MongoDB中怎么利用oplog恢复数据
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今天小编给大家分享一下MongoDB中怎么利用oplog恢复数据的相关知识点，内容详细，逻辑清晰，相信大部分人都还太了解这方面的知识，所以分享这篇文章给大家参考一下，希望大家阅读完这篇文章后有所收获，下面我们一起来了解一下吧。
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：
环境是副本集
必须有全备
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/backup2021-04-30T18:32:29.077+0800writing local.oplog.rs to /mongodb/backup/local/oplog.rs.bson2021-04-30T18:32:32.039+0800local.oplog.rs 71082021-04-30T18:32:35.038+0800local.oplog.rs 179122021-04-30T18:32:38.041+0800local.oplog.rs 282262021-04-30T18:32:41.039+0800local.oplog.rs 386422021-04-30T18:32:44.042+0800local.oplog.rs 506792021-04-30T18:32:47.040+0800local.oplog.rs 640012021-04-30T18:32:50.040+0800local.oplog.rs 772652021-04-30T18:32:53.038+0800local.oplog.rs 897392021-04-30T18:32:56.038+0800local.oplog.rs 1024492021-04-30T18:32:57.697+0800local.oplog.rs 1324592021-04-30T18:32:57.697+0800done dumping local.oplog.rs (132459 documents)解析oplog
bsondump /mongodb/backup/local/oplog.rs.bson > /mongodb/backup/local/local.log2021-04-30T18:34:27.612+0800132459 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/backup2021-04-30T19:00:11.099+0800preparing collections to restore from2021-04-30T19:00:11.100+0800don't know what to do with file "/mongodb/backup/backup/local/111.log", skipping...2021-04-30T19:00:11.100+0800don't know what to do with file "/mongodb/backup/backup/local/local.log", skipping...2021-04-30T19:00:11.116+0800reading metadata for db4.rcmd_1_tag_li_liao from /mongodb/backup/backup/db4/rcmd_1_tag_li_liao.metadata.json2021-04-30T19:00:11.117+0800reading metadata for ycsb.usertable from /mongodb/backup/backup/ycsb/usertable.metadata.json2021-04-30T19:00:11.119+0800reading metadata for db3.db3 from /mongodb/backup/backup/db3/db3.metadata.json2021-04-30T19:00:11.119+0800reading metadata for ycsb1.usertable from /mongodb/backup/backup/ycsb1/usertable.metadata.json2021-04-30T19:00:11.170+0800restoring ycsb.usertable from /mongodb/backup/backup/ycsb/usertable.bson2021-04-30T19:00:11.187+0800restoring ycsb1.usertable from /mongodb/backup/backup/ycsb1/usertable.bson2021-04-30T19:00:11.391+0800restoring db4.rcmd_1_tag_li_liao from /mongodb/backup/backup/db4/rcmd_1_tag_li_liao.bson2021-04-30T19:00:11.580+0800restoring db3.db3 from /mongodb/backup/backup/db3/db3.bson2021-04-30T19:00:11.661+0800no indexes to restore2021-04-30T19:00:11.661+0800finished restoring db3.db3 (6 documents, 0 failures)2021-04-30T19:00:11.662+0800reading metadata for db5.test from /mongodb/backup/backup/db5/test.metadata.json2021-04-30T19:00:12.545+0800restoring db5.test from /mongodb/backup/backup/db5/test.bson2021-04-30T19:00:12.548+0800no indexes to restore2021-04-30T19:00:12.548+0800finished restoring db5.test (0 documents, 0 failures)2021-04-30T19:00:12.548+0800reading metadata for db4.db4 from /mongodb/backup/backup/db4/db4.metadata.json2021-04-30T19:00:13.784+0800no indexes to restore2021-04-30T19:00:13.784+0800finished restoring ycsb1.usertable (30370 documents, 0 failures)2021-04-30T19:00:13.785+0800reading metadata for db4.test1 from /mongodb/backup/backup/db4/test1.metadata.json2021-04-30T19:00:14.099+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+08002021-04-30T19:00:14.843+0800[########################] ycsb.usertable 58.9MB/58.9MB (100.0%)2021-04-30T19:00:14.843+0800no indexes to restore2021-04-30T19:00:14.843+0800finished restoring ycsb.usertable (43458 documents, 0 failures)2021-04-30T19:00:15.339+0800restoring db4.db4 from /mongodb/backup/backup/db4/db4.bson2021-04-30T19:00:17.077+0800restoring db4.test1 from /mongodb/backup/backup/db4/test1.bson2021-04-30T19:00:17.103+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+08002021-04-30T19:00:20.099+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+08002021-04-30T19:00:23.099+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+08002021-04-30T19:00:26.102+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+08002021-04-30T19:00:29.098+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+08002021-04-30T19:00:32.097+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+08002021-04-30T19:00:35.100+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+08002021-04-30T19:00:38.097+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+08002021-04-30T19:00:39.023+0800[########################] db4.test1 104MB/104MB (100.0%)2021-04-30T19:00:39.023+0800no indexes to restore2021-04-30T19:00:39.023+0800finished 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+0800no indexes to restore2021-04-30T19:00:40.386+0800finished 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+0800no indexes to restore2021-04-30T19:02:47.393+0800finished restoring db4.rcmd_1_tag_li_liao (379143 documents, 0 failures)2021-04-30T19:02:47.393+0800restoring users from /mongodb/backup/backup/admin/system.users.bson2021-04-30T19:02:50.655+0800admin.tempusers 2.05KB2021-04-30T19:02:50.655+0800admin.tempusers 2.05KB2021-04-30T19:02:51.905+0800replaying oplog2021-04-30T19:02:53.097+0800oplog 483KB2021-04-30T19:02:56.097+0800oplog 20.2MB2021-04-30T19:02:59.100+0800oplog 36.9MB2021-04-30T19:03:02.097+0800oplog 50.1MB2021-04-30T19:03:05.098+0800oplog 69.0MB2021-04-30T19:03:08.097+0800oplog 90.6MB2021-04-30T19:03:11.097+0800oplog 124MB2021-04-30T19:03:14.097+0800oplog 159MB2021-04-30T19:03:17.098+0800oplog 185MB2021-04-30T19:03:20.097+0800oplog 219MB2021-04-30T19:03:23.098+0800oplog 256MB2021-04-30T19:03:26.097+0800oplog 290MB2021-04-30T19:03:29.097+0800oplog 323MB2021-04-30T19:03:32.097+0800oplog 357MB2021-04-30T19:03:35.097+0800oplog 391MB2021-04-30T19:03:38.098+0800oplog 427MB2021-04-30T19:03:41.098+0800oplog 464MB2021-04-30T19:03:44.097+0800oplog 501MB2021-04-30T19:03:47.097+0800oplog 544MB2021-04-30T19:03:50.098+0800oplog 580MB2021-04-30T19:03:53.098+0800oplog 619MB2021-04-30T19:03:56.098+0800oplog 650MB2021-04-30T19:03:59.099+0800oplog 687MB2021-04-30T19:04:02.097+0800oplog 722MB2021-04-30T19:04:05.097+0800oplog 758MB2021-04-30T19:04:08.098+0800oplog 795MB2021-04-30T19:04:11.097+0800oplog 826MB2021-04-30T19:04:14.098+0800oplog 858MB2021-04-30T19:04:17.102+0800oplog 893MB2021-04-30T19:04:20.097+0800oplog 929MB2021-04-30T19:04:23.098+0800oplog 968MB2021-04-30T19:04:26.098+0800oplog 1001MB2021-04-30T19:04:29.097+0800oplog 1002MB2021-04-30T19:04:32.097+0800oplog 1003MB2021-04-30T19:04:35.097+0800oplog 1004MB2021-04-30T19:04:38.097+0800oplog 1004MB2021-04-30T19:04:38.597+0800applied 130029 oplog entries2021-04-30T19:04:38.597+0800oplog 1005MB2021-04-30T19:04:38.614+08002766634 document(s) restored successfully. 0 document(s) failed to restore.检查恢复结果
> show dbsadmin 0.000GBconfig 0.000GBdb3 0.000GBdb4 3.355GBdb5 0.000GBlocal 0.000GBycsb 0.060GBycsb1 0.041GB> > > use db5switched 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。
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