配置mongoDB复制集群集
配置环境
27017主节点
27018 标准节点
27019被动节点
27020 仲裁节点
一、配置复制集
1）在配置复制集的时候需要先将mongoDB原本的数据清空：
进入mongoDB数据存储文件中删除数据：（注意所有的实例都需要清空） [root@kgc6 ~]# cd /var/lib/mongo [root@kgc6 mongo]# rm -rf ./* 2）创建多个实例复制27017配置文件并改名：（需要几个实例就复制几个实例）
[root@kgc6 ~]# cp /etc/mongod.conf /etc/mongod1.conf //(所有的实例配置文件都要改) 修改配置文件中的内容： path: /var/log/mongodb/mongod1.log （改为你对应的复制的配置文件名称） dbPath: /var/lib/mongo1 pidFilePath: /var/run/mongodb/mongod1.pid port: 27018 //修改端口号 replication: oplogSizeMB: 2048(开启复制集，前面要格两个空格) replSetName: kgcrs （复制集的名称） 3）创建数据文件日志文件可以自动生成：（所有的实例都需要创建）
[root@kgc6 ~]# mkdir -p /var/lib/mongo1 
4）启动mongoDB服务：
[root@kgc6 lib]# cd /usr/bin/ [root@kgc6 bin]# mongod -f /etc/mongod.conf （所有的实例都需要开） 查看端口号： [root@kgc6 bin]# netstat -lnt Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 127.0.0.1:27017 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:27018 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:27019 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:27020 0.0.0.0:* LISTEN 5）初始化配置复制集：
[root@kgc6 bin]# mongo //登录默认的mongodb数据库
> show dbs //查看全部表 2020-07-08T17:57:23.652+0800 E QUERY [thread1] Error: listDatabases failed:{ "ok" : 0, "errmsg" : "not master and slaveOk=false", "code" : 13435, "codeName" : "NotMasterNoSlaveOk" } : _getErrorWithCode@src/mongo/shell/utils.js:25:13 Mongo.prototype.getDBs@src/mongo/shell/mongo.js:62:1 shellHelper.show@src/mongo/shell/utils.js:814:19 shellHelper@src/mongo/shell/utils.js:704:15 @(shellhelp2):1:1 //（这里报错是正常情况因为我们还没有配置复制集） > rs.status() //（查看复制集） { "info" : "run rs.initiate(...) if not yet done for the set", "ok" : 0, "errmsg" : "no replset config has been received", "code" : 94, "codeName" : "NotYetInitialized" >config={"_id":"kgcrs","members":[{"_id":0,"host":"127.0.0.1:27017","priority":100},{"_id":1,"host":"127.0.0.1:27018","priority":100},{"_id":2,"host":"127.0.0.1:27019","priority":0},{"_id":3,"host":"127.0.0.1:27020","arbiterOnly":true}]} //初始化数据库并配置优先级 { "_id" : "kgcrs", "members" : [ { "_id" : 0, "host" : "127.0.0.1:27017", "priority" : 100 }, { "_id" : 1, "host" : "127.0.0.1:27018", "priority" : 100 }, { "_id" : 2, "host" : "127.0.0.1:27019", "priority" : 0 }, { "_id" : 3, "host" : "127.0.0.1:27020", "arbiterOnly" : true } ] } > rs.initiate(config) //初始化数据库 { "ok" : 1 } 查看复制集状态： > rs.status() { "info" : "run rs.initiate(...) if not yet done for the set", "ok" : 0, "errmsg" : "no replset config has been received", "code" : 94, "codeName" : "NotYetInitialized" } > config={"_id":"kgcrs","members":[{"_id":0,"host":"127.0.0.1:27017","priority":100},{"_id":1,"host":"127.0.0.1:27018","priority":100},{"_id":2,"host":"127.0.0.1:27019","priority":0},{"_id":3,"host":"127.0.0.1:27020","arbiterOnly":true}]} { "_id" : "kgcrs", "members" : [ { "_id" : 0, "host" : "127.0.0.1:27017", "priority" : 100 }, { "_id" : 1, "host" : "127.0.0.1:27018", "priority" : 100 }, { "_id" : 2, "host" : "127.0.0.1:27019", "priority" : 0 }, { "_id" : 3, "host" : "127.0.0.1:27020", "arbiterOnly" : true } ] } > rs.initiate(config) { "ok" : 1 } kgcrs:SECONDARY> rs.status() { "set" : "kgcrs", "date" : ISODate("2020-07-08T02:23:13.981Z"), "myState" : 1, "term" : NumberLong(1), "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "heartbeatIntervalMillis" : NumberLong(2000), "optimes" : { "lastCommittedOpTime" : { "ts" : Timestamp(1594174989, 1), "t" : NumberLong(1) }, "appliedOpTime" : { "ts" : Timestamp(1594174989, 1), "t" : NumberLong(1) }, "durableOpTime" : { "ts" : Timestamp(1594174989, 1), "t" : NumberLong(1) } }, "members" : [ { "_id" : 0, "name" : "127.0.0.1:27017", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", //主节点 "uptime" : 148, "optime" : { "ts" : Timestamp(1594174989, 1), "t" : NumberLong(1) }, "optimeDate" : ISODate("2020-07-08T02:23:09Z"), "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "could not find member to sync from", "electionTime" : Timestamp(1594174918, 1), "electionDate" : ISODate("2020-07-08T02:21:58Z"), "configVersion" : 1, "self" : true, "lastHeartbeatMessage" : "" }, { "_id" : 1, "name" : "127.0.0.1:27018", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", //被节点 "uptime" : 86, "optime" : { "ts" : Timestamp(1594174989, 1), "t" : NumberLong(1) }, "optimeDurable" : { "ts" : Timestamp(1594174989, 1), "t" : NumberLong(1) }, "optimeDate" : ISODate("2020-07-08T02:23:09Z"), "optimeDurableDate" : ISODate("2020-07-08T02:23:09Z"), "lastHeartbeat" : ISODate("2020-07-08T02:23:12.583Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T02:23:13.770Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "127.0.0.1:27017", "syncSourceHost" : "127.0.0.1:27017", "syncSourceId" : 0, "infoMessage" : "", "configVersion" : 1 }, { "_id" : 2, "name" : "127.0.0.1:27019", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", //被节点 "uptime" : 86, "optime" : { "ts" : Timestamp(1594174989, 1), "t" : NumberLong(1) }, "optimeDurable" : { "ts" : Timestamp(1594174989, 1), "t" : NumberLong(1) }, "optimeDate" : ISODate("2020-07-08T02:23:09Z"), "optimeDurableDate" : ISODate("2020-07-08T02:23:09Z"), "lastHeartbeat" : ISODate("2020-07-08T02:23:12.583Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T02:23:13.832Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "127.0.0.1:27017", "syncSourceHost" : "127.0.0.1:27017", "syncSourceId" : 0, "infoMessage" : "", "configVersion" : 1 }, { "_id" : 3, "name" : "127.0.0.1:27020", "health" : 1, "state" : 7, "stateStr" : "ARBITER", //仲裁节点 "uptime" : 86, "lastHeartbeat" : ISODate("2020-07-08T02:23:12.583Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T02:23:09.455Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : 1 } ], "ok" : 1 } kgcrs:PRIMARY> 6）增加和删除节点：
kgcrs:PRIMARY> rs.add("127.0.0.1:27021") 查看复制集节点： kgcrs:PRIMARY> rs.status() { "_id" : 4, "name" : "127.0.0.1:27021", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 10, "optime" : { "ts" : Timestamp(1594175705, 1), "t" : NumberLong(1) }, "optimeDurable" : { "ts" : Timestamp(1594175705, 1), "t" : NumberLong(1) }, "optimeDate" : ISODate("2020-07-08T02:35:05Z"), "optimeDurableDate" : ISODate("2020-07-08T02:35:05Z"), "lastHeartbeat" : ISODate("2020-07-08T02:35:15.243Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T02:35:15.304Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : 2 } ], "ok" : 1 } 删除复制集节点： kgcrs:PRIMARY> rs.remove("127.0.0.1:27021") { "ok" : 1 } 查看复制集节点： { "_id" : 3, "name" : "127.0.0.1:27020", "health" : 1, "state" : 7, "stateStr" : "ARBITER", "uptime" : 992, "lastHeartbeat" : ISODate("2020-07-08T02:38:18.900Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T02:38:19.919Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : 3 } ], "ok" : 1 } 7）模拟故障自动转移：
之前的主节点是127.0.0.1:27017 关闭主节点： [root@kgc6 bin]# mongod -f /etc/mongod.conf --shoutdown 登录被节点查看：（可以看到主节点自动切换到优先级为100的27018被节点上） [root@kgc6 bin]# mongo --port 27018 kgcrs:PRIMARY> rs.status() { "set" : "kgcrs", "date" : ISODate("2020-07-08T02:42:49.356Z"), "myState" : 1, "term" : NumberLong(2), "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "heartbeatIntervalMillis" : NumberLong(2000), "optimes" : { "lastCommittedOpTime" : { "ts" : Timestamp(1594176089, 1), "t" : NumberLong(1) }, "appliedOpTime" : { "ts" : Timestamp(1594176168, 1), "t" : NumberLong(2) }, "durableOpTime" : { "ts" : Timestamp(1594176168, 1), "t" : NumberLong(2) } }, "members" : [ { "_id" : 0, "name" : "127.0.0.1:27017", "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("2020-07-08T02:42:48.899Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T02:41:37.412Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "Connection refused", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : -1 }, { "_id" : 1, "name" : "127.0.0.1:27018", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 1321, "optime" : { "ts" : Timestamp(1594176168, 1), "t" : NumberLong(2) }, "optimeDate" : ISODate("2020-07-08T02:42:48Z"), "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "could not find member to sync from", "electionTime" : Timestamp(1594176106, 1), "electionDate" : ISODate("2020-07-08T02:41:46Z"), "configVersion" : 3, "self" : true, "lastHeartbeatMessage" : "" }, { "_id" : 2, "name" : "127.0.0.1:27019", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 1259, "optime" : { "ts" : Timestamp(1594176168, 1), "t" : NumberLong(2) }, "optimeDurable" : { "ts" : Timestamp(1594176168, 1), "t" : NumberLong(2) }, "optimeDate" : ISODate("2020-07-08T02:42:48Z"), "optimeDurableDate" : ISODate("2020-07-08T02:42:48Z"), "lastHeartbeat" : ISODate("2020-07-08T02:42:48.898Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T02:42:48.146Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "127.0.0.1:27018", "syncSourceHost" : "127.0.0.1:27018", "syncSourceId" : 1, "infoMessage" : "", "configVersion" : 3 }, { "_id" : 3, "name" : "127.0.0.1:27020", "health" : 1, "state" : 7, "stateStr" : "ARBITER", "uptime" : 1259, "lastHeartbeat" : ISODate("2020-07-08T02:42:48.898Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T02:42:45.207Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : 3 } ], "ok" : 1 } 8）手动进行主从切换：
启动27017端口： [root@kgc6 bin]# mongod -f /etc/mongod.conf 在27018主节点上配置： kgcrs:PRIMARY> rs.stepDown(60,30) //交出主节点位置，维持被节点不少于60秒，同时等待30秒以使主节点和被节点日志同步： kgcrs:SECONDARY> //可以看到27018节点已经变成了从节点 查看复制节点状态：（可以看到27017节点从新变成主节点） kgcrs:SECONDARY> rs.status() { "set" : "kgcrs", "date" : ISODate("2020-07-08T02:53:42.484Z"), "myState" : 2, "term" : NumberLong(3), "syncingTo" : "127.0.0.1:27019", "syncSourceHost" : "127.0.0.1:27019", "syncSourceId" : 2, "heartbeatIntervalMillis" : NumberLong(2000), "optimes" : { "lastCommittedOpTime" : { "ts" : Timestamp(1594176816, 1), "t" : NumberLong(3) }, "appliedOpTime" : { "ts" : Timestamp(1594176816, 1), "t" : NumberLong(3) }, "durableOpTime" : { "ts" : Timestamp(1594176816, 1), "t" : NumberLong(3) } }, "members" : [ { "_id" : 0, "name" : "127.0.0.1:27017", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 410, "optime" : { "ts" : Timestamp(1594176816, 1), "t" : NumberLong(3) }, "optimeDurable" : { "ts" : Timestamp(1594176816, 1), "t" : NumberLong(3) }, "optimeDate" : ISODate("2020-07-08T02:53:36Z"), "optimeDurableDate" : ISODate("2020-07-08T02:53:36Z"), "lastHeartbeat" : ISODate("2020-07-08T02:53:41.078Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T02:53:41.648Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "electionTime" : Timestamp(1594176614, 1), "electionDate" : ISODate("2020-07-08T02:50:14Z"), "configVersion" : 3 }, { "_id" : 1, "name" : "127.0.0.1:27018", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 1974, "optime" : { "ts" : Timestamp(1594176816, 1), "t" : NumberLong(3) }, "optimeDate" : ISODate("2020-07-08T02:53:36Z"), "syncingTo" : "127.0.0.1:27019", "syncSourceHost" : "127.0.0.1:27019", "syncSourceId" : 2, "infoMessage" : "", "configVersion" : 3, "self" : true, "lastHeartbeatMessage" : "" }, { "_id" : 2, "name" : "127.0.0.1:27019", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 1913, "optime" : { "ts" : Timestamp(1594176816, 1), "t" : NumberLong(3) }, "optimeDurable" : { "ts" : Timestamp(1594176816, 1), "t" : NumberLong(3) }, "optimeDate" : ISODate("2020-07-08T02:53:36Z"), "optimeDurableDate" : ISODate("2020-07-08T02:53:36Z"), "lastHeartbeat" : ISODate("2020-07-08T02:53:41.117Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T02:53:42.117Z"), "pingMs" : NumberLong(3), "lastHeartbeatMessage" : "", "syncingTo" : "127.0.0.1:27017", "syncSourceHost" : "127.0.0.1:27017", "syncSourceId" : 0, "infoMessage" : "", "configVersion" : 3 }, { "_id" : 3, "name" : "127.0.0.1:27020", "health" : 1, "state" : 7, "stateStr" : "ARBITER", "uptime" : 1913, "lastHeartbeat" : ISODate("2020-07-08T02:53:41.078Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T02:53:40.945Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : 3 } ], "ok" : 1 } 选举的原理： 节点类型分为标准（host）节点、被动（passive）节点和仲裁（arbiter）节点： （1）只有标准节点可能被选举为活跃节点（主节点）有选举权，被动节点有完整副本，不可能成为活跃节点，有选举权，仲裁节点不复制数据，不可能成为活跃节点，只有选举权。 （2）标准节点与被动节点的区别：priority值高者是标准节点，低者是被动节点 （3）选举规则是票数高者获胜，priority是优先权为0-1000的值，相当于额外增加0-1000的票数，选举结果：票数高者获胜，诺票数相同，数据新者获胜。 二、配置带认证的复制集：
创建密钥文件： [root@kgc6 lib]# vim /var/lib/testKeyFile.file 生成密钥文件： openssl rand -base64 756 > /var/lib/testKeyFile.file 修改权限： [root@kgc6 lib]# chmod 400 /var/lib/testKeyFile.file 为个个实例生成密钥文件： [root@kgc6 lib]# cp /var/lib/testKeyFile.file /var/lib/testKeyFile1.file [root@kgc6 lib]# cp /var/lib/testKeyFile.file /var/lib/testKeyFile2.file [root@kgc6 lib]# cp /var/lib/testKeyFile.file /var/lib/testKeyFile3.file 登录主节点添加权限用户： [root@kgc6 bin]# mongo 添加root用户到admin组中成为超级管理员用户密码为：123 kgcrs:PRIMARY> db.createUser({user:"root",pwd:"123",roles:["root"]}) 关闭各实例服务： [root@kgc6 bin]# mongod -f /etc/mongod.conf --shutdown killing process with pid: 4130 [root@kgc6 bin]# mongod -f /etc/mongod1.conf --shutdown killing process with pid: 3624 [root@kgc6 bin]# mongod -f /etc/mongod2.conf --shutdown killing process with pid: 3651 [root@kgc6 bin]# mongod -f /etc/mongod3.conf --shutdown killing process with pid: 3678 修改各实例的配置文件加上用户认证和密钥文件位置： [root@kgc6 bin]# vim /etc/mongod.conf 添加以下选项： security: keyFile: /var/lib/testKeyFile.file //这里是各个实例对应的密钥文件位置 authorization: enabled [root@kgc6 bin]# vim /etc/mongod1.conf security: keyFile: /var/lib/testKeyFile1.file authorization: enabled 启动各实例服务： [root@kgc6 bin]# mongod -f /etc/mongod.conf about to fork child process, waiting until server is ready for connections. forked process: 4401 child process started successfully, parent exiting [root@kgc6 bin]# mongod -f /etc/mongod1.conf about to fork child process, waiting until server is ready for connections. forked process: 4475 child process started successfully, parent exiting [root@kgc6 bin]# mongod -f /etc/mongod2.conf about to fork child process, waiting until server is ready for connections. forked process: 4552 child process started successfully, parent exiting [root@kgc6 bin]# mongod -f /etc/mongod3.conf about to fork child process, waiting until server is ready for connections. forked process: 4632 child process started successfully, parent exiting 验证群集：登录主节点服务器： [root@kgc6 bin]# mongo MongoDB shell version v3.4.24 connecting to: mongodb://127.0.0.1:27017 MongoDB server version: 3.4.24 kgcrs:PRIMARY> show dbs（查看所有数据库） 2020-07-08T11:26:46.700+0800 E QUERY [thread1] Error: listDatabases failed:{ "ok" : 0, "errmsg" : "not authorized on admin to execute command { listDatabases: 1.0 }", "code" : 13, "codeName" : "Unauthorized" } : _getErrorWithCode@src/mongo/shell/utils.js:25:13 Mongo.prototype.getDBs@src/mongo/shell/mongo.js:62:1 shellHelper.show@src/mongo/shell/utils.js:814:19 shellHelper@src/mongo/shell/utils.js:704:15 @(shellhelp2):1:1 kgcrs:PRIMARY> rs.status() (查看复制集) { "ok" : 0, "errmsg" : "not authorized on admin to execute command { replSetGetStatus: 1.0 }", "code" : 13, "codeName" : "Unauthorized" } 进入到admin库使用root用户登录： kgcrs:PRIMARY> use admin switched to db admin kgcrs:PRIMARY> db.auth("root","123") 1 kgcrs:PRIMARY> show dbs （再次查看所有数据库） admin 0.000GB local 0.000GB kgcrs:PRIMARY> rs.status() (查看复制集) { "set" : "kgcrs", "date" : ISODate("2020-07-08T03:31:03.906Z"), "myState" : 1, "term" : NumberLong(4), "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "heartbeatIntervalMillis" : NumberLong(2000), "optimes" : { "lastCommittedOpTime" : { "ts" : Timestamp(1594179053, 1), "t" : NumberLong(4) }, "appliedOpTime" : { "ts" : Timestamp(1594179053, 1), "t" : NumberLong(4) }, "durableOpTime" : { "ts" : Timestamp(1594179053, 1), "t" : NumberLong(4) } }, "members" : [ { "_id" : 0, "name" : "127.0.0.1:27017", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 322, "optime" : { "ts" : Timestamp(1594179053, 1), "t" : NumberLong(4) }, "optimeDate" : ISODate("2020-07-08T03:30:53Z"), "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "electionTime" : Timestamp(1594178752, 1), "electionDate" : ISODate("2020-07-08T03:25:52Z"), "configVersion" : 3, "self" : true, "lastHeartbeatMessage" : "" }, { "_id" : 1, "name" : "127.0.0.1:27018", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 317, "optime" : { "ts" : Timestamp(1594179053, 1), "t" : NumberLong(4) }, "optimeDurable" : { "ts" : Timestamp(1594179053, 1), "t" : NumberLong(4) }, "optimeDate" : ISODate("2020-07-08T03:30:53Z"), "optimeDurableDate" : ISODate("2020-07-08T03:30:53Z"), "lastHeartbeat" : ISODate("2020-07-08T03:31:03.653Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T03:31:03.840Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "127.0.0.1:27017", "syncSourceHost" : "127.0.0.1:27017", "syncSourceId" : 0, "infoMessage" : "", "configVersion" : 3 }, { "_id" : 2, "name" : "127.0.0.1:27019", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 312, "optime" : { "ts" : Timestamp(1594179053, 1), "t" : NumberLong(4) }, "optimeDurable" : { "ts" : Timestamp(1594179053, 1), "t" : NumberLong(4) }, "optimeDate" : ISODate("2020-07-08T03:30:53Z"), "optimeDurableDate" : ISODate("2020-07-08T03:30:53Z"), "lastHeartbeat" : ISODate("2020-07-08T03:31:03.653Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T03:31:02.668Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "127.0.0.1:27018", "syncSourceHost" : "127.0.0.1:27018", "syncSourceId" : 1, "infoMessage" : "", "configVersion" : 3 }, { "_id" : 3, "name" : "127.0.0.1:27020", "health" : 1, "state" : 7, "stateStr" : "ARBITER", "uptime" : 307, "lastHeartbeat" : ISODate("2020-07-08T03:31:03.653Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T03:31:00.092Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : 3 } ], "ok" : 1 } 登录从节点服务器： [root@kgc6 bin]# mongo --port 27018 kgcrs:SECONDARY> use admin kgcrs:SECONDARY> db.auth("root","123") 1 默认MongoDB复制集的从节点不能读取数据，可以使用rs.slaveOk()命令允许能够在从节点读取数据： kgcrs:SECONDARY> rs.slaveOk() kgcrs:SECONDARY> show dbs admin 0.000GB local 0.000GB kgcrs:SECONDARY> rs.status() { "set" : "kgcrs", "date" : ISODate("2020-07-08T03:44:43.345Z"), "myState" : 2, "term" : NumberLong(4), "syncingTo" : "127.0.0.1:27019", "syncSourceHost" : "127.0.0.1:27019", "syncSourceId" : 2, "heartbeatIntervalMillis" : NumberLong(2000), "optimes" : { "lastCommittedOpTime" : { "ts" : Timestamp(1594179874, 1), "t" : NumberLong(4) }, "appliedOpTime" : { "ts" : Timestamp(1594179874, 1), "t" : NumberLong(4) }, "durableOpTime" : { "ts" : Timestamp(1594179874, 1), "t" : NumberLong(4) } }, "members" : [ { "_id" : 0, "name" : "127.0.0.1:27017", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 207, "optime" : { "ts" : Timestamp(1594179874, 1), "t" : NumberLong(4) }, "optimeDurable" : { "ts" : Timestamp(1594179874, 1), "t" : NumberLong(4) }, "optimeDate" : ISODate("2020-07-08T03:44:34Z"), "optimeDurableDate" : ISODate("2020-07-08T03:44:34Z"), "lastHeartbeat" : ISODate("2020-07-08T03:44:43.037Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T03:44:42.458Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "electionTime" : Timestamp(1594178752, 1), "electionDate" : ISODate("2020-07-08T03:25:52Z"), "configVersion" : 3 }, { "_id" : 1, "name" : "127.0.0.1:27018", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 208, "optime" : { "ts" : Timestamp(1594179874, 1), "t" : NumberLong(4) }, "optimeDate" : ISODate("2020-07-08T03:44:34Z"), "syncingTo" : "127.0.0.1:27019", "syncSourceHost" : "127.0.0.1:27019", "syncSourceId" : 2, "infoMessage" : "", "configVersion" : 3, "self" : true, "lastHeartbeatMessage" : "" }, { "_id" : 2, "name" : "127.0.0.1:27019", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 207, "optime" : { "ts" : Timestamp(1594179874, 1), "t" : NumberLong(4) }, "optimeDurable" : { "ts" : Timestamp(1594179874, 1), "t" : NumberLong(4) }, "optimeDate" : ISODate("2020-07-08T03:44:34Z"), "optimeDurableDate" : ISODate("2020-07-08T03:44:34Z"), "lastHeartbeat" : ISODate("2020-07-08T03:44:43.037Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T03:44:42.381Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "127.0.0.1:27017", "syncSourceHost" : "127.0.0.1:27017", "syncSourceId" : 0, "infoMessage" : "", "configVersion" : 3 }, { "_id" : 3, "name" : "127.0.0.1:27020", "health" : 1, "state" : 7, "stateStr" : "ARBITER", "uptime" : 207, "lastHeartbeat" : ISODate("2020-07-08T03:44:43.037Z"), "lastHeartbeatRecv" : ISODate("2020-07-08T03:44:41.023Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : 3 } ], "ok" : 1 } 需要了解更多数据库技术:荐 配置mongoDB复制集群集，都可以关注数据库技术分享栏目—计算机技术网(www.ctvol.com)!
本文来自网络收集，不代表计算机技术网立场，如涉及侵权请联系管理员删除。
ctvol管理联系方式QQ:251552304
本文章地址：https://www.ctvol.com/dtteaching/818159.html