open debug endpoint for nats

Signed-off-by: Christian Richter <crichter@owncloud.com>

services/nats/pkg/command/server.go

@@ -9,6 +9,9 @@ import (
 
 	"github.com/owncloud/ocis/v2/ocis-pkg/config/configlog"
 	pkgcrypto "github.com/owncloud/ocis/v2/ocis-pkg/crypto"
+	"github.com/owncloud/ocis/v2/ocis-pkg/handlers"
+	"github.com/owncloud/ocis/v2/ocis-pkg/service/debug"
+	"github.com/owncloud/ocis/v2/ocis-pkg/version"
 	"github.com/owncloud/ocis/v2/services/nats/pkg/config"
 	"github.com/owncloud/ocis/v2/services/nats/pkg/config/parser"
 	"github.com/owncloud/ocis/v2/services/nats/pkg/logging"
@@ -38,6 +41,25 @@ func Server(cfg *config.Config) *cli.Command {
 
 			defer cancel()
 
+			{
+				server := debug.NewService(
+					debug.Logger(logger),
+					debug.Name(cfg.Service.Name),
+					debug.Version(version.GetString()),
+					debug.Address(cfg.Debug.Addr),
+					debug.Token(cfg.Debug.Token),
+					debug.Pprof(cfg.Debug.Pprof),
+					debug.Zpages(cfg.Debug.Zpages),
+					debug.Health(handlers.Health),
+					debug.Ready(handlers.Ready),
+				)
+
+				gr.Add(server.ListenAndServe, func(_ error) {
+					_ = server.Shutdown(ctx)
+					cancel()
+				})
+			}
+
 			var tlsConf *tls.Config
 			if cfg.Nats.EnableTLS {
 				// Generate a self-signing cert if no certificate is present

services/nats/pkg/config/config.go

@@ -9,11 +9,10 @@ import (
 // Config combines all available configuration parts.
 type Config struct {
 	Commons *shared.Commons `yaml:"-"` // don't use this directly as configuration for a service
-
-	Service Service `yaml:"-"`
-
-	Log   *Log  `yaml:"log"`
-	Debug Debug `yaml:"debug"`
+	Service Service         `yaml:"-"`
+	Tracing *Tracing        `yaml:"tracing"`
+	Log     *Log            `yaml:"log"`
+	Debug   Debug           `yaml:"debug"`
 
 	Nats Nats `ociConfig:"nats"`
 
@@ -31,3 +30,10 @@ type Nats struct {
 	TLSSkipVerifyClientCert bool   `yaml:"tls_skip_verify_client_cert" env:"OCIS_INSECURE;NATS_TLS_SKIP_VERIFY_CLIENT_CERT" desc:"Whether the NATS server should skip the client certificate verification during the TLS handshake."`
 	EnableTLS               bool   `yaml:"enable_tls" env:"OCIS_EVENTS_ENABLE_TLS;NATS_EVENTS_ENABLE_TLS" desc:"Enable TLS for the connection to the events broker. The events broker is the ocis service which receives and delivers events between the services.."`
 }
+
+type Tracing struct {
+	Enabled   bool   `yaml:"enabled" env:"OCIS_TRACING_ENABLED;NATS_TRACING_ENABLED" desc:"Activates tracing."`
+	Type      string `yaml:"type" env:"OCIS_TRACING_TYPE;NATS_TRACING_TYPE" desc:"The type of tracing. Defaults to \"\", which is the same as \"jaeger\". Allowed tracing types are \"jaeger\" and \"\" as of now."`
+	Endpoint  string `yaml:"endpoint" env:"OCIS_TRACING_ENDPOINT;NATS_TRACING_ENDPOINT" desc:"The endpoint of the tracing agent."`
+	Collector string `yaml:"collector" env:"OCIS_TRACING_COLLECTOR;NATS_TRACING_COLLECTOR" desc:"The HTTP endpoint for sending spans directly to a collector, i.e. http://jaeger-collector:14268/api/traces. Only used if the tracing endpoint is unset."`
+}

services/nats/pkg/config/defaults/defaultconfig.go

@@ -22,7 +22,10 @@ func FullDefaultConfig() *config.Config {
 func DefaultConfig() *config.Config {
 	return &config.Config{
 		Debug: config.Debug{
-			Addr: "127.0.0.1:9234",
+			Addr:   "127.0.0.1:9234",
+			Token:  "",
+			Pprof:  false,
+			Zpages: false,
 		},
 		Service: config.Service{
 			Name: "nats",
@@ -52,6 +55,18 @@ func EnsureDefaults(cfg *config.Config) {
 	} else if cfg.Log == nil {
 		cfg.Log = &config.Log{}
 	}
+
+	// provide with defaults for shared tracing, since we need a valid destination address for "envdecode".
+	if cfg.Tracing == nil && cfg.Commons != nil && cfg.Commons.Tracing != nil {
+		cfg.Tracing = &config.Tracing{
+			Enabled:   cfg.Commons.Tracing.Enabled,
+			Type:      cfg.Commons.Tracing.Type,
+			Endpoint:  cfg.Commons.Tracing.Endpoint,
+			Collector: cfg.Commons.Tracing.Collector,
+		}
+	} else if cfg.Tracing == nil {
+		cfg.Tracing = &config.Tracing{}
+	}
 }
 
 // Sanitize sanitizes the configuration