update changelog

Reviewed-on: #2
Co-authored-by: Ryan D McGuire <ryand_mcguire@sweetwater.com>
Co-committed-by: Ryan D McGuire <ryand_mcguire@sweetwater.com>

CHANGELOG.md

@@ -0,0 +1,29 @@
+# v0.12.1
+* feat: Implement custom OpenTelemetry span name formatting for HTTP requests.
+* refactor: Streamline OpenTelemetry handler integration by removing custom wrapper.
+## v0.12.2
+* chore: Update Go module dependencies, including OpenTelemetry, gRPC Gateway, gRPC, and Protobuf.
+* chore: Add new test suites for logging, OpenTelemetry initialization, gRPC server setup, and HTTP server setup.
+* chore: Enhance configuration loading tests to cover file and environment variable sources.
+* chore: Improve config test comparison robustness using JSON marshaling.
+
+# v0.12.0
+* feat: Add support for excluding HTTP request paths from logging using configurable regular expressions.
+
+# v0.11.1:
+* docs: Add comprehensive package-level documentation for the `http` package.
+* docs: Improve documentation for the `InitHTTPServer` function.
+* feat: Introduce specific logging for HTTP 204 (No Content) responses, omitting body logging.
+* fix: Enhance error handling and logging for empty or unreadable HTTP response bodies.
+* chore: Refine HTTP response log messages for improved clarity and consistency.
+* docs: Update documentation for the `Flush` method in `LoggingResponseWriter`
+
+# v0.11.0:
+*   Updated `github.com/prometheus/client_golang` dependency to v1.23.0.
+*   Updated `google.golang.org/grpc` dependency to v1.74.2.
+*   Added a `replace` directive for `github.com/prometheus/otlptranslator`.
+*   Renamed `initOTEL` function to `InitOTEL` and added a check to prevent re-initialization.
+*   Improved `dummyHealthCheck` to ensure a positive random duration.
+*   Added comprehensive package, struct, and function comments across `pkg/app`, `pkg/config`, `pkg/logging`, `pkg/otel`, `pkg/srv/grpc`, and `pkg/srv/http` for improved clarity.
+*   Corrected typos in `TODO.md` for "implementing" and "support".
+*   Added a new item to `TODO.md` for early OpenTelemetry initialization.

TODO.md

@@ -1,11 +1,15 @@
 # TODO
 
+- [ ] Add ability to initialize OTEL early (before app runs)
+- [ ] Spruce up the README
+- [ ] Create generic interface for implementing a service
+- [ ] Create config sample not called demo, so it is more easily reused
 - [ ] Expand config test case to cover GRPC config
 - [ ] Expand tracing
 
 ## Done
 
-- [x] Test and troubleshoot GRPC Gateway supprot
+- [x] Test and troubleshoot GRPC Gateway support
 - [x] Finish implementing GRPC service support
 - [x] Unit tests
 - [x] Pattern for extending config

go.mod

@@ -3,50 +3,62 @@ module gitea.libretechconsulting.com/rmcguire/go-app
 go 1.24.2
 
 require (
+	buf.build/go/protovalidate v0.14.0
 	github.com/caarlos0/env/v11 v11.3.1
 	github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.3.2
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.26.3
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2
-	github.com/prometheus/client_golang v1.22.0
+	github.com/prometheus/client_golang v1.23.0
 	github.com/rs/zerolog v1.34.0
-	github.com/swaggest/jsonschema-go v0.3.73
+	github.com/stretchr/testify v1.11.1
-	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.60.0
+	github.com/swaggest/jsonschema-go v0.3.78
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.60.0
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.63.0
-	go.opentelemetry.io/otel v1.35.0
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.63.0
-	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.35.0
+	go.opentelemetry.io/otel v1.38.0
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.35.0
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.38.0
-	go.opentelemetry.io/otel/exporters/prometheus v0.57.0
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.38.0
-	go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.35.0
+	go.opentelemetry.io/otel/exporters/prometheus v0.60.0
-	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.35.0
+	go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.38.0
-	go.opentelemetry.io/otel/metric v1.35.0
+	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.38.0
-	go.opentelemetry.io/otel/sdk v1.35.0
+	go.opentelemetry.io/otel/metric v1.38.0
-	go.opentelemetry.io/otel/sdk/metric v1.35.0
+	go.opentelemetry.io/otel/sdk v1.38.0
-	go.opentelemetry.io/otel/trace v1.35.0
+	go.opentelemetry.io/otel/sdk/metric v1.38.0
-	google.golang.org/grpc v1.72.0
+	go.opentelemetry.io/otel/trace v1.38.0
+	google.golang.org/grpc v1.75.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
+	buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.8-20250717185734-6c6e0d3c608e.1 // indirect
+	cel.dev/expr v0.24.0 // indirect
+	github.com/antlr4-go/antlr/v4 v4.13.1 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
+	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
-	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/google/cel-go v0.26.1 // indirect
 	github.com/google/uuid v1.6.0 // indirect
+	github.com/grafana/regexp v0.0.0-20240518133315-a468a5bfb3bc // indirect
 	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
-	github.com/prometheus/common v0.63.0 // indirect
+	github.com/prometheus/common v0.65.0 // indirect
-	github.com/prometheus/procfs v0.16.1 // indirect
+	github.com/prometheus/otlptranslator v0.0.2 // indirect
-	github.com/swaggest/refl v1.3.1 // indirect
+	github.com/prometheus/procfs v0.17.0 // indirect
+	github.com/stoewer/go-strcase v1.3.1 // indirect
+	github.com/swaggest/refl v1.4.0 // indirect
 	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.35.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.38.0 // indirect
-	go.opentelemetry.io/proto/otlp v1.6.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.7.1 // indirect
-	golang.org/x/net v0.39.0 // indirect
+	golang.org/x/exp v0.0.0-20250819193227-8b4c13bb791b // indirect
-	golang.org/x/sys v0.32.0 // indirect
+	golang.org/x/net v0.43.0 // indirect
-	golang.org/x/text v0.24.0 // indirect
+	golang.org/x/sys v0.35.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20250428153025-10db94c68c34 // indirect
+	golang.org/x/text v0.28.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20250428153025-10db94c68c34 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20250826171959-ef028d996bc1 // indirect
-	google.golang.org/protobuf v1.36.6 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250826171959-ef028d996bc1 // indirect
+	google.golang.org/protobuf v1.36.8 // indirect
 )

go.sum

@@ -1,3 +1,11 @@
+buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.8-20250717185734-6c6e0d3c608e.1 h1:sjY1k5uszbIZfv11HO2keV4SLhNA47SabPO886v7Rvo=
+buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.8-20250717185734-6c6e0d3c608e.1/go.mod h1:8EQ5GzyGJQ5tEIwMSxCl8RKJYsjCpAwkdcENoioXT6g=
+buf.build/go/protovalidate v0.14.0 h1:kr/rC/no+DtRyYX+8KXLDxNnI1rINz0imk5K44ZpZ3A=
+buf.build/go/protovalidate v0.14.0/go.mod h1:+F/oISho9MO7gJQNYC2VWLzcO1fTPmaTA08SDYJZncA=
+cel.dev/expr v0.24.0 h1:56OvJKSH3hDGL0ml5uSxZmz3/3Pq4tJ+fb1unVLAFcY=
+cel.dev/expr v0.24.0/go.mod h1:hLPLo1W4QUmuYdA72RBX06QTs6MXw941piREPl3Yfiw=
+github.com/antlr4-go/antlr/v4 v4.13.1 h1:SqQKkuVZ+zWkMMNkjy5FZe5mr5WURWnlpmOuzYWrPrQ=
+github.com/antlr4-go/antlr/v4 v4.13.1/go.mod h1:GKmUxMtwp6ZgGwZSva4eWPC5mS6vUAmOABFgjdkM7Nw=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/bool64/dev v0.2.39 h1:kP8DnMGlWXhGYJEZE/J0l/gVBdbuhoPGL+MJG4QbofE=
@@ -6,31 +14,36 @@ github.com/bool64/shared v0.1.5 h1:fp3eUhBsrSjNCQPcSdQqZxxh9bBwrYiZ+zOKFkM0/2E=
 github.com/bool64/shared v0.1.5/go.mod h1:081yz68YC9jeFB3+Bbmno2RFWvGKv1lPKkMP6MHJlPs=
 github.com/caarlos0/env/v11 v11.3.1 h1:cArPWC15hWmEt+gWk7YBi7lEXTXCvpaSdCiZE2X5mCA=
 github.com/caarlos0/env/v11 v11.3.1/go.mod h1:qupehSf/Y0TUTsxKywqRt/vJjN5nz6vauiYEUUr8P4U=
-github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
+github.com/cenkalti/backoff/v5 v5.0.3 h1:ZN+IMa753KfX5hd8vVaMixjnqRZ3y8CuJKRKj1xcsSM=
-github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
+github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2Wg=
 github.com/felixge/httpsnoop v1.0.4/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
-github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
+github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
-github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
 github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
+github.com/google/cel-go v0.26.1 h1:iPbVVEdkhTX++hpe3lzSk7D3G3QSYqLGoHOcEio+UXQ=
+github.com/google/cel-go v0.26.1/go.mod h1:A9O8OU9rdvrK5MQyrqfIxo1a0u4g3sF8KB6PUIaryMM=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/grafana/regexp v0.0.0-20240518133315-a468a5bfb3bc h1:GN2Lv3MGO7AS6PrRoT6yV5+wkrOpcszoIsO4+4ds248=
+github.com/grafana/regexp v0.0.0-20240518133315-a468a5bfb3bc/go.mod h1:+JKpmjMGhpgPL+rXZ5nsZieVzvarn86asRlBg4uNGnk=
 github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.3.2 h1:sGm2vDRFUrQJO/Veii4h4zG2vvqG6uWNkBHSTqXOZk0=
 github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.3.2/go.mod h1:wd1YpapPLivG6nQgbf7ZkG1hhSOXDhhn4MLTknx2aAc=
-github.com/grpc-ecosystem/grpc-gateway/v2 v2.26.3 h1:5ZPtiqj0JL5oKWmcsq4VMaAW5ukBEgSGXEN89zeH1Jo=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2 h1:8Tjv8EJ+pM1xP8mK6egEbD1OgnVTyacbefKhmbLhIhU=
-github.com/grpc-ecosystem/grpc-gateway/v2 v2.26.3/go.mod h1:ndYquD05frm2vACXE1nsccT4oJzjhw2arTS2cpUD1PI=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2/go.mod h1:pkJQ2tZHJ0aFOVEEot6oZmaVEZcRme73eIFmhiVuRWs=
 github.com/iancoleman/orderedmap v0.3.0 h1:5cbR2grmZR/DiVt+VJopEhtVs9YGInGIxAoMJn+Ichc=
 github.com/iancoleman/orderedmap v0.3.0/go.mod h1:XuLcCUkdL5owUCQeF2Ue9uuw1EptkJDkXXS7VoV7XGE=
 github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
@@ -53,14 +66,16 @@ github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8m
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus/client_golang v1.22.0 h1:rb93p9lokFEsctTys46VnV1kLCDpVZ0a/Y92Vm0Zc6Q=
+github.com/prometheus/client_golang v1.23.0 h1:ust4zpdl9r4trLY/gSjlm07PuiBq2ynaXXlptpfy8Uc=
-github.com/prometheus/client_golang v1.22.0/go.mod h1:R7ljNsLXhuQXYZYtw6GAE9AZg8Y7vEW5scdCXrWRXC0=
+github.com/prometheus/client_golang v1.23.0/go.mod h1:i/o0R9ByOnHX0McrTMTyhYvKE4haaf2mW08I+jGAjEE=
 github.com/prometheus/client_model v0.6.2 h1:oBsgwpGs7iVziMvrGhE53c/GrLUsZdHnqNwqPLxwZyk=
 github.com/prometheus/client_model v0.6.2/go.mod h1:y3m2F6Gdpfy6Ut/GBsUqTWZqCUvMVzSfMLjcu6wAwpE=
-github.com/prometheus/common v0.63.0 h1:YR/EIY1o3mEFP/kZCD7iDMnLPlGyuU2Gb3HIcXnA98k=
+github.com/prometheus/common v0.65.0 h1:QDwzd+G1twt//Kwj/Ww6E9FQq1iVMmODnILtW1t2VzE=
-github.com/prometheus/common v0.63.0/go.mod h1:VVFF/fBIoToEnWRVkYoXEkq3R3paCoxG9PXP74SnV18=
+github.com/prometheus/common v0.65.0/go.mod h1:0gZns+BLRQ3V6NdaerOhMbwwRbNh9hkGINtQAsP5GS8=
-github.com/prometheus/procfs v0.16.1 h1:hZ15bTNuirocR6u0JZ6BAHHmwS1p8B4P6MRqxtzMyRg=
+github.com/prometheus/otlptranslator v0.0.2 h1:+1CdeLVrRQ6Psmhnobldo0kTp96Rj80DRXRd5OSnMEQ=
-github.com/prometheus/procfs v0.16.1/go.mod h1:teAbpZRB1iIAJYREa1LsoWUXykVXA1KlTmWl8x/U+Is=
+github.com/prometheus/otlptranslator v0.0.2/go.mod h1:P8AwMgdD7XEr6QRUJ2QWLpiAZTgTE2UYgjlu3svompI=
+github.com/prometheus/procfs v0.17.0 h1:FuLQ+05u4ZI+SS/w9+BWEM2TXiHKsUQ9TADiRH7DuK0=
+github.com/prometheus/procfs v0.17.0/go.mod h1:oPQLaDAMRbA+u8H5Pbfq+dl3VDAvHxMUOVhe0wYB2zw=
 github.com/rogpeppe/go-internal v1.13.1 h1:KvO1DLK/DRN07sQ1LQKScxyZJuNnedQ5/wKSR38lUII=
 github.com/rogpeppe/go-internal v1.13.1/go.mod h1:uMEvuHeurkdAXX61udpOXGD/AzZDWNMNyH2VO9fmH0o=
 github.com/rs/xid v1.6.0/go.mod h1:7XoLgs4eV+QndskICGsho+ADou8ySMSjJKDIan90Nz0=
@@ -68,69 +83,82 @@ github.com/rs/zerolog v1.34.0 h1:k43nTLIwcTVQAncfCw4KZ2VY6ukYoZaBPNOE8txlOeY=
 github.com/rs/zerolog v1.34.0/go.mod h1:bJsvje4Z08ROH4Nhs5iH600c3IkWhwp44iRc54W6wYQ=
 github.com/sergi/go-diff v1.3.1 h1:xkr+Oxo4BOQKmkn/B9eMK0g5Kg/983T9DqqPHwYqD+8=
 github.com/sergi/go-diff v1.3.1/go.mod h1:aMJSSKb2lpPvRNec0+w3fl7LP9IOFzdc9Pa4NFbPK1I=
-github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
+github.com/stoewer/go-strcase v1.3.1 h1:iS0MdW+kVTxgMoE1LAZyMiYJFKlOzLooE4MxjirtkAs=
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pkg/app/app_types.go

@@ -1,3 +1,5 @@
+// Package app provides methods to configure, run, and stop
+// a go-app.
 package app
 
 import (
@@ -11,6 +13,8 @@ import (
 	httpopts "gitea.libretechconsulting.com/rmcguire/go-app/pkg/srv/http/opts"
 )
 
+// App is the main application struct, holding its context, configurations,
+// and various services like HTTP and gRPC.
 type App struct {
 	AppContext    context.Context
 	HTTP          *httpopts.AppHTTP

pkg/app/init.go

@@ -62,7 +62,12 @@ func (a *App) initHTTP(ctx context.Context) error {
 	return err
 }
 
-func (a *App) initOTEL() {
+func (a *App) InitOTEL() {
+	if a.tracer != nil {
+		a.l.Debug().Msg("superfluous call of already configured app otel")
+		return
+	}
+
 	var otelShutdown shutdownFunc
 	a.AppContext, otelShutdown = otel.Init(a.AppContext)
 	a.shutdownFuncs = append(a.shutdownFuncs, otelShutdown)

pkg/app/monitor.go

@@ -27,7 +27,7 @@ func (a *App) monitor() {
 	a.appDone <- nil // Notify app
 }
 
-// Typically invoked when AppContext is done
+// Shutdown is typically invoked when AppContext is done
 // or Server has exited. Not intended to be called
 // manually
 func (a *App) Shutdown() {

pkg/app/run.go

@@ -35,7 +35,7 @@ func (a *App) MustRun() {
 
 	// Start OTEL
 	// Registers a NO-OP provider if not enabled
-	a.initOTEL()
+	a.InitOTEL()
 
 	// With OTEL ready, create an init span to track startup
 	ctx, initSpan := a.tracer.Start(a.AppContext, "init")

pkg/app/schema.go

@@ -6,11 +6,11 @@ import (
 	js "github.com/swaggest/jsonschema-go"
 )
 
-// Generates json schema for app's config.AppConfig
+// Schema generates json schema for app's config.AppConfig
-func (app *App) Schema() ([]byte, error) {
+func (a *App) Schema() ([]byte, error) {
 	r := js.Reflector{}
 
-	s, err := r.Reflect(*app.cfg)
+	s, err := r.Reflect(*a.cfg)
 	if err != nil {
 		return nil, err
 	}
@@ -18,7 +18,7 @@ func (app *App) Schema() ([]byte, error) {
 	return json.MarshalIndent(s, "", "  ")
 }
 
-// Generates json schema for custom config
+// CustomSchema generates json schema for custom config
 // which embeds *config.AppConfig into it
 // Panics if no *config.AppConfig is embedded into custom
 // config type

pkg/app/setup.go

@@ -9,7 +9,7 @@ import (
 	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/logging"
 )
 
-// Helper function to return a context loaded up with
+// MustSetupConfigAndLogging is a helper function to return a context loaded up with
 // config.AppConfig and a logger
 func MustSetupConfigAndLogging(ctx context.Context) context.Context {
 	ctx, err := config.LoadConfig(ctx)
@@ -24,7 +24,7 @@ func MustSetupConfigAndLogging(ctx context.Context) context.Context {
 	return ctx
 }
 
-// Unmarshal config into a custom type
+// MustSetupConfigAndLoggingInto will unmarshal config into a custom type
 // Type MUST include *config.AppConfig
 // Stored in context as *config.AppConfig but can be asserted back
 func MustSetupConfigAndLoggingInto[T any](ctx context.Context, into T) (context.Context, T) {

pkg/app/setup_custom.go

@@ -13,7 +13,7 @@ import (
 	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/config"
 )
 
-// Used to unmarshal config and environment into a custom type
+// MustLoadConfigInto is used to unmarshal config and environment into a custom type
 // that overloads *config.AppConfig. Will perform normal env
 // substitutions for AppConfig, but env overrides for custom type
 // are up to the caller.

pkg/app/setup_test.go

@@ -1,123 +0,0 @@
-package app
-
-import (
-	"bufio"
-	"context"
-	"flag"
-	"io"
-	"os"
-	"regexp"
-	"testing"
-
-	"github.com/rs/zerolog"
-
-	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/config"
-)
-
-func TestMustSetupConfigAndLogging(t *testing.T) {
-	// Configure app and logger
-	type inputs struct {
-		envs map[string]string
-	}
-	type outputs struct {
-		appName        string
-		logLevel       zerolog.Level
-		logRegexChecks []*regexp.Regexp
-	}
-	tests := []struct {
-		name   string
-		inputs inputs
-		want   outputs
-	}{
-		{
-			name: "Test json logging with short timestamp",
-			inputs: inputs{
-				envs: map[string]string{
-					"APP_NAME":            "testapp",
-					"APP_LOG_LEVEL":       "warn",
-					"APP_LOG_FORMAT":      "json",
-					"APP_LOG_TIME_FORMAT": "short",
-				},
-			},
-			want: outputs{
-				appName:  "testapp",
-				logLevel: zerolog.WarnLevel,
-				logRegexChecks: []*regexp.Regexp{
-					regexp.MustCompile(`^\{.*time":"\d{1,}:\d{2}`),
-				},
-			},
-		},
-		{
-			name: "Test json logging with unix timestamp",
-			inputs: inputs{
-				envs: map[string]string{
-					"APP_NAME":            "testapp",
-					"APP_LOG_LEVEL":       "info",
-					"APP_LOG_FORMAT":      "json",
-					"APP_LOG_TIME_FORMAT": "unix",
-				},
-			},
-			want: outputs{
-				appName:  "testapp",
-				logLevel: zerolog.InfoLevel,
-				logRegexChecks: []*regexp.Regexp{
-					regexp.MustCompile(`time":\d+,`),
-				},
-			},
-		},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			// Set environment variables
-			for key, val := range tt.inputs.envs {
-				os.Setenv(key, val)
-			}
-
-			// Prepare config in context
-			ctx := MustSetupConfigAndLogging(context.Background())
-
-			// Retrieve config and logger from prepared context
-			cfg := config.MustFromCtx(ctx)
-			logger := zerolog.Ctx(ctx)
-
-			// Check wants
-			if cfg.Name != tt.want.appName {
-				t.Errorf("Expected app name %s, got %s", tt.want.appName, cfg.Name)
-			}
-			if logger.GetLevel() != tt.want.logLevel {
-				t.Errorf("Expected log level %#v, got %#v", tt.want.logLevel, logger.GetLevel())
-			}
-
-			// Send and capture a log
-			r, w := io.Pipe()
-			testLogger := logger.Output(w)
-			scanner := bufio.NewScanner(r)
-
-			go func() {
-				testLogger.Error().Msg("test message")
-				w.Close()
-			}()
-
-			logOut := make([]byte, 0)
-			if scanner.Scan() {
-				logOut = scanner.Bytes()
-			}
-
-			// Check all expressions
-			for _, expr := range tt.want.logRegexChecks {
-				if !expr.Match(logOut) {
-					t.Errorf("Regex %s did not match log %s", expr.String(), logOut)
-				}
-			}
-
-			// Super annoying need to reset due to app framework package
-			// using flag.Parse() and go test also using it
-			testlog := flag.Lookup("test.testlogfile").Value.String()
-			flag.CommandLine = flag.NewFlagSet(os.Args[0], flag.ExitOnError)
-			flag.String("test.testlogfile", testlog, "")
-			flag.String("test.paniconexit0", "", "")
-			flag.String("test.v", "", "")
-			flag.Parse()
-		})
-	}
-}

pkg/config/config.go

@@ -1,3 +1,7 @@
+// Package config provides types and methods for managing
+// app config. A go-app configuration can be extended by any type
+// that embeds AppConfig, and has helpers to generate json
+// schema merged with the custom type's fields
 package config
 
 import (
@@ -6,6 +10,7 @@ import (
 	"flag"
 	"fmt"
 	"os"
+	"regexp"
 	"runtime/debug"
 	"time"
 
@@ -13,15 +18,15 @@ import (
 	"gopkg.in/yaml.v3"
 )
 
-// To be set by ldflags in go build command or
+// Version is to be set by ldflags in go build command or
-// retrieved from build meta below
+// retrieved from build meta below.
 var Version = "(devel)"
 
-// Calling this will try to load from config if -config is
+// LoadConfig will try to load from config if -config is
 // provided as a file, and will apply any environment overrides
 // on-top of configuration defaults.
 // Config is stored in returned context, and can be retrieved
-// using config.FromCtx(ctx)
+// using config.FromCtx(ctx).
 func LoadConfig(ctx context.Context) (context.Context, error) {
 	configPath := flag.String("config", "", "Path to the configuration file")
 	flag.Parse()
@@ -40,6 +45,8 @@ func LoadConfig(ctx context.Context) (context.Context, error) {
 	return ctx, nil
 }
 
+// loadConfig loads the application configuration from the specified path,
+// applying environment variable overrides.
 func loadConfig(configPath string) (*AppConfig, error) {
 	cfg := *DefaultConfig
 
@@ -69,6 +76,8 @@ func loadConfig(configPath string) (*AppConfig, error) {
 	return &cfg, nil
 }
 
+// prepareConfig enriches and validates the AppConfig, parsing duration strings
+// for HTTP timeouts.
 func prepareConfig(cfg *AppConfig) error {
 	var errs error
 
@@ -97,15 +106,23 @@ func prepareConfig(cfg *AppConfig) error {
 		}
 	}
 
+	// Prepare user-provided expressions, panic up-front if invalid
+	cfg.HTTP.excludeRegexps = make([]*regexp.Regexp, len(cfg.HTTP.LogExcludePathRegexps))
+	for i, re := range cfg.HTTP.LogExcludePathRegexps {
+		cfg.HTTP.excludeRegexps[i] = regexp.MustCompile(re)
+	}
+
 	return errs
 }
 
-// Returns read timeout, write timeout, and idle timeout, in that order
+// Timeouts returns read timeout, write timeout, and idle timeout, in that order.
-// nil if unset
+// Returns nil if unset.
 func (h *HTTPConfig) Timeouts() (*time.Duration, *time.Duration, *time.Duration) {
 	return h.rT, h.wT, h.iT
 }
 
+// getVersion returns the application version, preferring the build info version
+// over the compile-time set Version variable.
 func getVersion() string {
 	if info, ok := debug.ReadBuildInfo(); ok && info.Main.Version != "(devel)" {
 		return info.Main.Version

pkg/config/config_test.go

@@ -2,6 +2,7 @@ package config
 
 import (
 	"encoding/json"
+	"os"
 	"testing"
 )
 
@@ -61,9 +62,110 @@ func Test_loadConfig(t *testing.T) {
 			want:    testDefaultConfig,
 			wantErr: false,
 		},
+		{
+			name: "Load from file",
+			args: args{configPath: "./testdata/config.yaml"},
+			want: &AppConfig{
+				Name:        "test-app",
+				Environment: "development",
+				Version:     getVersion(),
+				Logging: &LogConfig{
+					Enabled:    true,
+					Level:      "debug",
+					Format:     LogFormatJSON,
+					Output:     "stderr",
+					TimeFormat: TimeFormatLong,
+				},
+				HTTP: &HTTPConfig{
+					Enabled:      true,
+					Listen:       "127.0.0.1:9090",
+					LogRequests:  false,
+					ReadTimeout:  "10s",
+					WriteTimeout: "10s",
+					IdleTimeout:  "1m",
+				},
+				GRPC: &GRPCConfig{
+					Enabled:               false,
+					Listen:                "127.0.0.1:8081",
+					LogRequests:           false,
+					EnableReflection:      true,
+					EnableInstrumentation: true,
+				},
+				OTEL: &OTELConfig{
+					Enabled:            true,
+					PrometheusEnabled:  true,
+					PrometheusPath:     "/metrics",
+					StdoutEnabled:      false,
+					MetricIntervalSecs: 30,
+				},
+			},
+		},
+		{
+			name: "Load from env",
+			args: args{configPath: ""},
+			want: &AppConfig{
+				Name:        "test-app-env",
+				Environment: "production",
+				Version:     getVersion(),
+				Logging: &LogConfig{
+					Enabled:    false,
+					Level:      "error",
+					Format:     LogFormatConsole,
+					Output:     "stdout",
+					TimeFormat: TimeFormatUnix,
+				},
+				HTTP: &HTTPConfig{
+					Enabled:      false,
+					Listen:       "0.0.0.0:80",
+					LogRequests:  true,
+					ReadTimeout:  "15s",
+					WriteTimeout: "15s",
+					IdleTimeout:  "2m",
+				},
+				GRPC: &GRPCConfig{
+					Enabled:               true,
+					Listen:                "0.0.0.0:443",
+					LogRequests:           true,
+					EnableReflection:      false,
+					EnableInstrumentation: false,
+				},
+				OTEL: &OTELConfig{
+					Enabled:            false,
+					PrometheusEnabled:  false,
+					PrometheusPath:     "/metricsz",
+					StdoutEnabled:      true,
+					MetricIntervalSecs: 60,
+				},
+			},
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			if tt.name == "Load from env" {
+				os.Setenv("APP_NAME", "test-app-env")
+				os.Setenv("APP_ENVIRONMENT", "production")
+				os.Setenv("APP_LOG_ENABLED", "false")
+				os.Setenv("APP_LOG_LEVEL", "error")
+				os.Setenv("APP_LOG_FORMAT", "console")
+				os.Setenv("APP_LOG_OUTPUT", "stdout")
+				os.Setenv("APP_LOG_TIME_FORMAT", "unix")
+				os.Setenv("APP_HTTP_ENABLED", "false")
+				os.Setenv("APP_HTTP_LISTEN", "0.0.0.0:80")
+				os.Setenv("APP_HTTP_LOG_REQUESTS", "true")
+				os.Setenv("APP_HTTP_READ_TIMEOUT", "15s")
+				os.Setenv("APP_HTTP_WRITE_TIMEOUT", "15s")
+				os.Setenv("APP_HTTP_IDLE_TIMEOUT", "2m")
+				os.Setenv("APP_GRPC_ENABLED", "true")
+				os.Setenv("APP_GRPC_LISTEN", "0.0.0.0:443")
+				os.Setenv("APP_GRPC_LOG_REQUESTS", "true")
+				os.Setenv("APP_GRPC_ENABLE_REFLECTION", "false")
+				os.Setenv("APP_GRPC_ENABLE_INSTRUMENTATION", "false")
+				os.Setenv("APP_OTEL_ENABLED", "false")
+				os.Setenv("APP_OTEL_PROMETHEUS_ENABLED", "false")
+				os.Setenv("APP_OTEL_PROMETHEUS_PATH", "/metricsz")
+				os.Setenv("APP_OTEL_STDOUT_ENABLED", "true")
+				os.Setenv("APP_OTEL_METRIC_INTERVAL_SECS", "60")
+			}
 			got, err := loadConfig(tt.args.configPath)
 			if (err != nil) != tt.wantErr {
 				t.Errorf("loadConfig() error = %v, wantErr %v", err, tt.wantErr)

pkg/config/ctx.go

@@ -9,10 +9,12 @@ type appConfigKey uint8
 
 const appConfigCtxKey appConfigKey = iota
 
-func (a *AppConfig) AddToCtx(ctx context.Context) context.Context {
+// AddToCtx adds the AppConfig to the provided context.
-	return context.WithValue(ctx, appConfigCtxKey, a)
+func (ac *AppConfig) AddToCtx(ctx context.Context) context.Context {
+	return context.WithValue(ctx, appConfigCtxKey, ac)
 }
 
+// MustFromCtx retrieves the AppConfig from the context, or panics if not found.
 func MustFromCtx(ctx context.Context) *AppConfig {
 	cfg, err := FromCtx(ctx)
 	if err != nil {
@@ -21,6 +23,7 @@ func MustFromCtx(ctx context.Context) *AppConfig {
 	return cfg
 }
 
+// FromCtx retrieves the AppConfig from the context.
 func FromCtx(ctx context.Context) (*AppConfig, error) {
 	ctxData := ctx.Value(appConfigCtxKey)
 	if ctxData == nil {

pkg/config/testdata/config.yaml

@@ -0,0 +1,5 @@
+name: test-app
+logging:
+  level: debug
+http:
+  listen: "127.0.0.1:9090"

pkg/config/types.go

@@ -1,6 +1,6 @@
 package config
 
-// Default Settings
+// DefaultConfig provides a default application configuration.
 var DefaultConfig = &AppConfig{
 	Environment: "development",
 	Version:     getVersion(),
@@ -23,6 +23,7 @@ type AppConfig struct {
 	GRPC    *GRPCConfig `yaml:"grpc,omitempty" json:"grpc,omitempty"`
 }
 
+// HTTPEnabled returns true if HTTP is enabled in the AppConfig.
 func (ac *AppConfig) HTTPEnabled() bool {
 	if ac.HTTP != nil && ac.HTTP.Enabled {
 		return true
@@ -30,6 +31,7 @@ func (ac *AppConfig) HTTPEnabled() bool {
 	return false
 }
 
+// GRPCEnabled returns true if gRPC is enabled in the AppConfig.
 func (ac *AppConfig) GRPCEnabled() bool {
 	if ac.GRPC != nil && ac.GRPC.Enabled {
 		return true
@@ -37,6 +39,7 @@ func (ac *AppConfig) GRPCEnabled() bool {
 	return false
 }
 
+// OTELEnabled returns true if OpenTelemetry is enabled in the AppConfig.
 func (ac *AppConfig) OTELEnabled() bool {
 	if ac.OTEL != nil && ac.OTEL.Enabled {
 		return true

pkg/config/types_grpc.go

@@ -13,6 +13,7 @@ type GRPCConfig struct {
 	Enabled               bool   `yaml:"enabled" env:"APP_GRPC_ENABLED" json:"enabled,omitempty"`
 	Listen                string `yaml:"listen" env:"APP_GRPC_LISTEN" json:"listen,omitempty"`
 	LogRequests           bool   `yaml:"logRequests" env:"APP_GRPC_LOG_REQUESTS" json:"logRequests,omitempty"`
+	EnableProtovalidate   bool   `yaml:"enableProtovalidate" env:"APP_GRPC_ENABLE_PROTOVALIDATE" json:"enableProtovalidate,omitempty" default:"false" description:"Add a chain unary and streaming interceptor for buf.build/go/protovalidate"`
 	EnableReflection      bool   `yaml:"enableReflection" env:"APP_GRPC_ENABLE_REFLECTION" json:"enableReflection,omitempty"`
 	EnableInstrumentation bool   `yaml:"enableInstrumentation" env:"APP_GRPC_ENABLE_INSTRUMENTATION" json:"enableInstrumentation,omitempty"` // requires OTEL
 	EnableGRPCGateway     bool   `yaml:"enableGRPCGateway" json:"enableGRPCGateway,omitempty" env:"APP_GRPC_ENABLE_GATEWAY" default:"true"`

pkg/config/types_http.go

@@ -1,6 +1,10 @@
 package config
 
-import "time"
+import (
+	"regexp"
+	"sync"
+	"time"
+)
 
 var defaultHTTPConfig = &HTTPConfig{
 	Enabled: true,
@@ -12,15 +16,25 @@ var defaultHTTPConfig = &HTTPConfig{
 	IdleTimeout:  "1m",
 }
 
-// HTTP Configuration
+// HTTPConfig provides HTTP server Configuration
 type HTTPConfig struct {
 	Enabled               bool     `yaml:"enabled" env:"APP_HTTP_ENABLED" json:"enabled,omitempty"`
 	Listen                string   `yaml:"listen,omitempty" env:"APP_HTTP_LISTEN" json:"listen,omitempty"`
 	LogRequests           bool     `yaml:"logRequests" env:"APP_HTTP_LOG_REQUESTS" json:"logRequests,omitempty"`
+	LogExcludePathRegexps []string `yaml:"logExcludePathRegexps" env:"APP_HTTP_LOG_EXCLUDE_PATH_REGEXPS" json:"logExcludePathRegexps,omitempty"`
 	ReadTimeout           string   `yaml:"readTimeout" env:"APP_HTTP_READ_TIMEOUT" json:"readTimeout,omitempty"`    // Go duration (e.g. 10s)
 	WriteTimeout          string   `yaml:"writeTimeout" env:"APP_HTTP_WRITE_TIMEOUT" json:"writeTimeout,omitempty"` // Go duration (e.g. 10s)
 	IdleTimeout           string   `yaml:"idleTimeout" env:"APP_HTTP_IDLE_TIMEOUT" json:"idleTimeout,omitempty"`    // Go duration (e.g. 10s)
+	excludeRegexps        []*regexp.Regexp
 	rT                    *time.Duration
 	wT                    *time.Duration
 	iT                    *time.Duration
+	lock                  sync.RWMutex
+}
+
+func (h *HTTPConfig) GetExcludeRegexps() []*regexp.Regexp {
+	h.lock.RLock()
+	defer h.lock.RUnlock()
+
+	return h.excludeRegexps
 }

pkg/config/types_logging.go

@@ -8,7 +8,7 @@ var defaultLoggingConfig = &LogConfig{
 	TimeFormat: TimeFormatLong,
 }
 
-// Logging Configuration
+// LogConfig provides Logging Configuration
 type LogConfig struct {
 	Enabled    bool       `yaml:"enabled,omitempty" env:"APP_LOG_ENABLED" json:"enabled,omitempty"`
 	Level      string     `yaml:"level,omitempty" env:"APP_LOG_LEVEL" json:"level,omitempty"`

pkg/config/types_otel.go

@@ -8,7 +8,7 @@ var defaultOTELConfig = &OTELConfig{
 	MetricIntervalSecs: 30,
 }
 
-// OTEL Configuration
+// OtelConfig provides OTEL Configuration
 type OTELConfig struct {
 	Enabled            bool   `yaml:"enabled,omitempty" env:"APP_OTEL_ENABLED" json:"enabled,omitempty"`
 	PrometheusEnabled  bool   `yaml:"prometheusEnabled,omitempty" env:"APP_OTEL_PROMETHEUS_ENABLED" json:"prometheusEnabled,omitempty"`

pkg/logging/logging.go

@@ -1,3 +1,5 @@
+// Package logging provides a centralized logging utility using zerolog,
+// with configurable output formats and log levels.
 package logging
 
 import (

pkg/logging/logging_test.go

@@ -0,0 +1,133 @@
+
+package logging
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"io"
+	"os"
+	"testing"
+
+	"github.com/rs/zerolog"
+	"github.com/stretchr/testify/assert"
+
+	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/config"
+)
+
+func TestMustInitLogging(t *testing.T) {
+	cfg := &config.AppConfig{
+		Logging: &config.LogConfig{
+			Level:  "info",
+			Format: "json",
+		},
+	}
+	ctx := cfg.AddToCtx(context.Background())
+
+	ctx = MustInitLogging(ctx)
+	logger := zerolog.Ctx(ctx)
+
+	assert.NotNil(t, logger)
+	assert.Equal(t, zerolog.InfoLevel, logger.GetLevel())
+}
+
+func TestConfigureLogger(t *testing.T) {
+	type args struct {
+		cfg *config.LogConfig
+	}
+	tests := []struct {
+		name      string
+		args      args
+		level     zerolog.Level
+		wantJSON  bool
+		wantTime  bool
+		assertion func(t *testing.T, output string)
+	}{
+		{
+			name: "json logger",
+			args: args{
+				cfg: &config.LogConfig{
+					Level:  "debug",
+					Format: "json",
+				},
+			},
+			level:    zerolog.DebugLevel,
+			wantJSON: true,
+		},
+		{
+			name: "console logger",
+			args: args{
+				cfg: &config.LogConfig{
+					Level:  "warn",
+					Format: "console",
+				},
+			},
+			level:    zerolog.WarnLevel,
+			wantJSON: false,
+		},
+		{
+			name: "with time",
+			args: args{
+				cfg: &config.LogConfig{
+					Level:      "info",
+					Format:     "json",
+					TimeFormat: "unix",
+				},
+			},
+			level:    zerolog.InfoLevel,
+			wantJSON: true,
+			wantTime: true,
+			assertion: func(t *testing.T, output string) {
+				var log map[string]interface{}
+				err := json.Unmarshal([]byte(output), &log)
+				assert.NoError(t, err)
+				assert.Contains(t, log, "time")
+			},
+		},
+		{
+			name: "without time",
+			args: args{
+				cfg: &config.LogConfig{
+					Level:      "info",
+					Format:     "json",
+					TimeFormat: "off",
+				},
+			},
+			level:    zerolog.InfoLevel,
+			wantJSON: true,
+			wantTime: false,
+			assertion: func(t *testing.T, output string) {
+				var log map[string]interface{}
+				err := json.Unmarshal([]byte(output), &log)
+				assert.NoError(t, err)
+				assert.NotContains(t, log, "time")
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			// Capture output
+			old := os.Stderr
+			r, w, _ := os.Pipe()
+			os.Stderr = w
+
+			logger, err := configureLogger(tt.args.cfg)
+			assert.NoError(t, err)
+			assert.Equal(t, tt.level, logger.GetLevel())
+
+			logger.Info().Msg("test")
+
+			w.Close()
+			os.Stderr = old
+
+			var buf bytes.Buffer
+			io.Copy(&buf, r)
+
+			output := buf.String()
+
+			if tt.assertion != nil {
+				tt.assertion(t, output)
+			}
+		})
+	}
+}

pkg/otel/otel.go

@@ -1,3 +1,4 @@
+// Package otel provides OpenTelemetry initialization and configuration for tracing and metrics.
 package otel
 
 import (
@@ -39,6 +40,7 @@ var (
 
 const defMetricInterval = 15 * time.Second
 
+// Init prepares otel, loading a tracer and meter stored in appp context.
 // Context must carry config.AppConfig
 func Init(ctx context.Context) (context.Context, func(context.Context) error) {
 	cfg := config.MustFromCtx(ctx)
@@ -232,7 +234,7 @@ func (s *settings) newMeterProvider(ctx context.Context) (*metric.MeterProvider,
 	return meterProvider, nil
 }
 
-// Creates a new tracer from the global opentelemetry provider
+// NewTracer creates a new tracer from the global opentelemetry provider
 func NewTracer(options ...trace.TracerOption) trace.Tracer {
 	return opentelemetry.GetTracerProvider().Tracer(
 		os.Getenv("OTEL_SERVICE_NAME"),

pkg/otel/otel_test.go

@@ -0,0 +1,66 @@
+
+package otel
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"go.opentelemetry.io/otel/metric/noop"
+	"go.opentelemetry.io/otel/trace"
+
+	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/config"
+)
+
+func TestInit(t *testing.T) {
+	cfg := &config.AppConfig{
+		Name: "test-app",
+		OTEL: &config.OTELConfig{
+			Enabled: true,
+		},
+	}
+	ctx := cfg.AddToCtx(context.Background())
+
+	ctx, shutdown := Init(ctx)
+	defer shutdown(context.Background())
+
+	assert.NotNil(t, ctx.Value(ctxKeyTracer))
+	assert.NotNil(t, ctx.Value(ctxKeyMeter))
+}
+
+func TestInit_Disabled(t *testing.T) {
+	cfg := &config.AppConfig{
+		Name: "test-app",
+		OTEL: &config.OTELConfig{
+			Enabled: false,
+		},
+	}
+	ctx := cfg.AddToCtx(context.Background())
+
+	ctx, shutdown := Init(ctx)
+	defer shutdown(context.Background())
+
+	assert.NotNil(t, ctx.Value(ctxKeyTracer))
+	assert.NotNil(t, ctx.Value(ctxKeyMeter))
+}
+
+func TestContextFuncs(t *testing.T) {
+	tracer := trace.NewNoopTracerProvider().Tracer("test")
+	meter := noop.NewMeterProvider().Meter("test")
+
+	ctx := context.Background()
+	ctx = AddTracerToCtx(ctx, tracer)
+	ctx = AddMeterToCtx(ctx, meter)
+
+	assert.Equal(t, tracer, MustTracerFromCtx(ctx))
+	assert.Equal(t, meter, MustMeterFromCtx(ctx))
+}
+
+func TestContextFuncs_Panic(t *testing.T) {
+	assert.Panics(t, func() {
+		MustTracerFromCtx(context.Background())
+	})
+	assert.Panics(t, func() {
+		MustMeterFromCtx(context.Background())
+	})
+}

pkg/srv/grpc/grpc.go

@@ -1,3 +1,5 @@
+// Package grpc provides a gRPC server implementation with OpenTelemetry integration
+// and gRPC Gateway for RESTful API exposure.
 package grpc
 
 import (
@@ -29,8 +31,9 @@ type appGRPCServer struct {
 	doneChan     chan error
 }
 
-// Returns a shutdown func, a channel indicating done / error,
+// InitGRPCServer initializes and starts a gRPC server.
-// and an up-front error if server fails to start
+// It returns a shutdown function, a channel to signal completion or error,
+// and an error if the server fails to start.
 func InitGRPCServer(ctx context.Context, opts *opts.GRPCOpts) (
 	func(context.Context) error, <-chan error, error,
 ) {

pkg/srv/grpc/grpc_test.go

@@ -0,0 +1,111 @@
+
+package grpc
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"google.golang.org/grpc"
+
+	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/config"
+	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/otel"
+	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/srv/grpc/opts"
+)
+
+// Mock gRPC service
+type mockService struct{}
+
+type MockServiceServer interface {
+	TestMethod(context.Context, *mockRequest) (*mockResponse, error)
+}
+
+type mockRequest struct{}
+type mockResponse struct{}
+
+func (s *mockService) TestMethod(ctx context.Context, req *mockRequest) (*mockResponse, error) {
+	return &mockResponse{}, nil
+}
+
+var _MockService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "test.MockService",
+	HandlerType: (*MockServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "TestMethod",
+			Handler: func(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+				in := new(mockRequest)
+				if err := dec(in); err != nil {
+					return nil, err
+				}
+				if interceptor == nil {
+					return srv.(MockServiceServer).TestMethod(ctx, in)
+				}
+				info := &grpc.UnaryServerInfo{
+					Server:     srv,
+					FullMethod: "/test.MockService/TestMethod",
+				}
+				handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+					return srv.(MockServiceServer).TestMethod(ctx, req.(*mockRequest))
+				}
+				return interceptor(ctx, in, info, handler)
+			},
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "mock.proto",
+}
+
+func TestInitGRPCServer(t *testing.T) {
+	cfg := &config.AppConfig{
+		Name: "test-app",
+		GRPC: &config.GRPCConfig{
+			Enabled: true,
+			Listen:  "127.0.0.1:0", // Use random available port
+		},
+	}
+	ctx := cfg.AddToCtx(context.Background())
+	ctx, _ = otel.Init(ctx)
+
+	grpcOpts := &opts.GRPCOpts{
+		GRPCConfig: cfg.GRPC,
+		AppGRPC: &opts.AppGRPC{
+			Services: []*opts.GRPCService{
+				{
+					Name:    "mock",
+					Type:    &_MockService_serviceDesc,
+					Service: &mockService{},
+				},
+			},
+		},
+	}
+
+	shutdown, done, err := InitGRPCServer(ctx, grpcOpts)
+	assert.NoError(t, err)
+	assert.NotNil(t, shutdown)
+	assert.NotNil(t, done)
+
+	// Shutdown the server
+	err = shutdown(context.Background())
+	assert.NoError(t, err)
+}
+
+func TestInitGRPCServer_NoServices(t *testing.T) {
+	cfg := &config.AppConfig{
+		Name: "test-app",
+		GRPC: &config.GRPCConfig{
+			Enabled: true,
+			Listen:  "127.0.0.1:0",
+		},
+	}
+	ctx := cfg.AddToCtx(context.Background())
+	ctx, _ = otel.Init(ctx)
+
+	grpcOpts := &opts.GRPCOpts{
+		GRPCConfig: cfg.GRPC,
+		AppGRPC:    &opts.AppGRPC{},
+	}
+
+	_, _, err := InitGRPCServer(ctx, grpcOpts)
+	assert.Error(t, err)
+}

pkg/srv/grpc/logger.go

@@ -8,19 +8,19 @@ import (
 	"github.com/rs/zerolog/log"
 )
 
-// A grpc logging middleware compatible logger
+// GRPCLogger is a grpc logging middleware compatible logger
 // implementation using a zerolog logger, either from
-// the global logger or a context logger
+// the global logger or a context logger.
 type GRPCLogger struct {
 	logger zerolog.Logger
 }
 
-// Returns a grpcLogger using the global zerolog Logger
+// NewGRPCLogger returns a grpcLogger using the global zerolog Logger.
 func NewGRPCLogger() *GRPCLogger {
 	return &GRPCLogger{logger: log.Logger}
 }
 
-// Returns a grpcLogger using the zerolog logger in the provided context
+// NewGRPCContextLogger returns a grpcLogger using the zerolog logger in the provided context.
 func NewGRPCContextLogger(ctx context.Context) *GRPCLogger {
 	logger := log.Ctx(ctx)
 	return &GRPCLogger{logger: *logger}

pkg/srv/grpc/prepare.go

@@ -4,7 +4,9 @@ import (
 	"context"
 	"errors"
 
+	"buf.build/go/protovalidate"
 	grpclogging "github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/logging"
+	protovalidate_middleware "github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/protovalidate"
 	"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/attribute"
@@ -29,6 +31,7 @@ func (a *appGRPCServer) prepGRPCServer(spanCtx context.Context) error {
 	// Prepare GRPC Server Opts
 	a.prepareOTEL(ctx)
 	a.prepareLogging(ctx)
+	a.prepareProtovalidate(ctx)
 
 	// Chain interceptors for unary RPCs
 	a.serverOpts = append(a.serverOpts,
@@ -69,6 +72,28 @@ func (a *appGRPCServer) prepGRPCServer(spanCtx context.Context) error {
 	return nil
 }
 
+// prepareProtovalidate() adds interceptors for buf.build protovalidate
+func (a *appGRPCServer) prepareProtovalidate(spanCtx context.Context) {
+	_, span := a.tracer.Start(spanCtx, "appgrpc.init.prepare.protovalidate", trace.WithAttributes(
+		attribute.Bool("grpc.server.protovalidate", a.opts.EnableProtovalidate)))
+	defer span.End()
+
+	if !a.opts.EnableProtovalidate {
+		return
+	}
+
+	validator, err := protovalidate.New()
+	if err != nil {
+		span.RecordError(err)
+	}
+
+	a.opts.UnaryInterceptors = append(a.opts.UnaryInterceptors,
+		protovalidate_middleware.UnaryServerInterceptor(validator))
+
+	a.opts.StreamInterceptors = append(a.opts.StreamInterceptors,
+		protovalidate_middleware.StreamServerInterceptor(validator))
+}
+
 func (a *appGRPCServer) prepareOTEL(spanCtx context.Context) {
 	_, span := a.tracer.Start(spanCtx, "appgrpc.init.prepare.otel", trace.WithAttributes(
 		attribute.Bool("grpc.server.instrumented", a.opts.EnableInstrumentation)))

pkg/srv/http/http.go

@@ -1,3 +1,6 @@
+// Package http provides functionality for setting up and managing HTTP servers.
+// It includes features for health checks, Prometheus metrics, OpenTelemetry
+// tracing, and custom middleware integration.
 package http
 
 import (
@@ -7,6 +10,7 @@ import (
 	"net"
 	"net/http"
 	"os"
+	"regexp"
 	"strings"
 	"time"
 
@@ -24,6 +28,7 @@ import (
 var (
 	httpMeter                   metric.Meter
 	httpTracer                  trace.Tracer
+	httpPatternWithMethodRegexp = regexp.MustCompile(`(\w+) .*`)
 	defReadTimeout              = 10 * time.Second
 	defWriteTimeout             = 10 * time.Second
 	defIdleTimeout              = 15 * time.Second
@@ -36,19 +41,12 @@ func prepHTTPServer(opts *opts.AppHTTP) *http.Server {
 		mux = &http.ServeMux{}
 	)
 
-	// NOTE: Wraps handle func with otelhttp handler and
-	// inserts route tag
-	otelHandleFunc := func(pattern string, handlerFunc func(http.ResponseWriter, *http.Request)) {
-		handler := otelhttp.WithRouteTag(pattern, http.HandlerFunc(handlerFunc))
-		mux.Handle(pattern, handler) // Associate pattern with handler
-	}
-
 	healthChecks := handleHealthCheckFunc(opts.Ctx, opts.HealthChecks...)
-	otelHandleFunc("/health", healthChecks)
+	mux.HandleFunc("/health", healthChecks)
-	otelHandleFunc("/", healthChecks)
+	mux.HandleFunc("/", healthChecks)
 
 	for _, f := range opts.Funcs {
-		otelHandleFunc(f.Path, f.HandlerFunc)
+		mux.HandleFunc(f.Path, f.HandlerFunc)
 	}
 
 	// Prometheus metrics endpoint
@@ -71,12 +69,12 @@ func prepHTTPServer(opts *opts.AppHTTP) *http.Server {
 		if h.StripPrefix {
 			h.Handler = http.StripPrefix(h.Prefix[:len(h.Prefix)-1], h.Handler)
 		}
-		mux.Handle(h.Prefix, h.Handler)
+		mux.Handle(h.Prefix, otelhttp.WithRouteTag(h.Prefix, h.Handler))
 	}
 
-	// Add OTEL, skip health-check spans
+	// Add OTEL instrumentation, filter noise, set span names
-	// NOTE: Add any other span exclusions here
 	handler := otelhttp.NewHandler(mux, "/",
+		// TODO: Make configurable similar to config.http.LogExcludePathRegexps
 		otelhttp.WithFilter(func(r *http.Request) bool {
 			switch r.URL.Path {
 			case "/health":
@@ -86,6 +84,18 @@ func prepHTTPServer(opts *opts.AppHTTP) *http.Server {
 			default:
 				return true
 			}
+		}),
+		otelhttp.WithSpanNameFormatter(func(operation string, r *http.Request) string {
+			endpoint := r.URL.Path
+			if _, pattern := mux.Handler(r); pattern != "" {
+				endpoint = pattern
+			}
+
+			if httpPatternWithMethodRegexp.MatchString(endpoint) {
+				return endpoint
+			}
+
+			return fmt.Sprintf("%s %s", r.Method, endpoint)
 		}))
 
 	// Set timeouts from defaults, override
@@ -133,8 +143,8 @@ func prepHTTPServer(opts *opts.AppHTTP) *http.Server {
 	}
 }
 
-// Returns a shutdown func and a done channel if the
+// InitHTTPServer returns a shutdown func and a done channel if the
-// server aborts abnormally. Returns error on failure to start
+// server aborts abnormally. Returns error on failure to start.
 func InitHTTPServer(opts *opts.AppHTTP) (
 	func(context.Context) error, <-chan any, error,
 ) {

pkg/srv/http/http_health.go

@@ -55,7 +55,7 @@ func handleHealthCheckFunc(ctx context.Context, hcFuncs ...opts.HealthCheckFunc)
 }
 
 func dummyHealthCheck(ctx context.Context) error {
-	workFor := rand.Intn(750)
+	workFor := rand.Intn(740) + 10 // ensure positive
 	ticker := time.NewTicker(time.Duration(time.Duration(workFor) * time.Millisecond))
 
 	select {

pkg/srv/http/http_log.go

@@ -3,12 +3,15 @@ package http
 import (
 	"bytes"
 	"context"
-	"errors"
+	"fmt"
+	"io"
 	"net/http"
 	"regexp"
 	"time"
 
 	"github.com/rs/zerolog"
+
+	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/config"
 )
 
 var ExcludeFromLogging = regexp.MustCompile(`\/(ready|live|metrics)$`)
@@ -20,12 +23,22 @@ type LoggingResponseWriter struct {
 }
 
 func loggingMiddleware(appCtx context.Context, next http.Handler) http.Handler {
+	appConfig := config.MustFromCtx(appCtx)
+
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		if ExcludeFromLogging.Match([]byte(r.URL.Path)) {
 			next.ServeHTTP(w, r)
 			return
 		}
 
+		// User-configurable logging exclusions
+		for _, re := range appConfig.HTTP.GetExcludeRegexps() {
+			if re.MatchString(r.URL.Path) {
+				next.ServeHTTP(w, r)
+				return
+			}
+		}
+
 		log := zerolog.Ctx(appCtx)
 
 		start := time.Now()
@@ -41,29 +54,42 @@ func loggingMiddleware(appCtx context.Context, next http.Handler) http.Handler {
 			Dur("duration", time.Since(start)).
 			Msg("http request served")
 
-		// Log response body
+			// Log response with body if not 204
+		if lrr.statusCode == http.StatusNoContent {
+			trcLog := log.Trace().
+				Str("path", r.URL.Path).
+				Int("statusCode", lrr.statusCode)
+			trcLog.Msg("http response (no content)") // Explicitly log 204
+			return                                   // No body to log for 204 No Content
+		}
+
 		trcLog := log.Trace().
 			Str("path", r.URL.Path).
 			Int("statusCode", lrr.statusCode)
 
-		// Check if it's JSON
 		firstByte, err := lrr.body.ReadByte()
 		if err != nil {
-			trcLog.Err(errors.New("invalid response body")).Send()
+			if err == io.EOF {
-			return
+				// Body is empty, which might be valid for some non-204 responses.
+				trcLog.Msg("http response (empty body)")
+			} else {
+				// Other error reading the body. Wrap the original error for context.
+				trcLog.Err(fmt.Errorf("error reading response body: %w", err)).Send()
 			}
-		lrr.body.UnreadByte()
+			return // No further body processing if there was an error or it was empty
+		}
+		lrr.body.UnreadByte() // Put the byte back for Bytes() to read
 
 		if firstByte == '{' {
 			trcLog = trcLog.RawJSON("response", lrr.body.Bytes())
 		} else {
 			trcLog = trcLog.Bytes("response", lrr.body.Bytes())
 		}
-		trcLog.Msg("response payload")
+		trcLog.Msg("http response")
 	})
 }
 
-// Implement Flush to support the http.Flusher interface
+// Flush implements the http.Flusher interface to allow flushing buffered data.
 func (w *LoggingResponseWriter) Flush() {
 	if flusher, ok := w.ResponseWriter.(http.Flusher); ok {
 		flusher.Flush()

pkg/srv/http/http_test.go

@@ -0,0 +1,88 @@
+
+package http
+
+import (
+	"context"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/config"
+	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/otel"
+	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/srv/http/opts"
+)
+
+func TestInitHTTPServer(t *testing.T) {
+	cfg := &config.AppConfig{
+		Name: "test-app",
+		HTTP: &config.HTTPConfig{
+			Enabled: true,
+			Listen:  "127.0.0.1:0", // Use random available port
+		},
+		OTEL: &config.OTELConfig{
+			Enabled: true,
+		},
+	}
+	ctx := cfg.AddToCtx(context.Background())
+	ctx, _ = otel.Init(ctx)
+
+	httpOpts := &opts.AppHTTP{
+		Ctx: ctx,
+		Funcs: []opts.HTTPFunc{
+			{
+				Path: "/test",
+				HandlerFunc: func(w http.ResponseWriter, r *http.Request) {
+					w.WriteHeader(http.StatusOK)
+				},
+			},
+		},
+	}
+
+	shutdown, done, err := InitHTTPServer(httpOpts)
+	assert.NoError(t, err)
+	assert.NotNil(t, shutdown)
+	assert.NotNil(t, done)
+
+	// Shutdown the server
+	err = shutdown(context.Background())
+	assert.NoError(t, err)
+}
+
+func TestHealthCheck(t *testing.T) {
+	req := httptest.NewRequest("GET", "/health", nil)
+	w := httptest.NewRecorder()
+
+	handleHealthCheckFunc(context.Background())(w, req)
+
+	resp := w.Result()
+	body, _ := io.ReadAll(resp.Body)
+
+	assert.Equal(t, http.StatusOK, resp.StatusCode)
+	assert.Equal(t, "ok", string(body))
+}
+
+func TestLoggingMiddleware(t *testing.T) {
+	cfg := &config.AppConfig{
+		Name: "test-app",
+		HTTP: &config.HTTPConfig{
+			LogRequests: true,
+		},
+	}
+	ctx := cfg.AddToCtx(context.Background())
+
+	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+	})
+
+	middleware := loggingMiddleware(ctx, handler)
+
+	req := httptest.NewRequest("GET", "/test", nil)
+	w := httptest.NewRecorder()
+
+	middleware.ServeHTTP(w, req)
+
+	assert.Equal(t, http.StatusOK, w.Code)
+}