feat[cluster]: send monitor information in multi-process mode

source/dnode/mgmt/bm/bmHandle.c

@@ -23,6 +23,29 @@ void bmGetMonitorInfo(SMgmtWrapper *pWrapper, SMonBmInfo *bmInfo) {
   }
 }
 
+int32_t bmProcessGetMonBmInfoReq(SMgmtWrapper *pWrapper, SNodeMsg *pReq) {
+  SMonBmInfo bmInfo = {0};
+  bmGetMonitorInfo(pWrapper, &bmInfo);
+
+  int32_t rspLen = tSerializeSMonBmInfo(NULL, 0, &bmInfo);
+  if (rspLen < 0) {
+    terrno = TSDB_CODE_INVALID_MSG;
+    return -1;
+  }
+
+  void *pRsp = rpcMallocCont(rspLen);
+  if (pRsp == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  tSerializeSMonBmInfo(pRsp, rspLen, &bmInfo);
+  pReq->pRsp = pRsp;
+  pReq->rspLen = rspLen;
+  tFreeSMonBmInfo(&bmInfo);
+  return 0;
+}
+
 int32_t bmProcessCreateReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
   SDnode  *pDnode = pWrapper->pDnode;
   SRpcMsg *pReq = &pMsg->rpcMsg;
@@ -61,4 +84,6 @@ int32_t bmProcessDropReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
   }
 }
 
-void bmInitMsgHandle(SMgmtWrapper *pWrapper) {}
+void bmInitMsgHandle(SMgmtWrapper *pWrapper) {
+  dndSetMsgHandle(pWrapper, TDMT_MON_BM_INFO, bmProcessMonitorMsg, DEFAULT_HANDLE);
+}

source/dnode/mgmt/bm/bmWorker.c

@@ -33,7 +33,34 @@ static void bmSendErrorRsps(SMgmtWrapper *pWrapper, STaosQall *qall, int32_t num
   }
 }
 
-static void bmProcessQueue(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
+static void bmProcessMonQueue(SQueueInfo *pInfo, SNodeMsg *pMsg) {
+  SBnodeMgmt *pMgmt = pInfo->ahandle;
+
+  dTrace("msg:%p, get from bnode monitor queue", pMsg);
+  SRpcMsg *pRpc = &pMsg->rpcMsg;
+  int32_t  code = -1;
+
+  if (pMsg->rpcMsg.msgType == TDMT_MON_BM_INFO) {
+    code = bmProcessGetMonBmInfoReq(pMgmt->pWrapper, pMsg);
+  }
+
+  if (pRpc->msgType & 1U) {
+    if (pRpc->handle != NULL && code != TSDB_CODE_MND_ACTION_IN_PROGRESS) {
+      if (code != 0) {
+        code = terrno;
+        dError("msg:%p, failed to process since %s", pMsg, terrstr());
+      }
+      SRpcMsg rsp = {.handle = pRpc->handle, .code = code, .contLen = pMsg->rspLen, .pCont = pMsg->pRsp};
+      tmsgSendRsp(&rsp);
+    }
+  }
+
+  dTrace("msg:%p, is freed, result:0x%04x:%s", pMsg, code & 0XFFFF, tstrerror(code));
+  rpcFreeCont(pRpc->pCont);
+  taosFreeQitem(pMsg);
+}
+
+static void bmProcessWriteQueue(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
   SBnodeMgmt   *pMgmt = pInfo->ahandle;
   SMgmtWrapper *pWrapper = pMgmt->pWrapper;
 
@@ -72,18 +99,37 @@ int32_t bmProcessWriteMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
   return 0;
 }
 
+int32_t bmProcessMonitorMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
+  SBnodeMgmt    *pMgmt = pWrapper->pMgmt;
+  SSingleWorker *pWorker = &pMgmt->monitorWorker;
+
+  dTrace("msg:%p, put into worker:%s", pMsg, pWorker->name);
+  taosWriteQitem(pWorker->queue, pMsg);
+  return 0;
+}
+
 int32_t bmStartWorker(SBnodeMgmt *pMgmt) {
-  SMultiWorkerCfg cfg = {.max = 1, .name = "bnode-write", .fp = (FItems)bmProcessQueue, .param = pMgmt};
+  SMultiWorkerCfg cfg = {.max = 1, .name = "bnode-write", .fp = (FItems)bmProcessWriteQueue, .param = pMgmt};
   if (tMultiWorkerInit(&pMgmt->writeWorker, &cfg) != 0) {
-    dError("failed to start bnode write worker since %s", terrstr());
+    dError("failed to start bnode-write worker since %s", terrstr());
     return -1;
   }
 
+  if (tsMultiProcess) {
+    SSingleWorkerCfg sCfg = {
+        .min = 1, .max = 1, .name = "bnode-monitor", .fp = (FItem)bmProcessMonQueue, .param = pMgmt};
+    if (tSingleWorkerInit(&pMgmt->monitorWorker, &sCfg) != 0) {
+      dError("failed to start bnode-monitor worker since %s", terrstr());
+      return -1;
+    }
+  }
+
   dDebug("bnode workers are initialized");
   return 0;
 }
 
 void bmStopWorker(SBnodeMgmt *pMgmt) {
+  tSingleWorkerCleanup(&pMgmt->monitorWorker);
   tMultiWorkerCleanup(&pMgmt->writeWorker);
   dDebug("bnode workers are closed");
 }

source/dnode/mgmt/dm/dmHandle.c

@@ -212,12 +212,4 @@ void dmInitMsgHandle(SMgmtWrapper *pWrapper) {
   dndSetMsgHandle(pWrapper, TDMT_MND_STATUS_RSP, dmProcessMonitorMsg, DEFAULT_HANDLE);
   dndSetMsgHandle(pWrapper, TDMT_MND_GRANT_RSP, dmProcessMgmtMsg, DEFAULT_HANDLE);
   dndSetMsgHandle(pWrapper, TDMT_MND_AUTH_RSP, dmProcessMgmtMsg, DEFAULT_HANDLE);
-
-  // Monitor info exchange between processes
-  dndSetMsgHandle(pWrapper, TDMT_MON_MM_INFO, dmProcessMonitorMsg, DEFAULT_HANDLE);
-  dndSetMsgHandle(pWrapper, TDMT_MON_VM_INFO, dmProcessMonitorMsg, DEFAULT_HANDLE);
-  dndSetMsgHandle(pWrapper, TDMT_MON_QM_INFO, dmProcessMonitorMsg, DEFAULT_HANDLE);
-  dndSetMsgHandle(pWrapper, TDMT_MON_SM_INFO, dmProcessMonitorMsg, DEFAULT_HANDLE);
-  dndSetMsgHandle(pWrapper, TDMT_MON_BM_INFO, dmProcessMonitorMsg, DEFAULT_HANDLE);
-  dndSetMsgHandle(pWrapper, TDMT_MON_VM_LOAD, dmProcessMonitorMsg, DEFAULT_HANDLE);
 }

source/dnode/mgmt/dm/dmMonitor.c

@@ -59,74 +59,92 @@ void dmSendMonitorReport(SDnode *pDnode) {
   tstrncpy(epset.eps[0].fqdn, tsLocalFqdn, TSDB_FQDN_LEN);
   epset.eps[0].port = tsServerPort;
 
+  SMgmtWrapper *pWrapper = NULL;
   dmGetMonitorInfo(pDnode, &dmInfo);
 
-  SMgmtWrapper *pWrapper = dndAcquireWrapper(pDnode, MNODE);
-  if (pWrapper != NULL) {
-    if (!tsMultiProcess) {
+  pWrapper = &pDnode->wrappers[MNODE];
+  if (!tsMultiProcess) {
+    if (dndMarkWrapper(pWrapper) != 0) {
       mmGetMonitorInfo(pWrapper, &mmInfo);
-    } else {
+      dndReleaseWrapper(pWrapper);
+    }
+  } else {
+    if (pWrapper->required) {
       req.msgType = TDMT_MON_MM_INFO;
       dndSendRecv(pDnode, &epset, &req, &rsp);
-      tDeserializeSMonMmInfo(rsp.pCont, rsp.contLen, &mmInfo);
+      if (rsp.code == 0) {
+        tDeserializeSMonMmInfo(rsp.pCont, rsp.contLen, &mmInfo);
+      }
       rpcFreeCont(rsp.pCont);
     }
-    dndReleaseWrapper(pWrapper);
   }
 
-  pWrapper = dndAcquireWrapper(pDnode, VNODES);
-  if (pWrapper != NULL) {
-    if (!tsMultiProcess) {
+  pWrapper = &pDnode->wrappers[VNODES];
+  if (!tsMultiProcess) {
+    if (dndMarkWrapper(pWrapper) != 0) {
       vmGetMonitorInfo(pWrapper, &vmInfo);
-    } else {
+      dndReleaseWrapper(pWrapper);
+    }
+  } else {
+    if (pWrapper->required) {
       req.msgType = TDMT_MON_VM_INFO;
       dndSendRecv(pDnode, &epset, &req, &rsp);
-      dndReleaseWrapper(pWrapper);
-      tDeserializeSMonVmInfo(rsp.pCont, rsp.contLen, &vmInfo);
+      if (rsp.code == 0) {
+        tDeserializeSMonVmInfo(rsp.pCont, rsp.contLen, &vmInfo);
+      }
       rpcFreeCont(rsp.pCont);
     }
   }
 
-  pWrapper = dndAcquireWrapper(pDnode, QNODE);
-  if (pWrapper != NULL) {
-    if (!tsMultiProcess) {
+  pWrapper = &pDnode->wrappers[QNODE];
+  if (!tsMultiProcess) {
+    if (dndMarkWrapper(pWrapper) != 0) {
       qmGetMonitorInfo(pWrapper, &qmInfo);
-    } else {
+      dndReleaseWrapper(pWrapper);
+    }
+  } else {
+    if (pWrapper->required) {
       req.msgType = TDMT_MON_QM_INFO;
       dndSendRecv(pDnode, &epset, &req, &rsp);
-      dndReleaseWrapper(pWrapper);
-      tDeserializeSMonQmInfo(rsp.pCont, rsp.contLen, &qmInfo);
+      if (rsp.code == 0) {
+        tDeserializeSMonQmInfo(rsp.pCont, rsp.contLen, &qmInfo);
+      }
       rpcFreeCont(rsp.pCont);
     }
-    dndReleaseWrapper(pWrapper);
   }
 
-  pWrapper = dndAcquireWrapper(pDnode, SNODE);
-  if (pWrapper != NULL) {
-    if (!tsMultiProcess) {
+  pWrapper = &pDnode->wrappers[SNODE];
+  if (!tsMultiProcess) {
+    if (dndMarkWrapper(pWrapper) != 0) {
       smGetMonitorInfo(pWrapper, &smInfo);
-    } else {
+      dndReleaseWrapper(pWrapper);
+    }
+  } else {
+    if (pWrapper->required) {
       req.msgType = TDMT_MON_SM_INFO;
       dndSendRecv(pDnode, &epset, &req, &rsp);
-      dndReleaseWrapper(pWrapper);
-      tDeserializeSMonSmInfo(rsp.pCont, rsp.contLen, &smInfo);
+      if (rsp.code == 0) {
+        tDeserializeSMonSmInfo(rsp.pCont, rsp.contLen, &smInfo);
+      }
       rpcFreeCont(rsp.pCont);
     }
-    dndReleaseWrapper(pWrapper);
   }
 
-  pWrapper = dndAcquireWrapper(pDnode, BNODE);
-  if (pWrapper != NULL) {
-    if (!tsMultiProcess) {
+  pWrapper = &pDnode->wrappers[BNODE];
+  if (!tsMultiProcess) {
+    if (dndMarkWrapper(pWrapper) != 0) {
       bmGetMonitorInfo(pWrapper, &bmInfo);
-    } else {
+      dndReleaseWrapper(pWrapper);
+    }
+  } else {
+    if (pWrapper->required) {
       req.msgType = TDMT_MON_BM_INFO;
       dndSendRecv(pDnode, &epset, &req, &rsp);
-      dndReleaseWrapper(pWrapper);
-      tDeserializeSMonBmInfo(rsp.pCont, rsp.contLen, &bmInfo);
+      if (rsp.code == 0) {
+        tDeserializeSMonBmInfo(rsp.pCont, rsp.contLen, &bmInfo);
+      }
       rpcFreeCont(rsp.pCont);
     }
-    dndReleaseWrapper(pWrapper);
   }
 
   monSetDmInfo(&dmInfo);
@@ -143,168 +161,6 @@ void dmSendMonitorReport(SDnode *pDnode) {
   monSendReport();
 }
 
-int32_t dmProcessGetMonMmInfoReq(SDnodeMgmt *pMgmt, SNodeMsg *pReq) {
-  SMgmtWrapper *pWrapper = dndAcquireWrapper(pMgmt->pDnode, MNODE);
-  if (pWrapper == NULL) return -1;
-
-  SMonMmInfo mmInfo = {0};
-  mmGetMonitorInfo(pWrapper, &mmInfo);
-  dndReleaseWrapper(pWrapper);
-
-  int32_t rspLen = tSerializeSMonMmInfo(NULL, 0, &mmInfo);
-  if (rspLen < 0) {
-    terrno = TSDB_CODE_INVALID_MSG;
-    return -1;
-  }
-
-  void *pRsp = rpcMallocCont(rspLen);
-  if (pRsp == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
-
-  tSerializeSMonMmInfo(pRsp, rspLen, &mmInfo);
-  pReq->pRsp = pRsp;
-  pReq->rspLen = rspLen;
-  tFreeSMonMmInfo(&mmInfo);
-  return 0;
-}
-
-int32_t dmProcessGetMonVmInfoReq(SDnodeMgmt *pMgmt, SNodeMsg *pReq) {
-  SMgmtWrapper *pWrapper = dndAcquireWrapper(pMgmt->pDnode, VNODES);
-  if (pWrapper == NULL) return -1;
-
-  SMonVmInfo vmInfo = {0};
-  vmGetMonitorInfo(pWrapper, &vmInfo);
-  dndReleaseWrapper(pWrapper);
-
-  int32_t rspLen = tSerializeSMonVmInfo(NULL, 0, &vmInfo);
-  if (rspLen < 0) {
-    terrno = TSDB_CODE_INVALID_MSG;
-    return -1;
-  }
-
-  void *pRsp = rpcMallocCont(rspLen);
-  if (pRsp == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
-
-  tSerializeSMonVmInfo(pRsp, rspLen, &vmInfo);
-  pReq->pRsp = pRsp;
-  pReq->rspLen = rspLen;
-  tFreeSMonVmInfo(&vmInfo);
-  return 0;
-}
-
-int32_t dmProcessGetMonQmInfoReq(SDnodeMgmt *pMgmt, SNodeMsg *pReq) {
-  SMgmtWrapper *pWrapper = dndAcquireWrapper(pMgmt->pDnode, QNODE);
-  if (pWrapper == NULL) return -1;
-
-  SMonQmInfo qmInfo = {0};
-  qmGetMonitorInfo(pWrapper, &qmInfo);
-  dndReleaseWrapper(pWrapper);
-
-  int32_t rspLen = tSerializeSMonQmInfo(NULL, 0, &qmInfo);
-  if (rspLen < 0) {
-    terrno = TSDB_CODE_INVALID_MSG;
-    return -1;
-  }
-
-  void *pRsp = rpcMallocCont(rspLen);
-  if (pRsp == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
-
-  tSerializeSMonQmInfo(pRsp, rspLen, &qmInfo);
-  pReq->pRsp = pRsp;
-  pReq->rspLen = rspLen;
-  tFreeSMonQmInfo(&qmInfo);
-  return 0;
-}
-
-int32_t dmProcessGetMonSmInfoReq(SDnodeMgmt *pMgmt, SNodeMsg *pReq) {
-  SMgmtWrapper *pWrapper = dndAcquireWrapper(pMgmt->pDnode, SNODE);
-  if (pWrapper == NULL) return -1;
-
-  SMonSmInfo smInfo = {0};
-  smGetMonitorInfo(pWrapper, &smInfo);
-  dndReleaseWrapper(pWrapper);
-
-  int32_t rspLen = tSerializeSMonSmInfo(NULL, 0, &smInfo);
-  if (rspLen < 0) {
-    terrno = TSDB_CODE_INVALID_MSG;
-    return -1;
-  }
-
-  void *pRsp = rpcMallocCont(rspLen);
-  if (pRsp == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
-
-  tSerializeSMonSmInfo(pRsp, rspLen, &smInfo);
-  pReq->pRsp = pRsp;
-  pReq->rspLen = rspLen;
-  tFreeSMonSmInfo(&smInfo);
-  return 0;
-}
-
-int32_t dmProcessGetMonBmInfoReq(SDnodeMgmt *pMgmt, SNodeMsg *pReq) {
-  SMgmtWrapper *pWrapper = dndAcquireWrapper(pMgmt->pDnode, BNODE);
-  if (pWrapper == NULL) return -1;
-
-  SMonBmInfo bmInfo = {0};
-  bmGetMonitorInfo(pWrapper, &bmInfo);
-  dndReleaseWrapper(pWrapper);
-
-  int32_t rspLen = tSerializeSMonBmInfo(NULL, 0, &bmInfo);
-  if (rspLen < 0) {
-    terrno = TSDB_CODE_INVALID_MSG;
-    return -1;
-  }
-
-  void *pRsp = rpcMallocCont(rspLen);
-  if (pRsp == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
-
-  tSerializeSMonBmInfo(pRsp, rspLen, &bmInfo);
-  pReq->pRsp = pRsp;
-  pReq->rspLen = rspLen;
-  tFreeSMonBmInfo(&bmInfo);
-  return 0;
-}
-
-int32_t dmProcessGetVnodeLoadsReq(SDnodeMgmt *pMgmt, SNodeMsg *pReq) {
-  SMgmtWrapper *pWrapper = dndAcquireWrapper(pMgmt->pDnode, VNODES);
-  if (pWrapper == NULL) return -1;
-
-  SMonVloadInfo vloads = {0};
-  vmGetVnodeLoads(pWrapper, &vloads);
-  dndReleaseWrapper(pWrapper);
-
-  int32_t rspLen = tSerializeSMonVloadInfo(NULL, 0, &vloads);
-  if (rspLen < 0) {
-    terrno = TSDB_CODE_INVALID_MSG;
-    return -1;
-  }
-
-  void *pRsp = rpcMallocCont(rspLen);
-  if (pRsp == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
-
-  tSerializeSMonVloadInfo(pRsp, rspLen, &vloads);
-  pReq->pRsp = pRsp;
-  pReq->rspLen = rspLen;
-  tFreeSMonVloadInfo(&vloads);
-  return 0;
-}
-
 void dmGetVnodeLoads(SMgmtWrapper *pWrapper, SMonVloadInfo *pInfo) {
   if (!tsMultiProcess) {
     vmGetVnodeLoads(pWrapper, pInfo);

source/dnode/mgmt/dm/dmWorker.c

@@ -78,24 +78,6 @@ static void dmProcessQueue(SQueueInfo *pInfo, SNodeMsg *pMsg) {
     case TDMT_MND_GRANT_RSP:
       code = dmProcessGrantRsp(pMgmt, pMsg);
       break;
-    case TDMT_MON_MM_INFO:
-      code = dmProcessGetMonMmInfoReq(pMgmt, pMsg);
-      break;
-    case TDMT_MON_VM_INFO:
-      code = dmProcessGetMonVmInfoReq(pMgmt, pMsg);
-      break;
-    case TDMT_MON_QM_INFO:
-      code = dmProcessGetMonQmInfoReq(pMgmt, pMsg);
-      break;
-    case TDMT_MON_SM_INFO:
-      code = dmProcessGetMonSmInfoReq(pMgmt, pMsg);
-      break;
-    case TDMT_MON_BM_INFO:
-      code = dmProcessGetMonBmInfoReq(pMgmt, pMsg);
-      break;
-    case TDMT_MON_VM_LOAD:
-      code = dmProcessGetVnodeLoadsReq(pMgmt, pMsg);
-      break;
     default:
       code = dmProcessCDnodeReq(pMgmt->pDnode, pMsg);
       break;

source/dnode/mgmt/inc/bmInt.h

@@ -17,6 +17,7 @@
 #define _TD_DND_BNODE_INT_H_
 
 #include "dndInt.h"
+
 #include "bnode.h"
 
 #ifdef __cplusplus
@@ -29,6 +30,7 @@ typedef struct SBnodeMgmt {
   SMgmtWrapper *pWrapper;
   const char   *path;
   SMultiWorker  writeWorker;
+  SSingleWorker monitorWorker;
 } SBnodeMgmt;
 
 // bmInt.c
@@ -39,11 +41,13 @@ int32_t bmDrop(SMgmtWrapper *pWrapper);
 void    bmInitMsgHandle(SMgmtWrapper *pWrapper);
 int32_t bmProcessCreateReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t bmProcessDropReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
+int32_t bmProcessGetMonBmInfoReq(SMgmtWrapper *pWrapper, SNodeMsg *pReq);
 
 // bmWorker.c
 int32_t bmStartWorker(SBnodeMgmt *pMgmt);
 void    bmStopWorker(SBnodeMgmt *pMgmt);
 int32_t bmProcessWriteMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
+int32_t bmProcessMonitorMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 
 #ifdef __cplusplus
 }

source/dnode/mgmt/inc/dmInt.h

@@ -54,14 +54,8 @@ int32_t dmProcessGrantRsp(SDnodeMgmt *pMgmt, SNodeMsg *pMsg);
 int32_t dmProcessCDnodeReq(SDnode *pDnode, SNodeMsg *pMsg);
 
 // dmMonitor.c
-int32_t dmProcessGetVnodeLoadsReq(SDnodeMgmt *pMgmt, SNodeMsg *pReq);
-int32_t dmProcessGetMonMmInfoReq(SDnodeMgmt *pMgmt, SNodeMsg *pReq);
-int32_t dmProcessGetMonVmInfoReq(SDnodeMgmt *pMgmt, SNodeMsg *pReq);
-int32_t dmProcessGetMonQmInfoReq(SDnodeMgmt *pMgmt, SNodeMsg *pReq);
-int32_t dmProcessGetMonSmInfoReq(SDnodeMgmt *pMgmt, SNodeMsg *pReq);
-int32_t dmProcessGetMonBmInfoReq(SDnodeMgmt *pMgmt, SNodeMsg *pReq);
-void    dmGetVnodeLoads(SMgmtWrapper *pWrapper, SMonVloadInfo *pInfo);
-void    dmSendMonitorReport(SDnode *pDnode);
+void dmGetVnodeLoads(SMgmtWrapper *pWrapper, SMonVloadInfo *pInfo);
+void dmSendMonitorReport(SDnode *pDnode);
 
 // dmWorker.c
 int32_t dmStartThread(SDnodeMgmt *pMgmt);

source/dnode/mgmt/inc/mmInt.h

@@ -32,6 +32,7 @@ typedef struct SMnodeMgmt {
   SSingleWorker readWorker;
   SSingleWorker writeWorker;
   SSingleWorker syncWorker;
+  SSingleWorker monitorWorker;
   SReplica      replicas[TSDB_MAX_REPLICA];
   int8_t        replica;
   int8_t        selfIndex;
@@ -51,6 +52,7 @@ void    mmInitMsgHandle(SMgmtWrapper *pWrapper);
 int32_t mmProcessCreateReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t mmProcessDropReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t mmProcessAlterReq(SMnodeMgmt *pMgmt, SNodeMsg *pMsg);
+int32_t mmProcessGetMonMmInfoReq(SMgmtWrapper *pWrapper, SNodeMsg *pReq);
 
 // mmWorker.c
 int32_t mmStartWorker(SMnodeMgmt *pMgmt);
@@ -59,6 +61,7 @@ int32_t mmProcessWriteMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t mmProcessSyncMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t mmProcessReadMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t mmProcessQueryMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
+int32_t mmProcessMonitorMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t mmPutMsgToQueryQueue(SMgmtWrapper *pWrapper, SRpcMsg *pRpc);
 int32_t mmPutMsgToReadQueue(SMgmtWrapper *pWrapper, SRpcMsg *pRpc);
 int32_t mmPutMsgToWriteQueue(SMgmtWrapper *pWrapper, SRpcMsg *pRpc);

source/dnode/mgmt/inc/qmInt.h

@@ -30,6 +30,7 @@ typedef struct SQnodeMgmt {
   const char   *path;
   SSingleWorker queryWorker;
   SSingleWorker fetchWorker;
+  SSingleWorker monitorWorker;
 } SQnodeMgmt;
 
 // qmInt.c
@@ -40,6 +41,7 @@ int32_t qmDrop(SMgmtWrapper *pWrapper);
 void    qmInitMsgHandle(SMgmtWrapper *pWrapper);
 int32_t qmProcessCreateReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t qmProcessDropReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
+int32_t qmProcessGetMonQmInfoReq(SMgmtWrapper *pWrapper, SNodeMsg *pReq);
 
 // qmWorker.c
 int32_t qmPutMsgToQueryQueue(SMgmtWrapper *pWrapper, SRpcMsg *pMsg);
@@ -50,6 +52,7 @@ int32_t qmStartWorker(SQnodeMgmt *pMgmt);
 void    qmStopWorker(SQnodeMgmt *pMgmt);
 int32_t qmProcessQueryMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t qmProcessFetchMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
+int32_t qmProcessMonitorMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 
 #ifdef __cplusplus
 }

source/dnode/mgmt/inc/smInt.h

@@ -32,6 +32,7 @@ typedef struct SSnodeMgmt {
   int8_t        uniqueWorkerInUse;
   SArray       *uniqueWorkers;  // SArray<SMultiWorker*>
   SSingleWorker sharedWorker;
+  SSingleWorker monitorWorker;
 } SSnodeMgmt;
 
 // smInt.c
@@ -42,6 +43,7 @@ int32_t smDrop(SMgmtWrapper *pWrapper);
 void    smInitMsgHandle(SMgmtWrapper *pWrapper);
 int32_t smProcessCreateReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t smProcessDropReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
+int32_t smProcessGetMonSmInfoReq(SMgmtWrapper *pWrapper, SNodeMsg *pReq);
 
 // smWorker.c
 int32_t smStartWorker(SSnodeMgmt *pMgmt);
@@ -50,6 +52,7 @@ int32_t smProcessMgmtMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t smProcessUniqueMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t smProcessSharedMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t smProcessExecMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
+int32_t smProcessMonitorMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 
 #ifdef __cplusplus
 }

source/dnode/mgmt/inc/vmInt.h

@@ -39,6 +39,7 @@ typedef struct SVnodesMgmt {
   SDnode       *pDnode;
   SMgmtWrapper *pWrapper;
   SSingleWorker mgmtWorker;
+  SSingleWorker monitorWorker;
 } SVnodesMgmt;
 
 typedef struct {
@@ -92,6 +93,8 @@ int32_t vmProcessAlterVnodeReq(SVnodesMgmt *pMgmt, SNodeMsg *pReq);
 int32_t vmProcessDropVnodeReq(SVnodesMgmt *pMgmt, SNodeMsg *pReq);
 int32_t vmProcessSyncVnodeReq(SVnodesMgmt *pMgmt, SNodeMsg *pReq);
 int32_t vmProcessCompactVnodeReq(SVnodesMgmt *pMgmt, SNodeMsg *pReq);
+int32_t vmProcessGetMonVmInfoReq(SMgmtWrapper *pWrapper, SNodeMsg *pReq);
+int32_t vmProcessGetVnodeLoadsReq(SMgmtWrapper *pWrapper, SNodeMsg *pReq);
 
 // vmFile.c
 int32_t     vmGetVnodesFromFile(SVnodesMgmt *pMgmt, SWrapperCfg **ppCfgs, int32_t *numOfVnodes);
@@ -115,6 +118,7 @@ int32_t vmProcessQueryMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t vmProcessFetchMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t vmProcessMergeMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 int32_t vmProcessMgmtMsg(SMgmtWrapper *pWrappert, SNodeMsg *pMsg);
+int32_t vmProcessMonitorMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
 
 #ifdef __cplusplus
 }

source/dnode/mgmt/mm/mmHandle.c

@@ -25,6 +25,29 @@ void mmGetMonitorInfo(SMgmtWrapper *pWrapper, SMonMmInfo *mmInfo) {
   }
 }
 
+int32_t mmProcessGetMonMmInfoReq(SMgmtWrapper *pWrapper, SNodeMsg *pReq) {
+  SMonMmInfo mmInfo = {0};
+  mmGetMonitorInfo(pWrapper, &mmInfo);
+
+  int32_t rspLen = tSerializeSMonMmInfo(NULL, 0, &mmInfo);
+  if (rspLen < 0) {
+    terrno = TSDB_CODE_INVALID_MSG;
+    return -1;
+  }
+
+  void *pRsp = rpcMallocCont(rspLen);
+  if (pRsp == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  tSerializeSMonMmInfo(pRsp, rspLen, &mmInfo);
+  pReq->pRsp = pRsp;
+  pReq->rspLen = rspLen;
+  tFreeSMonMmInfo(&mmInfo);
+  return 0;
+}
+
 int32_t mmProcessCreateReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
   SDnode  *pDnode = pWrapper->pDnode;
   SRpcMsg *pReq = &pMsg->rpcMsg;
@@ -83,6 +106,8 @@ int32_t mmProcessAlterReq(SMnodeMgmt *pMgmt, SNodeMsg *pMsg) {
 }
 
 void mmInitMsgHandle(SMgmtWrapper *pWrapper) {
+  dndSetMsgHandle(pWrapper, TDMT_MON_MM_INFO, mmProcessMonitorMsg, DEFAULT_HANDLE);
+
   // Requests handled by DNODE
   dndSetMsgHandle(pWrapper, TDMT_DND_CREATE_MNODE_RSP, mmProcessWriteMsg, DEFAULT_HANDLE);
   dndSetMsgHandle(pWrapper, TDMT_DND_ALTER_MNODE_RSP, mmProcessWriteMsg, DEFAULT_HANDLE);

source/dnode/mgmt/mm/mmWorker.c

@@ -23,11 +23,13 @@ static void mmProcessQueue(SQueueInfo *pInfo, SNodeMsg *pMsg) {
   SRpcMsg *pRpc = &pMsg->rpcMsg;
   int32_t  code = -1;
 
-  if (pMsg->rpcMsg.msgType != TDMT_DND_ALTER_MNODE) {
+  if (pMsg->rpcMsg.msgType == TDMT_DND_ALTER_MNODE) {
+    code = mmProcessAlterReq(pMgmt, pMsg);
+  } else if (pMsg->rpcMsg.msgType == TDMT_MON_MM_INFO) {
+    code = mmProcessGetMonMmInfoReq(pMgmt->pWrapper, pMsg);
+  } else {
     pMsg->pNode = pMgmt->pMnode;
     code = mndProcessMsg(pMsg);
-  } else {
-    code = mmProcessAlterReq(pMgmt, pMsg);
   }
 
   if (pRpc->msgType & 1U) {
@@ -98,6 +100,15 @@ int32_t mmProcessQueryMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
   return 0;
 }
 
+int32_t mmProcessMonitorMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
+  SMnodeMgmt    *pMgmt = pWrapper->pMgmt;
+  SSingleWorker *pWorker = &pMgmt->monitorWorker;
+
+  dTrace("msg:%p, put into worker:%s", pMsg, pWorker->name);
+  taosWriteQitem(pWorker->queue, pMsg);
+  return 0;
+}
+
 static int32_t mmPutRpcMsgToWorker(SSingleWorker *pWorker, SRpcMsg *pRpc) {
   SNodeMsg *pMsg = taosAllocateQitem(sizeof(SNodeMsg));
   if (pMsg == NULL) return -1;
@@ -157,15 +168,24 @@ int32_t mmStartWorker(SMnodeMgmt *pMgmt) {
 
   SSingleWorkerCfg sCfg = {.min = 1, .max = 1, .name = "mnode-sync", .fp = (FItem)mmProcessQueue, .param = pMgmt};
   if (tSingleWorkerInit(&pMgmt->syncWorker, &sCfg) != 0) {
-    dError("failed to start mnode sync-worker since %s", terrstr());
+    dError("failed to start mnode mnode-sync worker since %s", terrstr());
     return -1;
   }
 
+  if (tsMultiProcess) {
+    SSingleWorkerCfg sCfg = {.min = 1, .max = 1, .name = "mnode-monitor", .fp = (FItem)mmProcessQueue, .param = pMgmt};
+    if (tSingleWorkerInit(&pMgmt->monitorWorker, &sCfg) != 0) {
+      dError("failed to start mnode mnode-monitor worker since %s", terrstr());
+      return -1;
+    }
+  }
+
   dDebug("mnode workers are initialized");
   return 0;
 }
 
 void mmStopWorker(SMnodeMgmt *pMgmt) {
+  tSingleWorkerCleanup(&pMgmt->monitorWorker);
   tSingleWorkerCleanup(&pMgmt->queryWorker);
   tSingleWorkerCleanup(&pMgmt->readWorker);
   tSingleWorkerCleanup(&pMgmt->writeWorker);

source/dnode/mgmt/qm/qmHandle.c

@@ -23,6 +23,29 @@ void qmGetMonitorInfo(SMgmtWrapper *pWrapper, SMonQmInfo *qmInfo) {
   }
 }
 
+int32_t qmProcessGetMonQmInfoReq(SMgmtWrapper *pWrapper, SNodeMsg *pReq) {
+  SMonQmInfo qmInfo = {0};
+  qmGetMonitorInfo(pWrapper, &qmInfo);
+
+  int32_t rspLen = tSerializeSMonQmInfo(NULL, 0, &qmInfo);
+  if (rspLen < 0) {
+    terrno = TSDB_CODE_INVALID_MSG;
+    return -1;
+  }
+
+  void *pRsp = rpcMallocCont(rspLen);
+  if (pRsp == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  tSerializeSMonQmInfo(pRsp, rspLen, &qmInfo);
+  pReq->pRsp = pRsp;
+  pReq->rspLen = rspLen;
+  tFreeSMonQmInfo(&qmInfo);
+  return 0;
+}
+
 int32_t qmProcessCreateReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
   SDnode  *pDnode = pWrapper->pDnode;
   SRpcMsg *pReq = &pMsg->rpcMsg;
@@ -62,6 +85,8 @@ int32_t qmProcessDropReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
 }
 
 void qmInitMsgHandle(SMgmtWrapper *pWrapper) {
+  dndSetMsgHandle(pWrapper, TDMT_MON_QM_INFO, qmProcessMonitorMsg, DEFAULT_HANDLE);
+
   // Requests handled by VNODE
   dndSetMsgHandle(pWrapper, TDMT_VND_QUERY, qmProcessQueryMsg, QNODE_HANDLE);
   dndSetMsgHandle(pWrapper, TDMT_VND_QUERY_CONTINUE, qmProcessQueryMsg, QNODE_HANDLE);

source/dnode/mgmt/qm/qmWorker.c

@@ -21,6 +21,33 @@ static void qmSendRsp(SMgmtWrapper *pWrapper, SNodeMsg *pMsg, int32_t code) {
   tmsgSendRsp(&rsp);
 }
 
+static void qmProcessMonQueue(SQueueInfo *pInfo, SNodeMsg *pMsg) {
+  SQnodeMgmt *pMgmt = pInfo->ahandle;
+
+  dTrace("msg:%p, get from qnode monitor queue", pMsg);
+  SRpcMsg *pRpc = &pMsg->rpcMsg;
+  int32_t  code = -1;
+
+  if (pMsg->rpcMsg.msgType == TDMT_MON_SM_INFO) {
+    code = qmProcessGetMonQmInfoReq(pMgmt->pWrapper, pMsg);
+  }
+
+  if (pRpc->msgType & 1U) {
+    if (pRpc->handle != NULL && code != TSDB_CODE_MND_ACTION_IN_PROGRESS) {
+      if (code != 0) {
+        code = terrno;
+        dError("msg:%p, failed to process since %s", pMsg, terrstr());
+      }
+      SRpcMsg rsp = {.handle = pRpc->handle, .code = code, .contLen = pMsg->rspLen, .pCont = pMsg->pRsp};
+      tmsgSendRsp(&rsp);
+    }
+  }
+
+  dTrace("msg:%p, is freed, result:0x%04x:%s", pMsg, code & 0XFFFF, tstrerror(code));
+  rpcFreeCont(pRpc->pCont);
+  taosFreeQitem(pMsg);
+}
+
 static void qmProcessQueryQueue(SQueueInfo *pInfo, SNodeMsg *pMsg) {
   SQnodeMgmt *pMgmt = pInfo->ahandle;
 
@@ -66,6 +93,15 @@ int32_t qmProcessFetchMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
   return 0;
 }
 
+int32_t qmProcessMonitorMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
+  SQnodeMgmt    *pMgmt = pWrapper->pMgmt;
+  SSingleWorker *pWorker = &pMgmt->monitorWorker;
+
+  dTrace("msg:%p, put into worker:%s", pMsg, pWorker->name);
+  taosWriteQitem(pWorker->queue, pMsg);
+  return 0;
+}
+
 static int32_t qmPutRpcMsgToWorker(SQnodeMgmt *pMgmt, SSingleWorker *pWorker, SRpcMsg *pRpc) {
   SNodeMsg *pMsg = taosAllocateQitem(sizeof(SNodeMsg));
   if (pMsg == NULL) {
@@ -128,11 +164,21 @@ int32_t qmStartWorker(SQnodeMgmt *pMgmt) {
     return -1;
   }
 
+  if (tsMultiProcess) {
+    SSingleWorkerCfg sCfg = {
+        .min = 1, .max = 1, .name = "qnode-monitor", .fp = (FItem)qmProcessMonQueue, .param = pMgmt};
+    if (tSingleWorkerInit(&pMgmt->monitorWorker, &sCfg) != 0) {
+      dError("failed to start qnode-monitor worker since %s", terrstr());
+      return -1;
+    }
+  }
+
   dDebug("qnode workers are initialized");
   return 0;
 }
 
 void qmStopWorker(SQnodeMgmt *pMgmt) {
+  tSingleWorkerCleanup(&pMgmt->monitorWorker);
   tSingleWorkerCleanup(&pMgmt->queryWorker);
   tSingleWorkerCleanup(&pMgmt->fetchWorker);
   dDebug("qnode workers are closed");

source/dnode/mgmt/sm/smHandle.c

@@ -23,6 +23,29 @@ void smGetMonitorInfo(SMgmtWrapper *pWrapper, SMonSmInfo *smInfo) {
   }
 }
 
+int32_t smProcessGetMonSmInfoReq(SMgmtWrapper *pWrapper, SNodeMsg *pReq) {
+  SMonSmInfo smInfo = {0};
+  smGetMonitorInfo(pWrapper, &smInfo);
+  
+  int32_t rspLen = tSerializeSMonSmInfo(NULL, 0, &smInfo);
+  if (rspLen < 0) {
+    terrno = TSDB_CODE_INVALID_MSG;
+    return -1;
+  }
+
+  void *pRsp = rpcMallocCont(rspLen);
+  if (pRsp == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  tSerializeSMonSmInfo(pRsp, rspLen, &smInfo);
+  pReq->pRsp = pRsp;
+  pReq->rspLen = rspLen;
+  tFreeSMonSmInfo(&smInfo);
+  return 0;
+}
+
 int32_t smProcessCreateReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
   SDnode  *pDnode = pWrapper->pDnode;
   SRpcMsg *pReq = &pMsg->rpcMsg;
@@ -62,6 +85,8 @@ int32_t smProcessDropReq(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
 }
 
 void smInitMsgHandle(SMgmtWrapper *pWrapper) {
+  dndSetMsgHandle(pWrapper, TDMT_MON_SM_INFO, smProcessMonitorMsg, DEFAULT_HANDLE);
+
   // Requests handled by SNODE
   dndSetMsgHandle(pWrapper, TDMT_SND_TASK_DEPLOY, smProcessMgmtMsg, DEFAULT_HANDLE);
   dndSetMsgHandle(pWrapper, TDMT_SND_TASK_EXEC, smProcessExecMsg, DEFAULT_HANDLE);

source/dnode/mgmt/sm/smWorker.c

@@ -16,6 +16,33 @@
 #define _DEFAULT_SOURCE
 #include "smInt.h"
 
+static void smProcessMonitorQueue(SQueueInfo *pInfo, SNodeMsg *pMsg) {
+  SSnodeMgmt *pMgmt = pInfo->ahandle;
+
+  dTrace("msg:%p, get from snode monitor queue", pMsg);
+  SRpcMsg *pRpc = &pMsg->rpcMsg;
+  int32_t  code = -1;
+
+  if (pMsg->rpcMsg.msgType == TDMT_MON_SM_INFO) {
+    code = smProcessGetMonSmInfoReq(pMgmt->pWrapper, pMsg);
+  }
+
+  if (pRpc->msgType & 1U) {
+    if (pRpc->handle != NULL && code != TSDB_CODE_MND_ACTION_IN_PROGRESS) {
+      if (code != 0) {
+        code = terrno;
+        dError("msg:%p, failed to process since %s", pMsg, terrstr());
+      }
+      SRpcMsg rsp = {.handle = pRpc->handle, .code = code, .contLen = pMsg->rspLen, .pCont = pMsg->pRsp};
+      tmsgSendRsp(&rsp);
+    }
+  }
+
+  dTrace("msg:%p, is freed, result:0x%04x:%s", pMsg, code & 0XFFFF, tstrerror(code));
+  rpcFreeCont(pRpc->pCont);
+  taosFreeQitem(pMsg);
+}
+
 static void smProcessUniqueQueue(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
   SSnodeMgmt *pMgmt = pInfo->ahandle;
 
@@ -80,11 +107,21 @@ int32_t smStartWorker(SSnodeMgmt *pMgmt) {
     return -1;
   }
 
+  if (tsMultiProcess) {
+    SSingleWorkerCfg sCfg = {
+        .min = 1, .max = 1, .name = "snode-monitor", .fp = (FItem)smProcessMonitorQueue, .param = pMgmt};
+    if (tSingleWorkerInit(&pMgmt->monitorWorker, &sCfg) != 0) {
+      dError("failed to start snode-monitor worker since %s", terrstr());
+      return -1;
+    }
+  }
+
   dDebug("snode workers are initialized");
   return 0;
 }
 
 void smStopWorker(SSnodeMgmt *pMgmt) {
+  tSingleWorkerCleanup(&pMgmt->monitorWorker);
   for (int32_t i = 0; i < taosArrayGetSize(pMgmt->uniqueWorkers); i++) {
     SMultiWorker *pWorker = taosArrayGetP(pMgmt->uniqueWorkers, i);
     tMultiWorkerCleanup(pWorker);
@@ -120,6 +157,15 @@ int32_t smProcessMgmtMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
   return 0;
 }
 
+int32_t smProcessMonitorMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
+  SSnodeMgmt    *pMgmt = pWrapper->pMgmt;
+  SSingleWorker *pWorker = &pMgmt->monitorWorker;
+
+  dTrace("msg:%p, put into worker:%s", pMsg, pWorker->name);
+  taosWriteQitem(pWorker->queue, pMsg);
+  return 0;
+}
+
 int32_t smProcessUniqueMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
   SSnodeMgmt   *pMgmt = pWrapper->pMgmt;
   int32_t       index = smGetSWIdFromMsg(&pMsg->rpcMsg);

source/dnode/mgmt/vm/vmHandle.c

@@ -38,6 +38,52 @@ void vmGetMonitorInfo(SMgmtWrapper *pWrapper, SMonVmInfo *vmInfo) {
   }
 }
 
+int32_t vmProcessGetMonVmInfoReq(SMgmtWrapper *pWrapper, SNodeMsg *pReq) {
+  SMonVmInfo vmInfo = {0};
+  vmGetMonitorInfo(pWrapper, &vmInfo);
+
+  int32_t rspLen = tSerializeSMonVmInfo(NULL, 0, &vmInfo);
+  if (rspLen < 0) {
+    terrno = TSDB_CODE_INVALID_MSG;
+    return -1;
+  }
+
+  void *pRsp = rpcMallocCont(rspLen);
+  if (pRsp == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  tSerializeSMonVmInfo(pRsp, rspLen, &vmInfo);
+  pReq->pRsp = pRsp;
+  pReq->rspLen = rspLen;
+  tFreeSMonVmInfo(&vmInfo);
+  return 0;
+}
+
+int32_t vmProcessGetVnodeLoadsReq(SMgmtWrapper *pWrapper, SNodeMsg *pReq) {
+  SMonVloadInfo vloads = {0};
+  vmGetVnodeLoads(pWrapper, &vloads);
+
+  int32_t rspLen = tSerializeSMonVloadInfo(NULL, 0, &vloads);
+  if (rspLen < 0) {
+    terrno = TSDB_CODE_INVALID_MSG;
+    return -1;
+  }
+
+  void *pRsp = rpcMallocCont(rspLen);
+  if (pRsp == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  tSerializeSMonVloadInfo(pRsp, rspLen, &vloads);
+  pReq->pRsp = pRsp;
+  pReq->rspLen = rspLen;
+  tFreeSMonVloadInfo(&vloads);
+  return 0;
+}
+
 static void vmGenerateVnodeCfg(SCreateVnodeReq *pCreate, SVnodeCfg *pCfg) {
   pCfg->vgId = pCreate->vgId;
   pCfg->wsize = pCreate->cacheBlockSize;
@@ -261,6 +307,9 @@ int32_t vmProcessCompactVnodeReq(SVnodesMgmt *pMgmt, SNodeMsg *pMsg) {
 }
 
 void vmInitMsgHandle(SMgmtWrapper *pWrapper) {
+  dndSetMsgHandle(pWrapper, TDMT_MON_VM_INFO, vmProcessMonitorMsg, DEFAULT_HANDLE);
+  dndSetMsgHandle(pWrapper, TDMT_MON_VM_LOAD, vmProcessMonitorMsg, DEFAULT_HANDLE);
+
   // Requests handled by VNODE
   dndSetMsgHandle(pWrapper, TDMT_VND_SUBMIT, (NodeMsgFp)vmProcessWriteMsg, DEFAULT_HANDLE);
   dndSetMsgHandle(pWrapper, TDMT_VND_QUERY, (NodeMsgFp)vmProcessQueryMsg, DEFAULT_HANDLE);

source/dnode/mgmt/vm/vmWorker.c

@@ -29,6 +29,12 @@ static void vmProcessMgmtQueue(SQueueInfo *pInfo, SNodeMsg *pMsg) {
   dTrace("msg:%p, will be processed in vnode-mgmt queue", pMsg);
 
   switch (msgType) {
+    case TDMT_MON_VM_INFO:
+      code = vmProcessGetMonVmInfoReq(pMgmt->pWrapper, pMsg);
+      break;
+    case TDMT_MON_VM_LOAD:
+      code = vmProcessGetVnodeLoadsReq(pMgmt->pWrapper, pMsg);
+      break;
     case TDMT_DND_CREATE_VNODE:
       code = vmProcessCreateVnodeReq(pMgmt, pMsg);
       break;
@@ -255,6 +261,15 @@ int32_t vmProcessMgmtMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
   return 0;
 }
 
+int32_t vmProcessMonitorMsg(SMgmtWrapper *pWrapper, SNodeMsg *pMsg) {
+  SVnodesMgmt   *pMgmt = pWrapper->pMgmt;
+  SSingleWorker *pWorker = &pMgmt->monitorWorker;
+
+  dTrace("msg:%p, put into worker:%s", pMsg, pWorker->name);
+  taosWriteQitem(pWorker->queue, pMsg);
+  return 0;
+}
+
 static int32_t vmPutRpcMsgToQueue(SMgmtWrapper *pWrapper, SRpcMsg *pRpc, EQueueType qtype) {
   SVnodesMgmt *pMgmt = pWrapper->pMgmt;
   SMsgHead    *pHead = pRpc->pCont;
@@ -412,11 +427,21 @@ int32_t vmStartWorker(SVnodesMgmt *pMgmt) {
     return -1;
   }
 
+  if (tsMultiProcess) {
+    SSingleWorkerCfg sCfg = {
+        .min = 1, .max = 1, .name = "vnode-monitor", .fp = (FItem)vmProcessMgmtQueue, .param = pMgmt};
+    if (tSingleWorkerInit(&pMgmt->monitorWorker, &sCfg) != 0) {
+      dError("failed to start mnode vnode-monitor worker since %s", terrstr());
+      return -1;
+    }
+  }
+
   dDebug("vnode workers are initialized");
   return 0;
 }
 
 void vmStopWorker(SVnodesMgmt *pMgmt) {
+  tSingleWorkerCleanup(&pMgmt->monitorWorker);
   tSingleWorkerCleanup(&pMgmt->mgmtWorker);
   tQWorkerCleanup(&pMgmt->fetchPool);
   tQWorkerCleanup(&pMgmt->queryPool);

source/libs/monitor/src/monMain.c

@@ -187,6 +187,7 @@ static void monGenBasicJson(SMonInfo *pMonitor) {
 
 static void monGenClusterJson(SMonInfo *pMonitor) {
   SMonClusterInfo *pInfo = &pMonitor->mmInfo.cluster;
+  if (pMonitor->mmInfo.cluster.first_ep_dnode_id == 0) return;
 
   SJson *pJson = tjsonCreateObject();
   if (pJson == NULL) return;
@@ -239,6 +240,7 @@ static void monGenClusterJson(SMonInfo *pMonitor) {
 
 static void monGenVgroupJson(SMonInfo *pMonitor) {
   SMonVgroupInfo *pInfo = &pMonitor->mmInfo.vgroup;
+  if (pMonitor->mmInfo.cluster.first_ep_dnode_id == 0) return;
 
   SJson *pJson = tjsonAddArrayToObject(pMonitor->pJson, "vgroup_infos");
   if (pJson == NULL) return;
@@ -277,6 +279,7 @@ static void monGenVgroupJson(SMonInfo *pMonitor) {
 
 static void monGenGrantJson(SMonInfo *pMonitor) {
   SMonGrantInfo *pInfo = &pMonitor->mmInfo.grant;
+  if (pMonitor->mmInfo.cluster.first_ep_dnode_id == 0) return;
 
   SJson *pJson = tjsonCreateObject();
   if (pJson == NULL) return;

source/util/src/tconfig.c

@@ -348,7 +348,7 @@ SConfigItem *cfgGetItem(SConfig *pCfg, const char *name) {
     }
   }
 
-  uError("name:%s, cfg not found", name);
+  // uError("name:%s, cfg not found", name);
   terrno = TSDB_CODE_CFG_NOT_FOUND;
   return NULL;
 }