【MongoDB】移除复制集成员
2023-03-07 09:26 abce 阅读(209) 评论(0) 编辑 收藏 举报1.使用rs.remove()
(1)关闭mongodb实例
先关闭要移除的mongodb实例
db.shutdownServer()
(2)连接到复制集的primary节点
使用db.hello()查看复制集的信息
> db.hello()
{
"topologyVersion" : {
"processId" : ObjectId("63956ad40ce6275c36c30464"),
"counter" : NumberLong(8)
},
"hosts" : [
"192.168.137.24:27017",
"192.168.137.25:27017",
"192.168.137.26:27017"
],
"passives" : [
"13.14.250.11:27017"
],
"setName" : "abce_rs",
"setVersion" : 2,
"isWritablePrimary" : true,
"secondary" : false,
"primary" : "192.168.137.26:27017",
"me" : "192.168.137.26:27017",
"electionId" : ObjectId("7fffffff0000000000000005"),
"lastWrite" : {
"opTime" : {
"ts" : Timestamp(1678089543, 8),
"t" : NumberLong(5)
},
"lastWriteDate" : ISODate("2023-03-06T07:59:03Z"),
"majorityOpTime" : {
"ts" : Timestamp(1678089543, 8),
"t" : NumberLong(5)
},
"majorityWriteDate" : ISODate("2023-03-06T07:59:03Z")
},
"maxBsonObjectSize" : 16777216,
"maxMessageSizeBytes" : 48000000,
"maxWriteBatchSize" : 100000,
"localTime" : ISODate("2023-03-06T07:59:03.595Z"),
"logicalSessionTimeoutMinutes" : 30,
"connectionId" : 1486170,
"minWireVersion" : 0,
"maxWireVersion" : 13,
"readOnly" : false,
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp(1678089543, 8),
"signature" : {
"hash" : BinData(0,"5cRWwdv97PAUESoPYgMqCgfsWYk="),
"keyId" : NumberLong("7161241075632308230")
}
},
"operationTime" : Timestamp(1678089543, 8)
}
(3)使用rs.remove()移除
rs.remove("mongod3.example.net:27017")
rs.remove("mongod3.example.net")
2.使用rs.reconfig()
也可以通过重新构建复制集来移除节点。
从4.4版本开始，rs.reconfig()支持增加或移除可投票节点，一次只能移除一个节点。
(1)先关闭要移除的mongodb实例
db.shutdownServer()
(2)连接到复制集的primary节点
使用db.hello()查看复制集的信息
> db.hello()
{
"topologyVersion" : {
"processId" : ObjectId("63956ad40ce6275c36c30464"),
"counter" : NumberLong(8)
},
"hosts" : [
"192.168.137.24:27017",
"192.168.137.25:27017",
"192.168.137.26:27017"
],
"passives" : [
"13.14.250.11:27017"
],
"setName" : "abce_rs",
"setVersion" : 2,
"isWritablePrimary" : true,
"secondary" : false,
"primary" : "192.168.137.26:27017",
"me" : "192.168.137.26:27017",
"electionId" : ObjectId("7fffffff0000000000000005"),
"lastWrite" : {
"opTime" : {
"ts" : Timestamp(1678089543, 8),
"t" : NumberLong(5)
},
"lastWriteDate" : ISODate("2023-03-06T07:59:03Z"),
"majorityOpTime" : {
"ts" : Timestamp(1678089543, 8),
"t" : NumberLong(5)
},
"majorityWriteDate" : ISODate("2023-03-06T07:59:03Z")
},
"maxBsonObjectSize" : 16777216,
"maxMessageSizeBytes" : 48000000,
"maxWriteBatchSize" : 100000,
"localTime" : ISODate("2023-03-06T07:59:03.595Z"),
"logicalSessionTimeoutMinutes" : 30,
"connectionId" : 1486170,
"minWireVersion" : 0,
"maxWireVersion" : 13,
"readOnly" : false,
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp(1678089543, 8),
"signature" : {
"hash" : BinData(0,"5cRWwdv97PAUESoPYgMqCgfsWYk="),
"keyId" : NumberLong("7161241075632308230")
}
},
"operationTime" : Timestamp(1678089543, 8)
}
(3)执行rs.conf()
> rs.conf()
{
"_id" : "abce_rs",
"version" : 2,
"term" : 5,
"members" : [
{
"_id" : 0,
"host" : "192.168.137.24:27017",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"secondaryDelaySecs" : NumberLong(0),
"votes" : 1
},
{
"_id" : 1,
"host" : "192.168.137.25:27017",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"secondaryDelaySecs" : NumberLong(0),
"votes" : 1
},
{
"_id" : 2,
"host" : "192.168.137.26:27017",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"secondaryDelaySecs" : NumberLong(0),
"votes" : 1
},
{
"_id" : 3,
"host" : "13.14.250.11:27017",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 0,
"tags" : {
},
"secondaryDelaySecs" : NumberLong(0),
"votes" : 0
}
],
"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("6361d6c6ba61e054186e592a")
}
}
(3)保存当前的配置信息
cfg = rs.conf()
(4)修改配置信息
比如移除节点(_id为2)
cfg.members.splice(2,1)
(5)使用修改后的信息重载复制集的配置
rs.reconfig(cfg)
(6)确认
rs.conf()
