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Hunter/metrics middleware #100

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merged 6 commits into from
Jun 13, 2024
Merged

Hunter/metrics middleware #100

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5c29e7f
update metrics middleware
hunter-bera Jun 13, 2024
5e26fb1
update
hunter-bera Jun 13, 2024
23e508d
update metrics middleware to use standard http.Handler
hunter-bera Jun 13, 2024
502ce66
add back micro
hunter-bera Jun 13, 2024
fe116dc
fix suggestion
hunter-bera Jun 13, 2024
6f6d644
go mod
hunter-bera Jun 13, 2024
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10 changes: 6 additions & 4 deletions go.mod
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@ require (
github.com/berachain/go-utils v0.0.0-20240108175945-0bf7199282f7
github.com/ethereum/go-ethereum v1.13.4
github.com/golangci/golangci-lint v1.54.1
github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0
github.com/hashicorp/golang-lru/v2 v2.0.7
github.com/holiman/uint256 v1.2.4
github.com/huandu/skiplist v1.2.0
Expand All @@ -24,7 +25,7 @@ require (
github.com/spf13/viper v1.18.2
github.com/stretchr/testify v1.9.0
go-micro.dev/v4 v4.10.2
google.golang.org/grpc v1.62.1
google.golang.org/grpc v1.64.0
)

require (
Expand Down Expand Up @@ -110,7 +111,7 @@ require (
github.com/gobwas/glob v0.2.3 // indirect
github.com/gofrs/flock v0.8.1 // indirect
github.com/gogo/protobuf v1.3.2 // indirect
github.com/golang/protobuf v1.5.3 // indirect
github.com/golang/protobuf v1.5.4 // indirect
github.com/golang/snappy v0.0.5-0.20220116011046-fa5810519dcb // indirect
github.com/golangci/check v0.0.0-20180506172741-cfe4005ccda2 // indirect
github.com/golangci/dupl v0.0.0-20180902072040-3e9179ac440a // indirect
Expand Down Expand Up @@ -246,8 +247,9 @@ require (
golang.org/x/sys v0.20.0 // indirect
golang.org/x/text v0.15.0 // indirect
golang.org/x/tools v0.21.0 // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 // indirect
google.golang.org/protobuf v1.33.0 // indirect
google.golang.org/genproto/googleapis/api v0.0.0-20240513163218-0867130af1f8 // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20240513163218-0867130af1f8 // indirect
google.golang.org/protobuf v1.34.1 // indirect
gopkg.in/ini.v1 v1.67.0 // indirect
gopkg.in/yaml.v2 v2.4.0 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
Expand Down
20 changes: 12 additions & 8 deletions go.sum
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -360,8 +360,8 @@ github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw
github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
github.com/golang/snappy v0.0.4/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
github.com/golang/snappy v0.0.5-0.20220116011046-fa5810519dcb h1:PBC98N2aIaM3XXiurYmW7fx4GZkL8feAMVq7nEjURHk=
github.com/golang/snappy v0.0.5-0.20220116011046-fa5810519dcb/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
Expand Down Expand Up @@ -439,6 +439,8 @@ github.com/gostaticanalysis/nilerr v0.1.1/go.mod h1:wZYb6YI5YAxxq0i1+VJbY0s2YONW
github.com/gostaticanalysis/testutil v0.3.1-0.20210208050101-bfb5c8eec0e4/go.mod h1:D+FIZ+7OahH3ePw/izIEeH5I06eKs1IKI4Xr64/Am3M=
github.com/gostaticanalysis/testutil v0.4.0 h1:nhdCmubdmDF6VEatUNjgUZBJKWRqugoISdUv3PPQgHY=
github.com/gostaticanalysis/testutil v0.4.0/go.mod h1:bLIoPefWXrRi/ssLFWX1dx7Repi5x3CuviD3dgAZaBU=
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/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/UYA=
github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
github.com/hashicorp/go-bexpr v0.1.10 h1:9kuI5PFotCboP3dkDYFr/wi0gg0QVbSNz5oFRpxn4uE=
Expand Down Expand Up @@ -1241,8 +1243,10 @@ google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7Fc
google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 h1:AjyfHzEPEFp/NpvfN5g+KDla3EMojjhRVZc1i7cj+oM=
google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80/go.mod h1:PAREbraiVEVGVdTZsVWjSbbTtSyGbAgIIvni8a8CD5s=
google.golang.org/genproto/googleapis/api v0.0.0-20240513163218-0867130af1f8 h1:W5Xj/70xIA4x60O/IFyXivR5MGqblAb8R3w26pnD6No=
google.golang.org/genproto/googleapis/api v0.0.0-20240513163218-0867130af1f8/go.mod h1:vPrPUTsDCYxXWjP7clS81mZ6/803D8K4iM9Ma27VKas=
google.golang.org/genproto/googleapis/rpc v0.0.0-20240513163218-0867130af1f8 h1:mxSlqyb8ZAHsYDCfiXN1EDdNTdvjUJSLY+OnAUtYNYA=
google.golang.org/genproto/googleapis/rpc v0.0.0-20240513163218-0867130af1f8/go.mod h1:I7Y+G38R2bu5j1aLzfFmQfTcU/WnFuqDwLZAbvKTKpM=
google.golang.org/grpc v1.12.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
Expand All @@ -1256,8 +1260,8 @@ google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKa
google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
google.golang.org/grpc v1.62.1 h1:B4n+nfKzOICUXMgyrNd19h/I9oH0L1pizfk1d4zSgTk=
google.golang.org/grpc v1.62.1/go.mod h1:IWTG0VlJLCh1SkC58F7np9ka9mx/WNkjl4PGJaiq+QE=
google.golang.org/grpc v1.64.0 h1:KH3VH9y/MgNQg1dE7b3XfVK0GsPSIzJwdF617gUSbvY=
google.golang.org/grpc v1.64.0/go.mod h1:oxjF8E3FBnjp+/gVFYdWacaLDx9na1aqy9oovLpxQYg=
google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
Expand All @@ -1270,8 +1274,8 @@ google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGj
google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
google.golang.org/protobuf v1.34.1 h1:9ddQBjfCyZPOHPUiPxpYESBLc+T8P3E+Vo4IbKZgFWg=
google.golang.org/protobuf v1.34.1/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
Expand Down
74 changes: 70 additions & 4 deletions telemetry/handler_wrapper.go
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Original file line number Diff line number Diff line change
Expand Up @@ -3,20 +3,74 @@ package telemetry
import (
"context"
"fmt"
"net/http"
"time"

"github.com/berachain/offchain-sdk/log"
"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
"go-micro.dev/v4/server"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)

// GetHandlerWrapper wraps a HTTP server with the given Metrics instance.
// telemetryRespWriter is a wrapper around http.ResponseWriter that captures the status code.
type telemetryRespWriter struct {
http.ResponseWriter
statusCode int
}

func newTelemetryRespWriter(w http.ResponseWriter) *telemetryRespWriter {
// Default to 200 OK in case the handler does not explicitly set the status code.
return &telemetryRespWriter{ResponseWriter: w, statusCode: http.StatusOK}
}

func (rw *telemetryRespWriter) WriteHeader(code int) {
rw.statusCode = code
rw.ResponseWriter.WriteHeader(code)
}

// WrapHTTPHandler wraps a HTTP server with the given Metrics instance.
// to collect telemetry for every request/response.
func GetHandlerWrapper(m Metrics, log log.Logger) server.HandlerWrapper {
func WrapHTTPHandler(m Metrics, log log.Logger) func(http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
log.Debug("Request received", "method", r.Method, "path", r.URL.Path)
customWriter := newTelemetryRespWriter(w)
metricsTags := getHTTPRequestTags(r)

// Increment request count metric under `request.count`
m.IncMonotonic("request.count", metricsTags)

start := time.Now()
next.ServeHTTP(customWriter, r)

// Record latency metric under `response.latency`
m.Time("request.latency", time.Since(start), metricsTags)

// Separately record errors under `request.errors`
if customWriter.statusCode >= http.StatusBadRequest {
if customWriter.statusCode >= http.StatusInternalServerError {
log.Error(
"Internal error",
"statusCode", customWriter.statusCode,
"method", r.Method,
"path", r.URL.Path,
)
}

metricsTags = append(metricsTags, fmt.Sprintf("code:%d", customWriter.statusCode))
m.IncMonotonic("request.errors", metricsTags)
}
})
}
}

// WrapMicroServerHandler wraps a Micro server with the given Metrics instance
// to collect telemetry for every request/response.
func WrapMicroServerHandler(m Metrics, log log.Logger) server.HandlerWrapper {
return func(next server.HandlerFunc) server.HandlerFunc {
return func(c context.Context, req server.Request, rsp interface{}) error {
metricsTags := getRequestTags(req)
metricsTags := getMicroRequestTags(req)

// Increment request count metric under `request.count`
m.IncMonotonic("request.count", metricsTags)
Expand All @@ -43,8 +97,20 @@ func GetHandlerWrapper(m Metrics, log log.Logger) server.HandlerWrapper {
}
}

func getRequestTags(req server.Request) []string {
func getMicroRequestTags(req server.Request) []string {
return []string{
fmt.Sprintf("endpoint:%s", req.Endpoint()), fmt.Sprintf("method:%s", req.Method()),
}
}

func getHTTPRequestTags(req *http.Request) []string {
// if the request is a gRPC-gateway request, use the gRPC method as the endpoint
// i.e. "/package.service/method"
rpcMethod, ok := runtime.RPCMethod(req.Context())
if !ok {
rpcMethod = req.URL.Path
}
return []string{
fmt.Sprintf("endpoint:%s", rpcMethod), fmt.Sprintf("method:%s", req.Method),
}
}
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