MongoDB副本集中有一台Secondary节点出现RECOVERING的状态
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arps:RECOVERING> rs.status()rs.status()
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{
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"set" : "arps",
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"date" : ISODate("2017-12-22T02:31:58.803Z"),
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"myState" : 3,
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"members" : [
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{
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"_id" : 0,
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"name" : "172.17.4.37:27017",
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"health" : 1,
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"state" : 2,
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"stateStr" : "SECONDARY",
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"uptime" : 7579839,
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"optime" : Timestamp(1513909913, 3),
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"optimeDate" : ISODate("2017-12-22T02:31:53Z"),
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"lastHeartbeat" : ISODate("2017-12-22T02:31:58.019Z"),
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"lastHeartbeatRecv" : ISODate("2017-12-22T02:31:57.750Z"),
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"pingMs" : 0,
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"syncingTo" : "172.17.4.38:27017",
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"configVersion" : 1
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},
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{
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"_id" : 1,
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"name" : "172.17.4.38:27017",
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"health" : 1,
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"state" : 1,
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"stateStr" : "PRIMARY",
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"uptime" : 7579913,
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"optime" : Timestamp(1513909913, 3),
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"optimeDate" : ISODate("2017-12-22T02:31:53Z"),
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"lastHeartbeat" : ISODate("2017-12-22T02:31:58.051Z"),
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"lastHeartbeatRecv" : ISODate("2017-12-22T02:31:58.018Z"),
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"pingMs" : 0,
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"electionTime" : Timestamp(1506330005, 1),
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"electionDate" : ISODate("2017-09-25T09:00:05Z"),
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"configVersion" : 1
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},
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{
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"_id" : 2,
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"name" : "172.17.4.39:27017",
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"health" : 1,
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"state" : 3,
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"stateStr" : "RECOVERING",//RECOVERING状态
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"uptime" : 7580364,
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"optime" : Timestamp(1473614444, 2),
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"optimeDate" : ISODate("2016-09-11T17:20:44Z"),
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"configVersion" : 1,
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"self" : true
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}
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],
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"ok" : 1
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}
恢复思路:
1.关闭MongoDB故障节点的数据库服务,移除数据目录,启动MongoDB服务,开启自动同步机制,恢复secondary节点。
2.找到另外一个secondary数据节点的快照,关闭写操作。在数据不变化的情况下,获得一致性的备份快照,拷贝至故障节点中,启动MongoDB服务,应用oplog日志。恢复secondary节点。
由于环境数据量小,使用第一种方案。
1.mongodb数据库服务关闭
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arps:RECOVERING> use admin
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switched to db admin
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arps:RECOVERING> db.shutdownServer()
2.删除或者移走数据目录
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[root@mongodb data]# mv /opt/data/mongodb /opt/data/mongodb20171222
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[root@mongodb data]# mkdir /opt/data/mongodb
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[root@mongodb data]# mkdir /opt/data/mongodb/log
3.启动数据库服务且查看状态
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[root@mongodb data]#/opt/software/mongodb-linux-x86_64-3.0.1/bin/mongod -f /opt/software/mongodb-linux-x86_64-3.0.1/bin/mongodb.conf
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arps:STARTUP2> rs.status()
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{
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"set" : "arps",
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"date" : ISODate("2017-12-22T02:46:52.288Z"),
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"myState" : 5,
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"syncingTo" : "172.17.4.38:27017",
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"members" : [
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{
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"_id" : 0,
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"name" : "172.17.4.37:27017",
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"health" : 1,
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"state" : 2,
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"stateStr" : "SECONDARY",
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"uptime" : 25,
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"optime" : Timestamp(1513910813, 3),
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"optimeDate" : ISODate("2017-12-22T02:46:53Z"),
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"lastHeartbeat" : ISODate("2017-12-22T02:46:51.122Z"),
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"lastHeartbeatRecv" : ISODate("2017-12-22T02:46:51.114Z"),
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"pingMs" : 0,
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"syncingTo" : "172.17.4.38:27017",
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"configVersion" : 1
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},
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{
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"_id" : 1,
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"name" : "172.17.4.38:27017",
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"health" : 1,
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"state" : 1,
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"stateStr" : "PRIMARY",
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"uptime" : 25,
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"optime" : Timestamp(1513910813, 3),
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"optimeDate" : ISODate("2017-12-22T02:46:53Z"),
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"lastHeartbeat" : ISODate("2017-12-22T02:46:51.127Z"),
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"lastHeartbeatRecv" : ISODate("2017-12-22T02:46:51.303Z"),
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"pingMs" : 0,
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"electionTime" : Timestamp(1506330005, 1),
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"electionDate" : ISODate("2017-09-25T09:00:05Z"),
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"configVersion" : 1
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},
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{
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"_id" : 2,
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"name" : "172.17.4.39:27017",
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"health" : 1,
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"state" : 5,
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"stateStr" : "STARTUP2",//STARTUP2的状态为:新加入的节点做数据初始化
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"uptime" : 27,
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"optime" : Timestamp(0, 0),
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"optimeDate" : ISODate("1970-01-01T00:00:00Z"),
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"syncingTo" : "172.17.4.38:27017",
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"configVersion" : 1,
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"self" : true
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}
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],
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"ok" : 1
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}
关于副本集的状态,文献参考如下:
过了半个小时之后,数据恢复完成,状态日志如下:
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.....................
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2017-12-22T11:27:02.474+0800 I INDEX [rsSync] building index using bulk method
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2017-12-22T11:27:02.475+0800 I INDEX [rsSync] build index done. scanned 75 total records. 0 secs
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2017-12-22T11:27:02.477+0800 I REPL [rsSync] initial sync data copy, starting syncup
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2017-12-22T11:27:02.798+0800 I REPL [rsSync] oplog sync 1 of 3
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2017-12-22T11:27:03.145+0800 I REPL [ReplicationExecutor] syncing from: 172.17.4.38:27017
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2017-12-22T11:27:03.288+0800 I REPL [rsSync] oplog sync 2 of 3
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2017-12-22T11:27:03.289+0800 I REPL [rsSync] initial sync building indexes
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2017-12-22T11:27:03.289+0800 I REPL [rsSync] initial sync cloning indexes for : demo
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2017-12-22T11:27:03.300+0800 I REPL [SyncSourceFeedback] replset setting syncSourceFeedback to 172.17.4.38:27017
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2017-12-22T11:27:03.390+0800 I STORAGE [rsSync] copying indexes for: { name: "ACT_AUTH_LOG", options: {} }
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2017-12-22T11:27:03.391+0800 I STORAGE [rsSync] copying indexes for: { name: "SYSTEM_DATA_LOG", options: {} }
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2017-12-22T11:27:03.392+0800 I STORAGE [rsSync] copying indexes for: { name: "SYSTEM_ERROR_LOG", options: {} }
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2017-12-22T11:27:03.392+0800 I STORAGE [rsSync] copying indexes for: { name: "SYSTEM_EXTERNAL_PACKET", options: {} }
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2017-12-22T11:27:03.393+0800 I STORAGE [rsSync] copying indexes for: { name: "SYSTEM_EXTERNAL_PACKET_LOG", options: {} }
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2017-12-22T11:27:03.393+0800 I STORAGE [rsSync] copying indexes for: { name: "SYSTEM_JPUSH_LOG", options: {} }
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2017-12-22T11:27:03.394+0800 I STORAGE [rsSync] copying indexes for: { name: "SYSTEM_MESSAGE_LOG", options: {} }
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2017-12-22T11:27:03.395+0800 I STORAGE [rsSync] copying indexes for: { name: "SYSTEM_REQUEST_LOG", options: {} }
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2017-12-22T11:27:03.395+0800 I STORAGE [rsSync] copying indexes for: { name: "SYSTEM_RETRY_MESSAGE", options: {} }
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2017-12-22T11:27:03.395+0800 I STORAGE [rsSync] copying indexes for: { name: "SYSTEM_RUN_LOG", options: { capped: true, size: 536870912 } }
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2017-12-22T11:27:03.396+0800 I STORAGE [rsSync] copying indexes for: { name: "SYSTEM_SMSEMAIL_LOG", options: {} }
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2017-12-22T11:27:03.396+0800 I STORAGE [rsSync] copying indexes for: { name: "SYSTEM_TIMEOUT_LOG", options: {} }
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2017-12-22T11:27:03.397+0800 I REPL [rsSync] oplog sync 3 of 3
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2017-12-22T11:27:03.406+0800 I REPL [rsSync] initial sync finishing up
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2017-12-22T11:27:03.406+0800 I REPL [rsSync] replSet set minValid=5a3c7b93:3
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2017-12-22T11:27:03.429+0800 I REPL [rsSync] initial sync done
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2017-12-22T11:27:03.474+0800 I REPL [ReplicationExecutor] transition to RECOVERING
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2017-12-22T11:27:03.476+0800 I REPL [ReplicationExecutor] transition to SECONDARY
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..................
节点恢复的状态,如下:
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arps:SECONDARY> rs.status()
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...............
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{
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"_id" : 2,
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"name" : "172.17.4.39:27017",
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"health" : 1,
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"state" : 2,
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"stateStr" : "SECONDARY",//恢复完成
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"uptime" : 2500,
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"optime" : Timestamp(1513913295, 3),
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"optimeDate" : ISODate("2017-12-22T03:28:15Z"),
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"syncingTo" : "172.17.4.38:27017",
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"configVersion" : 1,
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"self" : true
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}
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.................
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