mongo2.4_point_in_time_recovery

--配置复制集
/opt/mongodb/2.4/bin/mongod --replSet=rs1 --journal --port 27018 --dbpath=/data/mongodb/27018 --logpath=/data/mongodb/log/27018/mongo.log --fork --logappend
/opt/mongodb/2.4/bin/mongod --replSet=rs1 --journal --port 27019 --dbpath=/data/mongodb/27019 --logpath=/data/mongodb/log/27019/mongo.log --fork --logappend
/opt/mongodb/2.4/bin/mongod --replSet=rs1 --journal --port 27020 --dbpath=/data/mongodb/27020 --logpath=/data/mongodb/log/27020/mongo.log --fork --logappend
--初始化复制集，连接一台mongo
use admin
db.runCommand({"replSetInitiate":{
"_id":"rs1",
"members":[{
"_id":1,
"host":"192.168.250.17:27018",
"priority":3
},
{
"_id":2,
"host":"192.168.250.17:27019",
"priority":2
},
{
"_id":3,
"host":"192.168.250.17:27020",
"arbiterOnly":true
}
]}})

--同样可执行如下语句
rs.initiate()


--在主上插入测试数据
 for (var i=0;i<100;i++) {db.userinfo.insert({"id":i,"name":"rudy"+i,password:i+"password"}); }

--在从上执行数据库备份
 mongodump --port 27019 -o /tmp/backup/dump`date +%Y%m%d` --host=192.168.250.17

--继续在主上执行数据
 for (var i=100;i<200;i++) {db.userinfo.insert({"id":i,"name":"rudy"+i,password:i+"password"}); }

 --强制primary和standard节点角色互换
rs.stepDown() 

--在新主上做数据变更
 for (var i=200;i<300;i++) {db.userinfo.insert({"id":i,"name":"rudy"+i,password:i+"password"}); }
 db.userinfo.update({},{$inc:{id:10000},$set:{password:"123456"}},{multi:true});

 --现在需要恢复到第二次插入数据之后时间点

 --查询在指定时间段内的操作的时间点，注意时区
db.oplog.rs.find({
    "ts": {
        $gt: Timestamp(new Date("2016-03-01T03:20:00Z").getTime() / 1000, 1),
        $lt: Timestamp(new Date("2016-03-01T03:31:00Z").getTime() / 1000, 1)
    },
    "op": "i",
    "ns": "test.userinfo",
    "o.id": {$lt:201}
}).sort({
    $natural: -1
}).limit(3)

{ "ts" : Timestamp(1456802915, 1), "h" : NumberLong("2333357293330368223"), "v" : 2, "op" : "i", "ns" : "test.userinfo", "o" : { "_id" : ObjectId("56d50c6306abfb157a0a2f36"), "id" : 200, "name" : "rudy200", "password" : "200password" } }
{ "ts" : Timestamp(1456802551, 100), "h" : NumberLong("1328300502301838340"), "v" : 2, "op" : "i", "ns" : "test.userinfo", "o" : { "_id" : ObjectId("56d50af7a7edfd6396d2f679"), "id" : 199, "name" : "rudy199", "password" : "199password" } }
{ "ts" : Timestamp(1456802551, 99), "h" : NumberLong("-6657180556193796443"), "v" : 2, "op" : "i", "ns" : "test.userinfo", "o" : { "_id" : ObjectId("56d50af7a7edfd6396d2f678"), "id" : 198, "name" : "rudy198", "password" : "198password" } }

--备份指定时间点之前的oplog操作
mongodump -h 192.168.250.17 --port 27018 -d local -c "oplog.rs" -q '{ts:{$lt:Timestamp(1456802915, 1)}}' -o /tmp/backup/oplog

--启动一个实例进行数据恢复
/opt/mongodb/2.4/bin/mongod --journal --port 27021 --dbpath=/data/mongodb/27021 --logpath=/data/mongodb/log/27021/mongo.log --fork --logappend
/opt/mongodb/2.4/bin/mongorestore -dir /tmp/backup/dump`date +%Y%m%d` --host 192.168.250.17 --port 27021
--可以发现已经恢复了前100条数据
[root@localhost local]# mongo --port 27021
MongoDB shell version: 2.4.10
connecting to: 127.0.0.1:27021/test
> db.userinfo.count()
100
> db.userinfo.find()
{ "_id" : ObjectId("56d50a2ca7edfd6396d2f5b2"), "id" : 0, "name" : "rudy0", "password" : "0password" }
{ "_id" : ObjectId("56d50a2ca7edfd6396d2f5b3"), "id" : 1, "name" : "rudy1", "password" : "1password" }
{ "_id" : ObjectId("56d50a2ca7edfd6396d2f5b4"), "id" : 2, "name" : "rudy2", "password" : "2password" }
{ "_id" : ObjectId("56d50a2ca7edfd6396d2f5b5"), "id" : 3, "name" : "rudy3", "password" : "3password" }

--把oplog恢复到一个实例中，注意此处为了方便直接恢复到实例27021了，但在生产环境中不建议，其会与实例27021的相混
/opt/mongodb/2.4/bin/mongorestore  --host 192.168.250.17 --port 27021 -dir /tmp/backup/oplog/local/
--实用oplog到恢复数据库27021
mongooplog -h 192.168.250.17 --port 27021  --from 192.168.250.17:27021 --oplogns "local.oplog.rs"
--至此可发现数据恢复已完成
[root@localhost local]# mongo --port 27021
> db.userinfo.count()
200