MongoDB 4.2副本集新增/刪除副本（一主一副一仲裁）
阿新 • • 發佈：2021-09-05
一、修改/etc/hosts
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172.16.254.131mongo1
172.16.254.132mongo2
172.16.254.133mongo3
172.16.254.134mongo4
|
二、新增副本
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)
}
|
檢視副本集資訊：
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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已經變成了primary的副本。
三、測試副本集
primary插入測試資料：
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handong1:PRIMARY>usedb3
switchedtodbdb3
handong1:PRIMARY>db.db3.inesrt({"age":"23"})
|
| 1 2 3 4 5 6 7 |
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"}
|
在副本檢視資料：
172.16.254.132
| 1 2 3 4 5 6 7 8 9 |
handong1:SECONDARY>usedb3
switchedtodbdb3
handong1: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
| 1 2 3 4 5 6 7 8 9 |
handong1:SECONDARY>usedb3
switchedtodbdb3
handong1: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"}
|
可以看到兩個副本節點資料都已經同步。
四、刪除副本
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)
}
|
檢視副本集資訊
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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)
}
|
可以看到剛才加入的副本成員mongo4已經刪除。