refactor: add standby option for mnode

include/dnode/mnode/mnode.h

@@ -29,6 +29,7 @@ extern "C" {
 typedef struct SMnode SMnode;
 
 typedef struct {
+  bool     isStandBy;
   bool     deploy;
   int8_t   replica;
   int8_t   selfIndex;

source/dnode/mgmt/mgmt_mnode/src/mmInt.c

@@ -55,7 +55,8 @@ static void mmBuildOptionForDeploy(SMnodeMgmt *pMgmt, const SMgmtInputOpt *pInpu
 
 static void mmBuildOptionForOpen(SMnodeMgmt *pMgmt, SMnodeOpt *pOption) {
   pOption->msgCb = pMgmt->msgCb;
-#if 1
+
+  if (pMgmt->replica > 1) {
     pOption->replica = 1;
     pOption->selfIndex = 0;
     SReplica *pReplica = &pOption->replicas[0];
@@ -67,7 +68,8 @@ static void mmBuildOptionForOpen(SMnodeMgmt *pMgmt, SMnodeOpt *pOption) {
       }
     }
     pMgmt->selfIndex = pOption->selfIndex;
-#else
+    pOption->isStandBy = 1;
+  } else {
     pOption->replica = pMgmt->replica;
     pOption->selfIndex = -1;
     memcpy(&pOption->replicas, pMgmt->replicas, sizeof(SReplica) * TSDB_MAX_REPLICA);
@@ -77,7 +79,7 @@ static void mmBuildOptionForOpen(SMnodeMgmt *pMgmt, SMnodeOpt *pOption) {
       }
     }
     pMgmt->selfIndex = pOption->selfIndex;
-#endif
+  }
   pOption->deploy = false;
 }
 

source/dnode/mnode/impl/src/mndSync.c

@@ -121,7 +121,8 @@ int32_t mndInitSync(SMnode *pMnode) {
   SSyncCfg *pCfg = &syncInfo.syncCfg;
   pCfg->replicaNum = pMnode->replica;
   pCfg->myIndex = pMnode->selfIndex;
-  mInfo("start to open mnode sync, replica:%d myIndex:%d", pCfg->replicaNum, pCfg->myIndex);
+  mInfo("start to open mnode sync, replica:%d myIndex:%d standBy:%d", pCfg->replicaNum, pCfg->myIndex,
+        pMgmt->isStandBy);
   for (int32_t i = 0; i < pMnode->replica; ++i) {
     SNodeInfo *pNode = &pCfg->nodeInfo[i];
     tstrncpy(pNode->nodeFqdn, pMnode->replicas[i].fqdn, sizeof(pNode->nodeFqdn));
@@ -201,7 +202,7 @@ bool mndIsMaster(SMnode *pMnode) {
 
 int32_t mndAlter(SMnode *pMnode, const SMnodeOpt *pOption) {
   SSyncCfg cfg = {.replicaNum = pOption->replica, .myIndex = pOption->selfIndex};
-  mInfo("start to alter mnode sync, replica:%d myIndex:%d", cfg.replicaNum, cfg.myIndex);
+  mInfo("start to alter mnode sync, replica:%d myIndex:%d standBy:%d", cfg.replicaNum, cfg.myIndex, pOption->isStandBy);
   for (int32_t i = 0; i < pOption->replica; ++i) {
     SNodeInfo *pNode = &cfg.nodeInfo[i];
     tstrncpy(pNode->nodeFqdn, pOption->replicas[i].fqdn, sizeof(pNode->nodeFqdn));
@@ -210,5 +211,6 @@ int32_t mndAlter(SMnode *pMnode, const SMnodeOpt *pOption) {
   }
 
   SSyncMgmt *pMgmt = &pMnode->syncMgmt;
+  pMgmt->isStandBy = pOption->isStandBy;
   return syncReconfig(pMgmt->sync, &cfg);
 }
\ No newline at end of file

source/dnode/mnode/impl/src/mnode.c

@@ -263,6 +263,7 @@ static void mndSetOptions(SMnode *pMnode, const SMnodeOpt *pOption) {
   memcpy(&pMnode->replicas, pOption->replicas, sizeof(SReplica) * TSDB_MAX_REPLICA);
   pMnode->msgCb = pOption->msgCb;
   pMnode->selfId = pOption->replicas[pOption->selfIndex].id;
+  pMnode->syncMgmt.isStandBy = pOption->isStandBy;
 }
 
 SMnode *mndOpen(const char *path, const SMnodeOpt *pOption) {