To MongoDB a stand-alone computer to a replica set

single-machine switch to replica set method step

1: Back up the database, turn off the current database

/u03/mongodb/bin/mongodump-d Configuration-o/u02/dump/

Use admin db.shutdownserver ();

2: Start two data nodes on both machines as follows:

/u01/mongo/bin/mongod--dbpath=/u01/mongodb/data/--logpath=/u01/mongodb/logs/node1.log--replSet replcopy/ 192.168.191.141:27017--fork

/u01/mongo/bin/mongod--dbpath=/u01/mongodb/data/--logpath=/u01/mongodb/logs/node2.log--replSetreplcopy/ 192.168.191.151:27017--fork

The data file for the first node is the data file directory of the previous single point, guaranteeing that the data has been

3: Start the quorum node on another machine

u01/mongo/bin/mongod--dbpath=/u01/mongodb/arbiter/--port 20000--logpath=/u01/mongodb/logs/arbiter.log--replSet Replcopy/192.168.191.141:27017,192.168.191.151:27017--fork

/admin

4: Add Configuration

CFG = {_id: "Replcopy", Members: [{_id:0, Host: "192.168.191.141:27017"}, {_id:1,host: "192.168.191 .151:27,017 "}]}

Rs.initiate (CFG)

5: Add quorum node

Rs.addarb ("192.168.191.150:20000");

6: Enter the database to view the status of a few laps

The Rs.status () rs.stepdown () command can force the primary and standard node roles to be interchanged to verify that the failover function is implemented.

7: Make the repository readable (optional)

Db.getmongo (). Setslaveok ()

8: Modify the Application connection string

mongodb://192.168.191.141:27017,192.168.191.151:27017