add option "fqdn" to configure local FQDN

src/common/inc/tglobal.h

@@ -53,6 +53,7 @@ extern int64_t tsMsPerDay[3];
 
 extern char  tsFirst[];
 extern char  tsSecond[];
+extern char  tsLocalFqdn[];
 extern char  tsLocalEp[];
 extern uint16_t tsServerPort;
 extern uint16_t tsDnodeShellPort;

src/common/src/tglobal.c

@@ -65,6 +65,7 @@ int64_t tsMsPerDay[] = {86400000L, 86400000000L, 86400000000000L};
 char  tsFirst[TSDB_EP_LEN] = {0};  
 char  tsSecond[TSDB_EP_LEN] = {0};
 char  tsArbitrator[TSDB_EP_LEN] = {0};
+char  tsLocalFqdn[TSDB_FQDN_LEN] = {0};
 char  tsLocalEp[TSDB_EP_LEN] = {0};  // Local End Point, hostname:port
 uint16_t tsServerPort = 6030;
 uint16_t tsDnodeShellPort = 6030;  // udp[6035-6039] tcp[6035]
@@ -305,6 +306,16 @@ static void doInitGlobalConfig() {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
+  cfg.option = "fqdn";
+  cfg.ptr = tsLocalFqdn;
+  cfg.valType = TAOS_CFG_VTYPE_STRING;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_CLIENT;
+  cfg.minValue = 0;
+  cfg.maxValue = 0;
+  cfg.ptrLength = TSDB_FQDN_LEN;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
   // port
   cfg.option = "serverPort";
   cfg.ptr = &tsServerPort;
@@ -1251,9 +1262,13 @@ bool taosCheckGlobalCfg() {
     taosSetAllDebugFlag();
   }
   
+  if (tsLocalFqdn[0] == 0) 
     taosGetFqdn(tsLocalEp);
-  sprintf(tsLocalEp + strlen(tsLocalEp), ":%d", tsServerPort);
-  uPrint("localEp is %s", tsLocalEp);
+  else 
+    strcpy(tsLocalEp, tsLocalFqdn);
+
+  snprintf(tsLocalEp + strlen(tsLocalEp), sizeof(tsLocalEp), ":%d", tsServerPort);
+  uPrint("localEp is: %s", tsLocalEp);
 
   if (tsFirst[0] == 0) {
     strcpy(tsFirst, tsLocalEp);