291 lines
9.3 KiB
C
291 lines
9.3 KiB
C
/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define _DEFAULT_SOURCE
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#include "dmInt.h"
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static void dmPrintDnodes(SDnodeMgmt *pMgmt);
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static bool dmIsEpChanged(SDnodeMgmt *pMgmt, int32_t dnodeId, const char *ep);
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static void dmResetDnodes(SDnodeMgmt *pMgmt, SArray *dnodeEps);
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int32_t dmReadFile(SDnodeMgmt *pMgmt) {
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int32_t code = TSDB_CODE_NODE_PARSE_FILE_ERROR;
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int32_t len = 0;
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int32_t maxLen = 256 * 1024;
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char *content = taosMemoryCalloc(1, maxLen + 1);
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cJSON *root = NULL;
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char file[PATH_MAX];
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TdFilePtr pFile = NULL;
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SDnode *pDnode = pMgmt->pDnode;
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pMgmt->dnodeEps = taosArrayInit(1, sizeof(SDnodeEp));
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if (pMgmt->dnodeEps == NULL) {
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dError("failed to calloc dnodeEp array since %s", strerror(errno));
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goto PRASE_DNODE_OVER;
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}
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snprintf(file, sizeof(file), "%s%sdnode.json", pMgmt->path, TD_DIRSEP);
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pFile = taosOpenFile(file, TD_FILE_READ);
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if (pFile == NULL) {
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dDebug("file %s not exist", file);
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code = 0;
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goto PRASE_DNODE_OVER;
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}
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len = (int32_t)taosReadFile(pFile, content, maxLen);
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if (len <= 0) {
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dError("failed to read %s since content is null", file);
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goto PRASE_DNODE_OVER;
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}
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content[len] = 0;
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root = cJSON_Parse(content);
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if (root == NULL) {
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dError("failed to read %s since invalid json format", file);
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goto PRASE_DNODE_OVER;
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}
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cJSON *dnodeId = cJSON_GetObjectItem(root, "dnodeId");
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if (!dnodeId || dnodeId->type != cJSON_Number) {
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dError("failed to read %s since dnodeId not found", file);
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goto PRASE_DNODE_OVER;
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}
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pDnode->dnodeId = dnodeId->valueint;
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cJSON *clusterId = cJSON_GetObjectItem(root, "clusterId");
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if (!clusterId || clusterId->type != cJSON_String) {
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dError("failed to read %s since clusterId not found", file);
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goto PRASE_DNODE_OVER;
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}
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pDnode->clusterId = atoll(clusterId->valuestring);
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cJSON *dropped = cJSON_GetObjectItem(root, "dropped");
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if (!dropped || dropped->type != cJSON_Number) {
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dError("failed to read %s since dropped not found", file);
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goto PRASE_DNODE_OVER;
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}
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pDnode->dropped = dropped->valueint;
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cJSON *dnodes = cJSON_GetObjectItem(root, "dnodes");
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if (!dnodes || dnodes->type != cJSON_Array) {
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dError("failed to read %s since dnodes not found", file);
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goto PRASE_DNODE_OVER;
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}
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int32_t numOfDnodes = cJSON_GetArraySize(dnodes);
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if (numOfDnodes <= 0) {
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dError("failed to read %s since numOfDnodes:%d invalid", file, numOfDnodes);
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goto PRASE_DNODE_OVER;
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}
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for (int32_t i = 0; i < numOfDnodes; ++i) {
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cJSON *node = cJSON_GetArrayItem(dnodes, i);
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if (node == NULL) break;
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SDnodeEp dnodeEp = {0};
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cJSON *did = cJSON_GetObjectItem(node, "id");
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if (!did || did->type != cJSON_Number) {
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dError("failed to read %s since dnodeId not found", file);
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goto PRASE_DNODE_OVER;
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}
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dnodeEp.id = dnodeId->valueint;
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cJSON *dnodeFqdn = cJSON_GetObjectItem(node, "fqdn");
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if (!dnodeFqdn || dnodeFqdn->type != cJSON_String || dnodeFqdn->valuestring == NULL) {
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dError("failed to read %s since dnodeFqdn not found", file);
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goto PRASE_DNODE_OVER;
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}
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tstrncpy(dnodeEp.ep.fqdn, dnodeFqdn->valuestring, TSDB_FQDN_LEN);
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cJSON *dnodePort = cJSON_GetObjectItem(node, "port");
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if (!dnodePort || dnodePort->type != cJSON_Number) {
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dError("failed to read %s since dnodePort not found", file);
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goto PRASE_DNODE_OVER;
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}
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dnodeEp.ep.port = dnodePort->valueint;
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cJSON *isMnode = cJSON_GetObjectItem(node, "isMnode");
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if (!isMnode || isMnode->type != cJSON_Number) {
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dError("failed to read %s since isMnode not found", file);
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goto PRASE_DNODE_OVER;
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}
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dnodeEp.isMnode = isMnode->valueint;
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taosArrayPush(pMgmt->dnodeEps, &dnodeEp);
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}
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code = 0;
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dDebug("succcessed to read file %s", file);
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dmPrintDnodes(pMgmt);
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PRASE_DNODE_OVER:
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if (content != NULL) taosMemoryFree(content);
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if (root != NULL) cJSON_Delete(root);
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if (pFile != NULL) taosCloseFile(&pFile);
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if (dmIsEpChanged(pMgmt, pDnode->dnodeId, pDnode->localEp)) {
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dError("localEp %s different with %s and need reconfigured", pDnode->localEp, file);
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return -1;
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}
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if (taosArrayGetSize(pMgmt->dnodeEps) == 0) {
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SDnodeEp dnodeEp = {0};
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dnodeEp.isMnode = 1;
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taosGetFqdnPortFromEp(pDnode->firstEp, &dnodeEp.ep);
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taosArrayPush(pMgmt->dnodeEps, &dnodeEp);
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}
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dmResetDnodes(pMgmt, pMgmt->dnodeEps);
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terrno = code;
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return code;
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}
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int32_t dmWriteFile(SDnodeMgmt *pMgmt) {
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SDnode *pDnode = pMgmt->pDnode;
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char file[PATH_MAX];
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snprintf(file, sizeof(file), "%s%sdnode.json.bak", pMgmt->path, TD_DIRSEP);
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TdFilePtr pFile = taosOpenFile(file, TD_FILE_CTEATE | TD_FILE_WRITE | TD_FILE_TRUNC);
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if (pFile == NULL) {
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dError("failed to write %s since %s", file, strerror(errno));
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terrno = TAOS_SYSTEM_ERROR(errno);
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return -1;
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}
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int32_t len = 0;
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int32_t maxLen = 256 * 1024;
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char *content = taosMemoryCalloc(1, maxLen + 1);
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len += snprintf(content + len, maxLen - len, "{\n");
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len += snprintf(content + len, maxLen - len, " \"dnodeId\": %d,\n", pDnode->dnodeId);
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len += snprintf(content + len, maxLen - len, " \"clusterId\": \"%" PRId64 "\",\n", pDnode->clusterId);
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len += snprintf(content + len, maxLen - len, " \"dropped\": %d,\n", pDnode->dropped);
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len += snprintf(content + len, maxLen - len, " \"dnodes\": [{\n");
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int32_t numOfEps = (int32_t)taosArrayGetSize(pMgmt->dnodeEps);
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for (int32_t i = 0; i < numOfEps; ++i) {
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SDnodeEp *pDnodeEp = taosArrayGet(pMgmt->dnodeEps, i);
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len += snprintf(content + len, maxLen - len, " \"id\": %d,\n", pDnodeEp->id);
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len += snprintf(content + len, maxLen - len, " \"fqdn\": \"%s\",\n", pDnodeEp->ep.fqdn);
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len += snprintf(content + len, maxLen - len, " \"port\": %u,\n", pDnodeEp->ep.port);
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len += snprintf(content + len, maxLen - len, " \"isMnode\": %d\n", pDnodeEp->isMnode);
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if (i < numOfEps - 1) {
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len += snprintf(content + len, maxLen - len, " },{\n");
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} else {
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len += snprintf(content + len, maxLen - len, " }]\n");
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}
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}
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len += snprintf(content + len, maxLen - len, "}\n");
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taosWriteFile(pFile, content, len);
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taosFsyncFile(pFile);
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taosCloseFile(&pFile);
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taosMemoryFree(content);
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char realfile[PATH_MAX];
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snprintf(realfile, sizeof(realfile), "%s%sdnode.json", pMgmt->path, TD_DIRSEP);
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if (taosRenameFile(file, realfile) != 0) {
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terrno = TAOS_SYSTEM_ERROR(errno);
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dError("failed to rename %s since %s", file, terrstr());
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return -1;
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}
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pMgmt->updateTime = taosGetTimestampMs();
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dDebug("successed to write %s", realfile);
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return 0;
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}
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void dmUpdateDnodeEps(SDnodeMgmt *pMgmt, SArray *dnodeEps) {
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int32_t numOfEps = taosArrayGetSize(dnodeEps);
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if (numOfEps <= 0) return;
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taosWLockLatch(&pMgmt->latch);
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int32_t numOfEpsOld = (int32_t)taosArrayGetSize(pMgmt->dnodeEps);
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if (numOfEps != numOfEpsOld) {
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dmResetDnodes(pMgmt, dnodeEps);
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dmWriteFile(pMgmt);
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} else {
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int32_t size = numOfEps * sizeof(SDnodeEp);
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if (memcmp(pMgmt->dnodeEps->pData, dnodeEps->pData, size) != 0) {
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dmResetDnodes(pMgmt, dnodeEps);
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dmWriteFile(pMgmt);
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}
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}
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taosWUnLockLatch(&pMgmt->latch);
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}
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static void dmResetDnodes(SDnodeMgmt *pMgmt, SArray *dnodeEps) {
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if (pMgmt->dnodeEps != dnodeEps) {
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SArray *tmp = pMgmt->dnodeEps;
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pMgmt->dnodeEps = taosArrayDup(dnodeEps);
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taosArrayDestroy(tmp);
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}
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pMgmt->mnodeEpSet.inUse = 0;
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pMgmt->mnodeEpSet.numOfEps = 0;
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int32_t mIndex = 0;
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int32_t numOfEps = (int32_t)taosArrayGetSize(dnodeEps);
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for (int32_t i = 0; i < numOfEps; i++) {
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SDnodeEp *pDnodeEp = taosArrayGet(dnodeEps, i);
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if (!pDnodeEp->isMnode) continue;
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if (mIndex >= TSDB_MAX_REPLICA) continue;
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pMgmt->mnodeEpSet.numOfEps++;
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pMgmt->mnodeEpSet.eps[mIndex] = pDnodeEp->ep;
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mIndex++;
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}
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for (int32_t i = 0; i < numOfEps; i++) {
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SDnodeEp *pDnodeEp = taosArrayGet(dnodeEps, i);
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taosHashPut(pMgmt->dnodeHash, &pDnodeEp->id, sizeof(int32_t), pDnodeEp, sizeof(SDnodeEp));
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}
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dmPrintDnodes(pMgmt);
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}
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static void dmPrintDnodes(SDnodeMgmt *pMgmt) {
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int32_t numOfEps = (int32_t)taosArrayGetSize(pMgmt->dnodeEps);
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dDebug("print dnode ep list, num:%d", numOfEps);
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for (int32_t i = 0; i < numOfEps; i++) {
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SDnodeEp *pEp = taosArrayGet(pMgmt->dnodeEps, i);
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dDebug("dnode:%d, fqdn:%s port:%u isMnode:%d", pEp->id, pEp->ep.fqdn, pEp->ep.port, pEp->isMnode);
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}
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}
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static bool dmIsEpChanged(SDnodeMgmt *pMgmt, int32_t dnodeId, const char *ep) {
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bool changed = false;
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taosRLockLatch(&pMgmt->latch);
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SDnodeEp *pDnodeEp = taosHashGet(pMgmt->dnodeHash, &dnodeId, sizeof(int32_t));
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if (pDnodeEp != NULL) {
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char epstr[TSDB_EP_LEN + 1];
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snprintf(epstr, TSDB_EP_LEN, "%s:%u", pDnodeEp->ep.fqdn, pDnodeEp->ep.port);
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changed = strcmp(ep, epstr) != 0;
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}
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taosRUnLockLatch(&pMgmt->latch);
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return changed;
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}
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