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MongoDB Replica Set（docker方式）

Posted on 2022-01-18 11:58  高&玉  阅读(1199)  评论(0)  编辑  收藏  举报

1 介绍

       MongoDB Replica Set中文名为副本集，通俗地讲是集群当中包含了多份数据，保证主节点挂掉了，备节点能继续提供数据服务，提供的前提就是数据需要和主节点一致。

       Mongodb(M)表示主节点，Mongodb(S)表示备节点，Mongodb(A)表示仲裁节点（Arbiter）。主备节点存储数据，仲裁节点不存储数据。客户端同时连接主节点与备节点，不连接仲裁节点。

       默认设置下，主节点提供所有增删查改服务，备节点不提供任何服务。但是可以通过设置使备节点提供查询服务，这样就可以减少主节点的压力，当客户端进行数据查询时，请求自动转到备节点上。这个设置叫做Read Preference Modes，同时Java客户端提供了简单的配置方式，可以不必直接对数据库进行操作。

       仲裁节点是一种特殊的节点，它本身并不存储数据，主要的作用是决定哪一个备节点在主节点挂掉之后提升为主节点，所以客户端不需要连接此节点。这里虽然只有一个备节点，但是仍然需要一个仲裁节点来提升备节点级别。我开始也不相信必须要有仲裁节点，但是自己也试过没仲裁节点的话，主节点挂了备节点还是备节点，所以咱们还是需要它的。

2 部署MongoDB Replica Set

2.1 准备工作

MongoDB版本： 5.0.5

 

部署环境：

角色 默认端口 映射主机端口
Master 27017 37071
Slave1 27017 37072
Slave2 27017 37073
Arbiter1 27017 37074

 

宿主机安装MongoDB Shell（MongoDB Shell版本与数据库版本一致），后面方便管理。

 

拉取MongoDB for Docker镜像

[root]# docker pull mongo:latest

 

生成keyfile文件（后面开启认证登录时需要）

[root]# mkdir -p /etc/mongodb
[root]# openssl rand -base64 765 > /etc/mongodb/key.file
[root]# chmod 400 /etc/mongodb/key.file

2.2 部署数据节点

创建配置文件mongod.conf

[root]# vi /etc/mongodb/mongod.conf
systemLog:
  destination: file
  path: "/data/db/mongod.log"
  logAppend: true

storage:
  dbPath: /data/db
  wiredTiger:
    engineConfig:
      cacheSizeGB: 0.25

processManagement:
   fork: true

net:
  bindIpAll: true
  port: 27017

#security:
# keyFile: /data/db/key.file
# authorization: enabled

replication:
  replSetName: replicas
  oplogSizeMB: 2048

 

创建数据节点容器

[root]# docker run -d --name replica_db01 -p 37071:27017 -v /etc/mongodb/replica01.conf:/data/db/replica01.conf -v /etc/mongodb/key.file:/data/db/key.file mongo --config /data/db/replica01.conf
[root]# docker run -d --name replica_db02 -p 37072:27017 -v /etc/mongodb/replica02.conf:/data/db/replica02.conf -v /etc/mongodb/key.file:/data/db/key.file mongo --config /data/db/replica02.conf
[root]# docker run -d --name replica_db03 -p 37073:27017 -v /etc/mongodb/replica03.conf:/data/db/replica03.conf -v /etc/mongodb/key.file:/data/db/key.file mongo --config /data/db/replica03.conf

2.3 部署Arbiter节点

创建配置文件arbiter.conf

[root]# vi /etc/mongodb/arbiter.conf
systemLog:
  destination: file
  path: "/data/db/arbiter.log"
  logAppend: true

storage:
  dbPath: /data/db
  wiredTiger:
    engineConfig:
      cacheSizeGB: 0.25

processManagement:
   fork: true

net:
  bindIpAll: true
  port: 27017

#security:
# keyFile: /data/db/key.file

replication:
  replSetName: replicas
  oplogSizeMB: 2048

 

创建Arbiter节点容器

[root]# docker run -d --name replica_arbiter01 -p 37074:27017 -v /etc/mongodb/arbiter.conf:/data/db/arbiter01.conf -v /etc/mongodb/key.file:/data/db/key.file mongo --config /data/db/arbiter01.conf

2.4 创建副本集

初始化并创建副本集

> rs.initiate(
  {
    _id : "replicas",
    members: [
      { _id : 0, host : "10.150.57.13:37071" },
      { _id : 1, host : "10.150.57.13:37072" },
      { _id : 2, host : "10.150.57.13:37073" },
      { _id : 3, host : "10.150.57.13:37074", arbiterOnly:true }
    ]
  }
)

2.5 查看副本集信息

查看副本集信息

replicas:PRIMARY> rs.status()
{
	"set" : "replicas",
	"date" : ISODate("2022-01-18T02:58:22.833Z"),
	"myState" : 1,
	"term" : NumberLong(1),
	"syncSourceHost" : "",
	"syncSourceId" : -1,
	"heartbeatIntervalMillis" : NumberLong(2000),
	"majorityVoteCount" : 3,
	"writeMajorityCount" : 3,
	"votingMembersCount" : 4,
	"writableVotingMembersCount" : 3,
	"optimes" : {
		"lastCommittedOpTime" : {
			"ts" : Timestamp(1642474693, 1),
			"t" : NumberLong(1)
		},
		"lastCommittedWallTime" : ISODate("2022-01-18T02:58:13.609Z"),
		"readConcernMajorityOpTime" : {
			"ts" : Timestamp(1642474693, 1),
			"t" : NumberLong(1)
		},
		"appliedOpTime" : {
			"ts" : Timestamp(1642474693, 1),
			"t" : NumberLong(1)
		},
		"durableOpTime" : {
			"ts" : Timestamp(1642474693, 1),
			"t" : NumberLong(1)
		},
		"lastAppliedWallTime" : ISODate("2022-01-18T02:58:13.609Z"),
		"lastDurableWallTime" : ISODate("2022-01-18T02:58:13.609Z")
	},
	"lastStableRecoveryTimestamp" : Timestamp(1642474663, 1),
	"electionCandidateMetrics" : {
		"lastElectionReason" : "electionTimeout",
		"lastElectionDate" : ISODate("2022-01-18T02:56:03.593Z"),
		"electionTerm" : NumberLong(1),
		"lastCommittedOpTimeAtElection" : {
			"ts" : Timestamp(1642474552, 1),
			"t" : NumberLong(-1)
		},
		"lastSeenOpTimeAtElection" : {
			"ts" : Timestamp(1642474552, 1),
			"t" : NumberLong(-1)
		},
		"numVotesNeeded" : 3,
		"priorityAtElection" : 1,
		"electionTimeoutMillis" : NumberLong(10000),
		"numCatchUpOps" : NumberLong(0),
		"newTermStartDate" : ISODate("2022-01-18T02:56:03.603Z"),
		"wMajorityWriteAvailabilityDate" : ISODate("2022-01-18T02:56:04.258Z")
	},
	"members" : [
		{
			"_id" : 0,
			"name" : "10.150.57.13:37071",
			"health" : 1,
			"state" : 1,
			"stateStr" : "PRIMARY",
			"uptime" : 39455,
			"optime" : {
				"ts" : Timestamp(1642474693, 1),
				"t" : NumberLong(1)
			},
			"optimeDate" : ISODate("2022-01-18T02:58:13Z"),
			"lastAppliedWallTime" : ISODate("2022-01-18T02:58:13.609Z"),
			"lastDurableWallTime" : ISODate("2022-01-18T02:58:13.609Z"),
			"syncSourceHost" : "",
			"syncSourceId" : -1,
			"infoMessage" : "",
			"electionTime" : Timestamp(1642474563, 1),
			"electionDate" : ISODate("2022-01-18T02:56:03Z"),
			"configVersion" : 1,
			"configTerm" : 1,
			"self" : true,
			"lastHeartbeatMessage" : ""
		},
		{
			"_id" : 1,
			"name" : "10.150.57.13:37072",
			"health" : 1,
			"state" : 2,
			"stateStr" : "SECONDARY",
			"uptime" : 150,
			"optime" : {
				"ts" : Timestamp(1642474693, 1),
				"t" : NumberLong(1)
			},
			"optimeDurable" : {
				"ts" : Timestamp(1642474693, 1),
				"t" : NumberLong(1)
			},
			"optimeDate" : ISODate("2022-01-18T02:58:13Z"),
			"optimeDurableDate" : ISODate("2022-01-18T02:58:13Z"),
			"lastAppliedWallTime" : ISODate("2022-01-18T02:58:13.609Z"),
			"lastDurableWallTime" : ISODate("2022-01-18T02:58:13.609Z"),
			"lastHeartbeat" : ISODate("2022-01-18T02:58:21.596Z"),
			"lastHeartbeatRecv" : ISODate("2022-01-18T02:58:22.601Z"),
			"pingMs" : NumberLong(0),
			"lastHeartbeatMessage" : "",
			"syncSourceHost" : "10.150.57.13:37071",
			"syncSourceId" : 0,
			"infoMessage" : "",
			"configVersion" : 1,
			"configTerm" : 1
		},
		{
			"_id" : 2,
			"name" : "10.150.57.13:37073",
			"health" : 1,
			"state" : 2,
			"stateStr" : "SECONDARY",
			"uptime" : 150,
			"optime" : {
				"ts" : Timestamp(1642474693, 1),
				"t" : NumberLong(1)
			},
			"optimeDurable" : {
				"ts" : Timestamp(1642474693, 1),
				"t" : NumberLong(1)
			},
			"optimeDate" : ISODate("2022-01-18T02:58:13Z"),
			"optimeDurableDate" : ISODate("2022-01-18T02:58:13Z"),
			"lastAppliedWallTime" : ISODate("2022-01-18T02:58:13.609Z"),
			"lastDurableWallTime" : ISODate("2022-01-18T02:58:13.609Z"),
			"lastHeartbeat" : ISODate("2022-01-18T02:58:21.597Z"),
			"lastHeartbeatRecv" : ISODate("2022-01-18T02:58:22.600Z"),
			"pingMs" : NumberLong(0),
			"lastHeartbeatMessage" : "",
			"syncSourceHost" : "10.150.57.13:37071",
			"syncSourceId" : 0,
			"infoMessage" : "",
			"configVersion" : 1,
			"configTerm" : 1
		},
		{
			"_id" : 3,
			"name" : "10.150.57.13:37074",
			"health" : 1,
			"state" : 7,
			"stateStr" : "ARBITER",
			"uptime" : 150,
			"lastHeartbeat" : ISODate("2022-01-18T02:58:21.597Z"),
			"lastHeartbeatRecv" : ISODate("2022-01-18T02:58:21.600Z"),
			"pingMs" : NumberLong(0),
			"lastHeartbeatMessage" : "",
			"syncSourceHost" : "",
			"syncSourceId" : -1,
			"infoMessage" : "",
			"configVersion" : 1,
			"configTerm" : 1
		}
	],
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1642474693, 1),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	},
	"operationTime" : Timestamp(1642474693, 1)
}

 

确认哪个节点是Master

replicas:PRIMARY> rs.isMaster()
{
	"topologyVersion" : {
		"processId" : ObjectId("61e592afd305eeacf7ed8c65"),
		"counter" : NumberLong(6)
	},
	"hosts" : [
		"10.150.57.13:37071",
		"10.150.57.13:37072",
		"10.150.57.13:37073"
	],
	"arbiters" : [
		"10.150.57.13:37074"
	],
	"setName" : "replicas",
	"setVersion" : 1,
	"ismaster" : true,
	"secondary" : false,
	"primary" : "10.150.57.13:37071",
	"me" : "10.150.57.13:37071",
	"electionId" : ObjectId("7fffffff0000000000000001"),
	"lastWrite" : {
		"opTime" : {
			"ts" : Timestamp(1642474893, 1),
			"t" : NumberLong(1)
		},
		"lastWriteDate" : ISODate("2022-01-18T03:01:33Z"),
		"majorityOpTime" : {
			"ts" : Timestamp(1642474893, 1),
			"t" : NumberLong(1)
		},
		"majorityWriteDate" : ISODate("2022-01-18T03:01:33Z")
	},
	"maxBsonObjectSize" : 16777216,
	"maxMessageSizeBytes" : 48000000,
	"maxWriteBatchSize" : 100000,
	"localTime" : ISODate("2022-01-18T03:01:35.509Z"),
	"logicalSessionTimeoutMinutes" : 30,
	"connectionId" : 2,
	"minWireVersion" : 0,
	"maxWireVersion" : 13,
	"readOnly" : false,
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1642474893, 1),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	},
	"operationTime" : Timestamp(1642474893, 1)
}

 

查看副本集配置信息

replicas:PRIMARY> rs.conf()
{
	"_id" : "replicas",
	"version" : 1,
	"term" : 1,
	"members" : [
		{
			"_id" : 0,
			"host" : "10.150.57.13:37071",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 1,
			"host" : "10.150.57.13:37072",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 2,
			"host" : "10.150.57.13:37073",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 3,
			"host" : "10.150.57.13:37074",
			"arbiterOnly" : true,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 0,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		}
	],
	"protocolVersion" : NumberLong(1),
	"writeConcernMajorityJournalDefault" : true,
	"settings" : {
		"chainingAllowed" : true,
		"heartbeatIntervalMillis" : 2000,
		"heartbeatTimeoutSecs" : 10,
		"electionTimeoutMillis" : 10000,
		"catchUpTimeoutMillis" : -1,
		"catchUpTakeoverDelayMillis" : 30000,
		"getLastErrorModes" : {
			
		},
		"getLastErrorDefaults" : {
			"w" : 1,
			"wtimeout" : 0
		},
		"replicaSetId" : ObjectId("61e62c38d305eeacf7ed8f87")
	}
}

3 MongoDB Replica Set测试

3.1 数据同步测试

Master端创建测试数据

[root]# mongo --port 37071
replicas:PRIMARY> use gaoyu
switched to db gaoyu
replicas:PRIMARY> db.t1.insert( { name : "gaoyu" } )

 

Slave1端查看数据是否同步

[root]# mongo --port 37072
replicas:SECONDARY> use gaoyu
switched to db gaoyu
replicas:SECONDARY> rs.secondaryOk()	#开启Slave可读
replicas:SECONDARY> show collections
t1
replicas:SECONDARY> db.t1.find()
{ "_id" : ObjectId("61e6d385c8ca480d8b12f836"), "name" : "gaoyu" }

 

Slave2端查看数据是否同步

[root]# mongo --port 37073
replicas:SECONDARY> use gaoyu
switched to db gaoyu
replicas:SECONDARY> rs.secondaryOk()	#开启Slave可读
replicas:SECONDARY> show collections
t1
replicas:SECONDARY> db.t1.find()
{ "_id" : ObjectId("61e6d385c8ca480d8b12f836"), "name" : "gaoyu" }

3.2 测试Master自动切换

查看哪个节点是Master，当前Master是10.150.57.13:37071

replicas:SECONDARY> rs.isMaster()
{
	"topologyVersion" : {
		"processId" : ObjectId("61e593430ae02c2941c3e53f"),
		"counter" : NumberLong(6)
	},
	"hosts" : [
		"10.150.57.13:37071",
		"10.150.57.13:37072",
		"10.150.57.13:37073"
	],
	"arbiters" : [
		"10.150.57.13:37074"
	],
	"setName" : "replicas",
	"setVersion" : 3,
	"ismaster" : false,
	"secondary" : true,
	"primary" : "10.150.57.13:37071",
	"me" : "10.150.57.13:37072",
	"lastWrite" : {
		"opTime" : {
			"ts" : Timestamp(1642520214, 1),
			"t" : NumberLong(1)
		},
		"lastWriteDate" : ISODate("2022-01-18T15:36:54Z"),
		"majorityOpTime" : {
			"ts" : Timestamp(1642520214, 1),
			"t" : NumberLong(1)
		},
		"majorityWriteDate" : ISODate("2022-01-18T15:36:54Z")
	},
	"maxBsonObjectSize" : 16777216,
	"maxMessageSizeBytes" : 48000000,
	"maxWriteBatchSize" : 100000,
	"localTime" : ISODate("2022-01-18T15:37:01.467Z"),
	"logicalSessionTimeoutMinutes" : 30,
	"connectionId" : 77,
	"minWireVersion" : 0,
	"maxWireVersion" : 13,
	"readOnly" : false,
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1642520214, 1),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	},
	"operationTime" : Timestamp(1642520214, 1)
}

 

手动关闭10.150.57.13:37071所对应的docker容器

[root]# docker stop replica_db01

 

查看哪个节点是Master

replicas:SECONDARY> rs.isMaster()
{
	"topologyVersion" : {
		"processId" : ObjectId("61e593430ae02c2941c3e53f"),
		"counter" : NumberLong(7)
	},
	"hosts" : [
		"10.150.57.13:37071",
		"10.150.57.13:37072",
		"10.150.57.13:37073"
	],
	"arbiters" : [
		"10.150.57.13:37074"
	],
	"setName" : "replicas",
	"setVersion" : 3,
	"ismaster" : false,
	"secondary" : true,
	"primary" : "10.150.57.13:37073",
	"me" : "10.150.57.13:37072",
	"lastWrite" : {
		"opTime" : {
			"ts" : Timestamp(1642520464, 1),
			"t" : NumberLong(3)
		},
		"lastWriteDate" : ISODate("2022-01-18T15:41:04Z"),
		"majorityOpTime" : {
			"ts" : Timestamp(1642520394, 1),
			"t" : NumberLong(1)
		},
		"majorityWriteDate" : ISODate("2022-01-18T15:39:54Z")
	},
	"maxBsonObjectSize" : 16777216,
	"maxMessageSizeBytes" : 48000000,
	"maxWriteBatchSize" : 100000,
	"localTime" : ISODate("2022-01-18T15:41:07.337Z"),
	"logicalSessionTimeoutMinutes" : 30,
	"connectionId" : 90,
	"minWireVersion" : 0,
	"maxWireVersion" : 13,
	"readOnly" : false,
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1642520464, 1),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	},
	"operationTime" : Timestamp(1642520464, 1)
}

 

可以看到10.150.57.13:37073已经成为Master。

4 开启认证登录

4.1 创建管理员账号

连接PRIMARY创建管理员账号

[root]# mongo --port 27071
mongos> use admin
mongos> db.createUser(
   {
     user: "admin",
     pwd: "Gaoyu@029",
     roles: [ { role: "root", db: "admin" } ]
   }
   )
输出信息：
Successfully added user: {
	"user" : "admin",
	"roles" : [
		{
			"role" : "root",
			"db" : "admin"
		}
	]
}

 4.2 修改配置文件

 去掉配置文件replica01.conf、replica02.conf、replica03.conf、arbiter01.conf、arbiter02.conf、arbiter03.conf中的注释

security:
  keyFile: /data/db/key.file
  authorization: enabled

4.3 重启服务

重启replica_arbiter01、replica_arbiter02、replica_arbiter03、replica_db03、replica_db02、replica_db01

[root]# docker restart replica_arbiter01
[root]# docker restart replica_arbiter02
[root]# docker restart replica_arbiter03
[root]# docker restart replica_db01
[root]# docker restart replica_db02
[root]# docker restart replica_db03

4.4 验证

登录PRIMARY

[root]# mongo --port 37071 admin

权限认证

replicas:PRIMARY> show users
uncaught exception: Error: command usersInfo requires authentication :
_getErrorWithCode@src/mongo/shell/utils.js:25:13
DB.prototype.getUsers@src/mongo/shell/db.js:1635:15
shellHelper.show@src/mongo/shell/utils.js:933:9
shellHelper@src/mongo/shell/utils.js:838:15
@(shellhelp2):1:1
replicas:PRIMARY> db.auth('admin','Gaoyu@029')
1
replicas:PRIMARY> show users
{
	"_id" : "admin.admin",
	"userId" : UUID("12f644c7-660d-4d84-8663-893377eb1ca9"),
	"user" : "admin",
	"db" : "admin",
	"roles" : [
		{
			"role" : "root",
			"db" : "admin"
		}
	],
	"mechanisms" : [
		"SCRAM-SHA-1",
		"SCRAM-SHA-256"
	]
}

5 Replica Set增/删节点

5.1 新增Arbiter节点

创建配置文件

[root]# cp /etc/mongodb/arbiter01.conf /etc/mongodb/arbiter02.conf
[root]# cp /etc/mongodb/arbiter01.conf /etc/mongodb/arbiter03.conf
[root]# cat /etc/mongodb/arbiter03.conf
systemLog:
  destination: file
  path: "/data/db/shards.log"
  logAppend: true

storage:
  dbPath: /data/db
  wiredTiger:
    engineConfig:
      cacheSizeGB: 0.25

net:
  bindIpAll: true
  port: 27017

security:
  keyFile: /data/db/key.file

replication:
  replSetName: replicas
  oplogSizeMB: 2048

创建arbiter容器

[root]# docker run -d --name replica_arbiter02 -p 37075:27017 -v /etc/mongodb/arbiter.conf:/data/db/arbiter02.conf -v /etc/mongodb/key.file:/data/db/key.file mongo --config /data/db/arbiter02.conf
[root]# docker run -d --name replica_arbiter03 -p 37076:27017 -v /etc/mongodb/arbiter.conf:/data/db/arbiter03.conf -v /etc/mongodb/key.file:/data/db/key.file mongo --config /data/db/arbiter03.conf

新增arbiter节点（10.150.57.13:37075、10.150.57.13:37076）

> rs.addArb("10.150.57.13:37075")
{
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1642475773, 1),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	},
	"operationTime" : Timestamp(1642475773, 1)
}

> rs.addArb("10.150.57.13:37076")
{
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1642475792, 1),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	},
	"operationTime" : Timestamp(1642475792, 1)
}

查看arbiter新节点是否添加成功

replicas:PRIMARY> rs.conf()
{
	"_id" : "replicas",
	"version" : 3,
	"term" : 1,
	"members" : [
		{
			"_id" : 0,
			"host" : "10.150.57.13:37071",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 1,
			"host" : "10.150.57.13:37072",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 2,
			"host" : "10.150.57.13:37073",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 3,
			"host" : "10.150.57.13:37074",
			"arbiterOnly" : true,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 0,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 4,
			"host" : "10.150.57.13:37075",
			"arbiterOnly" : true,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 0,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 5,
			"host" : "10.150.57.13:37076",
			"arbiterOnly" : true,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 0,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		}
	],
	"protocolVersion" : NumberLong(1),
	"writeConcernMajorityJournalDefault" : true,
	"settings" : {
		"chainingAllowed" : true,
		"heartbeatIntervalMillis" : 2000,
		"heartbeatTimeoutSecs" : 10,
		"electionTimeoutMillis" : 10000,
		"catchUpTimeoutMillis" : -1,
		"catchUpTakeoverDelayMillis" : 30000,
		"getLastErrorModes" : {
			
		},
		"getLastErrorDefaults" : {
			"w" : 1,
			"wtimeout" : 0
		},
		"replicaSetId" : ObjectId("61e62c38d305eeacf7ed8f87")
	}
}

5.2 删除Arbiter节点

删除arbiter（10.150.57.13:37075、10.150.57.13:37076）

replicas:PRIMARY> rs.remove("10.150.57.13:37075")
{
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1643037995, 1),
		"signature" : {
			"hash" : BinData(0,"Upxbp5mfXMYSqvM0u3DYhmjnN5E="),
			"keyId" : NumberLong("7054374532596891652")
		}
	},
	"operationTime" : Timestamp(1643037995, 1)
}

replicas:PRIMARY> rs.remove("10.150.57.13:37076")
{
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1643038094, 1),
		"signature" : {
			"hash" : BinData(0,"PowO0jACeRMNA9V6R3t3eumq/FA="),
			"keyId" : NumberLong("7054374532596891652")
		}
	},
	"operationTime" : Timestamp(1643038094, 1)
}

查看arbiter节点是否删除成功

replicas:PRIMARY> rs.conf()
{
	"_id" : "replicas",
	"version" : 5,
	"term" : 4,
	"members" : [
		{
			"_id" : 0,
			"host" : "10.150.57.13:37071",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 1,
			"host" : "10.150.57.13:37072",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 2,
			"host" : "10.150.57.13:37073",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 3,
			"host" : "10.150.57.13:37074",
			"arbiterOnly" : true,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 0,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		}
	],
	"protocolVersion" : NumberLong(1),
	"writeConcernMajorityJournalDefault" : true,
	"settings" : {
		"chainingAllowed" : true,
		"heartbeatIntervalMillis" : 2000,
		"heartbeatTimeoutSecs" : 10,
		"electionTimeoutMillis" : 10000,
		"catchUpTimeoutMillis" : -1,
		"catchUpTakeoverDelayMillis" : 30000,
		"getLastErrorModes" : {
			
		},
		"getLastErrorDefaults" : {
			"w" : 1,
			"wtimeout" : 0
		},
		"replicaSetId" : ObjectId("61e62c38d305eeacf7ed8f87")
	}
}

 5.3 新增复制节点

修改配置文件

[root]# cp /etc/mongodb/replica03.conf /etc/mongodb/replica04.conf
[root]# cat /etc/mongodb/replica04.conf
systemLog:
  destination: file
  path: "/data/db/shards.log"
  logAppend: true

storage:
  dbPath: /data/db
  wiredTiger:
    engineConfig:
      cacheSizeGB: 0.25

net:
  bindIpAll: true

security:
  keyFile: /data/db/key.file
  authorization: enabled

replication:
  replSetName: replicas
  oplogSizeMB: 2048

 创建容器

[root]# docker run -d --name replica_db04 -p 37077:27017 -v /etc/mongodb/replica04.conf:/data/db/replica04.conf -v /etc/mongodb/key.file:/data/db/key.file mongo --config /data/db/replica04.conf

添加数据复制节点（10.150.57.13:37077）

replicas:PRIMARY> db.auth('admin','Gaoyu@029')
1
replicas:PRIMARY> rs.add("10.150.57.13:37077")
{
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1643039164, 1),
		"signature" : {
			"hash" : BinData(0,"iHAKa9dp+C8SzJsa3mkae2V6GaA="),
			"keyId" : NumberLong("7054374532596891652")
		}
	},
	"operationTime" : Timestamp(1643039164, 1)
}

 确认节点是否添加成功

replicas:PRIMARY> rs.conf()
{
	"_id" : "replicas",
	"version" : 6,
	"term" : 4,
	"members" : [
		{
			"_id" : 0,
			"host" : "10.150.57.13:37071",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 1,
			"host" : "10.150.57.13:37072",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 2,
			"host" : "10.150.57.13:37073",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 3,
			"host" : "10.150.57.13:37074",
			"arbiterOnly" : true,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 0,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 4,
			"host" : "10.150.57.13:37077",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		}
	],
	"protocolVersion" : NumberLong(1),
	"writeConcernMajorityJournalDefault" : true,
	"settings" : {
		"chainingAllowed" : true,
		"heartbeatIntervalMillis" : 2000,
		"heartbeatTimeoutSecs" : 10,
		"electionTimeoutMillis" : 10000,
		"catchUpTimeoutMillis" : -1,
		"catchUpTakeoverDelayMillis" : 30000,
		"getLastErrorModes" : {
			
		},
		"getLastErrorDefaults" : {
			"w" : 1,
			"wtimeout" : 0
		},
		"replicaSetId" : ObjectId("61e62c38d305eeacf7ed8f87")
	}
}

 5.4 删除复制节点

删除复制节点（10.150.57.13:37077）

replicas:PRIMARY> rs.remove("10.150.57.13:37077")
{
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1643039447, 1),
		"signature" : {
			"hash" : BinData(0,"dtBEDqnQnh2x2uSXkeia4EwGJhQ="),
			"keyId" : NumberLong("7054374532596891652")
		}
	},
	"operationTime" : Timestamp(1643039447, 1)
}

确认节点是否被删除

replicas:PRIMARY> rs.conf()
{
	"_id" : "replicas",
	"version" : 7,
	"term" : 4,
	"members" : [
		{
			"_id" : 0,
			"host" : "10.150.57.13:37071",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 1,
			"host" : "10.150.57.13:37072",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 2,
			"host" : "10.150.57.13:37073",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		},
		{
			"_id" : 3,
			"host" : "10.150.57.13:37074",
			"arbiterOnly" : true,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 0,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		}
	],
	"protocolVersion" : NumberLong(1),
	"writeConcernMajorityJournalDefault" : true,
	"settings" : {
		"chainingAllowed" : true,
		"heartbeatIntervalMillis" : 2000,
		"heartbeatTimeoutSecs" : 10,
		"electionTimeoutMillis" : 10000,
		"catchUpTimeoutMillis" : -1,
		"catchUpTakeoverDelayMillis" : 30000,
		"getLastErrorModes" : {
			
		},
		"getLastErrorDefaults" : {
			"w" : 1,
			"wtimeout" : 0
		},
		"replicaSetId" : ObjectId("61e62c38d305eeacf7ed8f87")
	}
}

5.5 新增延迟复制节点

新增复制节点

replicas:PRIMARY> rs.add("10.150.57.13:37077")

 查看10.150.57.13:37077节点信息

replicas:PRIMARY> rs.conf()
#截取信息
		{
			"_id" : 4,
			"host" : "10.150.57.13:37077",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(0),
			"votes" : 1
		}

 将10.150.57.13:37077变更为延迟复制节点

#定义变量
replicas:PRIMARY> cfg = rs.conf()

#修改权重
replicas:PRIMARY> cfg.members[4].priority = 0
0

#设置该节点为hidden，不参与选主
replicas:PRIMARY> cfg.members[4].hidden = true
true

#设置延迟复制的时间（因版本不同参数不一样slaveDelay/secondaryDelaySecs）
replicas:PRIMARY> cfg.members[4].secondaryDelaySecs = 3600
3600

#使变量生效
replicas:PRIMARY> rs.reconfig(cfg)
{
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1643547193, 1),
		"signature" : {
			"hash" : BinData(0,"k4y1ZNtgDmdLghtiyjZpqZdbj9E="),
			"keyId" : NumberLong("7054374532596891652")
		}
	},
	"operationTime" : Timestamp(1643547193, 1)
}

再次查看10.150.57.13:37077节点信息，可以看到修改的参数值已生效

		{
			"_id" : 4,
			"host" : "10.150.57.13:37077",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : true,
			"priority" : 0,
			"tags" : {
				
			},
			"secondaryDelaySecs" : NumberLong(3600),
			"votes" : 1
		}