PRint config on start-up

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

config/config.go

@@ -10,6 +10,9 @@ import (
 	"time"
 )
 
+const defaultRebuild = time.Second * 3
+const defaultUpstreamTimeout = time.Second * 60
+
 // Config for the NATS Connector
 type Config struct {
 	Broker string
@@ -49,8 +52,8 @@ func Get() Config {
 		gatewayURL = val
 	}
 
-	upstreamTimeout := time.Second * 30
-	rebuildInterval := time.Second * 3
+	upstreamTimeout := defaultUpstreamTimeout
+	rebuildInterval := defaultRebuild
 
 	if val, exists := os.LookupEnv("upstream_timeout"); exists {
 		parsedVal, err := time.ParseDuration(val)

main.go

@@ -4,7 +4,9 @@
 package main
 
 import (
+	"fmt"
 	"log"
+	"strconv"
 
 	"github.com/openfaas-incubator/connector-sdk/types"
 	"github.com/openfaas-incubator/nats-connector/config"
@@ -34,6 +36,25 @@ func main() {
 		ConnTimeout: config.UpstreamTimeout, // ConnTimeout isn't the same as UpstreamTimeout, it's just the delay to connect to NATS.
 	}
 
+	fmt.Printf(`==============================================================================
+NATS Connector for OpenFaaS
+
+Gateway URL: %s
+NATS URL: nats://%s:4222
+Topics: %s
+Upstream timeout: %s
+Topic-map rebuild interval: %s
+Async invocation: %q
+==============================================================================
+
+`, config.GatewayURL,
+		config.Broker,
+		config.UpstreamTimeout,
+		config.Topics,
+		config.RebuildInterval,
+		strconv.FormatBool(config.AsyncFunctionInvocation),
+	)
+
 	broker, err := nats.NewBroker(brokerConfig)
 
 	if err != nil {