Adding metrics for request total, latency and size

go.mod

@@ -12,6 +12,7 @@ require (
 	github.com/jhump/protoreflect v1.17.0
 	github.com/onsi/ginkgo/v2 v2.22.2
 	github.com/onsi/gomega v1.36.2
+	github.com/prometheus/client_golang v1.20.4
 	github.com/prometheus/client_model v0.6.1
 	github.com/prometheus/common v0.61.0
 	github.com/stretchr/testify v1.10.0
@@ -22,6 +23,7 @@ require (
 	k8s.io/apimachinery v0.31.4
 	k8s.io/client-go v0.31.4
 	k8s.io/code-generator v0.31.4
+	k8s.io/component-base v0.31.4
 	k8s.io/klog/v2 v2.130.1
 	sigs.k8s.io/controller-runtime v0.19.4
 	sigs.k8s.io/structured-merge-diff/v4 v4.5.0
@@ -37,8 +39,12 @@ require (
 	github.com/Masterminds/sprig v2.22.0+incompatible // indirect
 	github.com/Masterminds/sprig/v3 v3.2.3 // indirect
 	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
+	github.com/antlr4-go/antlr/v4 v4.13.0 // indirect
+	github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/blang/semver/v4 v4.0.0 // indirect
 	github.com/bufbuild/protocompile v0.14.1 // indirect
+	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cncf/xds/go v0.0.0-20240905190251-b4127c9b8d78 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
@@ -48,9 +54,11 @@ require (
 	github.com/envoyproxy/protoc-gen-validate v1.1.0 // indirect
 	github.com/evanphx/json-patch/v5 v5.9.0 // indirect
 	github.com/fatih/color v1.16.0 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/fxamacker/cbor/v2 v2.7.0 // indirect
 	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-openapi/jsonpointer v0.19.6 // indirect
 	github.com/go-openapi/jsonreference v0.20.2 // indirect
 	github.com/go-openapi/swag v0.22.4 // indirect
@@ -60,17 +68,20 @@ require (
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
+	github.com/google/cel-go v0.20.1 // indirect
 	github.com/google/gnostic-models v0.6.8 // indirect
 	github.com/google/gofuzz v1.2.0 // indirect
 	github.com/google/pprof v0.0.0-20241210010833-40e02aabc2ad // indirect
 	github.com/google/uuid v1.6.0 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0 // indirect
 	github.com/huandu/xstrings v1.3.3 // indirect
 	github.com/imdario/mergo v0.3.11 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/jinzhu/configor v1.2.1 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
@@ -82,13 +93,21 @@ require (
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
-	github.com/prometheus/client_golang v1.20.4 // indirect
 	github.com/prometheus/procfs v0.15.1 // indirect
 	github.com/shopspring/decimal v1.2.0 // indirect
 	github.com/spf13/cast v1.4.1 // indirect
 	github.com/spf13/cobra v1.8.1 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/stoewer/go-strcase v1.2.0 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.53.0 // indirect
+	go.opentelemetry.io/otel v1.31.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.28.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.27.0 // indirect
+	go.opentelemetry.io/otel/metric v1.31.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.31.0 // indirect
+	go.opentelemetry.io/otel/trace v1.31.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.3.1 // indirect
 	go.uber.org/zap v1.27.0 // indirect
 	golang.org/x/crypto v0.31.0 // indirect
 	golang.org/x/exp v0.0.0-20230515195305-f3d0a9c9a5cc // indirect
@@ -110,9 +129,11 @@ require (
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	k8s.io/apiextensions-apiserver v0.31.0 // indirect
+	k8s.io/apiserver v0.31.4 // indirect
 	k8s.io/gengo/v2 v2.0.0-20240228010128-51d4e06bde70 // indirect
 	k8s.io/kube-openapi v0.0.0-20240228011516-70dd3763d340 // indirect
 	k8s.io/utils v0.0.0-20240711033017-18e509b52bc8 // indirect
+	sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.30.3 // indirect
 	sigs.k8s.io/controller-tools v0.14.0 // indirect
 	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect
 	sigs.k8s.io/yaml v1.4.0 // indirect

go.sum

@@ -17,12 +17,20 @@ github.com/Masterminds/sprig/v3 v3.2.3 h1:eL2fZNezLomi0uOLqjQoN6BfsDD+fyLtgbJMAj
 github.com/Masterminds/sprig/v3 v3.2.3/go.mod h1:rXcFaZ2zZbLRJv/xSysmlgIM1u11eBaRMhvYXJNkGuM=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 h1:JYp7IbQjafoB+tBA3gMyHYHrpOtNuDiK/uB5uXxq5wM=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/antlr4-go/antlr/v4 v4.13.0 h1:lxCg3LAv+EUK6t1i0y1V6/SLeUi0eKEKdhQAlS8TVTI=
+github.com/antlr4-go/antlr/v4 v4.13.0/go.mod h1:pfChB/xh/Unjila75QW7+VU4TSnWnnk9UTnmpPaOR2g=
+github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a h1:idn718Q4B6AGu/h5Sxe66HYVdqdGu2l9Iebqhi/AEoA=
+github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 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/blang/semver/v4 v4.0.0 h1:1PFHFE6yCCTv8C1TeyNNarDzntLi7wMI5i/pzqYIsAM=
+github.com/blang/semver/v4 v4.0.0/go.mod h1:IbckMUScFkM3pff0VJDNKRiT6TG/YpiHIM2yvyW5YoQ=
 github.com/bojand/ghz v0.120.0 h1:6F4wsmZVwFg5UnD+/R+IABWk6sKE/0OKIBdUQUZnOdo=
 github.com/bojand/ghz v0.120.0/go.mod h1:HfECuBZj1v02XObGnRuoZgyB1PR24/25dIYiJIMjJnE=
 github.com/bufbuild/protocompile v0.14.1 h1:iA73zAf/fyljNjQKwYzUHD6AD4R8KMasmwa/FBatYVw=
 github.com/bufbuild/protocompile v0.14.1/go.mod h1:ppVdAIhbr2H8asPk6k4pY7t9zB1OU5DoEw9xY/FUi1c=
+github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
+github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 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/cncf/xds/go v0.0.0-20240905190251-b4127c9b8d78 h1:QVw89YDxXxEe+l8gU8ETbOasdwEV+avkR75ZzsVV9WI=
@@ -53,10 +61,13 @@ github.com/evanphx/json-patch/v5 v5.9.0 h1:kcBlZQbplgElYIlo/n1hJbls2z/1awpXxpRi0
 github.com/evanphx/json-patch/v5 v5.9.0/go.mod h1:VNkHZ/282BpEyt/tObQO8s5CMPmYYq14uClGH4abBuQ=
 github.com/fatih/color v1.16.0 h1:zmkK9Ngbjj+K0yRhTVONQh1p/HknKYSlNT+vZCzyokM=
 github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4NijnWvE=
+github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2Wg=
+github.com/felixge/httpsnoop v1.0.4/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
 github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA=
 github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
 github.com/fxamacker/cbor/v2 v2.7.0 h1:iM5WgngdRBanHcxugY4JySA0nk1wZorNOpTgCMedv5E=
 github.com/fxamacker/cbor/v2 v2.7.0/go.mod h1:pxXPTn3joSm21Gbwsv0w9OSA2y1HFR9qXEeXQVeNoDQ=
+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 v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
@@ -89,6 +100,8 @@ github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da h1:oI5xCqsCo564l
 github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 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 v0.20.1 h1:nDx9r8S3L4pE61eDdt8igGj8rf5kjYR3ILxWIpWNi84=
+github.com/google/cel-go v0.20.1/go.mod h1:kWcIzTsPX0zmQ+H3TirHstLLf9ep5QTsZBN9u4dOYLg=
 github.com/google/gnostic-models v0.6.8 h1:yo/ABAfM5IMRsS1VnXjTBvUb61tFIHozhlYvRgGre9I=
 github.com/google/gnostic-models v0.6.8/go.mod h1:5n7qKqH0f5wFt+aWF8CW6pZLLNOfYuF5OpfBSENuI8U=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
@@ -102,6 +115,8 @@ github.com/google/pprof v0.0.0-20241210010833-40e02aabc2ad/go.mod h1:vavhavw2zAx
 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 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/grpc-ecosystem/grpc-gateway/v2 v2.20.0 h1:bkypFPDjIYGfCYD5mRBvpqxfYX1YCS1PXdKYWi8FsN0=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0/go.mod h1:P+Lt/0by1T8bfcF3z737NnSbmxQAppXMRziHUxPOC8k=
 github.com/huandu/xstrings v1.3.3 h1:/Gcsuc1x8JVbJ9/rlye4xZnVAbEkGauT8lbebqcQws4=
 github.com/huandu/xstrings v1.3.3/go.mod h1:y5/lhBue+AyNmUVz9RLU9xbLR0o4KIIExikq4ovT0aE=
 github.com/imdario/mergo v0.3.11 h1:3tnifQM4i+fbajXKBHXWEH+KvNHqojZ778UH75j3bGA=
@@ -186,6 +201,8 @@ github.com/spf13/cobra v1.8.1 h1:e5/vxKd/rZsfSJMUX1agtjeTDf+qv1/JdBF8gg5k9ZM=
 github.com/spf13/cobra v1.8.1/go.mod h1:wHxEcudfqmLYa8iTfL+OuZPbBZkmvliBWKIezN3kD9Y=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/stoewer/go-strcase v1.2.0 h1:Z2iHWqGXH00XYgqDmNgQbIBxf3wrNq0F3feEy0ainaU=
+github.com/stoewer/go-strcase v1.2.0/go.mod h1:IBiWB2sKIp3wVVQ3Y035++gc+knqhUQag1KpM8ahLw8=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
@@ -202,8 +219,14 @@ github.com/x448/float16 v0.8.4/go.mod h1:14CWIYCyZA/cWjXOioeEpHeN/83MdbZDRQHoFcY
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.53.0 h1:4K4tsIXefpVJtvA/8srF4V4y0akAoPHkIslgAkjixJA=
+go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.53.0/go.mod h1:jjdQuTGVsXV4vSs+CJ2qYDeDPf9yIJV23qlIzBm73Vg=
 go.opentelemetry.io/otel v1.31.0 h1:NsJcKPIW0D0H3NgzPDHmo0WW6SptzPdqg/L1zsIm2hY=
 go.opentelemetry.io/otel v1.31.0/go.mod h1:O0C14Yl9FgkjqcCZAsE053C13OaddMYr/hz6clDkEJE=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.28.0 h1:3Q/xZUyC1BBkualc9ROb4G8qkH90LXEIICcs5zv1OYY=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.28.0/go.mod h1:s75jGIWA9OfCMzF0xr+ZgfrB5FEbbV7UuYo32ahUiFI=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.27.0 h1:qFffATk0X+HD+f1Z8lswGiOQYKHRlzfmdJm0wEaVrFA=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.27.0/go.mod h1:MOiCmryaYtc+V0Ei+Tx9o5S1ZjA7kzLucuVuyzBZloQ=
 go.opentelemetry.io/otel/metric v1.31.0 h1:FSErL0ATQAmYHUIzSezZibnyVlft1ybhy4ozRPcF2fE=
 go.opentelemetry.io/otel/metric v1.31.0/go.mod h1:C3dEloVbLuYoX41KpmAhOqNriGbA+qqH6PQ5E5mUfnY=
 go.opentelemetry.io/otel/sdk v1.31.0 h1:xLY3abVHYZ5HSfOg3l2E5LUj2Cwva5Y7yGxnSW9H5Gk=
@@ -212,6 +235,8 @@ go.opentelemetry.io/otel/sdk/metric v1.31.0 h1:i9hxxLJF/9kkvfHppyLL55aW7iIJz4Jjx
 go.opentelemetry.io/otel/sdk/metric v1.31.0/go.mod h1:CRInTMVvNhUKgSAMbKyTMxqOBC0zgyxzW55lZzX43Y8=
 go.opentelemetry.io/otel/trace v1.31.0 h1:ffjsj1aRouKewfr85U2aGagJ46+MvodynlQ1HYdmJys=
 go.opentelemetry.io/otel/trace v1.31.0/go.mod h1:TXZkRk7SM2ZQLtR6eoAWQFIHPvzQ06FJAsO1tJg480A=
+go.opentelemetry.io/proto/otlp v1.3.1 h1:TrMUixzpM0yuc/znrFTP9MMRh8trP93mkCiDVeXrui0=
+go.opentelemetry.io/proto/otlp v1.3.1/go.mod h1:0X1WI4de4ZsLrrJNLAQbFeLCm3T7yBkR0XqQ7niQU+8=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
 go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
@@ -319,10 +344,14 @@ k8s.io/apiextensions-apiserver v0.31.0 h1:fZgCVhGwsclj3qCw1buVXCV6khjRzKC5eCFt24
 k8s.io/apiextensions-apiserver v0.31.0/go.mod h1:b9aMDEYaEe5sdK+1T0KU78ApR/5ZVp4i56VacZYEHxk=
 k8s.io/apimachinery v0.31.4 h1:8xjE2C4CzhYVm9DGf60yohpNUh5AEBnPxCryPBECmlM=
 k8s.io/apimachinery v0.31.4/go.mod h1:rsPdaZJfTfLsNJSQzNHQvYoTmxhoOEofxtOsF3rtsMo=
+k8s.io/apiserver v0.31.4 h1:JbtnTaXVYEAYIHJil6Wd74Wif9sd8jVcBw84kwEmp7o=
+k8s.io/apiserver v0.31.4/go.mod h1:JJjoTjZ9PTMLdIFq7mmcJy2B9xLN3HeAUebW6xZyIP0=
 k8s.io/client-go v0.31.4 h1:t4QEXt4jgHIkKKlx06+W3+1JOwAFU/2OPiOo7H92eRQ=
 k8s.io/client-go v0.31.4/go.mod h1:kvuMro4sFYIa8sulL5Gi5GFqUPvfH2O/dXuKstbaaeg=
 k8s.io/code-generator v0.31.4 h1:Vu+8fKz+239rKiVDHFVHgjQ162cg5iUQPtTyQbwXeQw=
 k8s.io/code-generator v0.31.4/go.mod h1:yMDt13Kn7m4MMZ4LxB1KBzdZjEyxzdT4b4qXq+lnI90=
+k8s.io/component-base v0.31.4 h1:wCquJh4ul9O8nNBSB8N/o8+gbfu3BVQkVw9jAUY/Qtw=
+k8s.io/component-base v0.31.4/go.mod h1:G4dgtf5BccwiDT9DdejK0qM6zTK0jwDGEKnCmb9+u/s=
 k8s.io/gengo/v2 v2.0.0-20240228010128-51d4e06bde70 h1:NGrVE502P0s0/1hudf8zjgwki1X/TByhmAoILTarmzo=
 k8s.io/gengo/v2 v2.0.0-20240228010128-51d4e06bde70/go.mod h1:VH3AT8AaQOqiGjMF9p0/IM1Dj+82ZwjfxUP1IxaHE+8=
 k8s.io/klog/v2 v2.130.1 h1:n9Xl7H1Xvksem4KFG4PYbdQCQxqc/tTUyrgXaOhHSzk=
@@ -331,6 +360,8 @@ k8s.io/kube-openapi v0.0.0-20240228011516-70dd3763d340 h1:BZqlfIlq5YbRMFko6/PM7F
 k8s.io/kube-openapi v0.0.0-20240228011516-70dd3763d340/go.mod h1:yD4MZYeKMBwQKVht279WycxKyM84kkAx2DPrTXaeb98=
 k8s.io/utils v0.0.0-20240711033017-18e509b52bc8 h1:pUdcCO1Lk/tbT5ztQWOBi5HBgbBP1J8+AsQnQCKsi8A=
 k8s.io/utils v0.0.0-20240711033017-18e509b52bc8/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
+sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.30.3 h1:2770sDpzrjjsAtVhSeUFseziht227YAWYHLGNM8QPwY=
+sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.30.3/go.mod h1:Ve9uj1L+deCXFrPOk1LpFXqTg7LCFzFso6PA48q/XZw=
 sigs.k8s.io/controller-runtime v0.19.4 h1:SUmheabttt0nx8uJtoII4oIP27BVVvAKFvdvGFwV/Qo=
 sigs.k8s.io/controller-runtime v0.19.4/go.mod h1:iRmWllt8IlaLjvTTDLhRBXIEtkCK6hwVBJJsYS9Ajf4=
 sigs.k8s.io/controller-tools v0.14.0 h1:rnNoCC5wSXlrNoBKKzL70LNJKIQKEzT6lloG6/LF73A=

pkg/ext-proc/handlers/request.go

@@ -76,6 +76,8 @@ func (s *Server) HandleRequestBody(reqCtx *RequestContext, req *extProcPb.Proces
 	klog.V(3).Infof("Selected target model %v in target pod: %v\n", llmReq.ResolvedTargetModel, targetPod)
 
 	reqCtx.Model = llmReq.Model
+	reqCtx.ResolvedTargetModel = llmReq.ResolvedTargetModel
+	reqCtx.RequestSize = len(v.RequestBody.Body)
 	reqCtx.TargetPod = targetPod
 
 	// Insert "target-pod" to instruct Envoy to route requests to the specified target pod.

pkg/ext-proc/handlers/response.go

@@ -73,6 +73,12 @@ func (s *Server) HandleResponseBody(reqCtx *RequestContext, req *extProcPb.Proce
 		return nil, fmt.Errorf("unmarshaling response body: %v", err)
 	}
 	reqCtx.Response = res
+	// ResponseComplete is to indicate the response is complete. In non-streaming
+	// case, it will be set to be true once the response is processed; in
+	// streaming case, it will be set to be true once the last chunk is processed.
+	// TODO(https://github.com/kubernetes-sigs/gateway-api-inference-extension/issues/178)
+	// will add the processing for streaming case.
+	reqCtx.ResponseComplete = true
 	klog.V(3).Infof("Response: %+v", res)
 
 	resp := &extProcPb.ProcessingResponse{

pkg/ext-proc/handlers/server.go

@@ -2,13 +2,15 @@ package handlers
 
 import (
 	"io"
+	"time"
 
 	extProcPb "github.com/envoyproxy/go-control-plane/envoy/service/ext_proc/v3"
 	envoyTypePb "github.com/envoyproxy/go-control-plane/envoy/type/v3"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 	"inference.networking.x-k8s.io/gateway-api-inference-extension/api/v1alpha1"
 	"inference.networking.x-k8s.io/gateway-api-inference-extension/pkg/ext-proc/backend"
+	"inference.networking.x-k8s.io/gateway-api-inference-extension/pkg/ext-proc/metrics"
 	"inference.networking.x-k8s.io/gateway-api-inference-extension/pkg/ext-proc/scheduling"
 	klog "k8s.io/klog/v2"
 )
@@ -75,22 +77,30 @@ func (s *Server) Process(srv extProcPb.ExternalProcessor_ProcessServer) error {
 		var resp *extProcPb.ProcessingResponse
 		switch v := req.Request.(type) {
 		case *extProcPb.ProcessingRequest_RequestHeaders:
+			reqCtx.RequestReceivedTimestamp = time.Now()
 			resp = HandleRequestHeaders(reqCtx, req)
 			klog.V(3).Infof("Request context after HandleRequestHeaders: %+v", reqCtx)
 		case *extProcPb.ProcessingRequest_RequestBody:
 			resp, err = s.HandleRequestBody(reqCtx, req)
+			if err == nil {
+				metrics.RecordRequestCounter(reqCtx.Model, reqCtx.ResolvedTargetModel)
+				metrics.RecordRequestSizes(reqCtx.Model, reqCtx.ResolvedTargetModel, reqCtx.RequestSize)
+			}
 			klog.V(3).Infof("Request context after HandleRequestBody: %+v", reqCtx)
 		case *extProcPb.ProcessingRequest_ResponseHeaders:
 			resp, err = s.HandleResponseHeaders(reqCtx, req)
 			klog.V(3).Infof("Request context after HandleResponseHeaders: %+v", reqCtx)
 		case *extProcPb.ProcessingRequest_ResponseBody:
 			resp, err = s.HandleResponseBody(reqCtx, req)
+			if err == nil && reqCtx.ResponseComplete {
+				reqCtx.ResponseCompleteTimestamp = time.Now()
+				metrics.RecordRequestLatencies(reqCtx.Model, reqCtx.ResolvedTargetModel, reqCtx.RequestReceivedTimestamp, reqCtx.ResponseCompleteTimestamp)
+			}
 			klog.V(3).Infof("Request context after HandleResponseBody: %+v", reqCtx)
 		default:
 			klog.Errorf("Unknown Request type %+v", v)
 			return status.Error(codes.Unknown, "unknown request type")
 		}
-
 		if err != nil {
 			klog.Errorf("failed to process request: %v", err)
 			switch status.Code(err) {
@@ -121,7 +131,12 @@ func (s *Server) Process(srv extProcPb.ExternalProcessor_ProcessServer) error {
 
 // RequestContext stores context information during the life time of an HTTP request.
 type RequestContext struct {
-	TargetPod backend.Pod
-	Model     string
-	Response  Response
+	TargetPod                 backend.Pod
+	Model                     string
+	ResolvedTargetModel       string
+	RequestReceivedTimestamp  time.Time
+	ResponseCompleteTimestamp time.Time
+	RequestSize               int
+	Response                  Response
+	ResponseComplete          bool
 }