如何在原始副本集和新副本集之间复制数据
如何在原始副本集和新副本集之间复制数据
提问于 2022-05-24 08:56:28
我在原来的主机(k8s集群1)上安装了mongodb副本集，在新主机(k8s集群2)上刚刚安装了一个新的mongodb副本集。
我的目标是将数据从原始主机复制到新主机，这样我就可以关闭旧主机.
有一个博客，我试图跟踪这一点，但我有一些麻烦。(参考：https://mschmitt.org/blog/mongodb-migration-replicaset/)
original_host：aadfad22ca65e4ff09de37179f961d5b-.us-east-2.elb.amazonaws.com:27017
ab775d626d81742478af2744923e2ec6-.us-east-2.elb.amazonaws.com:27017：new_host
尝试
- I试图用
rs.stepDown({force:true})取代的新主机。但是它失败了.
rs.stepDown({force:true})
{
"ok" : 0,
"errmsg" : "No electable secondaries caught up as of 2022-05-24T08:50:24.809+00:00. Please use the replSetStepDown command with the argument {force: true} to force node to step down.",
"code" : 262,
"codeName" : "ExceededTimeLimit",
"$clusterTime" : {
"clusterTime" : Timestamp(1653382215, 1),
"signature" : {
"hash" : BinData(0,"qugjVF4xVS8+MNYlCgkK+0/Jt1o="),
"keyId" : NumberLong("7100922576402120709")
}
},
"operationTime" : Timestamp(1653382211, 1)
}我尝试使用replica set IDs do not match将new_host作为rs成员添加到原始rs中，但是它在rs.add( { host: "ab775d626d81742478af2744923e2ec6-<redacted>.us-east-2.elb.amazonaws.com:27017", priority: 0, votes: 0 } )中失败了
{
"_id" : 2,
"name" : "ab775d626d81742478af2744923e2ec6-<redacted>.us-east-2.elb.amazonaws.com: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"),
"lastAppliedWallTime" : ISODate("1970-01-01T00:00:00Z"),
"lastDurableWallTime" : ISODate("1970-01-01T00:00:00Z"),
"lastHeartbeat" : ISODate("2022-05-24T08:52:21.889Z"),
"lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "replica set IDs do not match, ours: 628c90e7c07f5017faff8b75; remote node's: 628b8b76ab0cdc7f9158b23b",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : -1,
"configTerm" : -1
}原始复制集配置
rs0:PRIMARY> rs.status()
{
"set" : "rs0",
"date" : ISODate("2022-05-24T08:45:48.912Z"),
"myState" : 1,
"term" : NumberLong(2),
"syncSourceHost" : "",
"syncSourceId" : -1,
"heartbeatIntervalMillis" : NumberLong(2000),
"majorityVoteCount" : 2,
"writeMajorityCount" : 1,
"votingMembersCount" : 2,
"writableVotingMembersCount" : 1,
"optimes" : {
"lastCommittedOpTime" : {
"ts" : Timestamp(1653381945, 1),
"t" : NumberLong(2)
},
"lastCommittedWallTime" : ISODate("2022-05-24T08:45:45.660Z"),
"readConcernMajorityOpTime" : {
"ts" : Timestamp(1653381945, 1),
"t" : NumberLong(2)
},
"appliedOpTime" : {
"ts" : Timestamp(1653381945, 1),
"t" : NumberLong(2)
},
"durableOpTime" : {
"ts" : Timestamp(1653381945, 1),
"t" : NumberLong(2)
},
"lastAppliedWallTime" : ISODate("2022-05-24T08:45:45.660Z"),
"lastDurableWallTime" : ISODate("2022-05-24T08:45:45.660Z")
},
"lastStableRecoveryTimestamp" : Timestamp(1653381945, 1),
"electionCandidateMetrics" : {
"lastElectionReason" : "electionTimeout",
"lastElectionDate" : ISODate("2022-05-24T08:01:45.606Z"),
"electionTerm" : NumberLong(2),
"lastCommittedOpTimeAtElection" : {
"ts" : Timestamp(0, 0),
"t" : NumberLong(-1)
},
"lastSeenOpTimeAtElection" : {
"ts" : Timestamp(1653379303, 15),
"t" : NumberLong(1)
},
"numVotesNeeded" : 1,
"priorityAtElection" : 5,
"electionTimeoutMillis" : NumberLong(10000),
"newTermStartDate" : ISODate("2022-05-24T08:01:45.609Z"),
"wMajorityWriteAvailabilityDate" : ISODate("2022-05-24T08:01:45.611Z")
},
"members" : [
{
"_id" : 0,
"name" : "aadfad22ca65e4ff09de37179f961d5b-<redacted>.us-east-2.elb.amazonaws.com:27017",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 2644,
"optime" : {
"ts" : Timestamp(1653381945, 1),
"t" : NumberLong(2)
},
"optimeDate" : ISODate("2022-05-24T08:45:45Z"),
"lastAppliedWallTime" : ISODate("2022-05-24T08:45:45.660Z"),
"lastDurableWallTime" : ISODate("2022-05-24T08:45:45.660Z"),
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"electionTime" : Timestamp(1653379305, 1),
"electionDate" : ISODate("2022-05-24T08:01:45Z"),
"configVersion" : 7,
"configTerm" : 2,
"self" : true,
"lastHeartbeatMessage" : ""
},
{
"_id" : 1,
"name" : "mongodb-staging-arbiter-0.mongodb-staging-arbiter-headless.staging.svc.cluster.local:27017",
"health" : 1,
"state" : 7,
"stateStr" : "ARBITER",
"uptime" : 2627,
"lastHeartbeat" : ISODate("2022-05-24T08:45:47.161Z"),
"lastHeartbeatRecv" : ISODate("2022-05-24T08:45:47.763Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : 7,
"configTerm" : 2
},
{
"_id" : 2,
"name" : "ab775d626d81742478af2744923e2ec6-<redacted>.us-east-2.elb.amazonaws.com: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"),
"lastAppliedWallTime" : ISODate("1970-01-01T00:00:00Z"),
"lastDurableWallTime" : ISODate("1970-01-01T00:00:00Z"),
"lastHeartbeat" : ISODate("2022-05-24T08:45:47.280Z"),
"lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "replica set IDs do not match, ours: 628c90e7c07f5017faff8b75; remote node's: 628b8b76ab0cdc7f9158b23b",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : -1,
"configTerm" : -1
}
],
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp(1653381945, 1),
"signature" : {
"hash" : BinData(0,"1GVq5OEAV3YzQmhPHuzQPVwC7+c="),
"keyId" : NumberLong("7101210034268274693")
}
},
"operationTime" : Timestamp(1653381945, 1)
}新复制集配置
{
"set" : "rs0",
"date" : ISODate("2022-05-24T08:45:52.621Z"),
"myState" : 1,
"term" : NumberLong(6),
"syncSourceHost" : "",
"syncSourceId" : -1,
"heartbeatIntervalMillis" : NumberLong(2000),
"majorityVoteCount" : 2,
"writeMajorityCount" : 1,
"votingMembersCount" : 2,
"writableVotingMembersCount" : 1,
"optimes" : {
"lastCommittedOpTime" : {
"ts" : Timestamp(1653381951, 1),
"t" : NumberLong(6)
},
"lastCommittedWallTime" : ISODate("2022-05-24T08:45:51.410Z"),
"readConcernMajorityOpTime" : {
"ts" : Timestamp(1653381951, 1),
"t" : NumberLong(6)
},
"appliedOpTime" : {
"ts" : Timestamp(1653381951, 1),
"t" : NumberLong(6)
},
"durableOpTime" : {
"ts" : Timestamp(1653381951, 1),
"t" : NumberLong(6)
},
"lastAppliedWallTime" : ISODate("2022-05-24T08:45:51.410Z"),
"lastDurableWallTime" : ISODate("2022-05-24T08:45:51.410Z")
},
"lastStableRecoveryTimestamp" : Timestamp(1653381921, 1),
"electionCandidateMetrics" : {
"lastElectionReason" : "electionTimeout",
"lastElectionDate" : ISODate("2022-05-24T08:42:31.402Z"),
"electionTerm" : NumberLong(6),
"lastCommittedOpTimeAtElection" : {
"ts" : Timestamp(0, 0),
"t" : NumberLong(-1)
},
"lastSeenOpTimeAtElection" : {
"ts" : Timestamp(1653381732, 1),
"t" : NumberLong(5)
},
"numVotesNeeded" : 1,
"priorityAtElection" : 5,
"electionTimeoutMillis" : NumberLong(10000),
"newTermStartDate" : ISODate("2022-05-24T08:42:31.405Z"),
"wMajorityWriteAvailabilityDate" : ISODate("2022-05-24T08:42:31.407Z")
},
"members" : [
{
"_id" : 0,
"name" : "ab775d626d81742478af2744923e2ec6-<redacted>.us-east-2.elb.amazonaws.com:27017",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 204,
"optime" : {
"ts" : Timestamp(1653381951, 1),
"t" : NumberLong(6)
},
"optimeDate" : ISODate("2022-05-24T08:45:51Z"),
"lastAppliedWallTime" : ISODate("2022-05-24T08:45:51.410Z"),
"lastDurableWallTime" : ISODate("2022-05-24T08:45:51.410Z"),
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"electionTime" : Timestamp(1653381751, 1),
"electionDate" : ISODate("2022-05-24T08:42:31Z"),
"configVersion" : 4,
"configTerm" : 6,
"self" : true,
"lastHeartbeatMessage" : ""
},
{
"_id" : 1,
"name" : "mongodb-prod-arbiter-0.mongodb-prod-arbiter-headless.mongodb.svc.cluster.local:27017",
"health" : 1,
"state" : 7,
"stateStr" : "ARBITER",
"uptime" : 187,
"lastHeartbeat" : ISODate("2022-05-24T08:45:50.898Z"),
"lastHeartbeatRecv" : ISODate("2022-05-24T08:45:52.493Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : 4,
"configTerm" : 6
}
],
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp(1653381951, 1),
"signature" : {
"hash" : BinData(0,"XYfuUbFoIwFfLZx3FqPOAD+CU44="),
"keyId" : NumberLong("7100922576402120709")
}
},
"operationTime" : Timestamp(1653381951, 1)
}回答 1
Stack Overflow用户
发布于 2022-05-24 09:29:52
删除来自新主机的所有数据，即停止mongod，删除dbPath中的所有文件，然后重新启动。
然后简单地添加新主机作为新成员，即一旦添加了rs.add("ab775d626d81742478af2744923e2ec6-.us-east-2.elb.amazonaws.com:27017")，就会运行初始同步。检查同步与rs.status()，这可能需要一些时间。
当新成员处于状态时，SECONDARY和rs.printSecondaryReplicationInfo()显示
rs.printSecondaryReplicationInfo()
source: "aadfad22ca65e4ff09de37179f961d5b-<redacted>.us-east-2.elb.amazonaws.com:27017"
syncedTo: Tue May 24 2022 11:23:23 GMT+0200 (CEST)
0 secs (0 hrs) behind the primary (1-2秒)在主服务器后面也是正常的)，那么您可以使用rs.remove('aadfad22ca65e4ff09de37179f961d5b-.us-east-2.elb.amazonaws.com:27017')从副本集中删除旧主机。
最后，您可以停止在旧主机上的单神，并从那里移除一切。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/72359976
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