Replica Sets 复制集搭建
MongoDB 有三种集群架构模式，分别为主从复制（Master-Slaver）、副本集（Replica Set）和分片（Sharding）模式。
Master-Slaver 是一种主从复制的模式，目前已经不推荐使用
ReplicaSet模式取代了Master-Slaver模式，是一种互为主从的关系。Replica Set 将数据复制多份保存，不同服务器保存同一份数据，在出现故障时自动切换，实现故障转移。
MongoDB复制集主要用于实现服务的高可用性，与Redis中的哨兵模式相似。它的核心作用是数据的备份和故障转移。
Sharding 模式适合处理大量数据，它将数据分开存储，不同服务器保存不同的数据，所有服务器数据的总和即为整个数据集。
本文档主要内容为复制集的搭建和操作
一、操作系统参数优化
1.1 关闭内存大页
echo never > /sys/kernel/mm/transparent_hugepage/enabled echo never > /sys/kernel/mm/transparent_hugepage/defrag 并追加⽌⽂件中 /etc/rc.local [root@localhost ~]# vim /etc/rc.d/rc.local 增加下列内容： if test -f /sys/kernel/mm/transparent_hugepage/enabled; then echo never > /sys/kernel/mm/transparent_hugepage/enabled fi if test -f /sys/kernel/mm/transparent_hugepage/defrag; then echo never > /sys/kernel/mm/transparent_hugepage/defrag fi 保存并退出，然后给rc.local添加可执行权限。 [root@localhost ~]# chmod +x /etc/rc.d/rc.local 最后重启。
1.2 禁用numa架构
使用普通用户启动命令之前添加 sudo -u mongo numactl --interleave=all
修改内核参数
echo 0 > /proc/sys/vm/zone_reclaim_mode echo vm.zone_reclaim_mode = 0 >> /etc/sysctl.conf
1.3 设置 vm.swappiness
临时修改
sysctl -w vm.swappiness=0 永久修改 vim /etc/sysctl.conf vm.swappiness = 0
1.4 修改打开⽂件数限制
vim /etc/security/limits.conf mongo soft nofile 65535 mongo hard nofile 65535 mongo soft nproc 65535 mongo hard nproc 65535 mongo soft stack 10240 mongo hards stack 10240
二、基础安装
2.1 一主二从副本集搭建
节点名 IP 端口 配置文件 M1 127.0.0.1 27018 /u01/mongodb/node1/conf/mongodb.conf S1 127.0.0.1 27019 /u01/mongodb/node2/conf/mongodb.conf S2 127.0.0.1 27020 /u01/mongodb/node3/conf/mongodb.conf
2.2下载安装包并解压
cd /u01 tar -zxvf mongodb-linux-x86_64-rhel70-4.4.26.tgz
移动目录
mv mongodb-linux-x86_64-rhel70-4.4.26.tgz mongodb
创建目录
mkdir key node1 cd /u01/mongodb/node1 mkdir data log conf cd /u01/mongodb cp -r node1 node2 cp -r node2 node3
创建启动账号
groupadd mongo useradd -M -g mongo mongo
生成keyfile，如果部署到不同主机，需要拷贝到其他主机上
openssl rand -base64 159 > /u01/mongodb/key/mongo_cluster.key chmod 600 /u01/mongodb/key/mongo_cluster.key
修改目录权限
chown -R mongo:mongo /u01/mongodb
三、配置文件
systemLog: destination: file path: /u01/mongodb/node1/log/mongod.log # log path logAppend: true logRotate: reopen destination: file timeStampFormat: "iso8601-local" storage: dbPath: /u01/mongodb/node1/data # data directory journal: #是否启用journal日志 enabled: true directoryPerDB: true syncPeriodSecs: 60 engine: wiredTiger #存储引擎 wiredTiger: engineConfig: cacheSizeGB: 10 journalCompressor: "snappy" directoryForIndexes: false collectionConfig: blockCompressor: "snappy" indexConfig: prefixCompression: true net: port: 27018 # port bindIpAll: true maxIncomingConnections: 50000 wireObjectCheck: true ipv6: false unixDomainSocket: enabled: true pathPrefix: "/u01/mongodb/node1/tmp" filePermissions: 0700 processManagement: fork: true pidFilePath: /u01/mongodb/node1/node1.pid security: keyFile: "/u01/mongodb/key/mongo_cluster.key" clusterAuthMode: "keyFile" authorization: "enabled" javascriptEnabled: true operationProfiling: slowOpThresholdMs: 100 mode: slowOp replication: oplogSizeMB: 20480 replSetName: "repl_cluster" enableMajorityReadConcern: false
3个节点配置文件一致，根据需要更改相应值即可
四、启动并初始化
4.1 启动3个数据节点
sudo -u mongo numactl --interleave=all mongod -f /u01/mongodb/node1/conf/mongodb.conf sudo -u mongo numactl --interleave=all mongod -f /u01/mongodb/node2/conf/mongodb.conf sudo -u mongo numactl --interleave=all mongod -f /u01/mongodb/node3/conf/mongodb.conf
4.2 初始化配置
use admin cfg={_id:"repl_cluster", members:[{_id:0,host:"localhost:27018",priority:1}, {_id:1,host:"localhost:27019"}, {_id:2,host:"localhost:27020"}] } rs.initiate(cfg);
4.3 查看复制集状态
repl_cluster:PRIMARY> rs.status() { "set" : "repl_cluster", "date" : ISODate("2024-01-05T06:35:09.080Z"), "myState" : 1, "term" : NumberLong(2), "syncSourceHost" : "", "syncSourceId" : -1, "heartbeatIntervalMillis" : NumberLong(2000), "majorityVoteCount" : 2, "writeMajorityCount" : 2, "votingMembersCount" : 3, "writableVotingMembersCount" : 3, "members" : [ { "_id" : 0, "name" : "localhost:27018", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 78682, "optime" : { "ts" : Timestamp(1704436504, 1), "t" : NumberLong(2) }, "optimeDate" : ISODate("2024-01-05T06:35:04Z"), "lastAppliedWallTime":ISODate("2024-01-05T06:35:04.073Z"), "lastDurableWallTime":ISODate("2024-0105T06:35:04.073Z"), "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "electionTime" : Timestamp(1704357871, 1), "electionDate" : ISODate("2024-01-04T08:44:31Z"), "configVersion" : 1, "configTerm" : 2, "self" : true, "lastHeartbeatMessage" : "" }, { "_id" : 1, "name" : "localhost:27019", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 78647, "optime" : { "ts" : Timestamp(1704436504, 1), "t" : NumberLong(2) }, "optimeDurable" : { "ts" : Timestamp(1704436504, 1), "t" : NumberLong(2) }, "optimeDate" : ISODate("2024-01-05T06:35:04Z"), "optimeDurableDate" : ISODate("2024-01-05T06:35:04Z"), "lastAppliedWallTime":ISODate("2024-01-05T06:35:04.073Z"), "lastDurableWallTime":ISODate("2024-0105T06:35:04.073Z"), "lastHeartbeat" : ISODate("2024-01-05T06:35:07.970Z"), "lastHeartbeatRecv" : ISODate("2024-01-05T06:35:08.967Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncSourceHost" : "localhost:27020", "syncSourceId" : 2, "infoMessage" : "", "configVersion" : 1, "configTerm" : 2 }, { "_id" : 2, "name" : "localhost:27020", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 78642, "optime" : { "ts" : Timestamp(1704436504, 1), "t" : NumberLong(2) }, "optimeDurable" : { "ts" : Timestamp(1704436504, 1), "t" : NumberLong(2) }, "optimeDate" : ISODate("2024-01-05T06:35:04Z"), "optimeDurableDate" : ISODate("2024-01-05T06:35:04Z"), "lastAppliedWallTime":ISODate("2024-01-05T06:35:04.073Z"), "lastDurableWallTime":ISODate("2024-0105T06:35:04.073Z"), "lastHeartbeat" : ISODate("2024-01-05T06:35:07.971Z"), "lastHeartbeatRecv" : ISODate("2024-01-05T06:35:08.465Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncSourceHost" : "localhost:27018", "syncSourceId" : 0, "infoMessage" : "", "configVersion" : 1, "configTerm" : 2 } ], "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1704436504, 1), "signature" : { "hash" : BinData(0,"v2qzTOmGVCC4cSO2EF38WQ3TGLM="), "keyId" : NumberLong("7319816138693541892") } }, "operationTime" : Timestamp(1704436504, 1) }
查看Replica Sets 状态
repl_cluster:PRIMARY> rs.isMaster() { "topologyVersion" : { "processId" : ObjectId("65966fc3b2be80d8248ff95e"), "counter" : NumberLong(6) }, "hosts" : [ "localhost:27018", "localhost:27019", "localhost:27020" ], "setName" : "repl_cluster", "setVersion" : 1, "ismaster" : true, "secondary" : false, "primary" : "localhost:27018", "me" : "localhost:27018", "electionId" : ObjectId("7fffffff0000000000000002"), "lastWrite" : { "opTime" : { "ts" : Timestamp(1704436574, 1), "t" : NumberLong(2) }, "lastWriteDate" : ISODate("2024-01-05T06:36:14Z"), "majorityOpTime" : { "ts" : Timestamp(1704436574, 1), "t" : NumberLong(2) }, "majorityWriteDate" : ISODate("2024-01-05T06:36:14Z") }, "maxBsonObjectSize" : 16777216, "maxMessageSizeBytes" : 48000000, "maxWriteBatchSize" : 100000, "localTime" : ISODate("2024-01-05T06:36:19.346Z"), "logicalSessionTimeoutMinutes" : 30, "connectionId" : 39, "minWireVersion" : 0, "maxWireVersion" : 9, "readOnly" : false, "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1704436574, 1), "signature" : { "hash" : BinData(0,"GIed52Qk4RdLOy9M0YmdT2z76NA="), "keyId" : NumberLong("7319816138693541892") } }, "operationTime" : Timestamp(1704436574, 1) }
4.4 创建账号并认证
db.createUser({user:"admin", pwd: "123456",roles:[{role:"root",db:"admin"}]}) db.auth("admin", "123456");
4.5 重新登录并验证
mongo --port 27018 -u admin -p
rs.status()
五、replica Set 管理
5.1 读写分离
主库插入测试数据
use test j={name:"mongo_new",age:5} i={x:3} db.test.insert(j) db.test.insert(i) db.test.save(i) db.test.save(j) db.test.find() repl_cluster:PRIMARY>use test switched to db test repl_cluster:PRIMARY> db.test.find() { "_id" : ObjectId("65962274d846bcd325533e5b"), "x" : 3 } { "_id" : ObjectId("659626a1d846bcd325533e5c"), "name" : "mongo_new", "age" : 5 }
从库进行查询操作
repl_cluster:SECONDARY> show collections uncaught exception: Error: listCollections failed: { "topologyVersion" : { "processId" : ObjectId("65966fe4c8db6c6ee7ee58fa"), "counter" : NumberLong(4) }, "operationTime" : Timestamp(1704422833, 1), "ok" : 0, "errmsg" : "not master and slaveOk=false", "code" : 13435, "codeName" : "NotPrimaryNoSecondaryOk", "$clusterTime" : { "clusterTime" : Timestamp(1704422833, 1), "signature" : { "hash" : BinData(0,"zp3Q5q7KdZpW6jlTQSwi3bbLgkA="), "keyId" : NumberLong("7319816138693541892") } } }
查询报错，从库无法执行查询操作
开启从库查询操作
repl_cluster:SECONDARY> db.getMongo().setSecondaryOk() repl_cluster:SECONDARY> show collections test repl_cluster:SECONDARY> db.test.find() { "_id" : ObjectId("65962274d846bcd325533e5b"), "x" : 3 } { "_id" : ObjectId("659626a1d846bcd325533e5c"), "name" : "mongo_new", "age" : 5 } repl_cluster:SECONDARY>
5.2 故障转移
模拟主库down机，验证故障是否自动转移
杀掉主库进程 [root@erp-db ~]# ps -ef |grep mongo | more mongo 15862 1 0 Jan04 ? 00:12:23 mongod -f /u01/mongodb/node1/conf/mongodb.conf mongo 16006 1 0 Jan04 ? 00:12:25 mongod -f /u01/mongodb/node2/conf/mongodb.conf mongo 16111 1 0 Jan04 ? 00:12:38 mongod -f /u01/mongodb/node3/conf/mongodb.conf [root@erp-db ~]# kill -9 15862
查看副本集群状态
repl_cluster:PRIMARY> rs.status() { "set" : "repl_cluster", "date" : ISODate("2024-01-05T06:45:16.062Z"), "myState" : 1, "term" : NumberLong(3), "syncSourceHost" : "", "syncSourceId" : -1, "heartbeatIntervalMillis" : NumberLong(2000), "majorityVoteCount" : 2, "writeMajorityCount" : 2, "votingMembersCount" : 3, "writableVotingMembersCount" : 3, "members" : [ { "_id" : 0, "name" : "localhost:27018", "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("2024-01-05T06:44:34.087Z"), "lastDurableWallTime":ISODate("2024-0105T06:44:34.087Z"), "lastHeartbeat" : ISODate("2024-01-05T06:45:15.756Z"), "lastHeartbeatRecv" : ISODate("2024-01-05T06:44:37.970Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "Error connecting to localhost:27018 (127.0.0.1:27018) :: caused by :: Connection refused", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : 1, "configTerm" : 2 }, { "_id" : 1, "name" : "localhost:27019", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 79256, "optime" : { "ts" : Timestamp(1704437107, 1), "t" : NumberLong(3) }, "optimeDate" : ISODate("2024-01-05T06:45:07Z"), "lastAppliedWallTime":ISODate("2024-01-05T06:45:07.750Z"), "lastDurableWallTime":ISODate("2024-0105T06:45:07.750Z"), "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "electionTime" : Timestamp(1704437087, 1), "electionDate" : ISODate("2024-01-05T06:44:47Z"), "configVersion" : 1, "configTerm" : 3, "self" : true, "lastHeartbeatMessage" : "" }, { "_id" : 2, "name" : "localhost:27020", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 79248, "optime" : { "ts" : Timestamp(1704437107, 1), "t" : NumberLong(3) }, "optimeDurable" : { "ts" : Timestamp(1704437107, 1), "t" : NumberLong(3) }, "optimeDate" : ISODate("2024-01-05T06:45:07Z"), "optimeDurableDate" : ISODate("2024-01-05T06:45:07Z"), "lastAppliedWallTime":ISODate("2024-01-05T06:45:07.750Z"), "lastDurableWallTime":ISODate("2024-0105T06:45:07.750Z"), "lastHeartbeat" : ISODate("2024-01-05T06:45:15.742Z"), "lastHeartbeatRecv" : ISODate("2024-01-05T06:45:14.249Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncSourceHost" : "localhost:27019", "syncSourceId" : 1, "infoMessage" : "", "configVersion" : 1, "configTerm" : 3 } ], "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1704437107, 1), "signature" : { "hash" : BinData(0,"Q6vILQyJe0QvnCDuZZUfS2IJafA="), "keyId" : NumberLong("7319816138693541892") } }, "operationTime" : Timestamp(1704437107, 1) }
27018端口mongodb出现异常，状态为(not reachable/healthy)",系统自动选举了27019端口为主，实现了故障的自动转移
当原主进程启动后，自动加入到集群中，角色为SECONDARY
5.3 增加节点
5.3.1 通过oplog来增加节点
1、 配置并启动新节点，启用20721作为新节点端口，配置文件根据需要更改
sudo -u mongo numactl --interleave=all mongod -f /u01/mongodb/node4/conf/mongodb.conf about to fork child process, waiting until server is ready for connections. forked process: 25698 child process started successfully, parent exiting
2、 添加新节点到现有Replica Set
repl_cluster:PRIMARY> rs.add("localhost:27021") { "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1704439046, 1), "signature" : { "hash" : BinData(0,"S8ApX1WUo83welNeMKf5jkBdj+Q="), "keyId" : NumberLong("7319816138693541892") } }, "operationTime" : Timestamp(1704439046, 1) }
3、 查看集群状态
{ "_id" : 3, "name" : "localhost:27021", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 10, "optime" : { "ts" : Timestamp(1704439046, 1), "t" : NumberLong(3) }, "optimeDurable" : { "ts" : Timestamp(1704439046, 1), "t" : NumberLong(3) }, "optimeDate" : ISODate("2024-01-05T07:17:26Z"), "optimeDurableDate" : ISODate("2024-01-05T07:17:26Z"), "lastAppliedWallTime":ISODate("2024005T07:17:26.414Z"), "lastDurableWallTime":ISODate("20240105T07:17:26.414Z"), "lastHeartbeat" : ISODate("2024-01-05T07:17:36.481Z"), "lastHeartbeatRecv":ISODate("2024-0105T07:17:36.772Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "configVersion" : 2, "configTerm" : 3 } ], "ok" : 1,
4、 验证数据同步
repl_cluster:SECONDARY> rs.secondaryOk() repl_cluster:SECONDARY> db.test.find() { "_id" : ObjectId("65962274d846bcd325533e5b"), "x" : 3 } { "_id" : ObjectId("659626a1d846bcd325533e5c"), "name" : "mongo_new", "age" : 5 }
通过oplog日志进行添加节点操作简单，但oplog是capped collection，采用循环的方式处理日志，通过oplog日志来添加节点，可能导致数据的不一致（日志被刷新），因此我们引出快照和oplog相结合的方式来添加节点，保证数据的一致性。
方式：复制一份副本集的物理文件来做初始化数据，然后使用oplog日志来追溯数据，最终达到数据的一致性。
5.3.2 通过数据库快照(--fastsync)和oplog来增加节点
1、复制一份副本集成员的物理文件做初始数据
cp –r /u01/mongodb/node4 /u01/mongodb/node5
2、复制完成后，清理不需要的文件，并插入一条新文档，作为同步验证使用
repl_cluster:PRIMARY> j={name:"node5",age:27022} { "name" : "node5", "age" : 27022 } repl_cluster:PRIMARY> db.test.insert(j) WriteResult({ "nInserted" : 1 }) repl_cluster:PRIMARY> db.test.find() { "_id" : ObjectId("65962274d846bcd325533e5b"), "x" : 3 } { "_id" : ObjectId("659626a1d846bcd325533e5c"), "name" : "mongo_new", "age" : 5 } { "_id" : ObjectId("6597b42827437b37032f0aa2"), "name" : "node5", "age" : 27022 }
3、启动新节点27022端口
[root@erp-db]# sudo -u mongo numactl --interleave=all mongod -f /u01/mongodb/node5/conf/mongodb.conf about to fork child process, waiting until server is ready for connections. forked process: 2520 child process started successfully, parent exiting
4、添加新节点到现有Replica Set
repl_cluster:PRIMARY> rs.add("localhost:27022") { "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1704442052, 1), "signature" : { "hash" : BinData(0,"nQHjkoZke4XsoroiK8SqqisCfsA="), "keyId" : NumberLong("7319816138693541892") } }, "operationTime" : Timestamp(1704442052, 1) }
5、 验证数据同步
repl_cluster:SECONDARY> rs.secondaryOk() repl_cluster:SECONDARY> db.test.find() { "_id" : ObjectId("65962274d846bcd325533e5b"), "x" : 3 } { "_id" : ObjectId("659626a1d846bcd325533e5c"), "name" : "mongo_new", "age" : 5 } { "_id" : ObjectId("6597b42827437b37032f0aa2"), "name" : "node5", "age" : 27022 }
5.4减少节点
将刚刚添加的两个新节点27021和27022从复制集中去除掉，只需执行rs.remove 指令
就可以了，具体如下:
repl_cluster:PRIMARY> rs.remove("localhost:27021") { "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1704444644, 1), "signature" : { "hash" : BinData(0,"2XlJmd+hB0L2oNeXGO4GNwS3E1U="), "keyId" : NumberLong("7319816138693541892") } }, "operationTime" : Timestamp(1704444644, 1) } repl_cluster:PRIMARY> rs.remove("localhost:27022") { "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1704444654, 1), "signature" : { "hash" : BinData(0,"d1MJJ3p+dzvKBS63W3DWVWteb0k="), "keyId" : NumberLong("7319816138693541892") } }, "operationTime" : Timestamp(1704444654, 1) }
查看集群状态，27021,27022节点已经删除
repl_cluster:PRIMARY> rs.status() { "set" : "repl_cluster", "date" : ISODate("2024-01-05T08:51:31.008Z"), "myState" : 1, "term" : NumberLong(3), "syncSourceHost" : "", "syncSourceId" : -1, "heartbeatIntervalMillis" : NumberLong(2000), "majorityVoteCount" : 2, "writeMajorityCount" : 2, "votingMembersCount" : 3, "writableVotingMembersCount" : 3, "members" : [ { "_id" : 0, "name" : "localhost:27018", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 7101, "optime" : { "ts" : Timestamp(1704444687, 1), "t" : NumberLong(3) }, "optimeDurable" : { "ts" : Timestamp(1704444687, 1), "t" : NumberLong(3) }, "optimeDate" : ISODate("2024-01-05T08:51:27Z"), "optimeDurableDate" : ISODate("2024-01-05T08:51:27Z"), "lastAppliedWallTime":ISODate("2024-01-05T08:51:27.956Z"), "lastDurableWallTime":ISODate("2024-0105T08:51:27.956Z"), "lastHeartbeat" : ISODate("2024-01-05T08:51:30.974Z"), "lastHeartbeatRecv" : ISODate("2024-01-05T08:51:30.977Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncSourceHost" : "localhost:27020", "syncSourceId" : 2, "infoMessage" : "", "configVersion" : 5, "configTerm" : 3 }, { "_id" : 1, "name" : "localhost:27019", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 86831, "optime" : { "ts" : Timestamp(1704444687, 1), "t" : NumberLong(3) }, "optimeDate" : ISODate("2024-01-05T08:51:27Z"), "lastAppliedWallTime":ISODate("2024-01-05T08:51:27.956Z"), "lastDurableWallTime":ISODate("2024-0105T08:51:27.956Z"), "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "electionTime" : Timestamp(1704437087, 1), "electionDate" : ISODate("2024-01-05T06:44:47Z"), "configVersion" : 5, "configTerm" : 3, "self" : true, "lastHeartbeatMessage" : "" }, { "_id" : 2, "name" : "localhost:27020", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 86823, "optime" : { "ts" : Timestamp(1704444687, 1), "t" : NumberLong(3) }, "optimeDurable" : { "ts" : Timestamp(1704444687, 1), "t" : NumberLong(3) }, "optimeDate" : ISODate("2024-01-05T08:51:27Z"), "optimeDurableDate" : ISODate("2024-01-05T08:51:27Z"), "lastAppliedWallTime":ISODate("2024-01-05T08:51:27.956Z"), "lastDurableWallTime":ISODate("2024-0105T08:51:27.956Z"), "lastHeartbeat" : ISODate("2024-01-05T08:51:30.975Z"), "lastHeartbeatRecv" : ISODate("2024-01-05T08:51:30.977Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncSourceHost" : "localhost:27019", "syncSourceId" : 1, "infoMessage" : "", "configVersion" : 5, "configTerm" : 3 } ], "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1704444687, 1), "signature" : { "hash" : BinData(0,"bBPDXuxrAqjzfO86rcj13v7mKQI="), "keyId" : NumberLong("7319816138693541892") } }, "operationTime" : Timestamp(1704444687, 1) }
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