mongoshell 执行JavaScript文件获取数据库实例基本信息

由于MongoDB没有关系型数据中强大的数据字典。因此，如果需要汇总统计一些内部信息，包括数据量，基本元信息，集群架构，状态信息。则需要自己写脚本统计。为日后工作方便，本人在此将一些统计信息通过JavaScript汇总。。使用方式如下：

脚本如下：（还有很多信息待收集统计，先走出第一步）

// 查看mongodb实例信息。

var maxSizeDb = 5;     // 看前多少数据库。默认为5
var maxSizeTable = 10; // 前五数据库中表排名前多少。 默认为10.

function byteToGb(num){
    return (num/1024/1024/1024).toFixed(2);
};

function byteToMb(num){
    return (num/1024).toFixed(0);
};

function statsDbSize(){

    var dbArray={};

    // 获取数据库信息
    dbInfo=db.adminCommand('listDatabases');

    // 获取主机信息
    hostinfo = db.hostInfo();

    dbNameSizeArray = dbInfo.databases;
    dbDiskSize = db.getSiblingDB(dbNameSizeArray[0].name);

    dbDiskSizeTotal = dbDiskSize.stats().fsTotalSize;

    print("=======服务器信息=================");
    print("CPU核数:", hostinfo.system.numCores);
    print("内存Size:(MB)", byteToMb(hostinfo.system.memSizeMB));
    print("磁盘空间:",byteToGb(dbDiskSizeTotal),"GB");
    print("系统版本:",hostinfo.os.name);
    print("内核版本:",hostinfo.os.version);
    print("最大文件打开数:",hostinfo.extra.maxOpenFiles);
    print("是否启用numa:",hostinfo.system.numaEnabled);

    print("==================================\n")

    print("=======实例概览=======")
    print("磁盘空间:",byteToGb(dbDiskSizeTotal),"GB",'\t||');
    print("数据总大小:",byteToGb(dbInfo.totalSize),"GB",'\t||');
    print("数据库个数:",dbNameSizeArray.length,'\t\t||');
    print("===========================\n")

    // 获取副本集信息
    //
    rsinfo = db.adminCommand({replSetGetStatus:1});
//    printjson(rsinfo);

    rsname = rsinfo.set;
    print("=======副本集信息=======");
    print("副本集:",rsname);

    rsOptimesLastCommittedOpTimeTs = rsinfo.optimes.lastCommittedOpTime.ts
    rsOptimesReadConcernMajorityOpTimeTs = rsinfo.optimes.readConcernMajorityOpTime.ts
    rsOptimesAppliedOpTimeTs = rsinfo.optimes.appliedOpTime.ts
    rsOptimesDurableOpTimeTs = rsinfo.optimes.durableOpTime.ts
    rslastStableCheckpointTimestamp = rsinfo.lastStableCheckpointTimestamp;
//    print("最後提交時間:",  (Date(rsOptimesLastCommittedOpTimeTs.toLocaleString())).toISOString())
    print("最後提交時間:",  Date(rsOptimesLastCommittedOpTimeTs.toLocaleString()))
    print("一致性读時間:",  Date(rsOptimesReadConcernMajorityOpTimeTs.toLocaleString()))
    print("日志应用時間:",  Date(rsOptimesAppliedOpTimeTs.toLocaleString()))
    print("日志持久時間:",  Date(rsOptimesDurableOpTimeTs.toLocaleString()))
    print("  检查点時間:",  Date(rslastStableCheckpointTimestamp.toLocaleString()))
    print("==========成员=====================")

// 打印MongoDB副本集成员信息
    rsinfoMember = rsinfo.members
    //print("===========================================================================================")
    print('ip:port \t\t health \t state \t optime \t syncSourceHost \t 成员角色');
    for(var mem in rsinfoMember){
        rsinfoMemberInfo = rsinfoMember[mem];
        print('---------------------------------------------------------------------------------------------------------')
        if(rsinfoMemberInfo.syncSourceHost == ""){

            delimiterChar = '\t\t\t';
        }
        else{
            delimiterChar = '\t';
        }
        if(rsinfoMemberInfo.optime == null){
        print(rsinfoMemberInfo.name,'\t' ,rsinfoMemberInfo.health,'\t\t', rsinfoMemberInfo.state,'\t', "None", delimiterChar,rsinfoMemberInfo.syncSourceHost, '\t\t', rsinfoMemberInfo.stateStr);}
        else{
        print(rsinfoMemberInfo.name,'\t' ,rsinfoMemberInfo.health,'\t\t', rsinfoMemberInfo.state,'\t', rsinfoMemberInfo.optime.ts.getTime(), delimiterChar,rsinfoMemberInfo.syncSourceHost, '\t', rsinfoMemberInfo.stateStr);}
    }

// 获取副本集配置信息
    rsconf = db.adminCommand( { replSetGetConfig: 1 } );

    rsconfConfig = rsconf.config;

    // 成员設置
    rsconfConfigMember = rsconfConfig.members;
    // 全局設置
    rsconfConfigSettings = rsconfConfig.settings;
    rsconfprotocolVersion = rsconfConfig.protocolVersion;
    rsconfwriteConcernMajorityJournalDefault = rsconfConfig.writeConcernMajorityJournalDefault;
    rsconfConfigSettingschainingAllowed = rsconfConfigSettings.chainingAllowed;
    rsconfConfigSettingsheartbeatIntervalMillis = rsconfConfigSettings.heartbeatIntervalMillis;
    rsconfConfigSettingsheartbeatTimeoutSecs = rsconfConfigSettings.heartbeatTimeoutSecs;
    rsconfConfigSettingselectionTimeoutMillis = rsconfConfigSettings.electionTimeoutMillis;

    print(" 协议版本( 影响):", rsconfprotocolVersion);
    print("      默认写策略:", rsconfwriteConcernMajorityJournalDefault);
    print("是否允许链式复制:", rsconfConfigSettingschainingAllowed);
    print("心跳检测间隔时间:", rsconfConfigSettingsheartbeatIntervalMillis);
    print("心跳检测超时时间:", rsconfConfigSettingsheartbeatTimeoutSecs);
    print("    选举超时时间:", rsconfConfigSettingselectionTimeoutMillis);

    print("ip:port,\t\t arbiterOnly, \t buildIndexes, \t影藏节点, \t权重,\t 标签, \t 延时同步,\t 投票节点");
    for(var i in rsconfConfigMember){
        print('------------------------------------------------------------------------------------------------------')
        var rsmember = rsconfConfigMember[i];
        if(rsmember.tags = {}){

            rsmember.tags = 'None';
        }
        print(rsmember.host, '\t',rsmember.arbiterOnly,'\t\t', rsmember.buildIndexes,'\t\t', rsmember.hidden,'\t\t', rsmember.priority, '\t',rsmember.tags,'\t', rsmember.slaveDelay,'\t', rsmember.votes)    

    }

//    printjson(rsconfConfigMember);
//    printjson(rsconfConfigSettings);
//    print("===========================\n")
//

    for(var i=0; i<dbNameSizeArray.length; i++){
        dbname = dbNameSizeArray[i].name;
        dbvalue = byteToGb(dbNameSizeArray[i].sizeOnDisk);
        dbArray[dbname] = dbvalue;

    }

// 将时间戳转换成时间
//

    //printjson(dbArray);
// order by dbsize ,Get the top five(maxSizeDb) database names in the occupied space
    var items = Object.keys(dbArray).map(function(key){ return [key, dbArray[key]];});
    var sdbArray = items.sort(function(first, second){return  second[1] - first[1]});
//    maxSizeDbName = sdbArray.slice(0, maxSizeDb);
    print("=========Overview Database=========")
    print("库名","\t\t大小:GB\t\t||")
    for(var i in sdbArray){
        //print(sdbArray[i][0],'\t\t',sdbArray[i][1],'\t\t');
        printjson(sdbArray[i],"||")

    }

    print("===========================\n")

// 可以在这个里面加上前十大的集合
    for(var j in sdbArray.slice(0, maxSizeDb)){
        db1 = db.getSiblingDB(sdbArray[j][0]);
//        printjson(db1.stats())
        db2 = db.getSiblingDB(db1);
        tableName = db2.getCollectionNames();
//        print("集合\t","\t,大小\t行数")
        for(var i in tableName){
            tn = tableName[i];
//            print(db1+'.'+tn);
        }
    }

}

statsDbSize()