MongoDB

MongoDB 数据恢复之 MongoDB利用oplog恢复数据的方法

当我们对数据出现误操作的时候，可以利用oplog恢复数据。

使用前提：

  • 1、环境是副本集
  • 2、必须有全备
  • 2、全备后oplog没有被覆盖

数据全备

mongodump -h 172.16.254.133 –port 27017 -o /mongodb/backup/backup

模拟故障

写入数据

handong1:PRIMARY> for (var i = 1; i <= 100; i++) {
… db.test.insert( { id : i , name: “handong” , name1:”handong”, name2:”handong”, name3:”handong”} )
… }
WriteResult({ “nInserted” : 1 })
handong1:PRIMARY>
handong1:PRIMARY> db.test.count()
100

模拟误操作

handong1:PRIMARY> db.test.remove({})
WriteResult({ “nRemoved” : 100 })
handong1:PRIMARY> db.test.count()
0

所有文档被误删除。

恢复步骤

备份oplog

mongodump -h 172.16.254.133 –port 27017 -d local -c oplog.rs -o /mongodb/backup
2021-04-30T18:32:29.077+0800 writing local.oplog.rs to /mongodb/backup/local/oplog.rs.bson
2021-04-30T18:32:32.039+0800 local.oplog.rs 7108
2021-04-30T18:32:35.038+0800 local.oplog.rs 17912
2021-04-30T18:32:38.041+0800 local.oplog.rs 28226
2021-04-30T18:32:41.039+0800 local.oplog.rs 38642
2021-04-30T18:32:44.042+0800 local.oplog.rs 50679
2021-04-30T18:32:47.040+0800 local.oplog.rs 64001
2021-04-30T18:32:50.040+0800 local.oplog.rs 77265
2021-04-30T18:32:53.038+0800 local.oplog.rs 89739
2021-04-30T18:32:56.038+0800 local.oplog.rs 102449
2021-04-30T18:32:57.697+0800 local.oplog.rs 132459
2021-04-30T18:32:57.697+0800 done dumping local.oplog.rs (132459 documents)

解析oplog

bsondump /mongodb/backup/local/oplog.rs.bson > /mongodb/backup/local/local.log
2021-04-30T18:34:27.612+0800 132459 objects found

将oplog备份和全备复制到standalone机

scp -r backup/ 172.16.254.130:/mongodb/backup/
scp -r local/ 172.16.254.130:/mongodb/backup/backup

查找误操作时间点

通过查看解析完的日志local.log发现误操作的时间点在1619778429。

进行数据恢复

mongorestore -h 172.16.254.130 –port 27017 –oplogReplay –oplogLimit 1619778429:1 /mongodb/backup/backup
2021-04-30T19:00:11.099+0800 preparing collections to restore from
2021-04-30T19:00:11.100+0800 don’t know what to do with file “/mongodb/backup/backup/local/111.log”, skipping…
2021-04-30T19:00:11.100+0800 don’t know what to do with file “/mongodb/backup/backup/local/local.log”, skipping…
2021-04-30T19:00:11.116+0800 reading metadata for db4.rcmd_1_tag_li_liao from /mongodb/backup/backup/db4/rcmd_1_tag_li_liao.metadata.json
2021-04-30T19:00:11.117+0800 reading metadata for ycsb.usertable from /mongodb/backup/backup/ycsb/usertable.metadata.json
2021-04-30T19:00:11.119+0800 reading metadata for db3.db3 from /mongodb/backup/backup/db3/db3.metadata.json
2021-04-30T19:00:11.119+0800 reading metadata for ycsb1.usertable from /mongodb/backup/backup/ycsb1/usertable.metadata.json
2021-04-30T19:00:11.170+0800 restoring ycsb.usertable from /mongodb/backup/backup/ycsb/usertable.bson
2021-04-30T19:00:11.187+0800 restoring ycsb1.usertable from /mongodb/backup/backup/ycsb1/usertable.bson
2021-04-30T19:00:11.391+0800 restoring db4.rcmd_1_tag_li_liao from /mongodb/backup/backup/db4/rcmd_1_tag_li_liao.bson
2021-04-30T19:00:11.580+0800 restoring db3.db3 from /mongodb/backup/backup/db3/db3.bson
2021-04-30T19:00:11.661+0800 no indexes to restore
2021-04-30T19:00:11.661+0800 finished restoring db3.db3 (6 documents, 0 failures)
2021-04-30T19:00:11.662+0800 reading metadata for db5.test from /mongodb/backup/backup/db5/test.metadata.json
2021-04-30T19:00:12.545+0800 restoring db5.test from /mongodb/backup/backup/db5/test.bson
2021-04-30T19:00:12.548+0800 no indexes to restore
2021-04-30T19:00:12.548+0800 finished restoring db5.test (0 documents, 0 failures)
2021-04-30T19:00:12.548+0800 reading metadata for db4.db4 from /mongodb/backup/backup/db4/db4.metadata.json
2021-04-30T19:00:13.784+0800 no indexes to restore
2021-04-30T19:00:13.784+0800 finished restoring ycsb1.usertable (30370 documents, 0 failures)
2021-04-30T19:00:13.785+0800 reading metadata for db4.test1 from /mongodb/backup/backup/db4/test1.metadata.json
2021-04-30T19:00:14.099+0800 [###################…..] ycsb.usertable 47.8MB/58.9MB (81.2%)
2021-04-30T19:00:14.099+0800 [……………………] db4.rcmd_1_tag_li_liao 79.8MB/3.32GB (2.3%)
2021-04-30T19:00:14.099+0800
2021-04-30T19:00:14.843+0800 [########################] ycsb.usertable 58.9MB/58.9MB (100.0%)
2021-04-30T19:00:14.843+0800 no indexes to restore
2021-04-30T19:00:14.843+0800 finished restoring ycsb.usertable (43458 documents, 0 failures)
2021-04-30T19:00:15.339+0800 restoring db4.db4 from /mongodb/backup/backup/db4/db4.bson
2021-04-30T19:00:17.077+0800 restoring db4.test1 from /mongodb/backup/backup/db4/test1.bson
2021-04-30T19:00:17.103+0800 [#…………………..] db4.rcmd_1_tag_li_liao 167MB/3.32GB (4.9%)
2021-04-30T19:00:17.104+0800 [#…………………..] db4.db4 8.11MB/137MB (5.9%)
2021-04-30T19:00:17.104+0800 [……………………] db4.test1 0B/104MB (0.0%)
2021-04-30T19:00:17.104+0800
2021-04-30T19:00:20.099+0800 [#…………………..] db4.rcmd_1_tag_li_liao 204MB/3.32GB (6.0%)
2021-04-30T19:00:20.099+0800 [####………………..] db4.db4 24.5MB/137MB (18.0%)
2021-04-30T19:00:20.099+0800 [#…………………..] db4.test1 4.47MB/104MB (4.3%)
2021-04-30T19:00:20.099+0800
2021-04-30T19:00:23.099+0800 [#…………………..] db4.rcmd_1_tag_li_liao 272MB/3.32GB (8.0%)
2021-04-30T19:00:23.099+0800 [######………………] db4.db4 39.7MB/137MB (29.1%)
2021-04-30T19:00:23.099+0800 [####………………..] db4.test1 20.1MB/104MB (19.3%)
2021-04-30T19:00:23.099+0800
2021-04-30T19:00:26.102+0800 [##………………….] db4.rcmd_1_tag_li_liao 355MB/3.32GB (10.4%)
2021-04-30T19:00:26.102+0800 [##########…………..] db4.db4 58.0MB/137MB (42.5%)
2021-04-30T19:00:26.102+0800 [########…………….] db4.test1 38.1MB/104MB (36.7%)
2021-04-30T19:00:26.102+0800
2021-04-30T19:00:29.098+0800 [##………………….] db4.rcmd_1_tag_li_liao 401MB/3.32GB (11.8%)
2021-04-30T19:00:29.098+0800 [############…………] db4.db4 73.1MB/137MB (53.5%)
2021-04-30T19:00:29.098+0800 [###########………….] db4.test1 51.8MB/104MB (49.8%)
2021-04-30T19:00:29.098+0800
2021-04-30T19:00:32.097+0800 [###…………………] db4.rcmd_1_tag_li_liao 494MB/3.32GB (14.5%)
2021-04-30T19:00:32.097+0800 [###############………] db4.db4 90.8MB/137MB (66.5%)
2021-04-30T19:00:32.097+0800 [###############………] db4.test1 67.3MB/104MB (64.7%)
2021-04-30T19:00:32.097+0800
2021-04-30T19:00:35.100+0800 [###…………………] db4.rcmd_1_tag_li_liao 556MB/3.32GB (16.3%)
2021-04-30T19:00:35.100+0800 [###################…..] db4.db4 110MB/137MB (80.5%)
2021-04-30T19:00:35.100+0800 [###################…..] db4.test1 86.1MB/104MB (82.8%)
2021-04-30T19:00:35.100+0800
2021-04-30T19:00:38.097+0800 [####………………..] db4.rcmd_1_tag_li_liao 620MB/3.32GB (18.2%)
2021-04-30T19:00:38.097+0800 [#####################…] db4.db4 124MB/137MB (91.1%)
2021-04-30T19:00:38.097+0800 [#######################.] db4.test1 101MB/104MB (96.7%)
2021-04-30T19:00:38.097+0800
2021-04-30T19:00:39.023+0800 [########################] db4.test1 104MB/104MB (100.0%)
2021-04-30T19:00:39.023+0800 no indexes to restore
2021-04-30T19:00:39.023+0800 finished restoring db4.test1 (1000000 documents, 0 failures)
2021-04-30T19:00:40.386+0800 [########################] db4.db4 137MB/137MB (100.0%)
2021-04-30T19:00:40.386+0800 no indexes to restore
2021-04-30T19:00:40.386+0800 finished restoring db4.db4 (1313657 documents, 0 failures)
2021-04-30T19:00:41.097+0800 [####………………..] db4.rcmd_1_tag_li_liao 684MB/3.32GB (20.1%)
2021-04-30T19:00:44.097+0800 [#####……………….] db4.rcmd_1_tag_li_liao 760MB/3.32GB (22.3%)
2021-04-30T19:00:47.097+0800 [#####……………….] db4.rcmd_1_tag_li_liao 836MB/3.32GB (24.6%)
2021-04-30T19:00:50.098+0800 [######………………] db4.rcmd_1_tag_li_liao 906MB/3.32GB (26.6%)
2021-04-30T19:00:53.098+0800 [#######……………..] db4.rcmd_1_tag_li_liao 994MB/3.32GB (29.2%)
2021-04-30T19:00:56.098+0800 [#######……………..] db4.rcmd_1_tag_li_liao 1.03GB/3.32GB (31.0%)
2021-04-30T19:00:59.098+0800 [########…………….] db4.rcmd_1_tag_li_liao 1.11GB/3.32GB (33.3%)
2021-04-30T19:01:02.097+0800 [########…………….] db4.rcmd_1_tag_li_liao 1.18GB/3.32GB (35.5%)
2021-04-30T19:01:05.101+0800 [#########……………] db4.rcmd_1_tag_li_liao 1.26GB/3.32GB (38.0%)
2021-04-30T19:01:08.097+0800 [#########……………] db4.rcmd_1_tag_li_liao 1.32GB/3.32GB (39.7%)
2021-04-30T19:01:11.100+0800 [#########……………] db4.rcmd_1_tag_li_liao 1.37GB/3.32GB (41.1%)
2021-04-30T19:01:14.098+0800 [##########…………..] db4.rcmd_1_tag_li_liao 1.43GB/3.32GB (43.2%)
2021-04-30T19:01:17.097+0800 [##########…………..] db4.rcmd_1_tag_li_liao 1.50GB/3.32GB (45.0%)
2021-04-30T19:01:20.098+0800 [###########………….] db4.rcmd_1_tag_li_liao 1.54GB/3.32GB (46.3%)
2021-04-30T19:01:23.098+0800 [###########………….] db4.rcmd_1_tag_li_liao 1.58GB/3.32GB (47.6%)
2021-04-30T19:01:26.098+0800 [###########………….] db4.rcmd_1_tag_li_liao 1.64GB/3.32GB (49.3%)
2021-04-30T19:01:29.097+0800 [############…………] db4.rcmd_1_tag_li_liao 1.71GB/3.32GB (51.4%)
2021-04-30T19:01:32.097+0800 [############…………] db4.rcmd_1_tag_li_liao 1.77GB/3.32GB (53.2%)
2021-04-30T19:01:35.098+0800 [#############………..] db4.rcmd_1_tag_li_liao 1.85GB/3.32GB (55.7%)
2021-04-30T19:01:38.097+0800 [#############………..] db4.rcmd_1_tag_li_liao 1.90GB/3.32GB (57.2%)
2021-04-30T19:01:41.097+0800 [##############……….] db4.rcmd_1_tag_li_liao 1.98GB/3.32GB (59.5%)
2021-04-30T19:01:44.827+0800 [##############……….] db4.rcmd_1_tag_li_liao 2.00GB/3.32GB (60.3%)
2021-04-30T19:01:47.097+0800 [##############……….] db4.rcmd_1_tag_li_liao 2.05GB/3.32GB (61.8%)
2021-04-30T19:01:50.098+0800 [###############………] db4.rcmd_1_tag_li_liao 2.12GB/3.32GB (63.9%)
2021-04-30T19:01:53.097+0800 [###############………] db4.rcmd_1_tag_li_liao 2.19GB/3.32GB (65.9%)
2021-04-30T19:01:56.097+0800 [################……..] db4.rcmd_1_tag_li_liao 2.26GB/3.32GB (67.9%)
2021-04-30T19:01:59.099+0800 [################……..] db4.rcmd_1_tag_li_liao 2.32GB/3.32GB (69.8%)
2021-04-30T19:02:02.098+0800 [#################…….] db4.rcmd_1_tag_li_liao 2.39GB/3.32GB (72.0%)
2021-04-30T19:02:05.097+0800 [#################…….] db4.rcmd_1_tag_li_liao 2.47GB/3.32GB (74.4%)
2021-04-30T19:02:08.097+0800 [##################……] db4.rcmd_1_tag_li_liao 2.52GB/3.32GB (76.0%)
2021-04-30T19:02:11.097+0800 [##################……] db4.rcmd_1_tag_li_liao 2.59GB/3.32GB (77.8%)
2021-04-30T19:02:14.097+0800 [###################…..] db4.rcmd_1_tag_li_liao 2.66GB/3.32GB (80.0%)
2021-04-30T19:02:17.097+0800 [###################…..] db4.rcmd_1_tag_li_liao 2.72GB/3.32GB (81.9%)
2021-04-30T19:02:20.097+0800 [####################….] db4.rcmd_1_tag_li_liao 2.78GB/3.32GB (83.7%)
2021-04-30T19:02:23.097+0800 [####################….] db4.rcmd_1_tag_li_liao 2.85GB/3.32GB (85.7%)
2021-04-30T19:02:26.098+0800 [#####################…] db4.rcmd_1_tag_li_liao 2.94GB/3.32GB (88.4%)
2021-04-30T19:02:29.097+0800 [#####################…] db4.rcmd_1_tag_li_liao 3.00GB/3.32GB (90.4%)
2021-04-30T19:02:32.097+0800 [######################..] db4.rcmd_1_tag_li_liao 3.06GB/3.32GB (92.1%)
2021-04-30T19:02:35.099+0800 [######################..] db4.rcmd_1_tag_li_liao 3.12GB/3.32GB (93.9%)
2021-04-30T19:02:38.097+0800 [######################..] db4.rcmd_1_tag_li_liao 3.15GB/3.32GB (95.0%)
2021-04-30T19:02:41.098+0800 [#######################.] db4.rcmd_1_tag_li_liao 3.21GB/3.32GB (96.7%)
2021-04-30T19:02:44.167+0800 [#######################.] db4.rcmd_1_tag_li_liao 3.26GB/3.32GB (98.0%)
2021-04-30T19:02:47.097+0800 [#######################.] db4.rcmd_1_tag_li_liao 3.32GB/3.32GB (99.9%)
2021-04-30T19:02:47.392+0800 [########################] db4.rcmd_1_tag_li_liao 3.32GB/3.32GB (100.0%)
2021-04-30T19:02:47.393+0800 no indexes to restore
2021-04-30T19:02:47.393+0800 finished restoring db4.rcmd_1_tag_li_liao (379143 documents, 0 failures)
2021-04-30T19:02:47.393+0800 restoring users from /mongodb/backup/backup/admin/system.users.bson
2021-04-30T19:02:50.655+0800 admin.tempusers 2.05KB
2021-04-30T19:02:50.655+0800 admin.tempusers 2.05KB
2021-04-30T19:02:51.905+0800 replaying oplog
2021-04-30T19:02:53.097+0800 oplog 483KB
2021-04-30T19:02:56.097+0800 oplog 20.2MB
2021-04-30T19:02:59.100+0800 oplog 36.9MB
2021-04-30T19:03:02.097+0800 oplog 50.1MB
2021-04-30T19:03:05.098+0800 oplog 69.0MB
2021-04-30T19:03:08.097+0800 oplog 90.6MB
2021-04-30T19:03:11.097+0800 oplog 124MB
2021-04-30T19:03:14.097+0800 oplog 159MB
2021-04-30T19:03:17.098+0800 oplog 185MB
2021-04-30T19:03:20.097+0800 oplog 219MB
2021-04-30T19:03:23.098+0800 oplog 256MB
2021-04-30T19:03:26.097+0800 oplog 290MB
2021-04-30T19:03:29.097+0800 oplog 323MB
2021-04-30T19:03:32.097+0800 oplog 357MB
2021-04-30T19:03:35.097+0800 oplog 391MB
2021-04-30T19:03:38.098+0800 oplog 427MB
2021-04-30T19:03:41.098+0800 oplog 464MB
2021-04-30T19:03:44.097+0800 oplog 501MB
2021-04-30T19:03:47.097+0800 oplog 544MB
2021-04-30T19:03:50.098+0800 oplog 580MB
2021-04-30T19:03:53.098+0800 oplog 619MB
2021-04-30T19:03:56.098+0800 oplog 650MB
2021-04-30T19:03:59.099+0800 oplog 687MB
2021-04-30T19:04:02.097+0800 oplog 722MB
2021-04-30T19:04:05.097+0800 oplog 758MB
2021-04-30T19:04:08.098+0800 oplog 795MB
2021-04-30T19:04:11.097+0800 oplog 826MB
2021-04-30T19:04:14.098+0800 oplog 858MB
2021-04-30T19:04:17.102+0800 oplog 893MB
2021-04-30T19:04:20.097+0800 oplog 929MB
2021-04-30T19:04:23.098+0800 oplog 968MB
2021-04-30T19:04:26.098+0800 oplog 1001MB
2021-04-30T19:04:29.097+0800 oplog 1002MB
2021-04-30T19:04:32.097+0800 oplog 1003MB
2021-04-30T19:04:35.097+0800 oplog 1004MB
2021-04-30T19:04:38.097+0800 oplog 1004MB
2021-04-30T19:04:38.597+0800 applied 130029 oplog entries
2021-04-30T19:04:38.597+0800 oplog 1005MB
2021-04-30T19:04:38.614+0800 2766634 document(s) restored successfully. 0 document(s) failed to restore.

检查恢复结果

> show dbs
admin 0.000GB
config 0.000GB
db3 0.000GB
db4 3.355GB
db5 0.000GB
local 0.000GB
ycsb 0.060GB
ycsb1 0.041GB
>
>
> use db5
switched to db db5
>
> db.test.count()
100

可以看到我们前期插入的100记录以及恢复成功。

到此这篇关于MongoDB利用oplog恢复数据介绍的文章就介绍到这了,更多相关oplog数据恢复内容请搜索以前的文章或继续浏览下面的相关文章希望大家以后多多支持！


数据运维技术 » MongoDB 数据恢复之 MongoDB利用oplog恢复数据的方法
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