chore: do not block startup

client/couchbase.go

@@ -18,7 +18,7 @@ type Client struct {
 }
 
 // New creates a new couchbase client
-func New(url, user, password string) (Client, error) {
+func New(url, user, password string) Client {
 	var client = Client{
 		baseURL: url,
 		client: http.Client{
@@ -28,14 +28,17 @@ func New(url, user, password string) (Client, error) {
 			},
 		},
 	}
-	nodes, err := client.Nodes()
-	if err != nil {
-		return client, errors.Wrap(err, "failed to get node details")
-	}
-	if !strings.HasPrefix(nodes.Nodes[0].Version, "5.") {
-		log.Warnf("couchbase %s is not fully supported", nodes.Nodes[0].Version)
-	}
-	return client, nil
+	go func() {
+		nodes, err := client.Nodes()
+		if err != nil {
+			log.Warnf("couldn't verify server version compatibility: %s", err.Error())
+			return
+		}
+		if !strings.HasPrefix(nodes.Nodes[0].Version, "5.") {
+			log.Warnf("couchbase %s is not fully supported", nodes.Nodes[0].Version)
+		}
+	}()
+	return client
 }
 
 func (c Client) url(path string) string {

main.go

@@ -37,10 +37,7 @@ func main() {
 
 	log.Infof("starting couchbase-exporter %s...", version)
 
-	client, err := client.New(*couchbaseURL, *couchbaseUsername, *couchbasePassword)
-	if err != nil {
-		log.Fatalf("failed to create couchbase client: %v", err)
-	}
+	var client = client.New(*couchbaseURL, *couchbaseUsername, *couchbasePassword)
 
 	if *tasks {
 		prometheus.MustRegister(collector.NewTasksCollector(client))