TD-10431 create dnode

include/common/taosmsg.h

@@ -829,7 +829,16 @@ typedef struct SShowRsp {
 
 typedef struct {
   char ep[TSDB_EP_LEN];  // end point, hostname:port
-} SCreateDnodeMsg, SDropDnodeMsg;
+} SCreateDnodeMsg;
+
+typedef struct {
+  int32_t dnodeId;
+} SDropDnodeMsg;
+
+typedef struct {
+  int32_t dnodeId;
+  char    config[128];
+} SCfgDnodeMsg;
 
 typedef struct {
   int32_t  dnodeId;
@@ -849,11 +858,6 @@ typedef struct {
   int32_t vgId;
 } SConfigVnodeMsg;
 
-typedef struct {
-  char ep[TSDB_EP_LEN];  // end point, hostname:port
-  char config[64];
-} SCfgDnodeMsg;
-
 typedef struct {
   char    sql[TSDB_SHOW_SQL_LEN];
   int32_t queryId;

include/common/tglobal.h

@@ -196,7 +196,6 @@ extern SDiskCfg tsDiskCfg[];
 void    taosInitGlobalCfg();
 int32_t taosCheckGlobalCfg();
 int32_t taosCfgDynamicOptions(char *msg);
-int     taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port);
 bool    taosCheckBalanceCfgOptions(const char *option, int32_t *vnodeId, int32_t *dnodeId);
 void    taosAddDataDir(int index, char *v1, int level, int primary);
 void    taosReadDataDirCfg(char *v1, char *v2, char *v3);

include/util/tutil.h

@@ -21,22 +21,22 @@ extern "C" {
 #endif
 
 #include "os.h"
-#include "tmd5.h"
 #include "tcrc32c.h"
 #include "tdef.h"
+#include "tmd5.h"
 
 int32_t strdequote(char *src);
-int32_t strndequote(char *dst, const char* z, int32_t len);
+int32_t strndequote(char *dst, const char *z, int32_t len);
 int32_t strRmquote(char *z, int32_t len);
 size_t  strtrim(char *src);
-char *  strnchr(char *haystack, char needle, int32_t len, bool skipquote);
-char ** strsplit(char *src, const char *delim, int32_t *num);
-char *  strtolower(char *dst, const char *src);
-char *  strntolower(char *dst, const char *src, int32_t n);
-char *  strntolower_s(char *dst, const char *src, int32_t n);
+char   *strnchr(char *haystack, char needle, int32_t len, bool skipquote);
+char  **strsplit(char *src, const char *delim, int32_t *num);
+char   *strtolower(char *dst, const char *src);
+char   *strntolower(char *dst, const char *src, int32_t n);
+char   *strntolower_s(char *dst, const char *src, int32_t n);
 int64_t strnatoi(char *num, int32_t len);
-char *  strbetween(char *string, char *begin, char *end);
-char *  paGetToken(char *src, char **token, int32_t *tokenLen);
+char   *strbetween(char *string, char *begin, char *end);
+char   *paGetToken(char *src, char **token, int32_t *tokenLen);
 
 int32_t taosByteArrayToHexStr(char bytes[], int32_t len, char hexstr[]);
 int32_t taosHexStrToByteArray(char hexstr[], char bytes[]);
@@ -45,11 +45,12 @@ char    *taosIpStr(uint32_t ipInt);
 uint32_t ip2uint(const char *const ip_addr);
 void     taosIp2String(uint32_t ip, char *str);
 void     taosIpPort2String(uint32_t ip, uint16_t port, char *str);
+int32_t  taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port);
 
 static FORCE_INLINE void taosEncryptPass(uint8_t *inBuf, size_t inLen, char *target) {
   MD5_CTX context;
   MD5Init(&context);
-  MD5Update(&context, inBuf, (unsigned int)inLen);
+  MD5Update(&context, inBuf, (uint32_t)inLen);
   MD5Final(&context);
   memcpy(target, context.digest, TSDB_KEY_LEN);
 }
@@ -58,4 +59,4 @@ static FORCE_INLINE void taosEncryptPass(uint8_t *inBuf, size_t inLen, char *tar
 }
 #endif
 
-#endif  /*_TD_UTIL_UTIL_H*/
+#endif /*_TD_UTIL_UTIL_H*/

source/common/src/tglobal.c

@@ -1738,24 +1738,6 @@ int32_t taosCheckGlobalCfg() {
   return 0;
 }
 
-int taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port) {
-  *port = 0;
-  strcpy(fqdn, ep);
-
-  char *temp = strchr(fqdn, ':');
-  if (temp) {   
-    *temp = 0;
-    *port = atoi(temp+1);
-  } 
-  
-  if (*port == 0) {
-    *port = tsServerPort;
-    return -1;
-  }
-
-  return 0; 
-}
-
 /*
  * alter dnode 1 balance "vnode:1-dnode:2"
  */

source/dnode/mnode/impl/inc/mndDef.h

@@ -286,23 +286,21 @@ typedef struct SFuncObj {
   char    pData[];
 } SFuncObj;
 
-typedef struct SShowObj SShowObj;
-typedef struct SShowObj {
-  int8_t     type;
-  int8_t     maxReplica;
-  int16_t    numOfColumns;
-  int32_t    id;
-  int32_t    rowSize;
-  int32_t    numOfRows;
-  int32_t    numOfReads;
-  uint16_t   payloadLen;
-  void      *pIter;
-  void      *pVgIter;
-  SMnode    *pMnode;
-  char       db[TSDB_FULL_DB_NAME_LEN];
-  int16_t    offset[TSDB_MAX_COLUMNS];
-  int32_t    bytes[TSDB_MAX_COLUMNS];
-  char       payload[];
+typedef struct {
+  int32_t id;
+  int8_t  type;
+  int8_t  replica;
+  int16_t numOfColumns;
+  int32_t rowSize;
+  int32_t numOfRows;
+  int32_t numOfReads;
+  int32_t payloadLen;
+  void   *pIter;
+  SMnode *pMnode;
+  char    db[TSDB_FULL_DB_NAME_LEN];
+  int16_t offset[TSDB_MAX_COLUMNS];
+  int32_t bytes[TSDB_MAX_COLUMNS];
+  char    payload[];
 } SShowObj;
 
 typedef struct SMnodeMsg {

source/dnode/mnode/impl/inc/mndDnode.h

@@ -26,6 +26,7 @@ int32_t    mndInitDnode(SMnode *pMnode);
 void       mndCleanupDnode(SMnode *pMnode);
 SDnodeObj *mndAcquireDnode(SMnode *pMnode, int32_t dnodeId);
 void       mndReleaseDnode(SMnode *pMnode, SDnodeObj *pDnode);
+SEpSet     mndGetDnodeEpset(SDnodeObj *pDnode);
 
 #ifdef __cplusplus
 }

source/dnode/mnode/impl/inc/mndShow.h

@@ -28,6 +28,7 @@ void    mndAddShowMetaHandle(SMnode *pMnode, EShowType showType, ShowMetaFp fp);
 void    mndAddShowRetrieveHandle(SMnode *pMnode, EShowType showType, ShowRetrieveFp fp);
 void    mndAddShowFreeIterHandle(SMnode *pMnode, EShowType msgType, ShowFreeIterFp fp);
 void    mnodeVacuumResult(char *data, int32_t numOfCols, int32_t rows, int32_t capacity, SShowObj *pShow);
+char   *mndShowStr(int32_t showType);
 
 #ifdef __cplusplus
 }

source/dnode/mnode/impl/inc/mndVgroup.h

@@ -24,6 +24,7 @@ extern "C" {
 
 int32_t mndInitVgroup(SMnode *pMnode);
 void    mndCleanupVgroup(SMnode *pMnode);
+int32_t mndGetVnodesNum(SMnode *pMnode, int32_t dnodeId);
 
 #ifdef __cplusplus
 }

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

@@ -16,12 +16,17 @@
 #define _DEFAULT_SOURCE
 #include "mndDnode.h"
 #include "mndMnode.h"
+#include "mndShow.h"
 #include "mndTrans.h"
 #include "ttime.h"
+#include "tutil.h"
 
-#define SDB_DNODE_VER 1
+#define TSDB_DNODE_VER 1
+#define TSDB_CONFIG_OPTION_LEN 16
+#define TSDB_CONIIG_VALUE_LEN 48
+#define TSDB_CONFIG_NUMBER 8
 
-static char *offlineReason[] = {
+static const char *offlineReason[] = {
     "",
     "status msg timeout",
     "status not received",
@@ -36,16 +41,27 @@ static char *offlineReason[] = {
     "unknown",
 };
 
+static const char *dnodeStatus[] = {"offline", "ready", "creating", "dropping"};
+
 static int32_t  mndCreateDefaultDnode(SMnode *pMnode);
 static SSdbRaw *mndDnodeActionEncode(SDnodeObj *pDnode);
 static SSdbRow *mndDnodeActionDecode(SSdbRaw *pRaw);
 static int32_t  mndDnodeActionInsert(SSdb *pSdb, SDnodeObj *pDnode);
 static int32_t  mndDnodeActionDelete(SSdb *pSdb, SDnodeObj *pDnode);
 static int32_t  mndDnodeActionUpdate(SSdb *pSdb, SDnodeObj *pOldDnode, SDnodeObj *pNewDnode);
-static int32_t  mndProcessCreateDnodeMsg(SMnodeMsg *pMsg);
-static int32_t  mndProcessDropDnodeMsg(SMnodeMsg *pMsg);
-static int32_t  mndProcessConfigDnodeMsg(SMnodeMsg *pMsg);
-static int32_t  mndProcessStatusMsg(SMnodeMsg *pMsg);
+
+static int32_t mndProcessCreateDnodeMsg(SMnodeMsg *pMsg);
+static int32_t mndProcessDropDnodeMsg(SMnodeMsg *pMsg);
+static int32_t mndProcessConfigDnodeMsg(SMnodeMsg *pMsg);
+static int32_t mndProcessConfigDnodeRsp(SMnodeMsg *pMsg);
+static int32_t mndProcessStatusMsg(SMnodeMsg *pMsg);
+
+static int32_t mndGetConfigMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t mndRetrieveConfigs(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void    mndCancelGetNextConfig(SMnode *pMnode, void *pIter);
+static int32_t mndGetDnodeMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t mndRetrieveDnodes(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void    mndCancelGetNextDnode(SMnode *pMnode, void *pIter);
 
 int32_t mndInitDnode(SMnode *pMnode) {
   SSdbTable table = {.sdbType = SDB_DNODE,
@@ -60,8 +76,16 @@ int32_t mndInitDnode(SMnode *pMnode) {
   mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CREATE_DNODE, mndProcessCreateDnodeMsg);
   mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_DNODE, mndProcessDropDnodeMsg);
   mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CONFIG_DNODE, mndProcessConfigDnodeMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CONFIG_DNODE_IN_RSP, mndProcessConfigDnodeRsp);
   mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_STATUS, mndProcessStatusMsg);
 
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_VARIABLES, mndGetConfigMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_VARIABLES, mndRetrieveConfigs);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_VARIABLES, mndCancelGetNextConfig);
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_DNODE, mndGetDnodeMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_DNODE, mndRetrieveDnodes);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_DNODE, mndCancelGetNextDnode);
+
   return sdbSetTable(pMnode->pSdb, table);
 }
 
@@ -84,7 +108,7 @@ static int32_t mndCreateDefaultDnode(SMnode *pMnode) {
 }
 
 static SSdbRaw *mndDnodeActionEncode(SDnodeObj *pDnode) {
-  SSdbRaw *pRaw = sdbAllocRaw(SDB_DNODE, SDB_DNODE_VER, sizeof(SDnodeObj));
+  SSdbRaw *pRaw = sdbAllocRaw(SDB_DNODE, TSDB_DNODE_VER, sizeof(SDnodeObj));
   if (pRaw == NULL) return NULL;
 
   int32_t dataPos = 0;
@@ -102,7 +126,7 @@ static SSdbRow *mndDnodeActionDecode(SSdbRaw *pRaw) {
   int8_t sver = 0;
   if (sdbGetRawSoftVer(pRaw, &sver) != 0) return NULL;
 
-  if (sver != SDB_DNODE_VER) {
+  if (sver != TSDB_DNODE_VER) {
     terrno = TSDB_CODE_SDB_INVALID_DATA_VER;
     mError("failed to decode dnode since %s", terrstr());
     return NULL;
@@ -168,6 +192,12 @@ void mndReleaseDnode(SMnode *pMnode, SDnodeObj *pDnode) {
   sdbRelease(pSdb, pDnode);
 }
 
+SEpSet mndGetDnodeEpset(SDnodeObj *pDnode) {
+  SEpSet epSet = {.inUse = 0, .numOfEps = 1, .port[0] = pDnode->port};
+  memcpy(epSet.fqdn[0], pDnode->fqdn, TSDB_FQDN_LEN);
+  return epSet;
+}
+
 static SDnodeObj *mndAcquireDnodeByEp(SMnode *pMnode, char *pEpStr) {
   SSdb *pSdb = pMnode->pSdb;
 
@@ -358,8 +388,384 @@ static int32_t mndProcessStatusMsg(SMnodeMsg *pMsg) {
   return 0;
 }
 
-static int32_t mndProcessCreateDnodeMsg(SMnodeMsg *pMsg) { return 0; }
+static int32_t mndCreateDnode(SMnode *pMnode, SMnodeMsg *pMsg, SCreateDnodeMsg *pCreate) {
+  SDnodeObj dnodeObj = {0};
+  dnodeObj.id = 1;  // todo
+  dnodeObj.createdTime = taosGetTimestampMs();
+  dnodeObj.updateTime = dnodeObj.createdTime;
+  taosGetFqdnPortFromEp(pCreate->ep, dnodeObj.fqdn, &dnodeObj.port);
+
+  if (dnodeObj.fqdn[0] == 0 || dnodeObj.port <= 0) {
+    terrno = TSDB_CODE_SDB_APP_ERROR;
+    mError("dnode:%s, failed to create since %s", pCreate->ep, terrstr());
+    return terrno;
+  }
+
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    mError("dnode:%s, failed to create since %s", pCreate->ep, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to create dnode:%s", pTrans->id, pCreate->ep);
+
+  SSdbRaw *pRedoRaw = mndDnodeActionEncode(&dnodeObj);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_CREATING);
 
-static int32_t mndProcessDropDnodeMsg(SMnodeMsg *pMsg) { return 0; }
+  SSdbRaw *pUndoRaw = mndDnodeActionEncode(&dnodeObj);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_DROPPED);
+
+  SSdbRaw *pCommitRaw = mndDnodeActionEncode(&dnodeObj);
+  if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pCommitRaw, SDB_STATUS_READY);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  mndTransDrop(pTrans);
+  return 0;
+}
+
+static int32_t mndProcessCreateDnodeMsg(SMnodeMsg *pMsg) {
+  SMnode          *pMnode = pMsg->pMnode;
+  SCreateDnodeMsg *pCreate = pMsg->rpcMsg.pCont;
+
+  mDebug("dnode:%s, start to create", pCreate->ep);
+
+  if (pCreate->ep[0] == 0) {
+    terrno = TSDB_CODE_SDB_APP_ERROR;
+    mError("dnode:%s, failed to create since %s", pCreate->ep, terrstr());
+    return -1;
+  }
+
+  SDnodeObj *pDnode = mndAcquireDnodeByEp(pMnode, pCreate->ep);
+  if (pDnode != NULL) {
+    mError("dnode:%d, already exist", pDnode->id);
+    sdbRelease(pMnode->pSdb, pDnode);
+    terrno = TSDB_CODE_MND_DNODE_ALREADY_EXIST;
+    return -1;
+  }
 
-static int32_t mndProcessConfigDnodeMsg(SMnodeMsg *pMsg) { return 0; }
+  int32_t code = mndCreateDnode(pMnode, pMsg, pCreate);
+
+  if (code != 0) {
+    mError("dnode:%s, failed to create since %s", pCreate->ep, terrstr());
+    return -1;
+  }
+
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static int32_t mndDropDnode(SMnode *pMnode, SMnodeMsg *pMsg, SDnodeObj *pDnode) {
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    mError("dnode:%d, failed to drop since %s", pDnode->id, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to drop user:%d", pTrans->id, pDnode->id);
+
+  SSdbRaw *pRedoRaw = mndDnodeActionEncode(pDnode);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_DROPPING);
+
+  SSdbRaw *pUndoRaw = mndDnodeActionEncode(pDnode);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_READY);
+
+  SSdbRaw *pCommitRaw = mndDnodeActionEncode(pDnode);
+  if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pCommitRaw, SDB_STATUS_DROPPED);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  mndTransDrop(pTrans);
+  return 0;
+}
+
+static int32_t mndProcessDropDnodeMsg(SMnodeMsg *pMsg) {
+  SMnode        *pMnode = pMsg->pMnode;
+  SDropDnodeMsg *pDrop = pMsg->rpcMsg.pCont;
+  pDrop->dnodeId = htonl(pDrop->dnodeId);
+
+  mDebug("dnode:%d, start to drop", pDrop->dnodeId);
+
+  if (pDrop->dnodeId <= 0) {
+    terrno = TSDB_CODE_SDB_APP_ERROR;
+    mError("dnode:%d, failed to create since %s", pDrop->dnodeId, terrstr());
+    return -1;
+  }
+
+  SDnodeObj *pDnode = mndAcquireDnode(pMnode, pDrop->dnodeId);
+  if (pDnode == NULL) {
+    mError("dnode:%d, not exist", pDrop->dnodeId);
+    terrno = TSDB_CODE_MND_DNODE_NOT_EXIST;
+    return -1;
+  }
+
+  int32_t code = mndDropDnode(pMnode, pMsg, pDnode);
+
+  if (code != 0) {
+    mError("dnode:%d, failed to create since %s", pDrop->dnodeId, terrstr());
+    return -1;
+  }
+
+  sdbRelease(pMnode->pSdb, pDnode);
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static int32_t mndProcessConfigDnodeMsg(SMnodeMsg *pMsg) {
+  SMnode       *pMnode = pMsg->pMnode;
+  SCfgDnodeMsg *pCfg = pMsg->rpcMsg.pCont;
+  pCfg->dnodeId = htonl(pCfg->dnodeId);
+
+  SDnodeObj *pDnode = mndAcquireDnode(pMnode, pCfg->dnodeId);
+  if (pDnode == NULL) {
+    terrno = TSDB_CODE_MND_DNODE_NOT_EXIST;
+    mError("dnode:%d, failed to cfg since %s ", pCfg->dnodeId, terrstr());
+    return -1;
+  }
+
+  SEpSet epSet = mndGetDnodeEpset(pDnode);
+  mndReleaseDnode(pMnode, pDnode);
+
+  SCfgDnodeMsg *pCfgDnode = rpcMallocCont(sizeof(SCfgDnodeMsg));
+  pCfgDnode->dnodeId = htonl(pCfg->dnodeId);
+  memcpy(pCfgDnode->config, pCfg->config, 128);
+
+  SRpcMsg rpcMsg = {.msgType = TSDB_MSG_TYPE_CONFIG_DNODE_IN, .pCont = pCfgDnode, .contLen = sizeof(SCfgDnodeMsg)};
+
+  mInfo("dnode:%d, is configured", pCfg->dnodeId);
+  mndSendMsgToDnode(pMnode, &epSet, &rpcMsg);
+
+  return 0;
+}
+
+static int32_t mndProcessConfigDnodeRsp(SMnodeMsg *pMsg) { mInfo("cfg dnode rsp is received"); }
+
+static int32_t mndGetConfigMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->schema;
+
+  pShow->bytes[cols] = TSDB_CONFIG_OPTION_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  tstrncpy(pSchema[cols].name, "name", sizeof(pSchema[cols].name));
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = TSDB_CONIIG_VALUE_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  tstrncpy(pSchema[cols].name, "value", sizeof(pSchema[cols].name));
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  pShow->numOfRows = TSDB_CONFIG_NUMBER;
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  pShow->pIter = NULL;
+  strcpy(pMeta->tableFname, mndShowStr(pShow->type));
+
+  return 0;
+}
+
+static int32_t mndRetrieveConfigs(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode *pMnode = pMsg->pMnode;
+  int32_t numOfRows = 0;
+  char   *cfgOpts[TSDB_CONFIG_NUMBER] = {0};
+  char    cfgVals[TSDB_CONFIG_NUMBER][TSDB_CONIIG_VALUE_LEN + 1] = {0};
+  char   *pWrite;
+  int32_t cols = 0;
+
+  cfgOpts[numOfRows] = "statusInterval";
+  snprintf(cfgVals[numOfRows], TSDB_CONIIG_VALUE_LEN, "%d", pMnode->cfg.statusInterval);
+  numOfRows++;
+
+  cfgOpts[numOfRows] = "timezone";
+  snprintf(cfgVals[numOfRows], TSDB_CONIIG_VALUE_LEN, "%s", pMnode->cfg.timezone);
+  numOfRows++;
+
+  cfgOpts[numOfRows] = "locale";
+  snprintf(cfgVals[numOfRows], TSDB_CONIIG_VALUE_LEN, "%s", pMnode->cfg.locale);
+  numOfRows++;
+
+  cfgOpts[numOfRows] = "charset";
+  snprintf(cfgVals[numOfRows], TSDB_CONIIG_VALUE_LEN, "%s", pMnode->cfg.charset);
+  numOfRows++;
+
+  for (int32_t i = 0; i < numOfRows; i++) {
+    cols = 0;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, cfgOpts[i], TSDB_CONFIG_OPTION_LEN);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, cfgVals[i], TSDB_CONIIG_VALUE_LEN);
+    cols++;
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+  return numOfRows;
+}
+
+static void mndCancelGetNextConfig(SMnode *pMnode, void *pIter) {}
+
+static int32_t mndGetDnodeMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->schema;
+
+  pShow->bytes[cols] = 2;
+  pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+  strcpy(pSchema[cols].name, "id");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = TSDB_EP_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "end point");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 2;
+  pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+  strcpy(pSchema[cols].name, "vnodes");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 2;
+  pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+  strcpy(pSchema[cols].name, "cores");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 10 + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "status");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 8;
+  pSchema[cols].type = TSDB_DATA_TYPE_TIMESTAMP;
+  strcpy(pSchema[cols].name, "create time");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 24 + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "offline reason");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  pShow->numOfRows = sdbGetSize(pSdb, SDB_DNODE);
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  strcpy(pMeta->tableFname, mndShowStr(pShow->type));
+
+  return 0;
+}
+
+static int32_t mndRetrieveDnodes(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode    *pMnode = pMsg->pMnode;
+  SSdb      *pSdb = pMnode->pSdb;
+  int32_t    numOfRows = 0;
+  int32_t    cols = 0;
+  SDnodeObj *pDnode = NULL;
+  char      *pWrite;
+
+  while (numOfRows < rows) {
+    pShow->pIter = sdbFetch(pSdb, SDB_DNODE, pShow->pIter, (void **)&pDnode);
+    if (pShow->pIter == NULL) break;
+
+    cols = 0;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int16_t *)pWrite = pDnode->id;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, pDnode->ep, pShow->bytes[cols]);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int16_t *)pWrite = pDnode->numOfVnodes;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int16_t *)pWrite = pDnode->numOfCores;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    const char *status = dnodeStatus[pDnode->status];
+    STR_TO_VARSTR(pWrite, status);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int64_t *)pWrite = pDnode->createdTime;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_TO_VARSTR(pWrite, offlineReason[pDnode->offlineReason]);
+    cols++;
+
+    numOfRows++;
+    sdbRelease(pSdb, pDnode);
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+  return numOfRows;
+}
+
+static void mndCancelGetNextDnode(SMnode *pMnode, void *pIter) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbCancelFetch(pSdb, pIter);
+}
\ No newline at end of file

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

@@ -20,7 +20,6 @@ static SShowObj *mndCreateShowObj(SMnode *pMnode, SShowMsg *pMsg);
 static void      mndFreeShowObj(SShowObj *pShow);
 static SShowObj *mndAcquireShowObj(SMnode *pMnode, int32_t showId);
 static void      mndReleaseShowObj(SShowObj *pShow, bool forceRemove);
-static char     *mndShowStr(int32_t showType);
 static int32_t   mndProcessShowMsg(SMnodeMsg *pMnodeMsg);
 static int32_t   mndProcessRetrieveMsg(SMnodeMsg *pMsg);
 static bool      mndCheckRetrieveFinished(SShowObj *pShow);
@@ -88,10 +87,6 @@ static void mndFreeShowObj(SShowObj *pShow) {
 
   ShowFreeIterFp freeFp = pMgmt->freeIterFps[pShow->type];
   if (freeFp != NULL) {
-    if (pShow->pVgIter != NULL) {
-      // only used in 'show vnodes "ep"'
-      (*freeFp)(pMnode, pShow->pVgIter);
-    }
     if (pShow->pIter != NULL) {
       (*freeFp)(pMnode, pShow->pIter);
     }
@@ -259,7 +254,7 @@ static int32_t mndProcessRetrieveMsg(SMnodeMsg *pMnodeMsg) {
   return TSDB_CODE_SUCCESS;
 }
 
-static char *mndShowStr(int32_t showType) {
+char *mndShowStr(int32_t showType) {
   switch (showType) {
     case TSDB_MGMT_TABLE_ACCT:
       return "show accounts";

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

@@ -277,7 +277,7 @@ static int32_t mndUpdateUser(SMnode *pMnode, SUserObj *pOldUser, SUserObj *pNewU
   return 0;
 }
 
-static int32_t mndDropUser(SMnode *pMnode, SUserObj *pUser, SMnodeMsg *pMsg) {
+static int32_t mndDropUser(SMnode *pMnode, SMnodeMsg *pMsg, SUserObj *pUser) {
   STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
   if (pTrans == NULL) {
     mError("user:%s, failed to drop since %s", pUser->user, terrstr());
@@ -437,7 +437,7 @@ static int32_t mndProcessDropUserMsg(SMnodeMsg *pMsg) {
     return -1;
   }
 
-  int32_t code = mndDropUser(pMnode, pUser, pMsg);
+  int32_t code = mndDropUser(pMnode, pMsg, pUser);
   sdbRelease(pMnode->pSdb, pOperUser);
 
   if (code != 0) {
@@ -489,7 +489,8 @@ static int32_t mndGetUserMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *p
 
   pShow->numOfRows = sdbGetSize(pSdb, SDB_USER);
   pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
-  strcpy(pMeta->tableFname, "show users");
+  strcpy(pMeta->tableFname, mndShowStr(pShow->type));
+
   return 0;
 }
 

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

@@ -14,8 +14,114 @@
  */
 
 #define _DEFAULT_SOURCE
-#include "os.h"
-#include "mndInt.h"
+#include "mndVgroup.h"
+#include "mndDnode.h"
+#include "mndShow.h"
+#include "mndTrans.h"
+#include "ttime.h"
 
-int32_t mndInitVgroup(SMnode *pMnode) { return 0; }
-void    mndCleanupVgroup(SMnode *pMnode) {}
+static char *syncRole[] = {"unsynced", "slave", "master"};
+
\ No newline at end of file
+static int32_t mndGetVnodeMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t mndRetrieveVnodes(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void    mndCancelGetNextVnode(SMnode *pMnode, void *pIter);
+
+int32_t mndInitVgroup(SMnode *pMnode) {
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_VNODES, mndGetVnodeMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_VNODES, mndRetrieveVnodes);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_VNODES, mndCancelGetNextVnode);
+
+  return 0;
+}
+
+void mndCleanupVgroup(SMnode *pMnode) {}
+
+int32_t mndGetVnodesNum(SMnode *pMnode, int32_t dnodeId) {
+  if (dnodeId == 0) {
+    return 0;
+  }
+
+  return 0;
+}
+
+static int32_t mndGetVnodeMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->schema;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "vgId");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 12 + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "status");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  int32_t dnodeId = 0;
+  if (pShow->payloadLen > 0) {
+    dnodeId = atoi(pShow->payload);
+  }
+
+  pShow->replica = dnodeId;
+  pShow->numOfRows = mndGetVnodesNum(pMnode, dnodeId);
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  strcpy(pMeta->tableFname, mndShowStr(pShow->type));
+
+  return 0;
+}
+
+static int32_t mndRetrieveVnodes(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+  int32_t numOfRows = 0;
+  SVgObj *pVgroup = NULL;
+  char   *pWrite;
+  int32_t cols = 0;
+  int32_t dnodeId = pShow->replica;
+
+  while (numOfRows < rows) {
+    pShow->pIter = sdbFetch(pSdb, SDB_VGROUP, pShow->pIter, (void **)&pVgroup);
+    if (pShow->pIter == NULL) break;
+
+    for (int32_t i = 0; i < pVgroup->numOfVnodes && numOfRows < rows; ++i) {
+      SVnodeGid *pVgid = &pVgroup->vnodeGid[i];
+      if (pVgid->dnodeId != dnodeId) continue;
+
+      cols = 0;
+
+      pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+      *(uint32_t *)pWrite = pVgroup->vgId;
+      cols++;
+
+      pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+      STR_TO_VARSTR(pWrite, syncRole[pVgid->role]);
+      cols++;
+      numOfRows++;
+    }
+
+    sdbRelease(pSdb, pVgroup);
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+  return numOfRows;
+}
+
+static void mndCancelGetNextVnode(SMnode *pMnode, void *pIter) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbCancelFetch(pSdb, pIter);
+}
\ No newline at end of file

source/util/src/tutil.c

@@ -187,7 +187,7 @@ char *strnchr(char *haystack, char needle, int32_t len, bool skipquote) {
 }
 
 char* strtolower(char *dst, const char *src) {
-  int esc = 0;
+  int32_t esc = 0;
   char quote = 0, *p = dst, c;
 
   assert(dst != NULL);
@@ -214,7 +214,7 @@ char* strtolower(char *dst, const char *src) {
 }
 
 char* strntolower(char *dst, const char *src, int32_t n) {
-  int esc = 0;
+  int32_t esc = 0;
   char quote = 0, *p = dst, c;
 
   assert(dst != NULL);
@@ -347,7 +347,7 @@ char *strbetween(char *string, char *begin, char *end) {
   char *_begin = strstr(string, begin);
   if (_begin != NULL) {
     char *_end = strstr(_begin + strlen(begin), end);
-    int   size = (int)(_end - _begin);
+    int32_t   size = (int32_t)(_end - _begin);
     if (_end != NULL && size > 0) {
       result = (char *)calloc(1, size);
       memcpy(result, _begin + strlen(begin), size - +strlen(begin));
@@ -402,7 +402,7 @@ int32_t taosHexStrToByteArray(char hexstr[], char bytes[]) {
 
 char *taosIpStr(uint32_t ipInt) {
   static char ipStrArray[3][30];
-  static int ipStrIndex = 0;
+  static int32_t ipStrIndex = 0;
 
   char *ipStr = ipStrArray[(ipStrIndex++) % 3];
   //sprintf(ipStr, "0x%x:%u.%u.%u.%u", ipInt, ipInt & 0xFF, (ipInt >> 8) & 0xFF, (ipInt >> 16) & 0xFF, (uint8_t)(ipInt >> 24));
@@ -416,4 +416,17 @@ void taosIp2String(uint32_t ip, char *str) {
 
 void taosIpPort2String(uint32_t ip, uint16_t port, char *str) {
   sprintf(str, "%u.%u.%u.%u:%u", ip & 0xFF, (ip >> 8) & 0xFF, (ip >> 16) & 0xFF, (uint8_t)(ip >> 24), port);
+}
+
+int32_t taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port) {
+  *port = 0;
+  strcpy(fqdn, ep);
+
+  char *temp = strchr(fqdn, ':');
+  if (temp) {
+    *temp = 0;
+    *port = atoi(temp + 1);
+  }
+
+  return 0;
 }
\ No newline at end of file