如何使用c ++驱动程序将两个客户端IP连接到同一个mongodb

Question

我正在尝试使用mongo c ++驱动程序创建一个客户端来连接到数据库。我成功测试了localhost的客户端。我用的代码如下。

现在我希望将数据库和客户端放在不同的机器上，例如IP 10.1.2.56上的客户端和IP 10.1.2.57上的mongodb

我应该在代码中做出改变以实现这一点。我试图改变这条线

c.connect("localhost"); //"192.168.58.1");

至

 c.connect("10.1.2.57"); //"192.168.58.1");

但这不起作用错误说“捕获无法连接到服务器10.1.2.57:27017”我试图ping IP 10.1.2.57它也给了我响应。

#include <iostream>
#include "mongo/client/dbclient.h"

// g++ src/mongo/client/examples/tutorial.cpp -pthread -Isrc -Isrc/mongo -lmongoclient -lboost_thread-mt -lboost_system -lboost_filesystem -L[path to libmongoclient.a] -o tutorial
//g++ tutorial.cpp -L[mongo directory] -L/opt/local/lib -lmongoclient -lboost_thread-mt -lboost_filesystem -lboost_system -I/opt/local/include  -o tutorial

using namespace mongo;

void printIfAge(DBClientConnection& c, int age) {
    auto_ptr<DBClientCursor> cursor = c.query("tutorial.persons", QUERY( "age" << age ).sort("name") );
    while( cursor->more() ) {
        BSONObj p = cursor->next();
        cout << p.getStringField("name") << endl;
    }
}

void run() {
    DBClientConnection c;
    c.connect("localhost"); //"192.168.58.1");
    cout << "connected ok" << endl;
    BSONObj p = BSON( "name" << "Joe" << "age" << 33 );
    c.insert("tutorial.persons", p);
    p = BSON( "name" << "Jane" << "age" << 40 );
    c.insert("tutorial.persons", p);
    p = BSON( "name" << "Abe" << "age" << 33 );
    c.insert("tutorial.persons", p);
    p = BSON( "name" << "Methuselah" << "age" << BSONNULL);
    c.insert("tutorial.persons", p);
    p = BSON( "name" << "Samantha" << "age" << 21 << "city" << "Los Angeles" << "state" << "CA" );
    c.insert("tutorial.persons", p);

    c.ensureIndex("tutorial.persons", fromjson("{age:1}"));

    cout << "count:" << c.count("tutorial.persons") << endl;

    auto_ptr<DBClientCursor> cursor = c.query("tutorial.persons", BSONObj());
    while( cursor->more() ) {
        cout << cursor->next().toString() << endl;
    }

    cout << "\nprintifage:\n";
    printIfAge(c, 33);
}

int main() {
    try {
        run();
    }
    catch( DBException &e ) {
        cout << "caught " << e.what() << endl;
    }
    return 0;
}