分类 部署案例 下的文章

1.下载MongoDB
下载网址： https://www.mongodb.com/download-center#community

[root@izm5eehstyavisa401mxslz ~]# wget -c https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-4.0.9.tgz
--2019-05-09 22:13:49-- https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-4.0.9.tgz
Resolving fastdl.mongodb.org (fastdl.mongodb.org)... 13.224.51.23, 13.224.51.108, 13.224.51.55, ...
Connecting to fastdl.mongodb.org (fastdl.mongodb.org)|13.224.51.23|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 84969698 (81M) [application/x-gzip]
Saving to: ‘mongodb-linux-x86_64-4.0.9.tgz’

100%[====================================================================================================================================

2019-05-09 22:14:04 (6.53 MB/s) - ‘mongodb-linux-x86_64-4.0.9.tgz’ saved [84969698/84969698]

[root@izm5eehstyavisa401mxslz ~]# tar zxvf mongodb-linux-x86_64-4.0.9.tgz
mongodb-linux-x86_64-4.0.9/README
mongodb-linux-x86_64-4.0.9/THIRD-PARTY-NOTICES
mongodb-linux-x86_64-4.0.9/MPL-2
mongodb-linux-x86_64-4.0.9/LICENSE-Community.txt
mongodb-linux-x86_64-4.0.9/bin/mongodump
mongodb-linux-x86_64-4.0.9/bin/mongorestore
mongodb-linux-x86_64-4.0.9/bin/mongoexport
mongodb-linux-x86_64-4.0.9/bin/mongoimport
mongodb-linux-x86_64-4.0.9/bin/mongostat
mongodb-linux-x86_64-4.0.9/bin/mongotop
mongodb-linux-x86_64-4.0.9/bin/bsondump
mongodb-linux-x86_64-4.0.9/bin/mongofiles
mongodb-linux-x86_64-4.0.9/bin/mongoreplay
mongodb-linux-x86_64-4.0.9/bin/mongod
mongodb-linux-x86_64-4.0.9/bin/mongos
mongodb-linux-x86_64-4.0.9/bin/mongo
mongodb-linux-x86_64-4.0.9/bin/install_compass
[root@izm5eehstyavisa401mxslz ~]# mv mongodb-linux-x86_64-4.0.9 /www/server/

2.添加到系统变量。

export PATH=/www/server/mongodb/bin:$PATH

3，创建日志目录。

[root@izm5eehstyavisa401mxslz ~]# mkdir -p /www/server/mongodb/log/mongod1
[root@izm5eehstyavisa401mxslz ~]# mkdir -p /www/server/mongodb/log/mongod2
[root@izm5eehstyavisa401mxslz ~]# mkdir -p /www/server/mongodb/log/mongod3

4，创建数据库目录

[root@izm5eehstyavisa401mxslz ~]# mkdir /www/server/mongodb/db1
[root@izm5eehstyavisa401mxslz ~]# mkdir /www/server/mongodb/db2
[root@izm5eehstyavisa401mxslz ~]# mkdir /www/server/mongodb/db3

5， 准备配置文件mongod1.conf如下。

systemLog:
destination: file
path: "/www/server/mongodb/log/mongod1/mongod.log"
logAppend: true
storage:
dbPath: /www/server/mongodb/db1
journal:

  enabled: true

processManagement:
fork: true
security:
authorization: disabled
net:
bindIp: 127.0.0.1,172.31.0.54
port: 27017
setParameter:
enableLocalhostAuthBypass: false
replication:
replSetName: test

6，复制mongod1.conf为mongod2.conf和mongod3.conf，并修改内容

mongod2.conf的内容

systemLog:
destination: file
path: "/www/server/mongodb/log/mongod2/mongod.log"
logAppend: true
storage:
dbPath: /www/server/mongodb/db2
journal:

  enabled: true

processManagement:
fork: true
security:
authorization: disabled
net:
bindIp: 127.0.0.1,172.31.0.54
port: 27018
setParameter:
enableLocalhostAuthBypass: false
replication:
replSetName: test

mongod3.conf的内容

systemLog:
destination: file
path: "/www/server/mongodb/log/mongod3/mongod.log"
logAppend: true
storage:
dbPath: /www/server/mongodb/db3
journal:

  enabled: true

processManagement:
fork: true
security:
authorization: disabled
net:
bindIp: 127.0.0.1,172.31.0.54
port: 27019
setParameter:
enableLocalhostAuthBypass: false
replication:
replSetName: test

7, 然后根据配置文件分别启动三个实例.

[root@izm5eehstyavisa401mxslz mongodb]# vim conf/mongod1.conf
[root@izm5eehstyavisa401mxslz mongodb]# mongod --config ./conf/mongod1.conf
about to fork child process, waiting until server is ready for connections.
forked process: 28159
child process started successfully, parent exiting
[root@izm5eehstyavisa401mxslz mongodb]# mongod --config ./conf/mongod2.conf
about to fork child process, waiting until server is ready for connections.
forked process: 28191
child process started successfully, parent exiting
[root@izm5eehstyavisa401mxslz mongodb]# mongod --config ./conf/mongod3.conf
about to fork child process, waiting until server is ready for connections.
forked process: 28221
child process started successfully, parent exiting

8,查看监听情况ls

[root@izm5eehstyavisa401mxslz mongodb]# netstat -lnpt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 172.31.0.54:27019 0.0.0.0:* LISTEN 28221/mongod
tcp 0 0 127.0.0.1:27019 0.0.0.0:* LISTEN 28221/mongod
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 14972/nginx: master
tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN 5705/pure-ftpd (SER
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1172/sshd
tcp 0 0 0.0.0.0:888 0.0.0.0:* LISTEN 14972/nginx: master
tcp 0 0 0.0.0.0:8888 0.0.0.0:* LISTEN 2477/python2
tcp 0 0 172.31.0.54:27017 0.0.0.0:* LISTEN 28159/mongod
tcp 0 0 127.0.0.1:27017 0.0.0.0:* LISTEN 28159/mongod
tcp 0 0 172.31.0.54:27018 0.0.0.0:* LISTEN 28191/mongod
tcp 0 0 127.0.0.1:27018 0.0.0.0:* LISTEN 28191/mongod
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 31064/mysqld
tcp6 0 0 :::21 :::* LISTEN 5705/pure-ftpd (SER

9，连接mondb1

[root@izm5eehstyavisa401mxslz mongodb]# mongo 172.31.0.54:27017
MongoDB shell version v4.0.9
connecting to: mongodb://172.31.0.54:27017/test?gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("08f0d5a6-e482-432d-a5a8-c897ebf7cdb2") }
MongoDB server version: 4.0.9
Welcome to the MongoDB shell.
For interactive help, type "help".
For more comprehensive documentation, see

http://docs.mongodb.org/

Questions? Try the support group

http://groups.google.com/group/mongodb-user

Server has startup warnings:
2019-05-09T22:38:24.734+0800 I STORAGE [initandlisten]
2019-05-09T22:38:24.734+0800 I STORAGE [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine
2019-05-09T22:38:24.734+0800 I STORAGE [initandlisten] ** See http://dochub.mongodb.org/core/prodnotes-filesystem
2019-05-09T22:38:25.380+0800 I CONTROL [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2019-05-09T22:38:25.380+0800 I CONTROL [initandlisten]
2019-05-09T22:38:25.380+0800 I CONTROL [initandlisten]
2019-05-09T22:38:25.380+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2019-05-09T22:38:25.380+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never'
2019-05-09T22:38:25.380+0800 I CONTROL [initandlisten]
2019-05-09T22:38:25.380+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2019-05-09T22:38:25.380+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never'
2019-05-09T22:38:25.380+0800 I CONTROL [initandlisten]
2019-05-09T22:38:25.380+0800 I CONTROL [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 15088 processes, 65535 files. Number of processes should be at least 32767.5 : 0.5 times number of files.
2019-05-09T22:38:25.380+0800 I CONTROL [initandlisten]

10，输入以下命令

cfg={

_id:'test',
members:[
    {_id:0,host:'192.168.70.128:27017'},
    {_id:1,host:'192.168.70.128:27018'},
    {_id:2,host:'192.168.70.128:27019',arbiterOnly:true}
]

}
rs.initiate(cfg)

返回表示成功。

rs.initiate(cfg)
{

"ok" : 1,
"operationTime" : Timestamp(1557413522, 1),
"$clusterTime" : {
    "clusterTime" : Timestamp(1557413522, 1),
    "signature" : {
        "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
        "keyId" : NumberLong(0)
    }
}

}

11， 执行rs.status()查看集群信息：

test:SECONDARY> rs.status()
{

"set" : "test",
"date" : ISODate("2019-05-09T14:52:29.907Z"),
"myState" : 1,
"term" : NumberLong(1),
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"heartbeatIntervalMillis" : NumberLong(2000),
"optimes" : {
    "lastCommittedOpTime" : {
        "ts" : Timestamp(1557413534, 5),
        "t" : NumberLong(1)
    },
    "readConcernMajorityOpTime" : {
        "ts" : Timestamp(1557413534, 5),
        "t" : NumberLong(1)
    },
    "appliedOpTime" : {
        "ts" : Timestamp(1557413534, 5),
        "t" : NumberLong(1)
    },
    "durableOpTime" : {
        "ts" : Timestamp(1557413534, 5),
        "t" : NumberLong(1)
    }
},
"lastStableCheckpointTimestamp" : Timestamp(1557413534, 1),
"members" : [
    {
        "_id" : 0,
        "name" : "172.31.0.54:27017",
        "health" : 1,
        "state" : 1,
        "stateStr" : "PRIMARY",
        "uptime" : 845,
        "optime" : {
            "ts" : Timestamp(1557413534, 5),
            "t" : NumberLong(1)
        },
        "optimeDate" : ISODate("2019-05-09T14:52:14Z"),
        "syncingTo" : "",
        "syncSourceHost" : "",
        "syncSourceId" : -1,
        "infoMessage" : "could not find member to sync from",
        "electionTime" : Timestamp(1557413533, 1),
        "electionDate" : ISODate("2019-05-09T14:52:13Z"),
        "configVersion" : 1,
        "self" : true,
        "lastHeartbeatMessage" : ""
    },
    {
        "_id" : 1,
        "name" : "172.31.0.54:27018",
        "health" : 1,
        "state" : 2,
        "stateStr" : "SECONDARY",
        "uptime" : 27,
        "optime" : {
            "ts" : Timestamp(1557413534, 5),
            "t" : NumberLong(1)
        },
        "optimeDurable" : {
            "ts" : Timestamp(1557413534, 5),
            "t" : NumberLong(1)
        },
        "optimeDate" : ISODate("2019-05-09T14:52:14Z"),
        "optimeDurableDate" : ISODate("2019-05-09T14:52:14Z"),
        "lastHeartbeat" : ISODate("2019-05-09T14:52:29.282Z"),
        "lastHeartbeatRecv" : ISODate("2019-05-09T14:52:29.433Z"),
        "pingMs" : NumberLong(0),
        "lastHeartbeatMessage" : "",
        "syncingTo" : "172.31.0.54:27017",
        "syncSourceHost" : "172.31.0.54:27017",
        "syncSourceId" : 0,
        "infoMessage" : "",
        "configVersion" : 1
    },
    {
        "_id" : 2,
        "name" : "172.31.0.54:27019",
        "health" : 1,
        "state" : 7,
        "stateStr" : "ARBITER",
        "uptime" : 27,
        "lastHeartbeat" : ISODate("2019-05-09T14:52:29.282Z"),
        "lastHeartbeatRecv" : ISODate("2019-05-09T14:52:28.856Z"),
        "pingMs" : NumberLong(0),
        "lastHeartbeatMessage" : "",
        "syncingTo" : "",
        "syncSourceHost" : "",
        "syncSourceId" : -1,
        "infoMessage" : "",
        "configVersion" : 1
    }
],
"ok" : 1,
"operationTime" : Timestamp(1557413534, 5),
"$clusterTime" : {
    "clusterTime" : Timestamp(1557413534, 5),
    "signature" : {
        "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
        "keyId" : NumberLong(0)
    }
}

}

可以看出1是节点，2是辅助，3是仲裁节点。

12，插入测试数据。

test:PRIMARY> use test; #创建test数据库
switched to db test
test:PRIMARY> db.testdb.insert({"test1":"testval1"}) #插入数据
WriteResult({ "nInserted" : 1 })
test:PRIMARY> db.testdb.find(); #查看数据
{ "_id" : ObjectId("5cd4420ae9c4c6bdba8bbfe9"), "test1" : "testval1" }

13，查看mongodb1的pid，然后使用kill命令杀掉。

14，杀掉之后，登录mongo2，执行rs.status()查看集群信息，并且查看是否有之前插入mongo1的信息：

test:SECONDARY> rs.status()
{

"set" : "test",
"date" : ISODate("2019-05-09T15:02:26.276Z"),
"myState" : 1,
"term" : NumberLong(3),
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"heartbeatIntervalMillis" : NumberLong(2000),
"optimes" : {
    "lastCommittedOpTime" : {
        "ts" : Timestamp(1557414124, 1),
        "t" : NumberLong(1)
    },
    "readConcernMajorityOpTime" : {
        "ts" : Timestamp(1557414124, 1),
        "t" : NumberLong(1)
    },
    "appliedOpTime" : {
        "ts" : Timestamp(1557414141, 1),
        "t" : NumberLong(3)
    },
    "durableOpTime" : {
        "ts" : Timestamp(1557414141, 1),
        "t" : NumberLong(3)
    }
},
"lastStableCheckpointTimestamp" : Timestamp(1557414124, 1),
"members" : [
    {
        "_id" : 0,
        "name" : "172.31.0.54:27017",
        "health" : 0,
        "state" : 8,
        "stateStr" : "(not reachable/healthy)",
        "uptime" : 0,
        "optime" : {
            "ts" : Timestamp(0, 0),
            "t" : NumberLong(-1)
        },
        "optimeDurable" : {
            "ts" : Timestamp(0, 0),
            "t" : NumberLong(-1)
        },
        "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
        "optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),
        "lastHeartbeat" : ISODate("2019-05-09T15:02:26.003Z"),
        "lastHeartbeatRecv" : ISODate("2019-05-09T15:02:07.282Z"),
        "pingMs" : NumberLong(0),
        "lastHeartbeatMessage" : "Error connecting to 172.31.0.54:27017 :: caused by :: Connection refused",
        "syncingTo" : "",
        "syncSourceHost" : "",
        "syncSourceId" : -1,
        "infoMessage" : "",
        "configVersion" : -1
    },
    {
        "_id" : 1,
        "name" : "172.31.0.54:27018",
        "health" : 1,
        "state" : 1,
        "stateStr" : "PRIMARY",
        "uptime" : 1410,
        "optime" : {
            "ts" : Timestamp(1557414141, 1),
            "t" : NumberLong(3)
        },
        "optimeDate" : ISODate("2019-05-09T15:02:21Z"),
        "syncingTo" : "",
        "syncSourceHost" : "",
        "syncSourceId" : -1,
        "infoMessage" : "could not find member to sync from",
        "electionTime" : Timestamp(1557414139, 1),
        "electionDate" : ISODate("2019-05-09T15:02:19Z"),
        "configVersion" : 1,
        "self" : true,
        "lastHeartbeatMessage" : ""
    },
    {
        "_id" : 2,
        "name" : "172.31.0.54:27019",
        "health" : 1,
        "state" : 7,
        "stateStr" : "ARBITER",
        "uptime" : 74,
        "lastHeartbeat" : ISODate("2019-05-09T15:02:26.002Z"),
        "lastHeartbeatRecv" : ISODate("2019-05-09T15:02:24.579Z"),
        "pingMs" : NumberLong(0),
        "lastHeartbeatMessage" : "",
        "syncingTo" : "",
        "syncSourceHost" : "",
        "syncSourceId" : -1,
        "infoMessage" : "",
        "configVersion" : 1
    }
],
"ok" : 1,
"operationTime" : Timestamp(1557414141, 1),
"$clusterTime" : {
    "clusterTime" : Timestamp(1557414141, 1),
    "signature" : {
        "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
        "keyId" : NumberLong(0)
    }
}

}

查看mongo2已经成为主节点。

test:PRIMARY> show dbs; #列出所有数据库。
admin 0.000GB
config 0.000GB
local 0.000GB
test 0.000GB
test:PRIMARY> db.testdb.find(); #查询数据库信息。
{ "_id" : ObjectId("5cd4420ae9c4c6bdba8bbfe9"), "test1" : "testval1" }

15重新启动mongo1，然后查询集群状态。

[root@izm5eehstyavisa401mxslz mongodb]# mongod --config ./conf/mongod1.conf
about to fork child process, waiting until server is ready for connections.
forked process: 28501
child process started successfully, parent exiting
[root@izm5eehstyavisa401mxslz mongodb]# mongo 172.31.0.54:27017
MongoDB shell version v4.0.9
connecting to: mongodb://172.31.0.54:27017/test?gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("97ce70e4-e3e5-41a0-97a2-1d54986eca0a") }
MongoDB server version: 4.0.9
Server has startup warnings:
2019-05-09T23:02:40.266+0800 I STORAGE [initandlisten]
2019-05-09T23:02:40.266+0800 I STORAGE [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine
2019-05-09T23:02:40.266+0800 I STORAGE [initandlisten] ** See http://dochub.mongodb.org/core/prodnotes-filesystem
2019-05-09T23:02:41.219+0800 I CONTROL [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2019-05-09T23:02:41.219+0800 I CONTROL [initandlisten]
2019-05-09T23:02:41.219+0800 I CONTROL [initandlisten]
2019-05-09T23:02:41.219+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2019-05-09T23:02:41.219+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never'
2019-05-09T23:02:41.219+0800 I CONTROL [initandlisten]
2019-05-09T23:02:41.219+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2019-05-09T23:02:41.219+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never'
2019-05-09T23:02:41.219+0800 I CONTROL [initandlisten]
2019-05-09T23:02:41.219+0800 I CONTROL [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 15088 processes, 65535 files. Number of processes should be at least 32767.5 : 0.5 times number of files.
2019-05-09T23:02:41.219+0800 I CONTROL [initandlisten]
2019-05-09T23:02:41.245+0800 I REPL [replexec-0]
2019-05-09T23:02:41.245+0800 I REPL [replexec-0] ** WARNING: This replica set uses arbiters, but readConcern:majority is enabled
2019-05-09T23:02:41.245+0800 I REPL [replexec-0] ** for this node. This is not a recommended configuration. Please see
2019-05-09T23:02:41.245+0800 I REPL [replexec-0] ** https://dochub.mongodb.org/core/psa-disable-rc-majority-4.0
2019-05-09T23:02:41.245+0800 I REPL [replexec-0]

test:PRIMARY> rs.status()
{

"set" : "test",
"date" : ISODate("2019-05-09T15:03:18.430Z"),
"myState" : 1,
"term" : NumberLong(3),
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"heartbeatIntervalMillis" : NumberLong(2000),
"optimes" : {
    "lastCommittedOpTime" : {
        "ts" : Timestamp(1557414191, 1),
        "t" : NumberLong(3)
    },
    "readConcernMajorityOpTime" : {
        "ts" : Timestamp(1557414191, 1),
        "t" : NumberLong(3)
    },
    "appliedOpTime" : {
        "ts" : Timestamp(1557414191, 1),
        "t" : NumberLong(3)
    },
    "durableOpTime" : {
        "ts" : Timestamp(1557414191, 1),
        "t" : NumberLong(3)
    }
},
"lastStableCheckpointTimestamp" : Timestamp(1557414191, 1),
"members" : [
    {
        "_id" : 0,
        "name" : "172.31.0.54:27017",
        "health" : 1,
        "state" : 2,
        "stateStr" : "SECONDARY",
        "uptime" : 36,
        "optime" : {
            "ts" : Timestamp(1557414191, 1),
            "t" : NumberLong(3)
        },
        "optimeDurable" : {
            "ts" : Timestamp(1557414191, 1),
            "t" : NumberLong(3)
        },
        "optimeDate" : ISODate("2019-05-09T15:03:11Z"),
        "optimeDurableDate" : ISODate("2019-05-09T15:03:11Z"),
        "lastHeartbeat" : ISODate("2019-05-09T15:03:18.005Z"),
        "lastHeartbeatRecv" : ISODate("2019-05-09T15:03:18.247Z"),
        "pingMs" : NumberLong(0),
        "lastHeartbeatMessage" : "",
        "syncingTo" : "172.31.0.54:27018",
        "syncSourceHost" : "172.31.0.54:27018",
        "syncSourceId" : 1,
        "infoMessage" : "",
        "configVersion" : 1
    },
    {
        "_id" : 1,
        "name" : "172.31.0.54:27018",
        "health" : 1,
        "state" : 1,
        "stateStr" : "PRIMARY",
        "uptime" : 1462,
        "optime" : {
            "ts" : Timestamp(1557414191, 1),
            "t" : NumberLong(3)
        },
        "optimeDate" : ISODate("2019-05-09T15:03:11Z"),
        "syncingTo" : "",
        "syncSourceHost" : "",
        "syncSourceId" : -1,
        "infoMessage" : "could not find member to sync from",
        "electionTime" : Timestamp(1557414139, 1),
        "electionDate" : ISODate("2019-05-09T15:02:19Z"),
        "configVersion" : 1,
        "self" : true,
        "lastHeartbeatMessage" : ""
    },
    {
        "_id" : 2,
        "name" : "172.31.0.54:27019",
        "health" : 1,
        "state" : 7,
        "stateStr" : "ARBITER",
        "uptime" : 126,
        "lastHeartbeat" : ISODate("2019-05-09T15:03:18.005Z"),
        "lastHeartbeatRecv" : ISODate("2019-05-09T15:03:16.579Z"),
        "pingMs" : NumberLong(0),
        "lastHeartbeatMessage" : "",
        "syncingTo" : "",
        "syncSourceHost" : "",
        "syncSourceId" : -1,
        "infoMessage" : "",
        "configVersion" : 1
    }
],
"ok" : 1,
"operationTime" : Timestamp(1557414191, 1),
"$clusterTime" : {
    "clusterTime" : Timestamp(1557414191, 1),
    "signature" : {
        "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
        "keyId" : NumberLong(0)
    }
}

}

mongodb1已经重新恢复到集群中，成为辅助节点。mongodb2已经提升为PRIMARY节点 ，自动提升主节点正常 至此，集群配置正常，多台机器配置相同。

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