MongoDB 4.2副本集添加/删除副本（一主一副一仲裁）
一、修改/etc/hosts
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172.16.254.131 mongo1172.16.254.132 mongo2172.16.254.133 mongo3172.16.254.134 mongo4 |
二、添加副本
172.16.254.131
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handong1:PRIMARY> rs.add("mongo4:27017"){ "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1616077141, 1), "signature" : { "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="), "keyId" : NumberLong(0) } }, "operationTime" : Timestamp(1616077141, 1)} |
查看副本集信息：
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handong1:PRIMARY> rs.status(){ "set" : "handong1", "date" : ISODate("2021-03-18T14:19:08.014Z"), "myState" : 1, "term" : NumberLong(6), "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "heartbeatIntervalMillis" : NumberLong(2000), "majorityVoteCount" : 3, "writeMajorityCount" : 3, "optimes" : { "lastCommittedOpTime" : { "ts" : Timestamp(1616077141, 1), "t" : NumberLong(6) }, "lastCommittedWallTime" : ISODate("2021-03-18T14:19:01.368Z"), "readConcernMajorityOpTime" : { "ts" : Timestamp(1616077141, 1), "t" : NumberLong(6) }, "readConcernMajorityWallTime" : ISODate("2021-03-18T14:19:01.368Z"), "appliedOpTime" : { "ts" : Timestamp(1616077141, 1), "t" : NumberLong(6) }, "durableOpTime" : { "ts" : Timestamp(1616077141, 1), "t" : NumberLong(6) }, "lastAppliedWallTime" : ISODate("2021-03-18T14:19:01.368Z"), "lastDurableWallTime" : ISODate("2021-03-18T14:19:01.368Z") }, "lastStableRecoveryTimestamp" : Timestamp(1616077095, 1), "lastStableCheckpointTimestamp" : Timestamp(1616077095, 1), "electionCandidateMetrics" : { "lastElectionReason" : "priorityTakeover", "lastElectionDate" : ISODate("2021-03-18T13:34:33.453Z"), "electionTerm" : NumberLong(6), "lastCommittedOpTimeAtElection" : { "ts" : Timestamp(1616074466, 1), "t" : NumberLong(5) }, "lastSeenOpTimeAtElection" : { "ts" : Timestamp(1616074466, 1), "t" : NumberLong(5) }, "numVotesNeeded" : 2, "priorityAtElection" : 2, "electionTimeoutMillis" : NumberLong(10000), "priorPrimaryMemberId" : 1, "numCatchUpOps" : NumberLong(0), "newTermStartDate" : ISODate("2021-03-18T13:34:33.518Z"), "wMajorityWriteAvailabilityDate" : ISODate("2021-03-18T13:34:34.476Z") }, "members" : [ { "_id" : 0, "name" : "172.16.254.131:27017", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 2690, "optime" : { "ts" : Timestamp(1616077141, 1), "t" : NumberLong(6) }, "optimeDate" : ISODate("2021-03-18T14:19:01Z"), "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "electionTime" : Timestamp(1616074473, 1), "electionDate" : ISODate("2021-03-18T13:34:33Z"), "configVersion" : 7, "self" : true, "lastHeartbeatMessage" : "" }, { "_id" : 1, "name" : "mongo2:27017", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 2686, "optime" : { "ts" : Timestamp(1616077141, 1), "t" : NumberLong(6) }, "optimeDurable" : { "ts" : Timestamp(1616077141, 1), "t" : NumberLong(6) }, "optimeDate" : ISODate("2021-03-18T14:19:01Z"), "optimeDurableDate" : ISODate("2021-03-18T14:19:01Z"), "lastHeartbeat" : ISODate("2021-03-18T14:19:07.382Z"), "lastHeartbeatRecv" : ISODate("2021-03-18T14:19:07.541Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : 7 }, { "_id" : 2, "name" : "mongo3:27017", "health" : 1, "state" : 7, "stateStr" : "ARBITER", "uptime" : 2686, "lastHeartbeat" : ISODate("2021-03-18T14:19:07.382Z"), "lastHeartbeatRecv" : ISODate("2021-03-18T14:19:07.389Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : 7 }, { "_id" : 3, "name" : "mongo4:27017", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 4, "optime" : { "ts" : Timestamp(1616077141, 1), "t" : NumberLong(6) }, "optimeDurable" : { "ts" : Timestamp(1616077141, 1), "t" : NumberLong(6) }, "optimeDate" : ISODate("2021-03-18T14:19:01Z"), "optimeDurableDate" : ISODate("2021-03-18T14:19:01Z"), "lastHeartbeat" : ISODate("2021-03-18T14:19:07.382Z"), "lastHeartbeatRecv" : ISODate("2021-03-18T14:19:07.680Z"), "pingMs" : NumberLong(1), "lastHeartbeatMessage" : "", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : 7 } ], "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1616077141, 1), "signature" : { "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="), "keyId" : NumberLong(0) } }, "operationTime" : Timestamp(1616077141, 1)} |
可以看到mongo4已经变成了primary的副本。
三、测试副本集
primary插入测试数据：
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handong1:PRIMARY> use db3switched to db db3handong1:PRIMARY> db.db3.inesrt({"age":"23"}) |
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handong1:PRIMARY> db.db3.find(){ "_id" : ObjectId("6051d08ac74d627f4b561349"), "name" : "mongodb" }{ "_id" : ObjectId("6053225bdebdeda2639f026e"), "name" : "mongodb4.2" }{ "_id" : ObjectId("60533d88504b2400d4ae3091"), "name" : "jianghe" }{ "_id" : ObjectId("60534e662b429cdfe156324a"), "name" : "dandan" }{ "_id" : ObjectId("605359a1ab6994b3520da444"), "name" : "doudou" }{ "_id" : ObjectId("605368ffab6994b3520da445"), "age" : "23" } |
在副本查看数据：
172.16.254.132
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handong1:SECONDARY> use db3switched to db db3handong1:SECONDARY> db.db3.find(){ "_id" : ObjectId("6051d08ac74d627f4b561349"), "name" : "mongodb" }{ "_id" : ObjectId("6053225bdebdeda2639f026e"), "name" : "mongodb4.2" }{ "_id" : ObjectId("60533d88504b2400d4ae3091"), "name" : "jianghe" }{ "_id" : ObjectId("60534e662b429cdfe156324a"), "name" : "dandan" }{ "_id" : ObjectId("605359a1ab6994b3520da444"), "name" : "doudou" }{ "_id" : ObjectId("605368ffab6994b3520da445"), "age" : "23" } |
172.16.254.134
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handong1:SECONDARY> use db3switched to db db3handong1:SECONDARY> db.db3.find(){ "_id" : ObjectId("6051d08ac74d627f4b561349"), "name" : "mongodb" }{ "_id" : ObjectId("6053225bdebdeda2639f026e"), "name" : "mongodb4.2" }{ "_id" : ObjectId("60533d88504b2400d4ae3091"), "name" : "jianghe" }{ "_id" : ObjectId("605359a1ab6994b3520da444"), "name" : "doudou" }{ "_id" : ObjectId("60534e662b429cdfe156324a"), "name" : "dandan" }{ "_id" : ObjectId("605368ffab6994b3520da445"), "age" : "23" } |
可以看到两个副本节点数据都已经同步。
四、删除副本
primary
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handong1:PRIMARY> rs.remove("mongo4:27017"){ "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1616079484, 1), "signature" : { "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="), "keyId" : NumberLong(0) } }, "operationTime" : Timestamp(1616079484, 1)} |
查看副本集信息
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handong1:PRIMARY> rs.status(){ "set" : "handong1", "date" : ISODate("2021-03-18T14:58:45.070Z"), "myState" : 1, "term" : NumberLong(6), "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "heartbeatIntervalMillis" : NumberLong(2000), "majorityVoteCount" : 2, "writeMajorityCount" : 2, "optimes" : { "lastCommittedOpTime" : { "ts" : Timestamp(1616079517, 1), "t" : NumberLong(6) }, "lastCommittedWallTime" : ISODate("2021-03-18T14:58:37.438Z"), "readConcernMajorityOpTime" : { "ts" : Timestamp(1616079517, 1), "t" : NumberLong(6) }, "readConcernMajorityWallTime" : ISODate("2021-03-18T14:58:37.438Z"), "appliedOpTime" : { "ts" : Timestamp(1616079517, 1), "t" : NumberLong(6) }, "durableOpTime" : { "ts" : Timestamp(1616079517, 1), "t" : NumberLong(6) }, "lastAppliedWallTime" : ISODate("2021-03-18T14:58:37.438Z"), "lastDurableWallTime" : ISODate("2021-03-18T14:58:37.438Z") }, "lastStableRecoveryTimestamp" : Timestamp(1616079507, 1), "lastStableCheckpointTimestamp" : Timestamp(1616079507, 1), "electionCandidateMetrics" : { "lastElectionReason" : "priorityTakeover", "lastElectionDate" : ISODate("2021-03-18T13:34:33.453Z"), "electionTerm" : NumberLong(6), "lastCommittedOpTimeAtElection" : { "ts" : Timestamp(1616074466, 1), "t" : NumberLong(5) }, "lastSeenOpTimeAtElection" : { "ts" : Timestamp(1616074466, 1), "t" : NumberLong(5) }, "numVotesNeeded" : 2, "priorityAtElection" : 2, "electionTimeoutMillis" : NumberLong(10000), "priorPrimaryMemberId" : 1, "numCatchUpOps" : NumberLong(0), "newTermStartDate" : ISODate("2021-03-18T13:34:33.518Z"), "wMajorityWriteAvailabilityDate" : ISODate("2021-03-18T13:34:34.476Z") }, "members" : [ { "_id" : 0, "name" : "172.16.254.131:27017", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 5067, "optime" : { "ts" : Timestamp(1616079517, 1), "t" : NumberLong(6) }, "optimeDate" : ISODate("2021-03-18T14:58:37Z"), "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "electionTime" : Timestamp(1616074473, 1), "electionDate" : ISODate("2021-03-18T13:34:33Z"), "configVersion" : 8, "self" : true, "lastHeartbeatMessage" : "" }, { "_id" : 1, "name" : "mongo2:27017", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 5063, "optime" : { "ts" : Timestamp(1616079517, 1), "t" : NumberLong(6) }, "optimeDurable" : { "ts" : Timestamp(1616079517, 1), "t" : NumberLong(6) }, "optimeDate" : ISODate("2021-03-18T14:58:37Z"), "optimeDurableDate" : ISODate("2021-03-18T14:58:37Z"), "lastHeartbeat" : ISODate("2021-03-18T14:58:44.264Z"), "lastHeartbeatRecv" : ISODate("2021-03-18T14:58:44.595Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "172.16.254.131:27017", "syncSourceHost" : "172.16.254.131:27017", "syncSourceId" : 0, "infoMessage" : "", "configVersion" : 8 }, { "_id" : 2, "name" : "mongo3:27017", "health" : 1, "state" : 7, "stateStr" : "ARBITER", "uptime" : 5063, "lastHeartbeat" : ISODate("2021-03-18T14:58:44.266Z"), "lastHeartbeatRecv" : ISODate("2021-03-18T14:58:44.263Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : 8 } ], "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1616079517, 1), "signature" : { "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="), "keyId" : NumberLong(0) } }, "operationTime" : Timestamp(1616079517, 1)} |
可以看到刚才加入的副本成员mongo4已经删除。
原文：https://www.cnblogs.com/chenguopa/p/15228713.html