feat: add GoRoutine service

moves all services into the service package

README.md

@@ -25,6 +25,7 @@ import (
   "net/http"
 
   "github.com/foomo/keel"
+  "github.com/foomo/keel/service"
 )
 
 func main() {
@@ -39,7 +40,7 @@ func main() {
   svs := newService()
 
   svr.AddService(
-    keel.NewServiceHTTP(l, "demo", ":8080", svs),
+    service.NewHTTP(l, "demo", "localhost:8080", svs),
   )
 
   svr.Run()

errors.go

@@ -5,6 +5,5 @@ import (
 )
 
 var (
-	ErrServerNotRunning  = errors.New("server not running")
-	ErrServiceNotRunning = errors.New("service not running")
+	ErrServerNotRunning = errors.New("server not running")
 )

examples/config/main.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"github.com/davecgh/go-spew/spew"
+	"github.com/foomo/keel/service"
 
 	"github.com/foomo/keel"
 	"github.com/foomo/keel/config"
@@ -85,7 +86,7 @@ func main() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8081", svs),
+		service.NewHTTP(l, "demo", "localhost:8081", svs),
 	)
 
 	svr.Run()

examples/graceful/main.go

@@ -6,6 +6,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/foomo/keel/service"
 	"go.uber.org/zap"
 
 	"github.com/foomo/keel"
@@ -32,7 +33,7 @@ func main() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs),
+		service.NewHTTP(l, "demo", "localhost:8080", svs),
 	)
 
 	svr.Run()

examples/healthz/main.go

@@ -8,6 +8,8 @@ import (
 
 	"github.com/foomo/keel"
 	"github.com/foomo/keel/examples/healthz/handler"
+	"github.com/foomo/keel/healthz"
+	"github.com/foomo/keel/service"
 )
 
 // See k8s for probe documentation
@@ -46,7 +48,7 @@ func main() {
 	svr.AddReadinessHealthzers(rh)
 
 	// add inline probe e.g. in case you start go routines
-	svr.AddAlwaysHealthzers(keel.NewHealthzerFn(func(ctx context.Context) error {
+	svr.AddAlwaysHealthzers(healthz.NewHealthzerFn(func(ctx context.Context) error {
 		l.Info("healther fn")
 		return nil
 	}))
@@ -69,7 +71,7 @@ func main() {
 
 	// add services
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs),
+		service.NewHTTP(l, "demo", "localhost:8080", svs),
 	)
 
 	// start serer

examples/logging/main.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/foomo/keel"
 	"github.com/foomo/keel/log"
+	"github.com/foomo/keel/service"
 )
 
 type CustomError struct {
@@ -46,7 +47,7 @@ func main() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs),
+		service.NewHTTP(l, "demo", "localhost:8080", svs),
 	)
 
 	svr.Run()

examples/middlewares/basicauth/main.go

@@ -6,6 +6,7 @@ import (
 	"github.com/foomo/keel"
 	"github.com/foomo/keel/log"
 	"github.com/foomo/keel/net/http/middleware"
+	"github.com/foomo/keel/service"
 	httputils "github.com/foomo/keel/utils/net/http"
 )
 
@@ -29,7 +30,7 @@ func main() {
 	log.Must(l, err, "failed to hash password")
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.BasicAuth(
 				username,
 				passwordHash,

examples/middlewares/cors/main.go

@@ -6,6 +6,7 @@ import (
 	"github.com/foomo/keel"
 	keelhttp "github.com/foomo/keel/net/http"
 	"github.com/foomo/keel/net/http/middleware"
+	"github.com/foomo/keel/service"
 )
 
 func main() {
@@ -22,7 +23,7 @@ func main() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.CORS(
 				middleware.CORSWithAllowOrigins("example.com"),
 				middleware.CORSWithAllowMethods(http.MethodGet, http.MethodPost),

examples/middlewares/jwtfromcookie/main.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"strings"
 
+	"github.com/foomo/keel/service"
 	jwt2 "github.com/golang-jwt/jwt"
 	"go.uber.org/zap"
 
@@ -75,7 +76,7 @@ func main() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.Skip(
 				middleware.JWT(
 					jwtInst,

examples/middlewares/jwtfromtoken/main.go

@@ -5,6 +5,7 @@ import (
 	"crypto/rsa"
 	"net/http"
 
+	"github.com/foomo/keel/service"
 	jwt2 "github.com/golang-jwt/jwt"
 
 	"github.com/foomo/keel"
@@ -66,7 +67,7 @@ func main() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.Skip(
 				middleware.JWT(
 					jwtInst,

examples/middlewares/logger/main.go

@@ -6,6 +6,7 @@ import (
 	"github.com/foomo/keel"
 	keelhttp "github.com/foomo/keel/net/http"
 	"github.com/foomo/keel/net/http/middleware"
+	"github.com/foomo/keel/service"
 )
 
 func main() {
@@ -22,7 +23,7 @@ func main() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.Logger(),
 		),
 	)

examples/middlewares/recover/main.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/foomo/keel"
 	"github.com/foomo/keel/net/http/middleware"
+	"github.com/foomo/keel/service"
 )
 
 func main() {
@@ -23,7 +24,7 @@ func main() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.Recover(
 				middleware.RecoverWithDisablePrintStack(true),
 			),

examples/middlewares/requestid/main.go

@@ -6,6 +6,7 @@ import (
 	"github.com/foomo/keel"
 	keelhttp "github.com/foomo/keel/net/http"
 	"github.com/foomo/keel/net/http/middleware"
+	"github.com/foomo/keel/service"
 )
 
 func main() {
@@ -27,7 +28,7 @@ func main() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.RequestID(
 				middleware.RequestIDWithSetResponseHeader(true),
 				middleware.RequestIDWithGenerator(requestIDGenerator),

examples/middlewares/responsetime/main.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/foomo/keel"
 	"github.com/foomo/keel/net/http/middleware"
+	"github.com/foomo/keel/service"
 )
 
 func main() {
@@ -27,7 +28,7 @@ func main() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.ResponseTime(
 				// automatically set cookie if not exists
 				middleware.ResponseTimeWithMaxDuration(time.Millisecond*500),

examples/middlewares/sessionid/main.go

@@ -8,6 +8,7 @@ import (
 	keelhttp "github.com/foomo/keel/net/http"
 	"github.com/foomo/keel/net/http/cookie"
 	"github.com/foomo/keel/net/http/middleware"
+	"github.com/foomo/keel/service"
 )
 
 func main() {
@@ -44,7 +45,7 @@ func main() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.SessionID(
 				// automatically set cookie if not exists
 				middleware.SessionIDWithSetCookie(true),

examples/middlewares/skip/main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"net/http"
 
+	"github.com/foomo/keel/service"
 	"go.uber.org/zap"
 
 	"github.com/foomo/keel"
@@ -28,7 +29,7 @@ func main() {
 
 	svr.AddServices(
 		// with URI blacklist
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.Skip(
 				func(l *zap.Logger, name string, next http.Handler) http.Handler {
 					return http.NotFoundHandler()
@@ -38,7 +39,7 @@ func main() {
 		),
 
 		// with URI whitelist
-		keel.NewServiceHTTP(l, "demo", ":8081", svs,
+		service.NewHTTP(l, "demo", "localhost:8081", svs,
 			middleware.Skip(
 				func(l *zap.Logger, name string, next http.Handler) http.Handler {
 					return http.NotFoundHandler()

examples/middlewares/telemetry/main.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/foomo/keel"
 	"github.com/foomo/keel/net/http/middleware"
+	"github.com/foomo/keel/service"
 )
 
 func main() {
@@ -23,7 +24,7 @@ func main() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.Telemetry(
 				middleware.TelemetryWithInjectPropagationHeader(true),
 			),

examples/middlewares/tokenauthfromcookie/main.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/foomo/keel"
 	"github.com/foomo/keel/net/http/middleware"
+	"github.com/foomo/keel/service"
 )
 
 func main() {
@@ -26,7 +27,7 @@ func main() {
 	tokenProvider := middleware.CookieTokenProvider("keel-token")
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.TokenAuth(
 				token,
 				middleware.TokenAuthWithTokenProvider(tokenProvider),

examples/middlewares/tokenauthfromheader/main.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/foomo/keel"
 	"github.com/foomo/keel/net/http/middleware"
+	"github.com/foomo/keel/service"
 )
 
 func main() {
@@ -29,7 +30,7 @@ func main() {
 	)
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.TokenAuth(
 				token,
 				middleware.TokenAuthWithTokenProvider(tokenProvider),

examples/remoteconfig/main.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/foomo/keel"
 	"github.com/foomo/keel/config"
+	"github.com/foomo/keel/service"
 )
 
 func main() {
@@ -42,7 +43,7 @@ func main() {
 
 	// curl localhost:8080
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", http.HandlerFunc(
+		service.NewHTTP(l, "demo", "localhost:8080", http.HandlerFunc(
 			func(w http.ResponseWriter, r *http.Request) {
 				fmt.Println("current foo:", fooFn()) //nolint:forbidigo
 			}),

examples/roundtripwares/logger/server.go

@@ -4,6 +4,7 @@ import (
 	"net/http"
 
 	"github.com/foomo/keel"
+	"github.com/foomo/keel/service"
 )
 
 func server() {
@@ -26,7 +27,7 @@ func server() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs),
+		service.NewHTTP(l, "demo", "localhost:8080", svs),
 	)
 
 	svr.Run()

examples/roundtripwares/requestid/main.go

@@ -8,6 +8,7 @@ import (
 	keelhttp "github.com/foomo/keel/net/http"
 	"github.com/foomo/keel/net/http/middleware"
 	"github.com/foomo/keel/net/http/roundtripware"
+	"github.com/foomo/keel/service"
 	httputils "github.com/foomo/keel/utils/net/http"
 )
 
@@ -52,7 +53,7 @@ func main() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			// add middleware
 			middleware.RequestID(),
 			// add middleware

examples/roundtripwares/retry/server.go

@@ -4,6 +4,7 @@ import (
 	"net/http"
 
 	"github.com/foomo/keel"
+	"github.com/foomo/keel/service"
 )
 
 func server() {
@@ -27,7 +28,7 @@ func server() {
 	})
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs),
+		service.NewHTTP(l, "demo", "localhost:8080", svs),
 	)
 
 	svr.Run()

examples/serviceenabler/main.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/foomo/keel"
 	"github.com/foomo/keel/config"
+	"github.com/foomo/keel/service"
 )
 
 func main() {
@@ -23,7 +24,7 @@ func main() {
 	})
 
 	svr.AddServices(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080",
+		service.NewHTTP(l, "demo", "localhost:8080",
 			http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 				c.Set("service.enabled", !enabled())
 				w.WriteHeader(http.StatusOK)
@@ -32,7 +33,7 @@ func main() {
 		),
 		keel.NewServiceEnabler(l, "service-enabler",
 			func() keel.Service {
-				return keel.NewServiceHTTP(l, "service", "localhost:8081", svs)
+				return service.NewHTTP(l, "service", "localhost:8081", svs)
 			},
 			enabled,
 		),

examples/services/main.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"net/http"
 	"os"
 
 	"github.com/foomo/keel"
@@ -29,24 +28,11 @@ func main() {
 		keel.WithHTTPPProfService(false),
 	)
 
-	l := svr.Logger()
-
 	// alternatively you can add them manually
 	// svr.AddServices(keel.NewDefaultServiceHTTPZap())
 	// svr.AddServices(keel.NewDefaultServiceHTTPViper())
 	// svr.AddServices(keel.NewDefaultServiceHTTPPProf())
 	// svr.AddServices(keel.NewDefaultServiceHTTPPrometheus())
 
-	// create demo service
-	svs := http.NewServeMux()
-	svs.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(http.StatusOK)
-		_, _ = w.Write([]byte("OK"))
-	})
-
-	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", ":8080", svs),
-	)
-
 	svr.Run()
 }

examples/stream/jetstream/main.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 	"time"
 
+	"github.com/foomo/keel/service"
 	"github.com/nats-io/nats.go"
 	"github.com/pkg/errors"
 	"go.uber.org/zap"
@@ -89,7 +90,7 @@ func main() {
 	svr.AddClosers(subscription, stream)
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs),
+		service.NewHTTP(l, "demo", "localhost:8080", svs),
 	)
 
 	svr.Run()

examples/stream/jetstreamraw/main.go

@@ -4,6 +4,7 @@ import (
 	"net/http"
 	"time"
 
+	"github.com/foomo/keel/service"
 	"github.com/nats-io/nats.go"
 
 	"github.com/foomo/keel"
@@ -73,7 +74,7 @@ func main() {
 	svr.AddClosers(subscription, stream.Conn())
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs),
+		service.NewHTTP(l, "demo", "localhost:8080", svs),
 	)
 
 	svr.Run()

examples/telemetry/main.go

@@ -4,6 +4,9 @@ import (
 	"math/rand"
 	"net/http"
 
+	"github.com/foomo/keel/service"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/metric/instrument"
 
@@ -58,6 +61,14 @@ func main() {
 		})
 	}
 
+	promauto.NewCounter(prometheus.CounterOpts{
+		Namespace:   "foo",
+		Subsystem:   "",
+		Name:        "bar",
+		Help:        "blubb",
+		ConstLabels: nil,
+	})
+
 	{ // up down
 		upDown, err := meter.SyncInt64().UpDownCounter(
 			"a.updown",
@@ -92,7 +103,7 @@ func main() {
 	}
 
 	svr.AddService(
-		keel.NewServiceHTTP(l, "demo", "localhost:8080", svs,
+		service.NewHTTP(l, "demo", "localhost:8080", svs,
 			middleware.Telemetry(),
 			middleware.Recover(),
 		),

go.mod

@@ -5,6 +5,7 @@ go 1.20
 require (
 	github.com/avast/retry-go v3.0.0+incompatible
 	github.com/davecgh/go-spew v1.1.1
+	github.com/fbiville/markdown-table-formatter v0.3.0
 	github.com/foomo/gotsrpc/v2 v2.7.2
 	github.com/go-logr/logr v1.2.4
 	github.com/golang-jwt/jwt v3.2.2+incompatible

go.sum

@@ -117,6 +117,8 @@ github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5Kwzbycv
 github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
 github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=
 github.com/fatih/color v1.13.0/go.mod h1:kLAiJbzzSOZDVNGyDpeOxJ47H46qBXwg5ILebYFFOfk=
+github.com/fbiville/markdown-table-formatter v0.3.0 h1:PIm1UNgJrFs8q1htGTw+wnnNYvwXQMMMIKNZop2SSho=
+github.com/fbiville/markdown-table-formatter v0.3.0/go.mod h1:q89TDtSEVDdTaufgSbfHpNVdPU/bmfvqNkrC5HagmLY=
 github.com/felixge/httpsnoop v1.0.2 h1:+nS9g82KMXccJ/wp0zyRW9ZBHFETmMGtkk+2CTTrW4o=
 github.com/felixge/httpsnoop v1.0.2/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
 github.com/foomo/gotsrpc/v2 v2.7.2 h1:a94V/a8LSssq+aRN3Fv1lJPjWoyMilOvRq+yEaDTHVM=

healthz/docs.go

@@ -0,0 +1 @@
+package healthz

healthz/healthzer.go

@@ -1,4 +1,4 @@
-package keel
+package healthz
 
 import "context"
 
@@ -16,6 +16,10 @@ func (h healther) Healthz(ctx context.Context) error {
 	return h.handle(ctx)
 }
 
+func (h healther) Close(ctx context.Context) error {
+	return h.handle(ctx)
+}
+
 // BoolHealthzer interface
 type BoolHealthzer interface {
 	Healthz() bool

healthz/type.go

@@ -1,31 +1,31 @@
-package keel
+package healthz
 
-// HealthzType type
+// Type type
 // https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/
-type HealthzType string
+type Type string
 
 const (
-	// HealthzTypeAlways will run on any checks
-	HealthzTypeAlways HealthzType = "always"
-	// HealthzTypeStartup will run on /healthz/startup checks
+	// TypeAlways will run on any checks
+	TypeAlways Type = "always"
+	// TypeStartup will run on /healthz/startup checks
 	// > The kubelet uses startup probes to know when a container application has started. If such a probe is configured,
 	// > it disables liveness and readiness checks until it succeeds, making sure those probes don't interfere with the
 	// > application startup. This can be used to adopt liveness checks on slow starting containers, avoiding them getting
 	// > killed by the kubelet before they are up and running.
-	HealthzTypeStartup HealthzType = "startup"
-	// HealthzTypeReadiness will run on /healthz/readiness checks
+	TypeStartup Type = "startup"
+	// TypeReadiness will run on /healthz/readiness checks
 	// > The kubelet uses readiness probes to know when a container is ready to start accepting traffic.
 	// > A Pod is considered ready when all of its containers are ready. One use of this signal is to control
 	// > which Pods are used as backends for Services. When a Pod is not ready, it is removed from Service load balancers.
-	HealthzTypeReadiness HealthzType = "readiness"
-	// HealthzTypeLiveness  will run on /healthz/liveness checks
+	TypeReadiness Type = "readiness"
+	// TypeLiveness  will run on /healthz/liveness checks
 	// > The kubelet uses liveness probes to know when to restart a container. For example, liveness probes could catch
 	// > a deadlock, where an application is running, but unable to make progress. Restarting a container in such a state
 	// > can help to make the application more available despite bugs.
-	HealthzTypeLiveness HealthzType = "liveness"
+	TypeLiveness Type = "liveness"
 )
 
 // String interface
-func (t HealthzType) String() string {
+func (t Type) String() string {
 	return string(t)
 }

interfaces/closer.go

@@ -1,6 +1,8 @@
-package keel
+package interfaces
 
-import "context"
+import (
+	"context"
+)
 
 type closer struct {
 	handle func(context.Context) error
@@ -12,10 +14,6 @@ func NewCloserFn(handle func(context.Context) error) closer {
 	}
 }
 
-func (h healther) Close(ctx context.Context) error {
-	return h.handle(ctx)
-}
-
 // Closer interface
 type Closer interface {
 	Close()

interfaces/doc.go

@@ -0,0 +1 @@
+package interfaces

interfaces/pinger.go

@@ -1,4 +1,4 @@
-package keel
+package interfaces
 
 import "context"
 

interfaces/shutdowner.go

@@ -1,4 +1,4 @@
-package keel
+package interfaces
 
 import "context"
 

interfaces/stopper.go

@@ -1,4 +1,4 @@
-package keel
+package interfaces
 
 import "context"
 

interfaces/unsubscriber.go

@@ -1,4 +1,4 @@
-package keel
+package interfaces
 
 import "context"
 

log/fields_keel.go

@@ -0,0 +1,11 @@
+package log
+
+import (
+	"go.opentelemetry.io/otel/attribute"
+)
+
+const (
+	KeelServiceTypeKey = attribute.Key("keel.service.type")
+	KeelServiceNameKey = attribute.Key("keel.service.name")
+	KeelServiceInstKey = attribute.Key("keel.service.inst")
+)

log/fields_service.go

@@ -15,6 +15,8 @@ func FPeerService(name string) zap.Field {
 }
 
 const (
+	ServiceTypeKey = "service_type"
+
 	// ServiceNameKey represents the NameKey of the service.
 	ServiceNameKey = "service_name"
 
@@ -35,6 +37,10 @@ const (
 	ServiceVersionKey = "service_version"
 )
 
+func FServiceType(name string) zap.Field {
+	return zap.String(ServiceTypeKey, name)
+}
+
 func FServiceName(name string) zap.Field {
 	return zap.String(ServiceNameKey, name)
 }

log/with.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"strings"
 
+	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/trace"
 	"go.uber.org/zap"
 
@@ -20,6 +21,17 @@ func With(l *zap.Logger, fields ...zap.Field) *zap.Logger {
 	return l.With(fields...)
 }
 
+func WithAttributes(l *zap.Logger, attrs ...attribute.KeyValue) *zap.Logger {
+	if l == nil {
+		l = Logger()
+	}
+	fields := make([]zap.Field, len(attrs))
+	for i, attr := range attrs {
+		fields[i] = zap.Any(strings.ReplaceAll(string(attr.Key), ".", "_"), attr.Value.AsInterface())
+	}
+	return l.With(fields...)
+}
+
 func WithError(l *zap.Logger, err error) *zap.Logger {
 	return With(l, FErrorType(err), FError(err))
 }

option.go

@@ -5,6 +5,7 @@ import (
 	"os"
 	"time"
 
+	"github.com/foomo/keel/service"
 	"github.com/spf13/viper"
 	"go.uber.org/zap"
 
@@ -72,9 +73,9 @@ func WithShutdownTimeout(shutdownTimeout time.Duration) Option {
 func WithHTTPZapService(enabled bool) Option {
 	return func(inst *Server) {
 		if config.GetBool(inst.Config(), "service.zap.enabled", enabled)() {
-			service := NewDefaultServiceHTTPZap()
-			inst.initServices = append(inst.initServices, service)
-			inst.AddAlwaysHealthzers(service)
+			svs := service.NewDefaultHTTPZap()
+			inst.initServices = append(inst.initServices, svs)
+			inst.AddAlwaysHealthzers(svs)
 		}
 	}
 }
@@ -83,9 +84,9 @@ func WithHTTPZapService(enabled bool) Option {
 func WithHTTPViperService(enabled bool) Option {
 	return func(inst *Server) {
 		if config.GetBool(inst.Config(), "service.viper.enabled", enabled)() {
-			service := NewDefaultServiceHTTPViper()
-			inst.initServices = append(inst.initServices, service)
-			inst.AddAlwaysHealthzers(service)
+			svs := service.NewDefaultHTTPViper()
+			inst.initServices = append(inst.initServices, svs)
+			inst.AddAlwaysHealthzers(svs)
 		}
 	}
 }
@@ -149,9 +150,9 @@ func WithPrometheusMeter(enabled bool) Option {
 func WithHTTPPrometheusService(enabled bool) Option {
 	return func(inst *Server) {
 		if config.GetBool(inst.Config(), "service.prometheus.enabled", enabled)() {
-			service := NewDefaultServiceHTTPPrometheus()
-			inst.initServices = append(inst.initServices, service)
-			inst.AddAlwaysHealthzers(service)
+			svs := service.NewDefaultHTTPPrometheus()
+			inst.initServices = append(inst.initServices, svs)
+			inst.AddAlwaysHealthzers(svs)
 		}
 	}
 }
@@ -160,9 +161,9 @@ func WithHTTPPrometheusService(enabled bool) Option {
 func WithHTTPPProfService(enabled bool) Option {
 	return func(inst *Server) {
 		if config.GetBool(inst.Config(), "service.pprof.enabled", enabled)() {
-			service := NewDefaultServiceHTTPPProf()
-			inst.initServices = append(inst.initServices, service)
-			inst.AddAlwaysHealthzers(service)
+			svs := service.NewDefaultHTTPPProf()
+			inst.initServices = append(inst.initServices, svs)
+			inst.AddAlwaysHealthzers(svs)
 		}
 	}
 }
@@ -171,9 +172,9 @@ func WithHTTPPProfService(enabled bool) Option {
 func WithHTTPHealthzService(enabled bool) Option {
 	return func(inst *Server) {
 		if config.GetBool(inst.Config(), "service.healthz.enabled", enabled)() {
-			service := NewDefaultServiceHTTPProbes(inst.probes)
-			inst.initServices = append(inst.initServices, service)
-			inst.AddAlwaysHealthzers(service)
+			svs := service.NewDefaultHTTPProbes(inst.probes)
+			inst.initServices = append(inst.initServices, svs)
+			inst.AddAlwaysHealthzers(svs)
 		}
 	}
 }

server.go

@@ -1,3 +1,6 @@
+//go:build !docs
+// +build !docs
+
 package keel
 
 import (
@@ -10,6 +13,8 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/foomo/keel/healthz"
+	"github.com/foomo/keel/interfaces"
 	"github.com/go-logr/logr"
 	"github.com/pkg/errors"
 	"github.com/spf13/viper"
@@ -40,7 +45,7 @@ type Server struct {
 	shutdownTimeout time.Duration
 	running         atomic.Bool
 	closers         []interface{}
-	probes          map[HealthzType][]interface{}
+	probes          map[healthz.Type][]interface{}
 	ctx             context.Context
 	ctxCancel       context.Context
 	ctxCancelFn     context.CancelFunc
@@ -54,7 +59,7 @@ func NewServer(opts ...Option) *Server {
 	inst := &Server{
 		shutdownTimeout: 30 * time.Second,
 		shutdownSignals: []os.Signal{os.Interrupt, syscall.SIGTERM},
-		probes:          map[HealthzType][]interface{}{},
+		probes:          map[healthz.Type][]interface{}{},
 		ctx:             context.Background(),
 		c:               config.Config(),
 		l:               log.Logger(),
@@ -83,51 +88,51 @@ func NewServer(opts ...Option) *Server {
 			for _, closer := range closers {
 				l := inst.l.With(log.FName(fmt.Sprintf("%T", closer)))
 				switch c := closer.(type) {
-				case Closer:
+				case interfaces.Closer:
 					c.Close()
-				case ErrorCloser:
+				case interfaces.ErrorCloser:
 					if err := c.Close(); err != nil {
 						log.WithError(l, err).Error("failed to gracefully stop ErrorCloser")
 					}
-				case CloserWithContext:
+				case interfaces.CloserWithContext:
 					c.Close(timeoutCtx)
-				case ErrorCloserWithContext:
+				case interfaces.ErrorCloserWithContext:
 					if err := c.Close(timeoutCtx); err != nil {
 						log.WithError(l, err).Error("failed to gracefully stop ErrorCloserWithContext")
 					}
-				case Shutdowner:
+				case interfaces.Shutdowner:
 					c.Shutdown()
-				case ErrorShutdowner:
+				case interfaces.ErrorShutdowner:
 					if err := c.Shutdown(); err != nil {
 						log.WithError(l, err).Error("failed to gracefully stop ErrorShutdowner")
 					}
-				case ShutdownerWithContext:
+				case interfaces.ShutdownerWithContext:
 					c.Shutdown(timeoutCtx)
-				case ErrorShutdownerWithContext:
+				case interfaces.ErrorShutdownerWithContext:
 					if err := c.Shutdown(timeoutCtx); err != nil {
 						log.WithError(l, err).Error("failed to gracefully stop ErrorShutdownerWithContext")
 					}
-				case Stopper:
+				case interfaces.Stopper:
 					c.Stop()
-				case ErrorStopper:
+				case interfaces.ErrorStopper:
 					if err := c.Stop(); err != nil {
 						log.WithError(l, err).Error("failed to gracefully stop ErrorStopper")
 					}
-				case StopperWithContext:
+				case interfaces.StopperWithContext:
 					c.Stop(timeoutCtx)
-				case ErrorStopperWithContext:
+				case interfaces.ErrorStopperWithContext:
 					if err := c.Stop(timeoutCtx); err != nil {
 						log.WithError(l, err).Error("failed to gracefully stop ErrorStopperWithContext")
 					}
-				case Unsubscriber:
+				case interfaces.Unsubscriber:
 					c.Unsubscribe()
-				case ErrorUnsubscriber:
+				case interfaces.ErrorUnsubscriber:
 					if err := c.Unsubscribe(); err != nil {
 						log.WithError(l, err).Error("failed to gracefully stop ErrorUnsubscriber")
 					}
-				case UnsubscriberWithContext:
+				case interfaces.UnsubscriberWithContext:
 					c.Unsubscribe(timeoutCtx)
-				case ErrorUnsubscriberWithContext:
+				case interfaces.ErrorUnsubscriberWithContext:
 					if err := c.Unsubscribe(timeoutCtx); err != nil {
 						log.WithError(l, err).Error("failed to gracefully stop ErrorUnsubscriberWithContext")
 					}
@@ -229,22 +234,22 @@ func (s *Server) AddCloser(closer interface{}) {
 		}
 	}
 	switch closer.(type) {
-	case Closer,
-		ErrorCloser,
-		CloserWithContext,
-		ErrorCloserWithContext,
-		Shutdowner,
-		ErrorShutdowner,
-		ShutdownerWithContext,
-		ErrorShutdownerWithContext,
-		Stopper,
-		ErrorStopper,
-		StopperWithContext,
-		ErrorStopperWithContext,
-		Unsubscriber,
-		ErrorUnsubscriber,
-		UnsubscriberWithContext,
-		ErrorUnsubscriberWithContext:
+	case interfaces.Closer,
+		interfaces.ErrorCloser,
+		interfaces.CloserWithContext,
+		interfaces.ErrorCloserWithContext,
+		interfaces.Shutdowner,
+		interfaces.ErrorShutdowner,
+		interfaces.ShutdownerWithContext,
+		interfaces.ErrorShutdownerWithContext,
+		interfaces.Stopper,
+		interfaces.ErrorStopper,
+		interfaces.StopperWithContext,
+		interfaces.ErrorStopperWithContext,
+		interfaces.Unsubscriber,
+		interfaces.ErrorUnsubscriber,
+		interfaces.UnsubscriberWithContext,
+		interfaces.ErrorUnsubscriberWithContext:
 		s.closers = append(s.closers, closer)
 	default:
 		s.l.Warn("unable to add closer", log.FValue(fmt.Sprintf("%T", closer)))
@@ -259,14 +264,14 @@ func (s *Server) AddClosers(closers ...interface{}) {
 }
 
 // AddHealthzer adds a probe to be called on healthz checks
-func (s *Server) AddHealthzer(typ HealthzType, probe interface{}) {
+func (s *Server) AddHealthzer(typ healthz.Type, probe interface{}) {
 	switch probe.(type) {
-	case BoolHealthzer,
-		BoolHealthzerWithContext,
-		ErrorHealthzer,
-		ErrorHealthzWithContext,
-		ErrorPinger,
-		ErrorPingerWithContext:
+	case healthz.BoolHealthzer,
+		healthz.BoolHealthzerWithContext,
+		healthz.ErrorHealthzer,
+		healthz.ErrorHealthzWithContext,
+		interfaces.ErrorPinger,
+		interfaces.ErrorPingerWithContext:
 		s.probes[typ] = append(s.probes[typ], probe)
 	default:
 		s.l.Debug("not a healthz probe", log.FValue(fmt.Sprintf("%T", probe)))
@@ -274,7 +279,7 @@ func (s *Server) AddHealthzer(typ HealthzType, probe interface{}) {
 }
 
 // AddHealthzers adds the given probes to be called on healthz checks
-func (s *Server) AddHealthzers(typ HealthzType, probes ...interface{}) {
+func (s *Server) AddHealthzers(typ healthz.Type, probes ...interface{}) {
 	for _, probe := range probes {
 		s.AddHealthzer(typ, probe)
 	}
@@ -282,22 +287,22 @@ func (s *Server) AddHealthzers(typ HealthzType, probes ...interface{}) {
 
 // AddAlwaysHealthzers adds the probes to be called on any healthz checks
 func (s *Server) AddAlwaysHealthzers(probes ...interface{}) {
-	s.AddHealthzers(HealthzTypeAlways, probes...)
+	s.AddHealthzers(healthz.TypeAlways, probes...)
 }
 
 // AddStartupHealthzers adds the startup probes to be called on healthz checks
 func (s *Server) AddStartupHealthzers(probes ...interface{}) {
-	s.AddHealthzers(HealthzTypeStartup, probes...)
+	s.AddHealthzers(healthz.TypeStartup, probes...)
 }
 
 // AddLivenessHealthzers adds the liveness probes to be called on healthz checks
 func (s *Server) AddLivenessHealthzers(probes ...interface{}) {
-	s.AddHealthzers(HealthzTypeLiveness, probes...)
+	s.AddHealthzers(healthz.TypeLiveness, probes...)
 }
 
 // AddReadinessHealthzers adds the readiness probes to be called on healthz checks
 func (s *Server) AddReadinessHealthzers(probes ...interface{}) {
-	s.AddHealthzers(HealthzTypeReadiness, probes...)
+	s.AddHealthzers(healthz.TypeReadiness, probes...)
 }
 
 // IsCanceled returns true if the internal errgroup has been canceled

server_docs.go

@@ -0,0 +1,435 @@
+//go:build docs
+// +build docs
+
+package keel
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"reflect"
+	"sort"
+	"time"
+
+	markdowntable "github.com/fbiville/markdown-table-formatter/pkg/markdown"
+	"github.com/foomo/keel/config"
+	"github.com/foomo/keel/healthz"
+	"github.com/foomo/keel/interfaces"
+	"github.com/foomo/keel/log"
+	"github.com/foomo/keel/service"
+	"github.com/foomo/keel/telemetry/nonrecording"
+	"github.com/pkg/errors"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/spf13/viper"
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/metric"
+	otelglobal "go.opentelemetry.io/otel/metric/global"
+	"go.opentelemetry.io/otel/trace"
+	"go.uber.org/zap"
+)
+
+// Server struct
+type Server struct {
+	services        []Service
+	initServices    []Service
+	meter           metric.Meter
+	meterProvider   metric.MeterProvider
+	tracer          trace.Tracer
+	traceProvider   trace.TracerProvider
+	shutdownSignals []os.Signal
+	shutdownTimeout time.Duration
+	closers         []interface{}
+	probes          map[healthz.Type][]interface{}
+	ctx             context.Context
+	gCtx            context.Context
+	l               *zap.Logger
+	c               *viper.Viper
+}
+
+func NewServer(opts ...Option) *Server {
+	inst := &Server{
+		probes:        map[healthz.Type][]interface{}{},
+		meterProvider: nonrecording.NewNoopMeterProvider(),
+		traceProvider: trace.NewNoopTracerProvider(),
+		ctx:           context.Background(),
+		c:             config.Config(),
+		l:             log.Logger(),
+	}
+
+	inst.meter = inst.meterProvider.Meter("")
+	otelglobal.SetMeterProvider(inst.meterProvider)
+	inst.tracer = inst.traceProvider.Tracer("")
+	otel.SetTracerProvider(inst.traceProvider)
+
+	// add probe
+	inst.AddAlwaysHealthzers(inst)
+
+	return inst
+}
+
+// Logger returns server logger
+func (s *Server) Logger() *zap.Logger {
+	return s.l
+}
+
+// Meter returns the implementation meter
+func (s *Server) Meter() metric.Meter {
+	return s.meter
+}
+
+// Tracer returns the implementation tracer
+func (s *Server) Tracer() trace.Tracer {
+	return s.tracer
+}
+
+// Config returns server config
+func (s *Server) Config() *viper.Viper {
+	return s.c
+}
+
+// Context returns server context
+func (s *Server) Context() context.Context {
+	return s.ctx
+}
+
+// CancelContext returns server's cancel context
+func (s *Server) CancelContext() context.Context {
+	return s.ctx
+}
+
+// AddService add a single service
+func (s *Server) AddService(service Service) {
+	for _, value := range s.services {
+		if value == service {
+			return
+		}
+	}
+	s.services = append(s.services, service)
+	s.AddAlwaysHealthzers(service)
+	s.AddCloser(service)
+}
+
+// AddServices adds multiple service
+func (s *Server) AddServices(services ...Service) {
+	for _, service := range services {
+		s.AddService(service)
+	}
+}
+
+// AddCloser adds a closer to be called on shutdown
+func (s *Server) AddCloser(closer interface{}) {
+	for _, value := range s.closers {
+		if value == closer {
+			return
+		}
+	}
+	switch closer.(type) {
+	case interfaces.Closer,
+		interfaces.ErrorCloser,
+		interfaces.CloserWithContext,
+		interfaces.ErrorCloserWithContext,
+		interfaces.Shutdowner,
+		interfaces.ErrorShutdowner,
+		interfaces.ShutdownerWithContext,
+		interfaces.ErrorShutdownerWithContext,
+		interfaces.Stopper,
+		interfaces.ErrorStopper,
+		interfaces.StopperWithContext,
+		interfaces.ErrorStopperWithContext,
+		interfaces.Unsubscriber,
+		interfaces.ErrorUnsubscriber,
+		interfaces.UnsubscriberWithContext,
+		interfaces.ErrorUnsubscriberWithContext:
+		s.closers = append(s.closers, closer)
+	default:
+		s.l.Warn("unable to add closer", log.FValue(fmt.Sprintf("%T", closer)))
+	}
+}
+
+// AddClosers adds the given closers to be called on shutdown
+func (s *Server) AddClosers(closers ...interface{}) {
+	for _, closer := range closers {
+		s.AddCloser(closer)
+	}
+}
+
+// AddHealthzer adds a probe to be called on healthz checks
+func (s *Server) AddHealthzer(typ healthz.Type, probe interface{}) {
+	switch probe.(type) {
+	case healthz.BoolHealthzer,
+		healthz.BoolHealthzerWithContext,
+		healthz.ErrorHealthzer,
+		healthz.ErrorHealthzWithContext,
+		interfaces.ErrorPinger,
+		interfaces.ErrorPingerWithContext:
+		s.probes[typ] = append(s.probes[typ], probe)
+	default:
+		s.l.Debug("not a healthz probe", log.FValue(fmt.Sprintf("%T", probe)))
+	}
+}
+
+// AddHealthzers adds the given probes to be called on healthz checks
+func (s *Server) AddHealthzers(typ healthz.Type, probes ...interface{}) {
+	for _, probe := range probes {
+		s.AddHealthzer(typ, probe)
+	}
+}
+
+// AddAlwaysHealthzers adds the probes to be called on any healthz checks
+func (s *Server) AddAlwaysHealthzers(probes ...interface{}) {
+	s.AddHealthzers(healthz.TypeAlways, probes...)
+}
+
+// AddStartupHealthzers adds the startup probes to be called on healthz checks
+func (s *Server) AddStartupHealthzers(probes ...interface{}) {
+	s.AddHealthzers(healthz.TypeStartup, probes...)
+}
+
+// AddLivenessHealthzers adds the liveness probes to be called on healthz checks
+func (s *Server) AddLivenessHealthzers(probes ...interface{}) {
+	s.AddHealthzers(healthz.TypeLiveness, probes...)
+}
+
+// AddReadinessHealthzers adds the readiness probes to be called on healthz checks
+func (s *Server) AddReadinessHealthzers(probes ...interface{}) {
+	s.AddHealthzers(healthz.TypeReadiness, probes...)
+}
+
+// IsCanceled returns true if the internal errgroup has been canceled
+func (s *Server) IsCanceled() bool {
+	return errors.Is(s.gCtx.Err(), context.Canceled)
+}
+
+// Healthz returns true if the server is running
+func (s *Server) Healthz() error {
+	return nil
+}
+
+// Run runs the server
+func (s *Server) Run() {
+	// add init services to closers
+	for _, initService := range s.initServices {
+		s.AddClosers(initService)
+	}
+
+	md := &MD{}
+
+	{
+		var rows [][]string
+		for _, key := range s.Config().AllKeys() {
+			rows = append(rows, []string{
+				code(key),
+				code(s.Config().GetString(key)),
+			})
+		}
+		if len(rows) > 0 {
+			md.Println("## Config")
+			md.Println("")
+			md.Println("List of all registered config variabled with their defaults.")
+			md.Println("")
+			md.Table([]string{"Key", "Default"}, rows)
+			md.Println("")
+		}
+	}
+
+	{
+		var rows [][]string
+		for _, value := range s.initServices {
+			if v, ok := value.(*service.HTTP); ok {
+				t := reflect.TypeOf(v)
+				rows = append(rows, []string{
+					code(v.Name()),
+					code(t.String()),
+					stringer(v),
+				})
+			}
+		}
+		if len(rows) > 0 {
+			md.Println("## Init Services")
+			md.Println("")
+			md.Println("List of all registerd init services that are being immediately started.")
+			md.Println("")
+			md.Table([]string{"Name", "Type", "Address"}, rows)
+			md.Println("")
+		}
+	}
+
+	{
+		var rows [][]string
+		for _, value := range s.services {
+			if v, ok := value.(*service.HTTP); ok {
+				t := reflect.TypeOf(v)
+				rows = append(rows, []string{
+					code(v.Name()),
+					code(t.String()),
+					stringer(v),
+				})
+			}
+		}
+		if len(rows) > 0 {
+			md.Println("## Services")
+			md.Println("")
+			md.Println("List of all registered services that are being started.")
+			md.Println("")
+			md.Table([]string{"Name", "Type", "Description"}, rows)
+			md.Println("")
+		}
+	}
+
+	{
+		var rows [][]string
+		for k, probes := range s.probes {
+			for _, probe := range probes {
+				t := reflect.TypeOf(probe)
+				rows = append(rows, []string{
+					code(k.String()),
+					code(t.String()),
+				})
+			}
+		}
+		if len(rows) > 0 {
+			md.Println("## Health probes")
+			md.Println("")
+			md.Println("List of all registered healthz probes that are being called during startup and runntime.")
+			md.Println("")
+			md.Table([]string{"Name", "Type"}, rows)
+			md.Println("")
+		}
+	}
+
+	{
+		var rows [][]string
+		for _, value := range s.closers {
+			t := reflect.TypeOf(value)
+			var closer string
+			switch value.(type) {
+			case interfaces.Closer:
+				closer = "Closer"
+			case interfaces.ErrorCloser:
+				closer = "ErrorCloser"
+			case interfaces.CloserWithContext:
+				closer = "CloserWithContext"
+			case interfaces.ErrorCloserWithContext:
+				closer = "ErrorCloserWithContext"
+			case interfaces.Shutdowner:
+				closer = "Shutdowner"
+			case interfaces.ErrorShutdowner:
+				closer = "ErrorShutdowner"
+			case interfaces.ShutdownerWithContext:
+				closer = "ShutdownerWithContext"
+			case interfaces.ErrorShutdownerWithContext:
+				closer = "ErrorShutdownerWithContext"
+			case interfaces.Stopper:
+				closer = "Stopper"
+			case interfaces.ErrorStopper:
+				closer = "ErrorStopper"
+			case interfaces.StopperWithContext:
+				closer = "StopperWithContext"
+			case interfaces.ErrorStopperWithContext:
+				closer = "ErrorStopperWithContext"
+			case interfaces.Unsubscriber:
+				closer = "Unsubscriber"
+			case interfaces.ErrorUnsubscriber:
+				closer = "ErrorUnsubscriber"
+			case interfaces.UnsubscriberWithContext:
+				closer = "UnsubscriberWithContext"
+			case interfaces.ErrorUnsubscriberWithContext:
+				closer = "ErrorUnsubscriberWithContext"
+			}
+			rows = append(rows, []string{
+				code(t.String()),
+				code(closer),
+			})
+		}
+		if len(rows) > 0 {
+			md.Println("## Closers")
+			md.Println("")
+			md.Println("List of all registered closers that are being called during graceful shutdown.")
+			md.Println("")
+			md.Table([]string{"Name", "Type"}, rows)
+			md.Println("")
+		}
+	}
+
+	{
+		var rows [][]string
+		s.meter.AsyncFloat64()
+
+		var names []string
+		values := map[string]nonrecording.Metric{}
+		for _, value := range nonrecording.Metrics() {
+			names = append(names, value.Name)
+			values[value.Name] = value
+		}
+
+		gatherer, _ := prometheus.DefaultRegisterer.(*prometheus.Registry).Gather()
+		for _, value := range gatherer {
+			names = append(names, value.GetName())
+			values[value.GetName()] = nonrecording.Metric{
+				Name: value.GetName(),
+				Type: value.GetType().String(),
+				Help: value.GetHelp(),
+			}
+		}
+		sort.Strings(names)
+		for _, name := range names {
+			value := values[name]
+			rows = append(rows, []string{
+				code(value.Name),
+				value.Type,
+				value.Help,
+			})
+		}
+		if len(rows) > 0 {
+			md.Println("## Metrics")
+			md.Println("")
+			md.Println("List of all registered metrics than are being exposed.")
+			md.Println("")
+			md.Table([]string{"Name", "Type", "Description"}, rows)
+			md.Println("")
+		}
+	}
+
+	fmt.Print(md.String())
+}
+
+type MD struct {
+	value string
+}
+
+func (s *MD) Println(a ...any) {
+	s.value += fmt.Sprintln(a...)
+}
+
+func (s *MD) Print(a ...any) {
+	s.value += fmt.Sprint(a...)
+}
+
+func (s *MD) String() string {
+	return s.value
+}
+
+func (s *MD) Table(headers []string, rows [][]string) {
+	table, err := markdowntable.NewTableFormatterBuilder().
+		WithPrettyPrint().
+		Build(headers...).
+		Format(rows)
+	if err != nil {
+		panic(err)
+	}
+	s.Print(table)
+}
+
+func code(v string) string {
+	if v == "" {
+		return ""
+	}
+	return "`" + v + "`"
+}
+
+func stringer(v any) string {
+	if i, ok := v.(fmt.Stringer); ok {
+		return i.String()
+	}
+	return ""
+}

server_test.go

@@ -10,6 +10,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/foomo/keel/service"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/suite"
 	"go.uber.org/zap"
@@ -74,7 +75,7 @@ func (s *KeelTestSuite) TearDownSuite() {}
 
 func (s *KeelTestSuite) TestServiceHTTP() {
 	s.svr.AddServices(
-		keel.NewServiceHTTP(s.l, "test", ":55000", s.mux),
+		service.NewHTTP(s.l, "test", ":55000", s.mux),
 	)
 
 	s.runServer()
@@ -86,8 +87,8 @@ func (s *KeelTestSuite) TestServiceHTTP() {
 
 func (s *KeelTestSuite) TestServiceHTTPZap() {
 	s.svr.AddServices(
-		keel.NewServiceHTTPZap(s.l, "zap", ":9100", "/log"),
-		keel.NewServiceHTTP(s.l, "test", ":55000", s.mux),
+		service.NewHTTPZap(s.l, "zap", ":9100", "/log"),
+		service.NewHTTP(s.l, "test", ":55000", s.mux),
 	)
 
 	s.runServer()
@@ -141,7 +142,7 @@ func (s *KeelTestSuite) TestServiceHTTPZap() {
 
 func (s *KeelTestSuite) TestGraceful() {
 	s.svr.AddServices(
-		keel.NewServiceHTTP(s.l, "test", ":55000", s.mux),
+		service.NewHTTP(s.l, "test", ":55000", s.mux),
 	)
 
 	s.runServer()

service/errors.go

@@ -0,0 +1,10 @@
+package service
+
+import (
+	"github.com/pkg/errors"
+)
+
+var (
+	ErrServiceNotRunning = errors.New("service not running")
+	ErrServiceShutdown   = errors.New("service shutdown")
+)

service/goroutine.go

@@ -0,0 +1,94 @@
+package service
+
+import (
+	"context"
+	"fmt"
+	"sync/atomic"
+
+	"go.uber.org/zap"
+	"golang.org/x/sync/errgroup"
+
+	"github.com/foomo/keel/log"
+)
+
+// GoRoutine struct
+type (
+	GoRoutine struct {
+		running  atomic.Bool
+		handler  GoRoutineFn
+		cancel   context.CancelCauseFunc
+		parallel int
+		name     string
+		wg       errgroup.Group
+		l        *zap.Logger
+	}
+	GoRoutineOption func(*GoRoutine)
+	GoRoutineFn     func(ctx context.Context, l *zap.Logger) error
+)
+
+func NewGoRoutine(l *zap.Logger, name string, handler GoRoutineFn) *GoRoutine {
+	if l == nil {
+		l = log.Logger()
+	}
+	// enrich the log
+	l = log.WithAttributes(l,
+		log.KeelServiceTypeKey.String("goroutine"),
+		log.KeelServiceNameKey.String(name),
+	)
+
+	return &GoRoutine{
+		handler:  handler,
+		name:     name,
+		parallel: 1,
+		l:        l,
+	}
+}
+
+// ------------------------------------------------------------------------------------------------
+// ~ Options
+// ------------------------------------------------------------------------------------------------
+
+func GoRoutineWithPralllel(v int) GoRoutineOption {
+	return func(o *GoRoutine) {
+		o.parallel = v
+	}
+}
+
+// ------------------------------------------------------------------------------------------------
+// ~ Public methods
+// ------------------------------------------------------------------------------------------------
+
+func (s *GoRoutine) Name() string {
+	return s.name
+}
+
+func (s *GoRoutine) Healthz() error {
+	if !s.running.Load() {
+		return ErrServiceNotRunning
+	}
+	return nil
+}
+
+func (s *GoRoutine) String() string {
+	return fmt.Sprintf("parallel: `%d`", s.parallel)
+}
+
+func (s *GoRoutine) Start(ctx context.Context) error {
+	s.l.Info("starting keel service")
+	ctx, cancel := context.WithCancelCause(ctx)
+	s.cancel = cancel
+	for i := 0; i < s.parallel; i++ {
+		i := i
+		l := log.WithAttributes(s.l, log.KeelServiceInstKey.Int(i))
+		s.wg.Go(func() error {
+			return s.handler(ctx, l)
+		})
+	}
+	return s.wg.Wait()
+}
+
+func (s *GoRoutine) Close(ctx context.Context) error {
+	s.l.Info("stopping keel service")
+	s.cancel(ErrServiceShutdown)
+	return s.wg.Wait()
+}

service/goroutine_test.go

@@ -0,0 +1,47 @@
+package service_test
+
+import (
+	"context"
+	"time"
+
+	"github.com/foomo/keel"
+	"github.com/foomo/keel/service"
+	"github.com/pkg/errors"
+	"go.uber.org/zap"
+)
+
+func ExampleNewGoRoutine() {
+	shutdown(3 * time.Second)
+
+	svr := keel.NewServer(
+		keel.WithLogger(zap.NewExample()),
+	)
+
+	svr.AddService(
+		service.NewGoRoutine(svr.Logger(), "demo", func(ctx context.Context, l *zap.Logger) error {
+			for {
+				if err := ctx.Err(); errors.Is(context.Cause(ctx), service.ErrServiceShutdown) {
+					l.Info("context has been canceled du to graceful shutdow")
+					return nil
+				} else if err != nil {
+					return errors.Wrap(err, "unexpected context error")
+				}
+				l.Info("ping")
+				time.Sleep(time.Second)
+			}
+		}),
+	)
+
+	svr.Run()
+
+	// Output:
+	// {"level":"info","msg":"starting keel server"}
+	// {"level":"info","msg":"starting keel service","keel_service_type":"goroutine","keel_service_name":"demo"}
+	// {"level":"info","msg":"ping","keel_service_type":"goroutine","keel_service_name":"demo","keel_service_inst":0}
+	// {"level":"info","msg":"ping","keel_service_type":"goroutine","keel_service_name":"demo","keel_service_inst":0}
+	// {"level":"info","msg":"ping","keel_service_type":"goroutine","keel_service_name":"demo","keel_service_inst":0}
+	// {"level":"debug","msg":"keel graceful shutdown"}
+	// {"level":"info","msg":"stopping keel service","keel_service_type":"goroutine","keel_service_name":"demo"}
+	// {"level":"info","msg":"context has been canceled du to graceful shutdow","keel_service_type":"goroutine","keel_service_name":"demo","keel_service_inst":0}
+	// {"level":"info","msg":"keel server stopped"}
+}

service/helper_test.go

@@ -0,0 +1,14 @@
+package service_test
+
+import (
+	"syscall"
+	"time"
+)
+
+// shutdown example after the given time
+func shutdown(duration time.Duration) {
+	go func() {
+		time.Sleep(duration)
+		_ = syscall.Kill(syscall.Getpid(), syscall.SIGINT)
+	}()
+}

service/http.go

@@ -1,7 +1,8 @@
-package keel
+package service
 
 import (
 	"context"
+	"fmt"
 	"net"
 	"net/http"
 	"strings"
@@ -14,22 +15,25 @@ import (
 	"github.com/foomo/keel/net/http/middleware"
 )
 
-// ServiceHTTP struct
-type ServiceHTTP struct {
+// HTTP struct
+type HTTP struct {
 	running atomic.Bool
 	server  *http.Server
 	name    string
 	l       *zap.Logger
 }
 
-func NewServiceHTTP(l *zap.Logger, name, addr string, handler http.Handler, middlewares ...middleware.Middleware) *ServiceHTTP {
+func NewHTTP(l *zap.Logger, name, addr string, handler http.Handler, middlewares ...middleware.Middleware) *HTTP {
 	if l == nil {
 		l = log.Logger()
 	}
 	// enrich the log
-	l = log.WithHTTPServerName(l, name)
+	l = log.WithAttributes(l,
+		log.KeelServiceTypeKey.String("http"),
+		log.KeelServiceNameKey.String(name),
+	)
 
-	return &ServiceHTTP{
+	return &HTTP{
 		server: &http.Server{
 			Addr:     addr,
 			ErrorLog: zap.NewStdLog(l),
@@ -40,18 +44,22 @@ func NewServiceHTTP(l *zap.Logger, name, addr string, handler http.Handler, midd
 	}
 }
 
-func (s *ServiceHTTP) Name() string {
+func (s *HTTP) Name() string {
 	return s.name
 }
 
-func (s *ServiceHTTP) Healthz() error {
+func (s *HTTP) Healthz() error {
 	if !s.running.Load() {
 		return ErrServiceNotRunning
 	}
 	return nil
 }
 
-func (s *ServiceHTTP) Start(ctx context.Context) error {
+func (s *HTTP) String() string {
+	return fmt.Sprintf("address: `%s`", s.server.Addr)
+}
+
+func (s *HTTP) Start(ctx context.Context) error {
 	var fields []zap.Field
 	if value := strings.Split(s.server.Addr, ":"); len(value) == 2 {
 		ip, port := value[0], value[1]
@@ -60,20 +68,24 @@ func (s *ServiceHTTP) Start(ctx context.Context) error {
 		}
 		fields = append(fields, log.FNetHostIP(ip), log.FNetHostPort(port))
 	}
-	s.l.Info("starting http service", fields...)
+	s.l.Info("starting keel service", fields...)
 	s.server.BaseContext = func(_ net.Listener) context.Context { return ctx }
 	s.server.RegisterOnShutdown(func() {
 		s.running.Store(false)
 	})
 	s.running.Store(true)
-	if err := s.server.ListenAndServe(); !errors.Is(err, http.ErrServerClosed) {
-		log.WithError(s.l, err).Error("service error")
-		return err
+	if err := s.server.ListenAndServe(); errors.Is(err, http.ErrServerClosed) {
+		return nil
+	} else if err != nil {
+		return errors.Wrap(err, "failed to start service")
 	}
 	return nil
 }
 
-func (s *ServiceHTTP) Close(ctx context.Context) error {
-	s.l.Info("stopping http service")
-	return s.server.Shutdown(ctx)
+func (s *HTTP) Close(ctx context.Context) error {
+	s.l.Info("stopping keel service")
+	if err := s.server.Shutdown(ctx); err != nil {
+		return errors.Wrap(err, "failed to stop service")
+	}
+	return nil
 }

service/http_test.go

@@ -0,0 +1,39 @@
+package service_test
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/foomo/keel"
+	"github.com/foomo/keel/service"
+	"go.uber.org/zap"
+)
+
+func ExampleNewHTTP() {
+	shutdown(3 * time.Second)
+
+	svr := keel.NewServer(
+		keel.WithLogger(zap.NewExample()),
+	)
+
+	l := svr.Logger()
+	// create demo service
+	svs := http.NewServeMux()
+	svs.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write([]byte("OK"))
+	})
+
+	svr.AddService(
+		service.NewHTTP(l, "demo", "localhost:8080", svs),
+	)
+
+	svr.Run()
+
+	// Output:
+	// {"level":"info","msg":"starting keel server"}
+	// {"level":"info","msg":"starting keel service","keel_service_type":"http","keel_service_name":"demo","net_host_ip":"localhost","net_host_port":"8080"}
+	// {"level":"debug","msg":"keel graceful shutdown"}
+	// {"level":"info","msg":"stopping keel service","keel_service_type":"http","keel_service_name":"demo"}
+	// {"level":"info","msg":"keel server stopped"}
+}

service/httphealthz.go

@@ -1,19 +1,21 @@
-package keel
+package service
 
 import (
 	"context"
 	"errors"
 	"net/http"
 
+	"github.com/foomo/keel/healthz"
+	"github.com/foomo/keel/interfaces"
 	"go.uber.org/zap"
 
 	"github.com/foomo/keel/log"
 )
 
 const (
-	DefaultServiceHTTPHealthzName = "healthz"
-	DefaultServiceHTTPHealthzAddr = ":9400"
-	DefaultServiceHTTPHealthzPath = "/healthz"
+	DefaultHTTPHealthzName = "healthz"
+	DefaultHTTPHealthzAddr = ":9400"
+	DefaultHTTPHealthzPath = "/healthz"
 )
 
 var (
@@ -24,7 +26,7 @@ var (
 	ErrStartupProbeFailed    = errors.New("startup probe failed")
 )
 
-func NewServiceHTTPHealthz(l *zap.Logger, name, addr, path string, probes map[HealthzType][]interface{}) *ServiceHTTP {
+func NewHealthz(l *zap.Logger, name, addr, path string, probes map[healthz.Type][]interface{}) *HTTP {
 	handler := http.NewServeMux()
 
 	unavailable := func(l *zap.Logger, w http.ResponseWriter, r *http.Request, err error) {
@@ -36,17 +38,17 @@ func NewServiceHTTPHealthz(l *zap.Logger, name, addr, path string, probes map[He
 
 	call := func(ctx context.Context, probe interface{}) (bool, error) {
 		switch h := probe.(type) {
-		case BoolHealthzer:
+		case healthz.BoolHealthzer:
 			return h.Healthz(), nil
-		case BoolHealthzerWithContext:
+		case healthz.BoolHealthzerWithContext:
 			return h.Healthz(ctx), nil
-		case ErrorHealthzer:
+		case healthz.ErrorHealthzer:
 			return true, h.Healthz()
-		case ErrorHealthzWithContext:
+		case healthz.ErrorHealthzWithContext:
 			return true, h.Healthz(ctx)
-		case ErrorPinger:
+		case interfaces.ErrorPinger:
 			return true, h.Ping()
-		case ErrorPingerWithContext:
+		case interfaces.ErrorPingerWithContext:
 			return true, h.Ping(ctx)
 		default:
 			return false, ErrUnhandledHealthzProbe
@@ -55,7 +57,7 @@ func NewServiceHTTPHealthz(l *zap.Logger, name, addr, path string, probes map[He
 
 	handler.HandleFunc(path, func(w http.ResponseWriter, r *http.Request) {
 		for typ, values := range probes {
-			if typ == HealthzTypeStartup {
+			if typ == healthz.TypeStartup {
 				continue
 			}
 			for _, p := range values {
@@ -72,12 +74,12 @@ func NewServiceHTTPHealthz(l *zap.Logger, name, addr, path string, probes map[He
 		_, _ = w.Write([]byte("OK"))
 	})
 
-	handler.HandleFunc(path+"/"+HealthzTypeLiveness.String(), func(w http.ResponseWriter, r *http.Request) {
+	handler.HandleFunc(path+"/"+healthz.TypeLiveness.String(), func(w http.ResponseWriter, r *http.Request) {
 		var ps []interface{}
-		if p, ok := probes[HealthzTypeAlways]; ok {
+		if p, ok := probes[healthz.TypeAlways]; ok {
 			ps = append(ps, p...)
 		}
-		if p, ok := probes[HealthzTypeLiveness]; ok {
+		if p, ok := probes[healthz.TypeLiveness]; ok {
 			ps = append(ps, p...)
 		}
 		for _, p := range ps {
@@ -93,12 +95,12 @@ func NewServiceHTTPHealthz(l *zap.Logger, name, addr, path string, probes map[He
 		_, _ = w.Write([]byte("OK"))
 	})
 
-	handler.HandleFunc(path+"/"+HealthzTypeReadiness.String(), func(w http.ResponseWriter, r *http.Request) {
+	handler.HandleFunc(path+"/"+healthz.TypeReadiness.String(), func(w http.ResponseWriter, r *http.Request) {
 		var ps []interface{}
-		if p, ok := probes[HealthzTypeAlways]; ok {
+		if p, ok := probes[healthz.TypeAlways]; ok {
 			ps = append(ps, p...)
 		}
-		if p, ok := probes[HealthzTypeReadiness]; ok {
+		if p, ok := probes[healthz.TypeReadiness]; ok {
 			ps = append(ps, p...)
 		}
 		for _, p := range ps {
@@ -114,12 +116,12 @@ func NewServiceHTTPHealthz(l *zap.Logger, name, addr, path string, probes map[He
 		_, _ = w.Write([]byte("OK"))
 	})
 
-	handler.HandleFunc(path+"/"+HealthzTypeStartup.String(), func(w http.ResponseWriter, r *http.Request) {
+	handler.HandleFunc(path+"/"+healthz.TypeStartup.String(), func(w http.ResponseWriter, r *http.Request) {
 		var ps []interface{}
-		if p, ok := probes[HealthzTypeAlways]; ok {
+		if p, ok := probes[healthz.TypeAlways]; ok {
 			ps = append(ps, p...)
 		}
-		if p, ok := probes[HealthzTypeStartup]; ok {
+		if p, ok := probes[healthz.TypeStartup]; ok {
 			ps = append(ps, p...)
 		}
 		for _, p := range ps {
@@ -134,15 +136,15 @@ func NewServiceHTTPHealthz(l *zap.Logger, name, addr, path string, probes map[He
 		w.WriteHeader(http.StatusOK)
 		_, _ = w.Write([]byte("OK"))
 	})
-	return NewServiceHTTP(l, name, addr, handler)
+	return NewHTTP(l, name, addr, handler)
 }
 
-func NewDefaultServiceHTTPProbes(probes map[HealthzType][]interface{}) *ServiceHTTP {
-	return NewServiceHTTPHealthz(
+func NewDefaultHTTPProbes(probes map[healthz.Type][]interface{}) *HTTP {
+	return NewHealthz(
 		log.Logger(),
-		DefaultServiceHTTPHealthzName,
-		DefaultServiceHTTPHealthzAddr,
-		DefaultServiceHTTPHealthzPath,
+		DefaultHTTPHealthzName,
+		DefaultHTTPHealthzAddr,
+		DefaultHTTPHealthzPath,
 		probes,
 	)
 }

service/httppprof.go

@@ -1,6 +1,6 @@
 //go:build !pprof
 
-package keel
+package service
 
 import (
 	"net/http"
@@ -10,12 +10,12 @@ import (
 )
 
 const (
-	DefaultServiceHTTPPProfName = "pprof"
-	DefaultServiceHTTPPProfAddr = "localhost:6060"
-	DefaultServiceHTTPPProfPath = "/debug/pprof"
+	DefaultHTTPPProfName = "pprof"
+	DefaultHTTPPProfAddr = "localhost:6060"
+	DefaultHTTPPProfPath = "/debug/pprof"
 )
 
-func NewServiceHTTPPProf(l *zap.Logger, name, addr, path string) *ServiceHTTP {
+func NewHTTPPProf(l *zap.Logger, name, addr, path string) *HTTP {
 	route := func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusNotImplemented)
 		_, _ = w.Write([]byte("To enable pprof, you need to build your binary with the `-tags=pprof` flag"))
@@ -26,14 +26,14 @@ func NewServiceHTTPPProf(l *zap.Logger, name, addr, path string) *ServiceHTTP {
 	handler.HandleFunc(path+"/profile", route)
 	handler.HandleFunc(path+"/symbol", route)
 	handler.HandleFunc(path+"/trace", route)
-	return NewServiceHTTP(l, name, addr, handler)
+	return NewHTTP(l, name, addr, handler)
 }
 
-func NewDefaultServiceHTTPPProf() *ServiceHTTP {
-	return NewServiceHTTPPProf(
+func NewDefaultHTTPPProf() *HTTP {
+	return NewHTTPPProf(
 		log.Logger(),
-		DefaultServiceHTTPPProfName,
-		DefaultServiceHTTPPProfAddr,
-		DefaultServiceHTTPPProfPath,
+		DefaultHTTPPProfName,
+		DefaultHTTPPProfAddr,
+		DefaultHTTPPProfPath,
 	)
 }

service/httppprof_pprof.go

@@ -1,7 +1,7 @@
 //go:build pprof
 // +build pprof
 
-package keel
+package service
 
 import (
 	"net/http"
@@ -12,12 +12,12 @@ import (
 )
 
 const (
-	DefaultServiceHTTPPProfName = "pprof"
-	DefaultServiceHTTPPProfAddr = "localhost:6060"
-	DefaultServiceHTTPPProfPath = "/debug/pprof"
+	DefaultHTTPPProfName = "pprof"
+	DefaultHTTPPProfAddr = "localhost:6060"
+	DefaultHTTPPProfPath = "/debug/pprof"
 )
 
-func NewServiceHTTPPProf(l *zap.Logger, name, addr, path string) *ServiceHTTP {
+func NewHTTPPProf(l *zap.Logger, name, addr, path string) *ServiceHTTP {
 	handler := http.NewServeMux()
 	handler.HandleFunc(path+"/", pprof.Index)
 	handler.HandleFunc(path+"/cmdline", pprof.Cmdline)
@@ -27,11 +27,11 @@ func NewServiceHTTPPProf(l *zap.Logger, name, addr, path string) *ServiceHTTP {
 	return NewServiceHTTP(l, name, addr, handler)
 }
 
-func NewDefaultServiceHTTPPProf() *ServiceHTTP {
-	return NewServiceHTTPPProf(
+func NewDefaultHTTPPProf() *ServiceHTTP {
+	return NewHTTPPProf(
 		log.Logger(),
-		DefaultServiceHTTPPProfName,
-		DefaultServiceHTTPPProfAddr,
-		DefaultServiceHTTPPProfPath,
+		DefaultHTTPPProfName,
+		DefaultHTTPPProfAddr,
+		DefaultHTTPPProfPath,
 	)
 }

service/httpprometheus.go

@@ -0,0 +1,37 @@
+package service
+
+import (
+	"net/http"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"go.uber.org/zap"
+
+	"github.com/foomo/keel/log"
+)
+
+const (
+	DefaultHTTPPrometheusName = "prometheus"
+	DefaultHTTPPrometheusAddr = ":9200"
+	DefaultHTTPPrometheusPath = "/metrics"
+)
+
+func NewHTTPPrometheus(l *zap.Logger, name, addr, path string) *HTTP {
+	handler := http.NewServeMux()
+	handler.Handle(path, promhttp.HandlerFor(
+		prometheus.DefaultGatherer,
+		promhttp.HandlerOpts{
+			EnableOpenMetrics: true,
+		},
+	))
+	return NewHTTP(l, name, addr, handler)
+}
+
+func NewDefaultHTTPPrometheus() *HTTP {
+	return NewHTTPPrometheus(
+		log.Logger(),
+		DefaultHTTPPrometheusName,
+		DefaultHTTPPrometheusAddr,
+		DefaultHTTPPrometheusPath,
+	)
+}

service/httpviper.go

@@ -1,4 +1,4 @@
-package keel
+package service
 
 import (
 	"encoding/json"
@@ -12,12 +12,12 @@ import (
 )
 
 const (
-	DefaultServiceHTTPViperName = "viper"
-	DefaultServiceHTTPViperAddr = "localhost:9300"
-	DefaultServiceHTTPViperPath = "/config"
+	DefaultHTTPViperName = "viper"
+	DefaultHTTPViperAddr = "localhost:9300"
+	DefaultHTTPViperPath = "/config"
 )
 
-func NewServiceHTTPViper(l *zap.Logger, c *viper.Viper, name, addr, path string) *ServiceHTTP {
+func NewHTTPViper(l *zap.Logger, c *viper.Viper, name, addr, path string) *HTTP {
 	handler := http.NewServeMux()
 	handler.HandleFunc(path, func(w http.ResponseWriter, r *http.Request) {
 		type payload struct {
@@ -44,15 +44,15 @@ func NewServiceHTTPViper(l *zap.Logger, c *viper.Viper, name, addr, path string)
 			http.Error(w, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
 		}
 	})
-	return NewServiceHTTP(l, name, addr, handler)
+	return NewHTTP(l, name, addr, handler)
 }
 
-func NewDefaultServiceHTTPViper() *ServiceHTTP {
-	return NewServiceHTTPViper(
+func NewDefaultHTTPViper() *HTTP {
+	return NewHTTPViper(
 		log.Logger(),
 		config.Config(),
-		DefaultServiceHTTPViperName,
-		DefaultServiceHTTPViperAddr,
-		DefaultServiceHTTPViperPath,
+		DefaultHTTPViperName,
+		DefaultHTTPViperAddr,
+		DefaultHTTPViperPath,
 	)
 }

service/httpzap.go

@@ -1,4 +1,4 @@
-package keel
+package service
 
 import (
 	"encoding/json"
@@ -12,12 +12,12 @@ import (
 )
 
 const (
-	DefaultServiceHTTPZapName = "zap"
-	DefaultServiceHTTPZapAddr = "localhost:9100"
-	DefaultServiceHTTPZapPath = "/log"
+	DefaultHTTPZapName = "zap"
+	DefaultHTTPZapAddr = "localhost:9100"
+	DefaultHTTPZapPath = "/log"
 )
 
-func NewServiceHTTPZap(l *zap.Logger, name, addr, path string) *ServiceHTTP {
+func NewHTTPZap(l *zap.Logger, name, addr, path string) *HTTP {
 	handler := http.NewServeMux()
 	handler.HandleFunc(path, func(w http.ResponseWriter, r *http.Request) {
 		type errorResponse struct {
@@ -91,14 +91,14 @@ func NewServiceHTTPZap(l *zap.Logger, name, addr, path string) *ServiceHTTP {
 			})
 		}
 	})
-	return NewServiceHTTP(l, name, addr, handler)
+	return NewHTTP(l, name, addr, handler)
 }
 
-func NewDefaultServiceHTTPZap() *ServiceHTTP {
-	return NewServiceHTTPZap(
+func NewDefaultHTTPZap() *HTTP {
+	return NewHTTPZap(
 		log.Logger(),
-		DefaultServiceHTTPZapName,
-		DefaultServiceHTTPZapAddr,
-		DefaultServiceHTTPZapPath,
+		DefaultHTTPZapName,
+		DefaultHTTPZapAddr,
+		DefaultHTTPZapPath,
 	)
 }

servicehttpprometheus.go

@@ -1,37 +0,0 @@
-package keel
-
-import (
-	"net/http"
-
-	"github.com/prometheus/client_golang/prometheus"
-	"github.com/prometheus/client_golang/prometheus/promhttp"
-	"go.uber.org/zap"
-
-	"github.com/foomo/keel/log"
-)
-
-const (
-	DefaultServiceHTTPPrometheusName = "prometheus"
-	DefaultServiceHTTPPrometheusAddr = ":9200"
-	DefaultServiceHTTPPrometheusPath = "/metrics"
-)
-
-func NewServiceHTTPPrometheus(l *zap.Logger, name, addr, path string) *ServiceHTTP {
-	handler := http.NewServeMux()
-	handler.Handle(path, promhttp.HandlerFor(
-		prometheus.DefaultGatherer,
-		promhttp.HandlerOpts{
-			EnableOpenMetrics: true,
-		},
-	))
-	return NewServiceHTTP(l, name, addr, handler)
-}
-
-func NewDefaultServiceHTTPPrometheus() *ServiceHTTP {
-	return NewServiceHTTPPrometheus(
-		log.Logger(),
-		DefaultServiceHTTPPrometheusName,
-		DefaultServiceHTTPPrometheusAddr,
-		DefaultServiceHTTPPrometheusPath,
-	)
-}

telemetry/nonrecording/instruments.go

@@ -0,0 +1,162 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package nonrecording
+
+import (
+	"context"
+	"strings"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/metric/instrument"
+	"go.opentelemetry.io/otel/metric/instrument/asyncfloat64"
+	"go.opentelemetry.io/otel/metric/instrument/asyncint64"
+	"go.opentelemetry.io/otel/metric/instrument/syncfloat64"
+	"go.opentelemetry.io/otel/metric/instrument/syncint64"
+)
+
+type Metric struct {
+	Name string
+	Type string
+	Help string
+}
+
+var metrics []Metric
+
+func Metrics() []Metric {
+	return metrics
+}
+
+type nonrecordingAsyncFloat64Instrument struct {
+	instrument.Asynchronous
+}
+
+var (
+	_ asyncfloat64.InstrumentProvider = nonrecordingAsyncFloat64Instrument{}
+	_ asyncfloat64.Counter            = nonrecordingAsyncFloat64Instrument{}
+	_ asyncfloat64.UpDownCounter      = nonrecordingAsyncFloat64Instrument{}
+	_ asyncfloat64.Gauge              = nonrecordingAsyncFloat64Instrument{}
+)
+
+func (n nonrecordingAsyncFloat64Instrument) Counter(name string, opts ...instrument.Option) (asyncfloat64.Counter, error) {
+	metrics = append(metrics, Metric{Name: strings.ReplaceAll(name, ".", "_"), Type: "COUNTER", Help: instrument.NewConfig(opts...).Description()})
+	return n, nil
+}
+
+func (n nonrecordingAsyncFloat64Instrument) UpDownCounter(name string, opts ...instrument.Option) (asyncfloat64.UpDownCounter, error) {
+	metrics = append(metrics, Metric{Name: strings.ReplaceAll(name, ".", "_"), Type: "UPDOWNCOUNTER", Help: instrument.NewConfig(opts...).Description()})
+	return n, nil
+}
+
+func (n nonrecordingAsyncFloat64Instrument) Gauge(name string, opts ...instrument.Option) (asyncfloat64.Gauge, error) {
+	metrics = append(metrics, Metric{Name: strings.ReplaceAll(name, ".", "_"), Type: "GAUGE", Help: instrument.NewConfig(opts...).Description()})
+	return n, nil
+}
+
+func (nonrecordingAsyncFloat64Instrument) Observe(context.Context, float64, ...attribute.KeyValue) {
+}
+
+type nonrecordingAsyncInt64Instrument struct {
+	instrument.Asynchronous
+}
+
+var (
+	_ asyncint64.InstrumentProvider = nonrecordingAsyncInt64Instrument{}
+	_ asyncint64.Counter            = nonrecordingAsyncInt64Instrument{}
+	_ asyncint64.UpDownCounter      = nonrecordingAsyncInt64Instrument{}
+	_ asyncint64.Gauge              = nonrecordingAsyncInt64Instrument{}
+)
+
+func (n nonrecordingAsyncInt64Instrument) Counter(name string, opts ...instrument.Option) (asyncint64.Counter, error) {
+	metrics = append(metrics, Metric{Name: strings.ReplaceAll(name, ".", "_"), Type: "COUNTER", Help: instrument.NewConfig(opts...).Description()})
+	return n, nil
+}
+
+func (n nonrecordingAsyncInt64Instrument) UpDownCounter(name string, opts ...instrument.Option) (asyncint64.UpDownCounter, error) {
+	metrics = append(metrics, Metric{Name: strings.ReplaceAll(name, ".", "_"), Type: "UPDOWNCOUNTER", Help: instrument.NewConfig(opts...).Description()})
+	return n, nil
+}
+
+func (n nonrecordingAsyncInt64Instrument) Gauge(name string, opts ...instrument.Option) (asyncint64.Gauge, error) {
+	metrics = append(metrics, Metric{Name: strings.ReplaceAll(name, ".", "_"), Type: "GAUGE", Help: instrument.NewConfig(opts...).Description()})
+	return n, nil
+}
+
+func (nonrecordingAsyncInt64Instrument) Observe(context.Context, int64, ...attribute.KeyValue) {
+}
+
+type nonrecordingSyncFloat64Instrument struct {
+	instrument.Synchronous
+}
+
+var (
+	_ syncfloat64.InstrumentProvider = nonrecordingSyncFloat64Instrument{}
+	_ syncfloat64.Counter            = nonrecordingSyncFloat64Instrument{}
+	_ syncfloat64.UpDownCounter      = nonrecordingSyncFloat64Instrument{}
+	_ syncfloat64.Histogram          = nonrecordingSyncFloat64Instrument{}
+)
+
+func (n nonrecordingSyncFloat64Instrument) Counter(name string, opts ...instrument.Option) (syncfloat64.Counter, error) {
+	metrics = append(metrics, Metric{Name: strings.ReplaceAll(name, ".", "_"), Type: "COUNTER", Help: instrument.NewConfig(opts...).Description()})
+	return n, nil
+}
+
+func (n nonrecordingSyncFloat64Instrument) UpDownCounter(name string, opts ...instrument.Option) (syncfloat64.UpDownCounter, error) {
+	metrics = append(metrics, Metric{Name: strings.ReplaceAll(name, ".", "_"), Type: "UPDOWNCOUNTER", Help: instrument.NewConfig(opts...).Description()})
+	return n, nil
+}
+
+func (n nonrecordingSyncFloat64Instrument) Histogram(name string, opts ...instrument.Option) (syncfloat64.Histogram, error) {
+	metrics = append(metrics, Metric{Name: strings.ReplaceAll(name, ".", "_"), Type: "HISTOGRAM", Help: instrument.NewConfig(opts...).Description()})
+	return n, nil
+}
+
+func (nonrecordingSyncFloat64Instrument) Add(context.Context, float64, ...attribute.KeyValue) {
+
+}
+
+func (nonrecordingSyncFloat64Instrument) Record(context.Context, float64, ...attribute.KeyValue) {
+
+}
+
+type nonrecordingSyncInt64Instrument struct {
+	instrument.Synchronous
+}
+
+var (
+	_ syncint64.InstrumentProvider = nonrecordingSyncInt64Instrument{}
+	_ syncint64.Counter            = nonrecordingSyncInt64Instrument{}
+	_ syncint64.UpDownCounter      = nonrecordingSyncInt64Instrument{}
+	_ syncint64.Histogram          = nonrecordingSyncInt64Instrument{}
+)
+
+func (n nonrecordingSyncInt64Instrument) Counter(name string, opts ...instrument.Option) (syncint64.Counter, error) {
+	metrics = append(metrics, Metric{Name: strings.ReplaceAll(name, ".", "_"), Type: "COUNTER", Help: instrument.NewConfig(opts...).Description()})
+	return n, nil
+}
+
+func (n nonrecordingSyncInt64Instrument) UpDownCounter(name string, opts ...instrument.Option) (syncint64.UpDownCounter, error) {
+	metrics = append(metrics, Metric{Name: strings.ReplaceAll(name, ".", "_"), Type: "UPDOWNCOUNTER", Help: instrument.NewConfig(opts...).Description()})
+	return n, nil
+}
+
+func (n nonrecordingSyncInt64Instrument) Histogram(name string, opts ...instrument.Option) (syncint64.Histogram, error) {
+	metrics = append(metrics, Metric{Name: strings.ReplaceAll(name, ".", "_"), Type: "HISTOGRAM", Help: instrument.NewConfig(opts...).Description()})
+	return n, nil
+}
+
+func (nonrecordingSyncInt64Instrument) Add(context.Context, int64, ...attribute.KeyValue) {
+}
+func (nonrecordingSyncInt64Instrument) Record(context.Context, int64, ...attribute.KeyValue) {
+}

telemetry/nonrecording/meter.go

@@ -0,0 +1,50 @@
+package nonrecording
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel/metric"
+	"go.opentelemetry.io/otel/metric/instrument"
+	"go.opentelemetry.io/otel/metric/instrument/asyncfloat64"
+	"go.opentelemetry.io/otel/metric/instrument/asyncint64"
+	"go.opentelemetry.io/otel/metric/instrument/syncfloat64"
+	"go.opentelemetry.io/otel/metric/instrument/syncint64"
+)
+
+// NewNoopMeterProvider creates a MeterProvider that does not record any metrics.
+func NewNoopMeterProvider() metric.MeterProvider {
+	return noopMeterProvider{}
+}
+
+type noopMeterProvider struct{}
+
+var _ metric.MeterProvider = noopMeterProvider{}
+
+func (noopMeterProvider) Meter(instrumentationName string, opts ...metric.MeterOption) metric.Meter {
+	return noopMeter{}
+}
+
+// NewNoopMeter creates a Meter that does not record any metrics.
+func NewNoopMeter() metric.Meter {
+	return noopMeter{}
+}
+
+type noopMeter struct{}
+
+var _ metric.Meter = noopMeter{}
+
+func (noopMeter) AsyncInt64() asyncint64.InstrumentProvider {
+	return nonrecordingAsyncInt64Instrument{}
+}
+func (noopMeter) AsyncFloat64() asyncfloat64.InstrumentProvider {
+	return nonrecordingAsyncFloat64Instrument{}
+}
+func (noopMeter) SyncInt64() syncint64.InstrumentProvider {
+	return nonrecordingSyncInt64Instrument{}
+}
+func (noopMeter) SyncFloat64() syncfloat64.InstrumentProvider {
+	return nonrecordingSyncFloat64Instrument{}
+}
+func (noopMeter) RegisterCallback([]instrument.Asynchronous, func(context.Context)) error {
+	return nil
+}