diff --git a/mysqlchk.go b/mysqlchk.go
index 0f1a4f9..a5fbb0b 100644
--- a/mysqlchk.go
+++ b/mysqlchk.go
@@ -11,6 +11,8 @@ import "net/http"
 var db *sql.DB
 var wsrepStmt *sql.Stmt
 var readOnlyStmt *sql.Stmt
+var maxConnStmt *sql.Stmt
+var connUsedStmt *sql.Stmt
 
 var username = flag.String("username", "clustercheckuser", "MySQL Username")
 var password = flag.String("password", "clustercheckpassword!", "MySQL Password")
@@ -32,6 +34,8 @@ func init() {
 func checkHandler(w http.ResponseWriter, r *http.Request) {
 	var fieldName, readOnly string
 	var wsrepState int
+	var maxConn int
+	var connUsed int
 
 	if _, err := os.Stat(*forceUpFile); err == nil {
 		fmt.Fprint(w, "Cluster node OK by manual override\n")
@@ -43,7 +47,25 @@ func checkHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	err := wsrepStmt.QueryRow().Scan(&fieldName, &wsrepState)
+	err := maxConnStmt.QueryRow().Scan(&fieldName, &maxConn)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	err = connUsedStmt.QueryRow().Scan(&fieldName, &connUsed)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	if maxConn <= (connUsed + 10) {
+		http.Error(w, "Cluster node is unavailable Max connections", http.StatusServiceUnavailable)
+	} else {
+		log.Println("Number of free connections", maxConn-connUsed)
+	}
+
+	err = wsrepStmt.QueryRow().Scan(&fieldName, &wsrepState)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
@@ -96,6 +118,16 @@ func main() {
 		log.Fatal(err)
 	}
 
+	maxConnStmt, err = db.Prepare("show variables like 'max_connections'")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	connUsedStmt, err = db.Prepare("show status where variable_name = 'Threads_connected'")
+	if err != nil {
+		log.Fatal(err)
+	}
+
 	log.Println("Listening...")
 	http.HandleFunc("/", checkHandler)
 	log.Fatal(http.ListenAndServe(fmt.Sprintf("%s:%d", *bindAddr, *bindPort), nil))
diff --git a/mysqlchk.service b/mysqlchk.service
new file mode 100644
index 0000000..5fff781
--- /dev/null
+++ b/mysqlchk.service
@@ -0,0 +1,10 @@
+[Unit]
+Description=Mysqlchk check
+After=mariadb.service
+
+[Service]
+ExecStart=/usr/bin/mysqlchk
+Restart=always
+
+[Install]
+WantedBy=multi-user.target