【MongoDB】副本集通过一致性备份增加新节点

[mongod@node01 ~]# openssl rand -base64 666 > /var/lib/mongo/keyfile
[mongod@node01 ~]# chown mongod:mongod /var/lib/mongo/keyfile
[mongod@node01 ~]# chmod 600 /var/lib/mongo/keyfile
[mongod@node01 ~]# l /var/lib/mongo/keyfile
-rw------- 1 mongod mongod 902 Sep  1 10:37 /var/lib/mongo/keyfile

[mongod@node01 ~]# scp /var/lib/mongo/keyfile node02:/var/lib/mongo/
[mongod@node01 ~]# scp /var/lib/mongo/keyfile node03:/var/lib/mongo/

[root@node01 ~]# vim /etc/mongod.conf  
security:
  authorization: enabled
  clusterAuthMode: keyFile
  keyFile: /var/lib/mongo/keyfile
  
replication:
  replSetName: "rs01"

[root@node01 ~]# systemctl restart mongod
[root@node01 ~]# mongo -u "root" -p "abcd.1234" --authenticationDatabase "admin"
> rs.initiate() 

rs01:PRIMARY> use local
switched to db local
rs01:PRIMARY> db.oplog.rs.stats().maxSize
1038090240

node01执行备份
[mongod@node01 ~]# mongodump -uroot -pabcd.1234 --authenticationDatabase=admin --oplog -o /home/mongod/backup

通过scp复制到node02
[mongod@node01 ~]# scp -r backup/* node02:/home/mongod/backup/

node02以单实例方式启动
[root@node02 ~]# vim /etc/mongod.conf 
#security:
#  authorization: enabled
#  clusterAuthMode: keyFile
#  keyFile: /var/lib/mongo/keyfile
  
#replication:
#  replSetName: "rs01"

node02执行恢复
[mongod@node02 ~]$ mongorestore --oplogReplay --dir /home/mongod/backup

在node02创建oplog.rs集合
[mongod@node02 ~]$ mongo
> use local
switched to db local
> db.createCollection("oplog.rs",{"capped":true,"size":1038090240})
{ "ok" : 1 }

在node02恢复oplog.rs集合
[mongod@node02 ~]$  mongorestore -d local -c oplog.rs  /home/mongod/backup/oplog.bson

在node01查询replset.election集合
rs01:PRIMARY> use local
switched to db local
rs01:PRIMARY> db.replset.election.find()
{ "_id" : ObjectId("64f14f56845ba9f11d295ee1"), "term" : NumberLong(1), "candidateIndex" : NumberLong(0) }

在node02保存node01查询的ection集合的数据
> use local
switched to db local
> db.replset.election.save({ "_id" : ObjectId("64f14f56845ba9f11d295ee1"), "term" : NumberLong(1), "candidateIndex" : NumberLong(0)})

node02以副本集方式启动
[root@node02 ~]# vim /etc/mongod.conf
security:
  authorization: enabled
  clusterAuthMode: keyFile
  keyFile: /var/lib/mongo/keyfile

replication:
  replSetName: "rs01"

[root@node02 ~]# systemctl restart mongod  


在node01执行增加节点操作
rs01:PRIMARY> rs.add("192.168.1.102:27017")
{
        "ok" : 1,
        "$clusterTime" : {
                "clusterTime" : Timestamp(1693542188, 1),
                "signature" : {
                        "hash" : BinData(0,"RGkEIE8wI79S5Uk7f7eUVqGFA1g="),
                        "keyId" : NumberLong("7273693227931140101")
                }
        },
        "operationTime" : Timestamp(1693542188, 1)
}

rs01:PRIMARY> rs.status().members
[
        {
                "_id" : 0,
                "name" : "node01:27017",
                "health" : 1,
                "state" : 1,
                "stateStr" : "PRIMARY",
                "uptime" : 8783,
                "optime" : {
                        "ts" : Timestamp(1693544857, 1),
                        "t" : NumberLong(1)
                },
                "optimeDate" : ISODate("2023-09-01T05:07:37Z"),
                "syncingTo" : "",
                "syncSourceHost" : "",
                "syncSourceId" : -1,
                "infoMessage" : "",
                "electionTime" : Timestamp(1693538676, 2),
                "electionDate" : ISODate("2023-09-01T03:24:36Z"),
                "configVersion" : 2,
                "self" : true,
                "lastHeartbeatMessage" : ""
        },
        {
                "_id" : 1,
                "name" : "192.168.1.102:27017",
                "health" : 1,
                "state" : 2,
                "stateStr" : "SECONDARY",
                "uptime" : 2674,
                "optime" : {
                        "ts" : Timestamp(1693544857, 1),
                        "t" : NumberLong(1)
                },
                "optimeDurable" : {
                        "ts" : Timestamp(1693544857, 1),
                        "t" : NumberLong(1)
                },
                "optimeDate" : ISODate("2023-09-01T05:07:37Z"),
                "optimeDurableDate" : ISODate("2023-09-01T05:07:37Z"),
                "lastHeartbeat" : ISODate("2023-09-01T05:07:42.388Z"),
                "lastHeartbeatRecv" : ISODate("2023-09-01T05:07:43.268Z"),
                "pingMs" : umberLong(1),
                "lastHeartbeatMessage" : "",
                "syncingTo" : "node01:27017",
                "syncSourceHost" : "node01:27017",
                "syncSourceId" : 0,
                "infoMessage" : "",
                "configVersion" : 2
        }
]

验证
rs01:PRIMARY> use tpcc10
switched to db tpcc10
rs01:PRIMARY> db.customer.count()
299702

rs01:SECONDARY> use tpcc10
switched to db tpcc10
rs01:SECONDARY>  db.customer.count()
299702

rs01:SECONDARY> rs.secondaryOk()