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feat(routing/http/server): expose prometheus metrics #718

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merged 7 commits into from
Nov 19, 2024
Merged

feat(routing/http/server): expose prometheus metrics #718

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8ad9bba
feat: add instrumentation to delegated routing endpoint
2color Nov 13, 2024
0fbf207
feat: allow passing in custom registry
2color Nov 13, 2024
a9aeafe
docs: update changelog
2color Nov 13, 2024
abb2fc2
chore: go mod tidy
2color Nov 13, 2024
a5f2aa7
fix: create new registry unless set
2color Nov 13, 2024
2d8efc3
chore: adjust histogram buckets
2color Nov 13, 2024
786e657
refactor: rename histogram
lidel Nov 18, 2024
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2 changes: 2 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -16,6 +16,8 @@ The following emojis are used to highlight certain changes:

### Added

- `routing/http/server`: added Prometheus instrumentation to http delegated routing endpoints.

### Changed

- No longer using `github.com/jbenet/goprocess` to avoid requiring in dependents.
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5 changes: 3 additions & 2 deletions examples/go.sum
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Expand Up @@ -97,9 +97,8 @@ github.com/gogo/protobuf v1.3.1/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXP
github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e h1:1r7pUrabqp18hOBcwBwiTsbnFeTZHV9eER/QT5JVZxY=
github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da h1:oI5xCqsCo564l8iNU+DwB5epxmsaqB+rhGL0m5jtYqE=
github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
github.com/golang/lint v0.0.0-20180702182130-06c8688daad7/go.mod h1:tluoj9z5200jBnyusfRPU2LqT6J+DAorxEvtC7LHB+E=
github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
Expand Down Expand Up @@ -467,6 +466,8 @@ github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeV
github.com/shurcooL/users v0.0.0-20180125191416-49c67e49c537/go.mod h1:QJTqeLYEDaXHZDBsXlPCDqdhQuJkuw4NOtaxYe3xii4=
github.com/shurcooL/webdavfs v0.0.0-20170829043945-18c3829fa133/go.mod h1:hKmq5kWdCj2z2KEozexVbfEZIWiTjhE0+UjmZgPqehw=
github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
github.com/slok/go-http-metrics v0.12.0 h1:mAb7hrX4gB4ItU6NkFoKYdBslafg3o60/HbGBRsKaG8=
github.com/slok/go-http-metrics v0.12.0/go.mod h1:Ee/mdT9BYvGrlGzlClkK05pP2hRHmVbRF9dtUVS8LNA=
github.com/smartystreets/assertions v1.2.0 h1:42S6lae5dvLc7BrLu/0ugRtcFVjoJNMC/N3yZFZkDFs=
github.com/smartystreets/assertions v1.2.0/go.mod h1:tcbTF8ujkAEcZ8TElKY+i30BzYlVhC/LOxJk7iOWnoo=
github.com/smartystreets/goconvey v1.7.2 h1:9RBaZCeXEQ3UselpuwUQHltGVXvdwm6cv1hgR6gDIPg=
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2 changes: 1 addition & 1 deletion go.mod
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Expand Up @@ -57,6 +57,7 @@ require (
github.com/polydawn/refmt v0.89.0
github.com/prometheus/client_golang v1.20.5
github.com/samber/lo v1.47.0
github.com/slok/go-http-metrics v0.12.0
github.com/spaolacci/murmur3 v1.1.0
github.com/stretchr/testify v1.9.0
github.com/whyrusleeping/base32 v0.0.0-20170828182744-c30ac30633cc
Expand Down Expand Up @@ -96,7 +97,6 @@ require (
github.com/go-logr/stdr v1.2.2 // indirect
github.com/go-task/slim-sprig/v3 v3.0.0 // indirect
github.com/godbus/dbus/v5 v5.1.0 // indirect
github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
github.com/google/gopacket v1.1.19 // indirect
github.com/google/pprof v0.0.0-20241017200806-017d972448fc // indirect
github.com/gopherjs/gopherjs v0.0.0-20190430165422-3e4dfb77656c // indirect
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2 changes: 2 additions & 0 deletions go.sum
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Expand Up @@ -467,6 +467,8 @@ github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeV
github.com/shurcooL/users v0.0.0-20180125191416-49c67e49c537/go.mod h1:QJTqeLYEDaXHZDBsXlPCDqdhQuJkuw4NOtaxYe3xii4=
github.com/shurcooL/webdavfs v0.0.0-20170829043945-18c3829fa133/go.mod h1:hKmq5kWdCj2z2KEozexVbfEZIWiTjhE0+UjmZgPqehw=
github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
github.com/slok/go-http-metrics v0.12.0 h1:mAb7hrX4gB4ItU6NkFoKYdBslafg3o60/HbGBRsKaG8=
github.com/slok/go-http-metrics v0.12.0/go.mod h1:Ee/mdT9BYvGrlGzlClkK05pP2hRHmVbRF9dtUVS8LNA=
github.com/smartystreets/assertions v1.2.0 h1:42S6lae5dvLc7BrLu/0ugRtcFVjoJNMC/N3yZFZkDFs=
github.com/smartystreets/assertions v1.2.0/go.mod h1:tcbTF8ujkAEcZ8TElKY+i30BzYlVhC/LOxJk7iOWnoo=
github.com/smartystreets/goconvey v1.7.2 h1:9RBaZCeXEQ3UselpuwUQHltGVXvdwm6cv1hgR6gDIPg=
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37 changes: 32 additions & 5 deletions routing/http/server/server.go
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Expand Up @@ -25,8 +25,12 @@
"github.com/libp2p/go-libp2p/core/routing"
"github.com/multiformats/go-multiaddr"
"github.com/multiformats/go-multibase"
"github.com/prometheus/client_golang/prometheus"

logging "github.com/ipfs/go-log/v2"
metrics "github.com/slok/go-http-metrics/metrics/prometheus"
"github.com/slok/go-http-metrics/middleware"
middlewarestd "github.com/slok/go-http-metrics/middleware/std"
)

const (
Expand Down Expand Up @@ -122,6 +126,12 @@
}
}

func WithPrometheusRegistry(reg prometheus.Registerer) Option {
return func(s *server) {
s.promRegistry = reg
}

Check warning on line 132 in routing/http/server/server.go

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routing/http/server/server.go#L129-L132 

Added lines #L129 - L132 were not covered by tests
}

func Handler(svc ContentRouter, opts ...Option) http.Handler {
server := &server{
svc: svc,
Expand All @@ -133,12 +143,28 @@
opt(server)
}

if server.promRegistry == nil {
server.promRegistry = prometheus.NewRegistry()
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iiuc this will disable metric for users by default, requiring opt-in via WithPrometheusRegistry.

I noticed we already call NewRegistry() in other places, and changing this requires a slight refactor of tests, so let's keep this as-is and cleanup in #722 without blocking this PR.

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Yeah. Creating a new registry without access to the registry is an anti-pattern because you can't expose those metrics.

We should definitely default to the default registry.

}

// Create middleware with prometheus recorder
mdlw := middleware.New(middleware.Config{
Recorder: metrics.NewRecorder(metrics.Config{
Registry: server.promRegistry,
Prefix: "delegated_routing_server",

DurationBuckets: []float64{0.1, 0.5, 1, 2, 5, 8, 10, 20, 30},
}),
})

r := mux.NewRouter()
r.HandleFunc(findProvidersPath, server.findProviders).Methods(http.MethodGet)
r.HandleFunc(providePath, server.provide).Methods(http.MethodPut)
r.HandleFunc(findPeersPath, server.findPeers).Methods(http.MethodGet)
r.HandleFunc(GetIPNSPath, server.GetIPNS).Methods(http.MethodGet)
r.HandleFunc(GetIPNSPath, server.PutIPNS).Methods(http.MethodPut)
// Wrap each handler with the metrics middleware
r.Handle(findProvidersPath, middlewarestd.Handler(findProvidersPath, mdlw, http.HandlerFunc(server.findProviders))).Methods(http.MethodGet)
r.Handle(providePath, middlewarestd.Handler(providePath, mdlw, http.HandlerFunc(server.provide))).Methods(http.MethodPut)
r.Handle(findPeersPath, middlewarestd.Handler(findPeersPath, mdlw, http.HandlerFunc(server.findPeers))).Methods(http.MethodGet)
r.Handle(GetIPNSPath, middlewarestd.Handler(GetIPNSPath, mdlw, http.HandlerFunc(server.GetIPNS))).Methods(http.MethodGet)
r.Handle(GetIPNSPath, middlewarestd.Handler(GetIPNSPath, mdlw, http.HandlerFunc(server.PutIPNS))).Methods(http.MethodPut)

return r
}

Expand All @@ -147,6 +173,7 @@
disableNDJSON bool
recordsLimit int
streamingRecordsLimit int
promRegistry prometheus.Registerer
}

func (s *server) detectResponseType(r *http.Request) (string, error) {
Expand Down