MongoDB replication set settings Replication Sets<\/p>\n
Master-Slave Master-slave replication: -master only need to add a parameter when a service starts, while another service plus -slave and -source parameters, you can achieve synchronization.<\/p>\n
The latest version of MongoDB is no longer recommended for this program.<\/p>\n
Replica Sets replication set: MongoDB version 1.6 for developers of new features replica set, which is stronger than some of the previous replication function, increased fault automatic switching and automatic restoration member nodes, exactly the same data between various DB, greatly reducing maintenance success. auto shard has been clearly stated does not support replication paris, we recommended replica set, replica set failover is completely automatic.<\/p>\n
Replica Sets structure is very similar to a cluster, if one node failure occurs, the other nodes will immediately take over the business without having to shut down operations.<\/p>\n
??MongoDB<\/p>\n
[root@node1 ~]# vim \/etc\/yum.repos.d\/Mongodb.repo<\/p>\n
[mongodb-org-3.4]
\n name=MongoDB Repository
\n baseurl=https:\/\/repo.mongodb.org\/yum\/RedHat\/$releasever\/mongodb-org\/3.4\/x86_64\/
\n gpgcheck=1
\n enabled=1
\n gpgkey=https:\/\/www.mongodb.org\/static\/pgp\/server-3.4.asc<\/p>\n
[root@node1 ~]# yum install -y mongodb-org<\/p>\n
[root@node1 ~]# service mongod start
\n Starting mongod: [ OK ]<\/p>\n
[root@node1 ~]# ps aux|grep mong
\n mongod 1361 5.7 14.8 351180 35104 ? Sl 01:26 0:01 \/usr\/bin\/mongod -f \/etc\/mongod.conf<\/p>\n
[root@node1 ~]# mkdir -p \/mongodb\/data
\n [root@node1 ~]# chown -R mongod:mongod \/mongodb\/
\n [root@node1 ~]# ll \/mongodb\/
\n total 4
\n drwxr-xr-x 2 mongod mongod 4096 May 18 02:04 data<\/p>\n
[root@node1 ~]# grep -v “^#” \/etc\/mongod.conf |grep -v “^$”
\n systemLog:
\n destination: file
\n logAppend: true
\n path: \/var\/log\/mongodb\/mongod.log
\n storage:
\n dbPath: \/mongodb\/data
\n journal:
\n enabled: true
\n processManagement:
\n fork: true # fork and run in background
\n pidFilePath: \/var\/run\/mongodb\/mongod.pid # location of pidfile
\n net:
\n port: 27017
\n bindIp: 0.0.0.0 # Listen to local interface only, comment to listen on all interfaces.<\/p>\n
[root@node1 ~]# service mongod start
\n Starting mongod: [ OK ]<\/p>\n
node2?node2<\/p>\n
Replication Sets<\/p>\n
–oplogSize
\n –dbpath
\n –logpath
\n –port
\n –replSet
\n –replSet test\/
\n –maxConns
\n –fork
\n –logappend
\n –keyFile <\/p>\n
v3.4.4<\/p>\n
[root@node1 ~]# vim \/etc\/mongod.conf
\n replication:
\n oplogSizeMB: 1024
\n replSetName: rs0<\/p>\n
Keyfile<\/p>\n
openssl rand -base64 756 > Configuration File Command Line mongod –keyFile Replication Sets?<\/p>\n [root@node1 ~]# openssl rand -base64 756 > \/mongodb\/mongokey [root@node1 ~]# chmod 400 \/mongodb\/mongokey [root@node1 ~]# vim \/etc\/mongod.conf #operationProfiling:<\/p>\n #replication: [root@node1 ~]# service mongod restart [root@node1 ~]# iptables -I INPUT 4 -m state –state NEW -p tcp –dport 27017 -j ACCEPT<\/p>\n hosts [root@node1 ~]# rsync -avH –progress ‘-e ssh -p 22’ \/mongodb\/mongokey root@node3.rmohan.com:\/mongodb\/ [root@node1 ~]# rsync -avH –progress ‘-e ssh -p 22’ \/etc\/mongod.conf root@node2.rmohan.com:\/etc\/ rsync?openssh-clients<\/p>\n [root@node1 ~]# mongo > rs.help() > rs.status() > rs.initiate() rs0:OTHER> rs0:PRIMARY> rs.add(“node2.rmohan.com”) rs0:PRIMARY> db.isMaster() rs0:PRIMARY> use testdb node2: node3:<\/p>\n rs0:SECONDARY> rs.slaveOk() rs0:PRIMARY> use local rs0:PRIMARY> db.printReplicationInfo() db.oplog.rs.find()? rs0:PRIMARY> db.printSlaveReplicationInfo() db.system.replset.find()?<\/p>\n rs0:PRIMARY> db.system.replset.find() rs0:PRIMARY> db.system.replset.find().forEach(printjson) <\/p>\n 1 node3<\/p>\n rs0:SECONDARY> rs.freeze(30) 2?node1 PRIMARY 30 [root@node1 ~]# rsync -avH –progress ‘-e ssh -p 22’ \/etc\/hosts root@node2.rmohan.com:\/etc\/<\/p>\n [root@node1 ~]# rsync -avH –progress ‘-e ssh -p 22’ \/mongodb\/mongokey root@node4.rmohan.com:\/mongodb\/<\/p>\n [root@node1 ~]# rsync -avH –progress ‘-e ssh -p 22’ \/etc\/mongod.conf root@node4.rmohan.com:\/etc\/<\/p>\n [root@node4 ~]# iptables -I INPUT 4 -m state –state NEW -p tcp –dport 27017 -j ACCEPT<\/p>\n rs0:PRIMARY> rs.add(“node4.rmohan.com”) rs0:PRIMARY> rs.status() rs0:SECONDARY> rs.slaveOk() 2?<\/p>\n rs0:PRIMARY> rs.remove(“node4.rmohan.com:27017”) rs0:PRIMARY> db.isMaster() MongoDB replication set settings Replication Sets<\/p>\n Master-Slave Master-slave replication: -master only need to add a parameter when a service starts, while another service plus -slave and -source parameters, you can achieve synchronization.<\/p>\n The latest version of MongoDB is no longer recommended for this program.<\/p>\n Replica Sets replication set: MongoDB version 1.6 for developers of new […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/6751"}],"collection":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6751"}],"version-history":[{"count":1,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/6751\/revisions"}],"predecessor-version":[{"id":6752,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/6751\/revisions\/6752"}],"wp:attachment":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6751"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6751"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6751"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n If using a configuration file, set the security.keyFile option to the keyfile\u2019s path, and the replication.replSetName option to the replica set name:
\n security:
\n keyFile:
\n replSetName:
\n If using the command line option, start the mongod with the –keyFile and –replSet parameters:<\/p>\n
\n [root@node1 ~]# cat \/mongodb\/mongokey
\n gxpcgjyFj2qE8b9TB\/0XbdRVYH9VDb55NY03AHwxCFU58MUjJMeez844i1gaUo\/t
\n …..
\n …..<\/p>\n
\n [root@node1 ~]# chown mongod:mongod \/mongodb\/mongokey
\n [root@node1 ~]# ll \/mongodb\/
\n total 8
\n drwxr-xr-x 4 mongod mongod 4096 May 19 18:39 data
\n -r——– 1 mongod mongod 1024 May 19 18:29 mongokey<\/p>\n
\n #security:
\n security:
\n keyFile: \/mongodb\/mongokey<\/p>\n
\n replication:
\n oplogSizeMB: 1024
\n replSetName: rs0<\/p>\n
\n Stopping mongod: [ OK ]
\n Starting mongod: [ OK ]<\/p>\n
\n [root@node1 ~]# rsync -avH –progress ‘-e ssh -p 22’ \/etc\/hosts root@node2.rmohan.com:\/mongodb\/
\n [root@node1 ~]# rsync -avH –progress ‘-e ssh -p 22’ \/etc\/hosts root@node3.rmohan.com:\/mongodb\/<\/p>\n
\n [root@node1 ~]# rsync -avH –progress ‘-e ssh -p 22’ \/mongodb\/mongokey root@node3.rmohan.com:\/mongodb\/<\/p>\n
\n [root@node1 ~]# rsync -avH –progress ‘-e ssh -p 22’ \/etc\/mongod.conf root@node3.rmohan.com:\/etc\/<\/p>\n
\n > help
\n db.help() help on db methods
\n db.mycoll.help() help on collection methods
\n sh.help() sharding helpers
\n rs.help() replica set helpers
\n …..<\/p>\n
\n rs.status() { replSetGetStatus : 1 } checks repl set status
\n rs.initiate() { replSetInitiate : null } initiates set with default settings
\n rs.initiate(cfg) { replSetInitiate : cfg } initiates set with configuration cfg
\n rs.conf() get the current configuration object from local.system.replset
\n …..<\/p>\n
\n {
\n “info” : “run rs.initiate(…) if not yet done for the set”,
\n “ok” : 0,
\n “errmsg” : “no replset config has been received”,
\n “code” : 94,
\n “codeName” : “NotYetInitialized”
\n }<\/p>\n
\n {
\n “info2” : “no configuration specified. Using a default configuration for the set”,
\n “me” : “node1.rmohan.com:27017”,
\n “ok” : 1
\n }<\/p>\n
\n rs0:PRIMARY> rs.status()
\n {
\n “set” : “rs0”,
\n “date” : ISODate(“2017-05-18T17:00:49.868Z”),
\n “myState” : 1,
\n “term” : NumberLong(1),
\n “heartbeatIntervalMillis” : NumberLong(2000),
\n “optimes” : {
\n “lastCommittedOpTime” : {
\n “ts” : Timestamp(1495126845, 1),
\n “t” : NumberLong(1)
\n },
\n “appliedOpTime” : {
\n “ts” : Timestamp(1495126845, 1),
\n “t” : NumberLong(1)
\n },
\n “durableOpTime” : {
\n “ts” : Timestamp(1495126845, 1),
\n “t” : NumberLong(1)
\n }
\n },
\n “members” : [
\n {
\n “_id” : 0,
\n “name” : “node1.rmohan.com:27017”,
\n “health” : 1,
\n “state” : 1,
\n “stateStr” : “PRIMARY”,
\n “uptime” : 1239,
\n “optime” : {
\n “ts” : Timestamp(1495126845, 1),
\n “t” : NumberLong(1)
\n },
\n “optimeDate” : ISODate(“2017-05-18T17:00:45Z”),
\n “infoMessage” : “could not find member to sync from”,
\n “electionTime” : Timestamp(1495126824, 2),
\n “electionDate” : ISODate(“2017-05-18T17:00:24Z”),
\n “configVersion” : 1,
\n “self” : true
\n }
\n ],
\n “ok” : 1
\n }<\/p>\n
\n { “ok” : 1 }
\n rs0:PRIMARY> rs.add(“node3.rmohan.com”)
\n { “ok” : 1 }
\n rs0:PRIMARY> rs.status()
\n {
\n “set” : “rs0”,
\n “date” : ISODate(“2017-05-18T17:08:47.724Z”),
\n “myState” : 1,
\n “term” : NumberLong(1),
\n “heartbeatIntervalMillis” : NumberLong(2000),
\n “optimes” : {
\n “lastCommittedOpTime” : {
\n “ts” : Timestamp(1495127325, 1),
\n “t” : NumberLong(1)
\n },
\n “appliedOpTime” : {
\n “ts” : Timestamp(1495127325, 1),
\n “t” : NumberLong(1)
\n },
\n “durableOpTime” : {
\n “ts” : Timestamp(1495127325, 1),
\n “t” : NumberLong(1)
\n }
\n },
\n “members” : [
\n {
\n “_id” : 0,
\n “name” : “node1.rmohan.com:27017”,
\n “health” : 1, \/\/
\n “state” : 1, \/\/1???PRIMARY?slave
\n “stateStr” : “PRIMARY”, \/\/
\n “uptime” : 1717,
\n “optime” : {
\n “ts” : Timestamp(1495127325, 1),
\n “t” : NumberLong(1)
\n },
\n “optimeDate” : ISODate(“2017-05-18T17:08:45Z”),
\n “electionTime” : Timestamp(1495126824, 2),
\n “electionDate” : ISODate(“2017-05-18T17:00:24Z”),
\n “configVersion” : 3,
\n “self” : true
\n },
\n {
\n “_id” : 1,
\n “name” : “node2.rmohan.com:27017”,
\n “health” : 1,
\n “state” : 2,
\n “stateStr” : “SECONDARY”,
\n “uptime” : 64,
\n “optime” : {
\n “ts” : Timestamp(1495127325, 1),
\n “t” : NumberLong(1)
\n },
\n “optimeDurable” : {
\n “ts” : Timestamp(1495127325, 1),
\n “t” : NumberLong(1)
\n },
\n “optimeDate” : ISODate(“2017-05-18T17:08:45Z”),
\n “optimeDurableDate” : ISODate(“2017-05-18T17:08:45Z”),
\n “lastHeartbeat” : ISODate(“2017-05-18T17:08:46.106Z”),
\n “lastHeartbeatRecv” : ISODate(“2017-05-18T17:08:47.141Z”),
\n “pingMs” : NumberLong(0),
\n “syncingTo” : “node1.rmohan.com:27017”,
\n “configVersion” : 3
\n },
\n {
\n “_id” : 2,
\n “name” : “node3.rmohan.com:27017”,
\n “health” : 1,
\n “state” : 2,
\n “stateStr” : “SECONDARY”,
\n “uptime” : 55,
\n “optime” : {
\n “ts” : Timestamp(1495127325, 1),
\n “t” : NumberLong(1)
\n },
\n “optimeDurable” : {
\n “ts” : Timestamp(1495127325, 1),
\n “t” : NumberLong(1)
\n },
\n “optimeDate” : ISODate(“2017-05-18T17:08:45Z”),
\n “optimeDurableDate” : ISODate(“2017-05-18T17:08:45Z”),
\n “lastHeartbeat” : ISODate(“2017-05-18T17:08:46.195Z”),
\n “lastHeartbeatRecv” : ISODate(“2017-05-18T17:08:46.924Z”),
\n “pingMs” : NumberLong(0),
\n “syncingTo” : “node2.rmohan.com:27017”,
\n “configVersion” : 3
\n }
\n ],
\n “ok” : 1
\n }<\/p>\n
\n {
\n “hosts” : [
\n “node1.rmohan.com:27017”,
\n “node2.rmohan.com:27017”,
\n “node3.rmohan.com:27017”
\n ],
\n “setName” : “rs0”,
\n “setVersion” : 3,
\n “ismaster” : true,
\n “secondary” : false,
\n “primary” : “node1.rmohan.com:27017”,
\n “me” : “node1.rmohan.com:27017”,
\n “electionId” : ObjectId(“7fffffff0000000000000001”),
\n “lastWrite” : {
\n “opTime” : {
\n “ts” : Timestamp(1495127705, 1),
\n “t” : NumberLong(1)
\n },
\n “lastWriteDate” : ISODate(“2017-05-18T17:15:05Z”)
\n },
\n “maxBsonObjectSize” : 16777216,
\n “maxMessageSizeBytes” : 48000000,
\n “maxWriteBatchSize” : 1000,
\n “localTime” : ISODate(“2017-05-18T17:15:11.146Z”),
\n “maxWireVersion” : 5,
\n “minWireVersion” : 0,
\n “readOnly” : false,
\n “ok” : 1
\n }<\/p>\n
\n rs0:PRIMARY> show collections
\n testcoll
\n rs0:PRIMARY> db.testcoll.find()
\n { “_id” : ObjectId(“591dd9f965cc255a5373aefa”), “name” : “tom”, “age” : 25 }<\/p>\n
\n rs0:SECONDARY> rs.slaveOk()
\n rs0:SECONDARY> show dbs
\n admin 0.000GB
\n local 0.000GB
\n testdb 0.000GB
\n rs0:SECONDARY> use testdb
\n switched to db testdb
\n rs0:SECONDARY> show collections
\n testcoll
\n rs0:SECONDARY> db.testcoll.find()
\n { “_id” : ObjectId(“591dd9f965cc255a5373aefa”), “name” : “tom”, “age” : 25 }
\n rs0:SECONDARY> <\/p>\n
\n rs0:SECONDARY> show dbs
\n admin 0.000GB
\n local 0.000GB
\n testdb 0.000GB
\n rs0:SECONDARY> use testdb
\n switched to db testdb
\n rs0:SECONDARY> show collections
\n testcoll
\n rs0:SECONDARY> db.testcoll.find()
\n { “_id” : ObjectId(“591dd9f965cc255a5373aefa”), “name” : “tom”, “age” : 25 }
\n rs0:SECONDARY><\/p>\n
\n switched to db local
\n rs0:PRIMARY> show collections
\n me
\n oplog.rs
\n replset.election
\n replset.minvalid
\n startup_log
\n system.replset
\n rs0:PRIMARY> db.oplog.rs.find()
\n { “ts” : Timestamp(1495126824, 1), “h” : NumberLong(“3056083863196084673”), “v” : 2, “op” : “n”, “ns” : “”, “o” : { “msg” : “initiating set” } }
\n { “ts” : Timestamp(1495126825, 1), “t” : NumberLong(1), “h” : NumberLong(“7195178065440751511”), “v” : 2, “op” : “n”, “ns” : “”, “o” : { “msg” : “new primary” } }
\n { “ts” : Timestamp(1495126835, 1), “t” : NumberLong(1), “h” : NumberLong(“5723995478292318850”), “v” : 2, “op” : “n”, “ns” : “”, “o” : { “msg” : “periodic noop” } }
\n { “ts” : Timestamp(1495126845, 1), “t” : NumberLong(1), “h” : NumberLong(“-3772304067699003381”), “v” : 2, “op” : “n”, “ns” : “”, “o”<\/p>\n
\n configured oplog size: 1024MB
\n log length start to end: 2541secs (0.71hrs)
\n oplog first event time: Fri May 19 2017 01:00:24 GMT+0800 (CST)
\n oplog last event time: Fri May 19 2017 01:42:45 GMT+0800 (CST)
\n now: Fri May 19 2017 01:42:48 GMT+0800 (CST)
\n rs0:PRIMARY><\/p>\n
\n db.printReplicationInfo()?
\n db.printSlaveReplicationInfo()?<\/p>\n
\n source: node2.rmohan.com:27017
\n syncedTo: Fri May 19 2017 01:47:15 GMT+0800 (CST)
\n 0 secs (0 hrs) behind the primary
\n source: node3.rmohan.com:27017
\n syncedTo: Fri May 19 2017 01:47:15 GMT+0800 (CST)
\n 0 secs (0 hrs) behind the primary <\/p>\n
\n { “_id” : “rs0”, “version” : 3, “protocolVersion” : NumberLong(1), “members” : [ { “_id” : 0, “host” : “node1.rmohan.com:27017”, “arbiterOnly” : false, “buildIndexes” : true, “hidden” : false, “priority” : 1, “tags” : { }, “slaveDelay” : NumberLong(0), “votes” : 1 }, { “_id” : 1, “host” : “node2.rmohan.com:27017”, “arbiterOnly” : false, “buildIndexes” : true, “hidden” : false, “priority” : 1, “tags” : { }, “slaveDelay” : NumberLong(0), “votes” : 1 }, { “_id” : 2, “host” : “node3.rmohan.com:27017”, “arbiterOnly” : false, “buildIndexes” : true, “hidden” : false, “priority” : 1, “tags” : { }, “slaveDelay” : NumberLong(0), “votes” : 1 } ], “settings” : { “chainingAllowed” : true, “heartbeatIntervalMillis” : 2000, “heartbeatTimeoutSecs” : 10, “electionTimeoutMillis” : 10000, “catchUpTimeoutMillis” : 2000, “getLastErrorModes” : { }, “getLastErrorDefaults” : { “w” : 1, “wtimeout” : 0 }, “replicaSetId” : ObjectId(“591dd3284fc6957e660dc933”) } }<\/p>\n
\n { “ok” : 1 }<\/p>\n
\n rs0:PRIMARY> rs.stepDown(30)
\n 2017-05-19T02:09:27.945+0800 E QUERY [thread1] Error: error doing query: failed: network error while attempting to run command ‘replSetStepDown’ on host ‘127.0.0.1:27017’ :
\n DB.prototype.runCommand@src\/mongo\/shell\/db.js:132:1
\n DB.prototype.adminCommand@src\/mongo\/shell\/db.js:150:16
\n rs.stepDown@src\/mongo\/shell\/utils.js:1261:12
\n @(shell):1:1
\n 2017-05-19T02:09:27.947+0800 I NETWORK [thread1] trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed
\n 2017-05-19T02:09:27.949+0800 I NETWORK [thread1] reconnect 127.0.0.1:27017 (127.0.0.1) ok<\/p>\n
\n rs0:SECONDARY> rs.status()
\n {
\n “set” : “rs0”,
\n “date” : ISODate(“2017-05-18T18:12:09.732Z”),
\n “myState” : 2,
\n “term” : NumberLong(2),
\n “syncingTo” : “node2.rmohan.com:27017”,
\n “heartbeatIntervalMillis” : NumberLong(2000),
\n “optimes” : {
\n “lastCommittedOpTime” : {
\n “ts” : Timestamp(1495131128, 1),
\n “t” : NumberLong(2)
\n },
\n “appliedOpTime” : {
\n “ts” : Timestamp(1495131128, 1),
\n “t” : NumberLong(2)
\n },
\n “durableOpTime” : {
\n “ts” : Timestamp(1495131128, 1),
\n “t” : NumberLong(2)
\n }
\n },
\n “members” : [
\n {
\n “_id” : 0,
\n “name” : “node1.rmohan.com:27017”,
\n “health” : 1,
\n “state” : 2,
\n “stateStr” : “SECONDARY”,
\n “uptime” : 5519,
\n “optime” : {
\n “ts” : Timestamp(1495131128, 1),
\n “t” : NumberLong(2)
\n },
\n “optimeDate” : ISODate(“2017-05-18T18:12:08Z”),
\n “syncingTo” : “node2.rmohan.com:27017”,
\n “configVersion” : 3,
\n “self” : true
\n },
\n {
\n “_id” : 1,
\n “name” : “node2.rmohan.com:27017”,
\n “health” : 1,
\n “state” : 1,
\n “stateStr” : “PRIMARY”,
\n “uptime” : 3866,
\n “optime” : {
\n “ts” : Timestamp(1495131118, 1),
\n “t” : NumberLong(2)
\n },
\n “optimeDurable” : {
\n “ts” : Timestamp(1495131118, 1),
\n “t” : NumberLong(2)
\n },
\n “optimeDate” : ISODate(“2017-05-18T18:11:58Z”),
\n “optimeDurableDate” : ISODate(“2017-05-18T18:11:58Z”),
\n “lastHeartbeat” : ISODate(“2017-05-18T18:12:08.333Z”),
\n “lastHeartbeatRecv” : ISODate(“2017-05-18T18:12:08.196Z”),
\n “pingMs” : NumberLong(0),
\n “electionTime” : Timestamp(1495130977, 1),
\n “electionDate” : ISODate(“2017-05-18T18:09:37Z”),
\n “configVersion” : 3
\n },
\n {
\n “_id” : 2,
\n “name” : “node3.rmohan.com:27017”,
\n “health” : 1,
\n “state” : 2,
\n “stateStr” : “SECONDARY”,
\n “uptime” : 3857,
\n “optime” : {
\n “ts” : Timestamp(1495131118, 1),
\n “t” : NumberLong(2)
\n },
\n “optimeDurable” : {
\n “ts” : Timestamp(1495131118, 1),
\n “t” : NumberLong(2)
\n },
\n “optimeDate” : ISODate(“2017-05-18T18:11:58Z”),
\n “optimeDurableDate” : ISODate(“2017-05-18T18:11:58Z”),
\n “lastHeartbeat” : ISODate(“2017-05-18T18:12:08.486Z”),
\n “lastHeartbeatRecv” : ISODate(“2017-05-18T18:12:08.116Z”),
\n “pingMs” : NumberLong(0),
\n “syncingTo” : “node2.rmohan.com:27017”,
\n “configVersion” : 3
\n }
\n ],
\n “ok” : 1
\n }
\n rs0:SECONDARY><\/p>\n
\n { “ok” : 1 }<\/p>\n
\n {
\n “set” : “rs0”,
\n “date” : ISODate(“2017-05-19T12:12:57.697Z”),
\n “myState” : 1,
\n “term” : NumberLong(8),
\n “heartbeatIntervalMillis” : NumberLong(2000),
\n “optimes” : {
\n “lastCommittedOpTime” : {
\n “ts” : Timestamp(1495195971, 1),
\n “t” : NumberLong(8)
\n },
\n “appliedOpTime” : {
\n “ts” : Timestamp(1495195971, 1),
\n “t” : NumberLong(8)
\n },
\n “durableOpTime” : {
\n “ts” : Timestamp(1495195971, 1),
\n “t” : NumberLong(8)
\n }
\n },
\n “members” : [
\n {
\n “_id” : 0,
\n “name” : “node1.rmohan.com:27017”,
\n “health” : 1,
\n “state” : 2,
\n “stateStr” : “SECONDARY”,
\n “uptime” : 159,
\n “optime” : {
\n “ts” : Timestamp(1495195971, 1),
\n “t” : NumberLong(8)
\n },
\n “optimeDurable” : {
\n “ts” : Timestamp(1495195971, 1),
\n “t” : NumberLong(8)
\n },
\n “optimeDate” : ISODate(“2017-05-19T12:12:51Z”),
\n “optimeDurableDate” : ISODate(“2017-05-19T12:12:51Z”),
\n “lastHeartbeat” : ISODate(“2017-05-19T12:12:56.111Z”),
\n “lastHeartbeatRecv” : ISODate(“2017-05-19T12:12:57.101Z”),
\n “pingMs” : NumberLong(0),
\n “syncingTo” : “node3.rmohan.com:27017”,
\n “configVersion” : 4
\n },
\n {
\n “_id” : 1,
\n “name” : “node2.rmohan.com:27017”,
\n “health” : 1,
\n “state” : 2,
\n “stateStr” : “SECONDARY”,
\n “uptime” : 189,
\n “optime” : {
\n “ts” : Timestamp(1495195971, 1),
\n “t” : NumberLong(8)
\n },
\n “optimeDurable” : {
\n “ts” : Timestamp(1495195971, 1),
\n “t” : NumberLong(8)
\n },
\n “optimeDate” : ISODate(“2017-05-19T12:12:51Z”),
\n “optimeDurableDate” : ISODate(“2017-05-19T12:12:51Z”),
\n “lastHeartbeat” : ISODate(“2017-05-19T12:12:56.111Z”),
\n “lastHeartbeatRecv” : ISODate(“2017-05-19T12:12:57.103Z”),
\n “pingMs” : NumberLong(0),
\n “syncingTo” : “node3.rmohan.com:27017”,
\n “configVersion” : 4
\n },
\n {
\n “_id” : 2,
\n “name” : “node3.rmohan.com:27017”,
\n “health” : 1,
\n “state” : 1,
\n “stateStr” : “PRIMARY”,
\n “uptime” : 191,
\n “optime” : {
\n “ts” : Timestamp(1495195971, 1),
\n “t” : NumberLong(8)
\n },
\n “optimeDate” : ISODate(“2017-05-19T12:12:51Z”),
\n “electionTime” : Timestamp(1495195800, 1),
\n “electionDate” : ISODate(“2017-05-19T12:10:00Z”),
\n “configVersion” : 4,
\n “self” : true
\n },
\n {
\n “_id” : 3,
\n “name” : “node4.rmohan.com:27017”,
\n “health” : 1,
\n “state” : 2,
\n “stateStr” : “SECONDARY”,
\n “uptime” : 71,
\n “optime” : {
\n “ts” : Timestamp(1495195971, 1),
\n “t” : NumberLong(8)
\n },
\n “optimeDurable” : {
\n “ts” : Timestamp(1495195971, 1),
\n “t” : NumberLong(8)
\n },
\n “optimeDate” : ISODate(“2017-05-19T12:12:51Z”),
\n “optimeDurableDate” : ISODate(“2017-05-19T12:12:51Z”),
\n “lastHeartbeat” : ISODate(“2017-05-19T12:12:56.122Z”),
\n “lastHeartbeatRecv” : ISODate(“2017-05-19T12:12:56.821Z”),
\n “pingMs” : NumberLong(1),
\n “syncingTo” : “node3.rmohan.com:27017”,
\n “configVersion” : 4
\n }
\n ],
\n “ok” : 1
\n }<\/p>\n
\n rs0:SECONDARY> show dbs
\n admin 0.000GB
\n local 0.000GB
\n testdb 0.000GB
\n rs0:SECONDARY> use testdb
\n switched to db testdb
\n rs0:SECONDARY> show collections
\n testcoll
\n rs0:SECONDARY> db.testcoll.find()
\n { “_id” : ObjectId(“591dd9f965cc255a5373aefa”), “name” : “tom”, “age” : 25 }
\n rs0:SECONDARY>
\n rs0:SECONDARY> db.isMaster()
\n {
\n “hosts” : [
\n “node1.rmohan.com:27017”,
\n “node2.rmohan.com:27017”,
\n “node3.rmohan.com:27017”,
\n “node4.rmohan.com:27017”
\n ],
\n “setName” : “rs0”,
\n “setVersion” : 4,
\n “ismaster” : false,
\n “secondary” : true,
\n “primary” : “node3.rmohan.com:27017”,
\n “me” : “node4.rmohan.com:27017”,
\n “lastWrite” : {
\n “opTime” : {
\n “ts” : Timestamp(1495196261, 1),
\n “t” : NumberLong(8)
\n },
\n “lastWriteDate” : ISODate(“2017-05-19T12:17:41Z”)
\n },
\n “maxBsonObjectSize” : 16777216,
\n “maxMessageSizeBytes” : 48000000,
\n “maxWriteBatchSize” : 1000,
\n “localTime” : ISODate(“2017-05-19T12:17:44.104Z”),
\n “maxWireVersion” : 5,
\n “minWireVersion” : 0,
\n “readOnly” : false,
\n “ok” : 1
\n }
\n rs0:SECONDARY><\/p>\n
\n { “ok” : 1 }<\/p>\n
\n {
\n “hosts” : [
\n “node1.rmohan.com:27017”,
\n “node2.rmohan.com:27017”,
\n “node3.rmohan.com:27017”
\n ],
\n “setName” : “rs0”,
\n “setVersion” : 5,
\n “ismaster” : true,
\n “secondary” : false,
\n “primary” : “node3.rmohan.com:27017”,
\n “me” : “node3.rmohan.com:27017”,
\n “electionId” : ObjectId(“7fffffff0000000000000008”),
\n “lastWrite” : {
\n “opTime” : {
\n “ts” : Timestamp(1495196531, 1),
\n “t” : NumberLong(8)
\n },
\n “lastWriteDate” : ISODate(“2017-05-19T12:22:11Z”)
\n },
\n “maxBsonObjectSize” : 16777216,
\n “maxMessageSizeBytes” : 48000000,
\n “maxWriteBatchSize” : 1000,
\n “localTime” : ISODate(“2017-05-19T12:22:19.874Z”),
\n “maxWireVersion” : 5,
\n “minWireVersion” : 0,
\n “readOnly” : false,
\n “ok” : 1
\n }
\n rs0:PRIMARY><\/p>\n","protected":false},"excerpt":{"rendered":"