38.0 // indirect
google.golang.org/protobuf v1.36.10 // indirect
)