关闭mongodb 集群

[root@hadoop1 ~]# ps -aux | grep mongodb;
root     15365  0.4  0.2 310040 42984 ?        Sl   17:46   0:05 /usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/mongod.conf
root     15500  0.0  0.1  90872 18204 pts/0    Sl+  18:01   0:00 /usr/local/mongodb/bin/mongo --host hadoop1
root     15512  0.0  0.0 112668   976 pts/1    S+   18:04   0:00 grep --color=auto mongodb
[root@hadoop1 ~]# kill 15365;
[root@hadoop1 ~]# kill 15500;

[root@hadoop1 ~]# /usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/mongod.conf 
about to fork child process, waiting until server is ready for connections.
forked process: 17129
child process started successfully, parent exiting
[root@hadoop1 ~]# /usr/local/mongodb/bin/mongo
MongoDB shell version v3.4.0
connecting to: mongodb://127.0.0.1:27017
MongoDB server version: 3.4.0
> cfg={_id:'replSet1',members:[{_id:1,host:'hadoop1:27017'},{_id:2,host:'hadoop2:27017'},{_id:3,host:'hadoop1:27017'}]}
{
	"_id" : "replSet1",
	"members" : [
		{
			"_id" : 1,
			"host" : "hadoop1:27017"
		},
		{
			"_id" : 2,
			"host" : "hadoop2:27017"
		},
		{
			"_id" : 3,
			"host" : "hadoop1:27017"
		}
	]
}
> rs.initiate(cfg);
{
	"ok" : 0,
	"errmsg" : "Attempting to initiate a replica set with name replSet1, but command line reports repl_test; rejecting",
	"code" : 93,
	"codeName" : "InvalidReplicaSetConfig"
}

https://docs.mongodb.com/manual/reference/glossary/#term-master　　

mongoThe MongoDB shell. The mongo process starts the MongoDB shell as a daemon connected to either amongod or mongos instance. The shell has a JavaScript interface. See mongo and mongo Shell Methods.mongodThe MongoDB database server. The mongod process starts the MongoDB server as a daemon. The MongoDB server manages data requests and formats and manages background operations. See mongod.

https://docs.mongodb.com/manual/replication/

【a group of MongoDB database server that maintain the same data set.】

A replica set in MongoDB is a group of mongod processes that maintain the same data set. Replica sets provide redundancy and high availability, and are the basis for all production deployments. This section introduces replication in MongoDB as well as the components and architecture of replica sets. The section also provides tutorials for common tasks related to replica sets.