MongoDB 高可用可用分兩種 ：

為瀏陽等地區(qū)用戶提供了全套網(wǎng)頁設計制作服務，及瀏陽網(wǎng)站建設行業(yè)解決方案。主營業(yè)務為網(wǎng)站建設、網(wǎng)站設計、瀏陽網(wǎng)站設計，以傳統(tǒng)方式定制建設網(wǎng)站，并提供域名空間備案等一條龍服務，秉承以專業(yè)、用心的態(tài)度為用戶提供真誠的服務。我們深信只要達到每一位用戶的要求，就會得到認可，從而選擇與我們長期合作。這樣，我們也可以走得更遠！

Master-Slave 主從復制 ：只需要在某一個服務啟動時加上–master 參數(shù), 而另一個服務加上–slave 與–source 參數(shù), 即可實現(xiàn)同步。

MongoDB的最新版本已不再推薦此方案。

Replica Sets 復制集 ：MongoDB 在 1.6 版本對開發(fā)了新功能 replica set,這比之前的 replication 功能要強大一 些,增加了故障自動切換

和自動修復成員節(jié)點,各個 DB 之間數(shù)據(jù)完全一致,大大降低了維 護成功。auto shard 已經明確說明不支持 replication paris,建議使用

replica set,replica set 故障切換完全自動。

Replica Sets 的結構非常類似一個集群 ，其中一個節(jié)點如果出現(xiàn)故障, 其它節(jié)點馬上會將業(yè)務 接過來而無須停機操作。

     

            192.168.110.131(node1)

            192.168.110.132(node2)

            192.168.110.133(node3)

  官方文檔：

   http://docs.mongoing.com/manual-zh/

  部署復制集：

   http://docs.mongoing.com/manual-zh/tutorial/deploy-replica-set.html

一、MongoDB安裝

  [root@node1 ~]# vim /etc/yum.repos.d/Mongodb.repo

  [mongodb-org-3.4]

name=MongoDB Repository

baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.4/x86_64/

gpgcheck=1

enabled=1

gpgkey=https://www.mongodb.org/static/pgp/server-3.4.asc

  [root@node1 ~]# yum install -y mongodb-org

  [root@node1 ~]# service mongod start

Starting mongod:                      [  OK  ]

  [root@node1 ~]# ps aux|grep mong

mongod   1361  5.7 14.8 351180 35104 ?     Sl  01:26  0:01 /usr/bin/mongod -f /etc/mongod.conf

更改數(shù)據(jù)存放目錄：

  [root@node1 ~]# mkdir -p /mongodb/data

[root@node1 ~]# chown -R mongod:mongod /mongodb/

[root@node1 ~]# ll /mongodb/

total 4

drwxr-xr-x 2 mongod mongod 4096 May 18 02:04 data

  [root@node1 ~]# grep -v "^#" /etc/mongod.conf |grep -v "^$"

systemLog:

 destination: file

 logAppend: true

 path: /var/log/mongodb/mongod.log

storage:

 dbPath: /mongodb/data

 journal:

  enabled: true

processManagement:

 fork: true  # fork and run in background

 pidFilePath: /var/run/mongodb/mongod.pid  # location of pidfile

net:

 port: 27017

 bindIp: 0.0.0.0 # Listen to local interface only, comment to listen on all interfaces.

  [root@node1 ~]# service mongod start

Starting mongod:                      [  OK  ]

  node2，node2與上面一樣

二、配置 Replication Sets

  介紹一下涉及到的參數(shù)

--oplogSize 日志操作文件的大小

--dbpath  數(shù)據(jù)文件路徑

--logpath  日志文件路徑

--port     端口號，默認是27017.我這里使用的也是這個端口號.

--replSet  復制集的名字，一個replica sets中的每個節(jié)點的這個參數(shù)都要用一個復制集名字，這里是test.

--replSet test/  這個后面跟的是其他standard節(jié)點的ip和端口

--maxConns  大連接數(shù)

--fork    后臺運行

--logappend  日志文件循環(huán)使用，如果日志文件已滿，那么新日志覆蓋最久日志。

--keyFile    標識同一集群的認證私鑰

其中在啟動節(jié)點時一定要加上oplogSize 的參數(shù) 為其設置大小，不然在64位操作系統(tǒng)上的mongodb,oplogs都相當大-可能是5%的磁盤空間。

要根據(jù)情況設置個合理的值。

  v3.4.4上的參數(shù)：

  [root@node1 ~]# vim /etc/mongod.conf

replication:

   oplogSizeMB: 1024

   replSetName: rs0

  使用Keyfile存取控制部署復制集：

  openssl rand -base64 756 > <path-to-keyfile>

chmod 400 <path-to-keyfile>

Configuration File

If using a configuration file, set the security.keyFile option to the keyfile’s path, and the replication.replSetName option to the replica set name:

security:

 keyFile: <path-to-keyfile>

replication:

 replSetName: <replicaSetName>

Command Line

If using the command line option, start the mongod with the --keyFile and --replSet parameters:

mongod --keyFile <path-to-keyfile> --replSet <replicaSetName>

  配置帶密鑰文件的 Replication Sets：

  [root@node1 ~]# openssl rand -base64 756 > /mongodb/mongokey

  [root@node1 ~]# cat /mongodb/mongokey

gxpcgjyFj2qE8b9TB/0XbdRVYH9VDb55NY03AHwxCFU58MUjJMeez844i1gaUo/t

.....

.....

  [root@node1 ~]# chmod 400 /mongodb/mongokey

[root@node1 ~]# chown mongod:mongod /mongodb/mongokey

[root@node1 ~]# ll /mongodb/

total 8

drwxr-xr-x 4 mongod mongod 4096 May 19 18:39 data

-r-------- 1 mongod mongod 1024 May 19 18:29 mongokey

  [root@node1 ~]# vim /etc/mongod.conf

  #security:

security:

 keyFile: /mongodb/mongokey

#operationProfiling:

#replication:

replication:

 oplogSizeMB: 1024

 replSetName: rs0

  [root@node1 ~]# service mongod restart

Stopping mongod:                      [  OK  ]

Starting mongod:                      [  OK  ]

  [root@node1 ~]# iptables -I INPUT 4 -m state --state NEW -p tcp --dport 27017  -j ACCEPT

  復制hosts文件：

  [root@node1 ~]# rsync -avH --progress '-e ssh -p 22' /etc/hosts root@node2.pancou.com:/mongodb/

  [root@node1 ~]# rsync -avH --progress '-e ssh -p 22' /etc/hosts root@node3.pancou.com:/mongodb/

  復制密鑰文件：

  [root@node1 ~]# rsync -avH --progress '-e ssh -p 22' /mongodb/mongokey root@node3.pancou.com:/mongodb/

  [root@node1 ~]# rsync -avH --progress '-e ssh -p 22' /mongodb/mongokey root@node3.pancou.com:/mongodb/

  復制配置文件：

  [root@node1 ~]# rsync -avH --progress '-e ssh -p 22' /etc/mongod.conf root@node2.pancou.com:/etc/

  [root@node1 ~]# rsync -avH --progress '-e ssh -p 22' /etc/mongod.conf root@node3.pancou.com:/etc/

  注意:雙方都要按照rsync和openssh-clients

  [root@node1 ~]# mongo

  > help

db.help()           help on db methods

db.mycoll.help()       help on collection methods

sh.help()           sharding helpers

rs.help()           replica set helpers

  .....

  > rs.help()

  rs.status()                 { replSetGetStatus : 1 } checks repl set status

rs.initiate()                { replSetInitiate : null } initiates set with default settings

rs.initiate(cfg)              { replSetInitiate : cfg } initiates set with configuration cfg

rs.conf()                  get the current configuration object from local.system.replset

  .....

  > rs.status()

{

"info" : "run rs.initiate(...) if not yet done for the set",

"ok" : 0,

"errmsg" : "no replset config has been received",

"code" : 94,

"codeName" : "NotYetInitialized"

  }

  > rs.initiate()

{

"info2" : "no configuration specified. Using a default configuration for the set",

"me" : "node1.pancou.com:27017",

"ok" : 1

}

  rs0:OTHER>

rs0:PRIMARY> rs.status()

{

"set" : "rs0",

"date" : ISODate("2017-05-18T17:00:49.868Z"),

"myState" : 1,

"term" : NumberLong(1),

"heartbeatIntervalMillis" : NumberLong(2000),

"optimes" : {

"lastCommittedOpTime" : {

"ts" : Timestamp(1495126845, 1),

"t" : NumberLong(1)

},

"appliedOpTime" : {

"ts" : Timestamp(1495126845, 1),

"t" : NumberLong(1)

},

"durableOpTime" : {

"ts" : Timestamp(1495126845, 1),

"t" : NumberLong(1)

}

},

"members" : [

{

"_id" : 0,

"name" : "node1.pancou.com:27017",

"health" : 1,

"state" : 1,

"stateStr" : "PRIMARY",

"uptime" : 1239,

"optime" : {

"ts" : Timestamp(1495126845, 1),

"t" : NumberLong(1)

},

"optimeDate" : ISODate("2017-05-18T17:00:45Z"),

"infoMessage" : "could not find member to sync from",

"electionTime" : Timestamp(1495126824, 2),

"electionDate" : ISODate("2017-05-18T17:00:24Z"),

"configVersion" : 1,

"self" : true

}

],

"ok" : 1

}

  rs0:PRIMARY> rs.add("node2.pancou.com")

{ "ok" : 1 }

rs0:PRIMARY> rs.add("node3.pancou.com")

{ "ok" : 1 }

  rs0:PRIMARY> rs.status()

{

"set" : "rs0",

"date" : ISODate("2017-05-18T17:08:47.724Z"),

"myState" : 1,

"term" : NumberLong(1),

"heartbeatIntervalMillis" : NumberLong(2000),

"optimes" : {

"lastCommittedOpTime" : {

"ts" : Timestamp(1495127325, 1),

"t" : NumberLong(1)

},

"appliedOpTime" : {

"ts" : Timestamp(1495127325, 1),

"t" : NumberLong(1)

},

"durableOpTime" : {

"ts" : Timestamp(1495127325, 1),

"t" : NumberLong(1)

}

},

"members" : [

{

"_id" : 0,

"name" : "node1.pancou.com:27017",

"health" : 1,        //表明狀態(tài)正常

"state" : 1,        //1表示是PRIMARY，2表示是slave

"stateStr" : "PRIMARY",   //表示此機器是主庫

"uptime" : 1717,

"optime" : {

"ts" : Timestamp(1495127325, 1),

"t" : NumberLong(1)

},

"optimeDate" : ISODate("2017-05-18T17:08:45Z"),

"electionTime" : Timestamp(1495126824, 2),

"electionDate" : ISODate("2017-05-18T17:00:24Z"),

"configVersion" : 3,

"self" : true

},

{

"_id" : 1,

"name" : "node2.pancou.com:27017",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 64,

"optime" : {

"ts" : Timestamp(1495127325, 1),

"t" : NumberLong(1)

},

"optimeDurable" : {

"ts" : Timestamp(1495127325, 1),

"t" : NumberLong(1)

},

"optimeDate" : ISODate("2017-05-18T17:08:45Z"),

"optimeDurableDate" : ISODate("2017-05-18T17:08:45Z"),

"lastHeartbeat" : ISODate("2017-05-18T17:08:46.106Z"),

"lastHeartbeatRecv" : ISODate("2017-05-18T17:08:47.141Z"),

"pingMs" : NumberLong(0),

"syncingTo" : "node1.pancou.com:27017",

"configVersion" : 3

},

{

"_id" : 2,

"name" : "node3.pancou.com:27017",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 55,

"optime" : {

"ts" : Timestamp(1495127325, 1),

"t" : NumberLong(1)

},

"optimeDurable" : {

"ts" : Timestamp(1495127325, 1),

"t" : NumberLong(1)

},

"optimeDate" : ISODate("2017-05-18T17:08:45Z"),

"optimeDurableDate" : ISODate("2017-05-18T17:08:45Z"),

"lastHeartbeat" : ISODate("2017-05-18T17:08:46.195Z"),

"lastHeartbeatRecv" : ISODate("2017-05-18T17:08:46.924Z"),

"pingMs" : NumberLong(0),

"syncingTo" : "node2.pancou.com:27017",

"configVersion" : 3

}

],

"ok" : 1

}

  rs0:PRIMARY> db.isMaster()

{

"hosts" : [

"node1.pancou.com:27017",

"node2.pancou.com:27017",

"node3.pancou.com:27017"

],

"setName" : "rs0",

"setVersion" : 3,

"ismaster" : true,

"secondary" : false,

"primary" : "node1.pancou.com:27017",

"me" : "node1.pancou.com:27017",

"electionId" : ObjectId("7fffffff0000000000000001"),

"lastWrite" : {

"opTime" : {

"ts" : Timestamp(1495127705, 1),

"t" : NumberLong(1)

},

"lastWriteDate" : ISODate("2017-05-18T17:15:05Z")

},

"maxBsonObjectSize" : 16777216,

"maxMessageSizeBytes" : 48000000,

"maxWriteBatchSize" : 1000,

"localTime" : ISODate("2017-05-18T17:15:11.146Z"),

"maxWireVersion" : 5,

"minWireVersion" : 0,

"readOnly" : false,

"ok" : 1

}

  rs0:PRIMARY> use testdb

  rs0:PRIMARY> show collections

testcoll

rs0:PRIMARY> db.testcoll.find()

{ "_id" : ObjectId("591dd9f965cc255a5373aefa"), "name" : "tom", "age" : 25 }

  到從庫上查看：

  node2:

  rs0:SECONDARY> rs.slaveOk()

rs0:SECONDARY> show dbs

admin  0.000GB

local  0.000GB

testdb  0.000GB

rs0:SECONDARY> use testdb

switched to db testdb

rs0:SECONDARY> show collections

testcoll

rs0:SECONDARY> db.testcoll.find()

{ "_id" : ObjectId("591dd9f965cc255a5373aefa"), "name" : "tom", "age" : 25 }

rs0:SECONDARY>

  node3:

  rs0:SECONDARY> rs.slaveOk()

rs0:SECONDARY> show dbs

admin  0.000GB

local  0.000GB

testdb  0.000GB

rs0:SECONDARY> use testdb

switched to db testdb

rs0:SECONDARY> show collections

testcoll

rs0:SECONDARY> db.testcoll.find()

{ "_id" : ObjectId("591dd9f965cc255a5373aefa"), "name" : "tom", "age" : 25 }

rs0:SECONDARY>

  主從操作日志

  rs0:PRIMARY> use local

switched to db local

rs0:PRIMARY> show collections

me

oplog.rs

replset.election

replset.minvalid

startup_log

system.replset

rs0:PRIMARY> db.oplog.rs.find()

{ "ts" : Timestamp(1495126824, 1), "h" : NumberLong("3056083863196084673"), "v" : 2, "op" : "n", "ns" : "", "o" : { "msg" : "initiating set" } }

{ "ts" : Timestamp(1495126825, 1), "t" : NumberLong(1), "h" : NumberLong("7195178065440751511"), "v" : 2, "op" : "n", "ns" : "", "o" : { "msg" : "new primary" } }

{ "ts" : Timestamp(1495126835, 1), "t" : NumberLong(1), "h" : NumberLong("5723995478292318850"), "v" : 2, "op" : "n", "ns" : "", "o" : { "msg" : "periodic noop" } }

{ "ts" : Timestamp(1495126845, 1), "t" : NumberLong(1), "h" : NumberLong("-3772304067699003381"), "v" : 2, "op" : "n", "ns" : "", "o"

三、查看配置信息

  rs0:PRIMARY> db.printReplicationInfo()

configured oplog size:  1024MB

log length start to end: 2541secs (0.71hrs)

oplog first event time:  Fri May 19 2017 01:00:24 GMT+0800 (CST)

oplog last event time:  Fri May 19 2017 01:42:45 GMT+0800 (CST)

now:           Fri May 19 2017 01:42:48 GMT+0800 (CST)

rs0:PRIMARY>

db.oplog.rs.find()：查看復制集產生的日志

db.printReplicationInfo()：查看操作日志的一些基本信息，如日志大小、日志啟用時間。

  db.printSlaveReplicationInfo()：查看所有slave延遲情況。

rs0:PRIMARY> db.printSlaveReplicationInfo()

source: node2.pancou.com:27017

syncedTo: Fri May 19 2017 01:47:15 GMT+0800 (CST)

0 secs (0 hrs) behind the primary

source: node3.pancou.com:27017

syncedTo: Fri May 19 2017 01:47:15 GMT+0800 (CST)

0 secs (0 hrs) behind the primary

  db.system.replset.find()：查看復制集

  配置信息：

  rs0:PRIMARY> db.system.replset.find()

{ "_id" : "rs0", "version" : 3, "protocolVersion" : NumberLong(1), "members" : [ { "_id" : 0, "host" : "node1.pancou.com:27017", "arbiterOnly" : false, "buildIndexes" : true, "hidden" : false, "priority" : 1, "tags" : {  }, "slaveDelay" : NumberLong(0), "votes" : 1 }, { "_id" : 1, "host" : "node2.pancou.com:27017", "arbiterOnly" : false, "buildIndexes" : true, "hidden" : false, "priority" : 1, "tags" : {  }, "slaveDelay" : NumberLong(0), "votes" : 1 }, { "_id" : 2, "host" : "node3.pancou.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") } }

  rs0:PRIMARY> db.system.replset.find().forEach(printjson)  這種方式更直觀

四、主從切換：

  1、把node3冰凍30秒

  rs0:SECONDARY> rs.freeze(30)

  { "ok" : 1 }

  2、把node1 PRIMARY降級、

  rs0:PRIMARY> rs.stepDown(30)

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'  :

DB.prototype.runCommand@src/mongo/shell/db.js:132:1

DB.prototype.adminCommand@src/mongo/shell/db.js:150:16

rs.stepDown@src/mongo/shell/utils.js:1261:12

@(shell):1:1

2017-05-19T02:09:27.947+0800 I NETWORK  [thread1] trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed

2017-05-19T02:09:27.949+0800 I NETWORK  [thread1] reconnect 127.0.0.1:27017 (127.0.0.1) ok

  30秒后就變成從了

rs0:SECONDARY> rs.status()

{

"set" : "rs0",

"date" : ISODate("2017-05-18T18:12:09.732Z"),

"myState" : 2,

"term" : NumberLong(2),

"syncingTo" : "node2.pancou.com:27017",

"heartbeatIntervalMillis" : NumberLong(2000),

"optimes" : {

"lastCommittedOpTime" : {

"ts" : Timestamp(1495131128, 1),

"t" : NumberLong(2)

},

"appliedOpTime" : {

"ts" : Timestamp(1495131128, 1),

"t" : NumberLong(2)

},

"durableOpTime" : {

"ts" : Timestamp(1495131128, 1),

"t" : NumberLong(2)

}

},

"members" : [

{

"_id" : 0,

"name" : "node1.pancou.com:27017",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 5519,

"optime" : {

"ts" : Timestamp(1495131128, 1),

"t" : NumberLong(2)

},

"optimeDate" : ISODate("2017-05-18T18:12:08Z"),

"syncingTo" : "node2.pancou.com:27017",

"configVersion" : 3,

"self" : true

},

{

"_id" : 1,

"name" : "node2.pancou.com:27017",

"health" : 1,

"state" : 1,

"stateStr" : "PRIMARY",

"uptime" : 3866,

"optime" : {

"ts" : Timestamp(1495131118, 1),

"t" : NumberLong(2)

},

"optimeDurable" : {

"ts" : Timestamp(1495131118, 1),

"t" : NumberLong(2)

},

"optimeDate" : ISODate("2017-05-18T18:11:58Z"),

"optimeDurableDate" : ISODate("2017-05-18T18:11:58Z"),

"lastHeartbeat" : ISODate("2017-05-18T18:12:08.333Z"),

"lastHeartbeatRecv" : ISODate("2017-05-18T18:12:08.196Z"),

"pingMs" : NumberLong(0),

"electionTime" : Timestamp(1495130977, 1),

"electionDate" : ISODate("2017-05-18T18:09:37Z"),

"configVersion" : 3

},

{

"_id" : 2,

"name" : "node3.pancou.com:27017",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 3857,

"optime" : {

"ts" : Timestamp(1495131118, 1),

"t" : NumberLong(2)

},

"optimeDurable" : {

"ts" : Timestamp(1495131118, 1),

"t" : NumberLong(2)

},

"optimeDate" : ISODate("2017-05-18T18:11:58Z"),

"optimeDurableDate" : ISODate("2017-05-18T18:11:58Z"),

"lastHeartbeat" : ISODate("2017-05-18T18:12:08.486Z"),

"lastHeartbeatRecv" : ISODate("2017-05-18T18:12:08.116Z"),

"pingMs" : NumberLong(0),

"syncingTo" : "node2.pancou.com:27017",

"configVersion" : 3

}

],

"ok" : 1

}

rs0:SECONDARY>

五、增減節(jié)點

  1、增加節(jié)點

    通過oplog增加節(jié)點，這種方式使數(shù)據(jù)的同步完全依賴于oplog,即oplog中有多少操作日志，這些操作日志就完全在新添加的節(jié)點中執(zhí)行一遍，以完成同步。

    在上面有一個3節(jié)點的復制集基礎上，現(xiàn)在想配置并啟動一個新節(jié)點，將其加入現(xiàn)在復制集環(huán)境中。

    [root@node1 ~]# rsync -avH --progress '-e ssh -p 22' /etc/hosts root@node2.pancou.com:/etc/

    [root@node1 ~]# rsync -avH --progress '-e ssh -p 22' /mongodb/mongokey root@node4.pancou.com:/mongodb/

    [root@node1 ~]# rsync -avH --progress '-e ssh -p 22' /etc/mongod.conf root@node4.pancou.com:/etc/

    [root@node4 ~]# iptables -I INPUT 4 -m state --state NEW -p tcp --dport 27017  -j ACCEPT

    在主上添加新節(jié)點：

    rs0:PRIMARY> rs.add("node4.pancou.com")

{ "ok" : 1 }

    rs0:PRIMARY> rs.status()

{

"set" : "rs0",

"date" : ISODate("2017-05-19T12:12:57.697Z"),

"myState" : 1,

"term" : NumberLong(8),

"heartbeatIntervalMillis" : NumberLong(2000),

"optimes" : {

"lastCommittedOpTime" : {

"ts" : Timestamp(1495195971, 1),

"t" : NumberLong(8)

},

"appliedOpTime" : {

"ts" : Timestamp(1495195971, 1),

"t" : NumberLong(8)

},

"durableOpTime" : {

"ts" : Timestamp(1495195971, 1),

"t" : NumberLong(8)

}

},

"members" : [

{

"_id" : 0,

"name" : "node1.pancou.com:27017",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 159,

"optime" : {

"ts" : Timestamp(1495195971, 1),

"t" : NumberLong(8)

},

"optimeDurable" : {

"ts" : Timestamp(1495195971, 1),

"t" : NumberLong(8)

},

"optimeDate" : ISODate("2017-05-19T12:12:51Z"),

"optimeDurableDate" : ISODate("2017-05-19T12:12:51Z"),

"lastHeartbeat" : ISODate("2017-05-19T12:12:56.111Z"),

"lastHeartbeatRecv" : ISODate("2017-05-19T12:12:57.101Z"),

"pingMs" : NumberLong(0),

"syncingTo" : "node3.pancou.com:27017",

"configVersion" : 4

},

{

"_id" : 1,

"name" : "node2.pancou.com:27017",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 189,

"optime" : {

"ts" : Timestamp(1495195971, 1),

"t" : NumberLong(8)

},

"optimeDurable" : {

"ts" : Timestamp(1495195971, 1),

"t" : NumberLong(8)

},

"optimeDate" : ISODate("2017-05-19T12:12:51Z"),

"optimeDurableDate" : ISODate("2017-05-19T12:12:51Z"),

"lastHeartbeat" : ISODate("2017-05-19T12:12:56.111Z"),

"lastHeartbeatRecv" : ISODate("2017-05-19T12:12:57.103Z"),

"pingMs" : NumberLong(0),

"syncingTo" : "node3.pancou.com:27017",

"configVersion" : 4

},

{

"_id" : 2,

"name" : "node3.pancou.com:27017",

"health" : 1,

"state" : 1,

"stateStr" : "PRIMARY",

"uptime" : 191,

"optime" : {

"ts" : Timestamp(1495195971, 1),

"t" : NumberLong(8)

},

"optimeDate" : ISODate("2017-05-19T12:12:51Z"),

"electionTime" : Timestamp(1495195800, 1),

"electionDate" : ISODate("2017-05-19T12:10:00Z"),

"configVersion" : 4,

"self" : true

},

{

"_id" : 3,

"name" : "node4.pancou.com:27017",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 71,

"optime" : {

"ts" : Timestamp(1495195971, 1),

"t" : NumberLong(8)

},

"optimeDurable" : {

"ts" : Timestamp(1495195971, 1),

"t" : NumberLong(8)

},

"optimeDate" : ISODate("2017-05-19T12:12:51Z"),

"optimeDurableDate" : ISODate("2017-05-19T12:12:51Z"),

"lastHeartbeat" : ISODate("2017-05-19T12:12:56.122Z"),

"lastHeartbeatRecv" : ISODate("2017-05-19T12:12:56.821Z"),

"pingMs" : NumberLong(1),

"syncingTo" : "node3.pancou.com:27017",

"configVersion" : 4

}

],

"ok" : 1

}

查看狀態(tài)：

rs0:SECONDARY> rs.slaveOk()

rs0:SECONDARY> show dbs

admin  0.000GB

local  0.000GB

testdb  0.000GB

rs0:SECONDARY> use testdb

switched to db testdb

rs0:SECONDARY> show collections

testcoll

rs0:SECONDARY> db.testcoll.find()

{ "_id" : ObjectId("591dd9f965cc255a5373aefa"), "name" : "tom", "age" : 25 }

rs0:SECONDARY>

rs0:SECONDARY> db.isMaster()

{

"hosts" : [

"node1.pancou.com:27017",

"node2.pancou.com:27017",

"node3.pancou.com:27017",

"node4.pancou.com:27017"

],

"setName" : "rs0",

"setVersion" : 4,

"ismaster" : false,

"secondary" : true,

"primary" : "node3.pancou.com:27017",

"me" : "node4.pancou.com:27017",

"lastWrite" : {

"opTime" : {

"ts" : Timestamp(1495196261, 1),

"t" : NumberLong(8)

},

"lastWriteDate" : ISODate("2017-05-19T12:17:41Z")

},

"maxBsonObjectSize" : 16777216,

"maxMessageSizeBytes" : 48000000,

"maxWriteBatchSize" : 1000,

"localTime" : ISODate("2017-05-19T12:17:44.104Z"),

"maxWireVersion" : 5,

"minWireVersion" : 0,

"readOnly" : false,

"ok" : 1

}

rs0:SECONDARY>

   2、減少節(jié)點

    rs0:PRIMARY> rs.remove("node4.pancou.com:27017")

{ "ok" : 1 }

    rs0:PRIMARY> db.isMaster()

{

"hosts" : [

"node1.pancou.com:27017",

"node2.pancou.com:27017",

"node3.pancou.com:27017"

],

"setName" : "rs0",

"setVersion" : 5,

"ismaster" : true,

"secondary" : false,

"primary" : "node3.pancou.com:27017",

"me" : "node3.pancou.com:27017",

"electionId" : ObjectId("7fffffff0000000000000008"),

"lastWrite" : {

"opTime" : {

"ts" : Timestamp(1495196531, 1),

"t" : NumberLong(8)

},

"lastWriteDate" : ISODate("2017-05-19T12:22:11Z")

},

"maxBsonObjectSize" : 16777216,

"maxMessageSizeBytes" : 48000000,

"maxWriteBatchSize" : 1000,

"localTime" : ISODate("2017-05-19T12:22:19.874Z"),

"maxWireVersion" : 5,

"minWireVersion" : 0,

"readOnly" : false,

"ok" : 1

}

rs0:PRIMARY>

另外有需要云服務器可以了解下創(chuàng)新互聯(lián)cdcxhl.cn，海內外云服務器15元起步，三天無理由+7*72小時售后在線，公司持有idc許可證，提供“云服務器、裸金屬服務器、高防服務器、香港服務器、美國服務器、虛擬主機、免備案服務器”等云主機租用服務以及企業(yè)上云的綜合解決方案，具有“安全穩(wěn)定、簡單易用、服務可用性高、性價比高”等特點與優(yōu)勢，專為企業(yè)上云打造定制，能夠滿足用戶豐富、多元化的應用場景需求。

分享文章：MongoDB設置ReplicationSets-創(chuàng)新互聯(lián)
鏈接分享：http://aaarwkj.com/article16/cogidg.html

成都網(wǎng)站建設公司_創(chuàng)新互聯(lián)，為您提供自適應網(wǎng)站、定制開發(fā)、軟件開發(fā)、營銷型網(wǎng)站建設、定制網(wǎng)站、面包屑導航

廣告

聲明：本網(wǎng)站發(fā)布的內容（圖片、視頻和文字）以用戶投稿、用戶轉載內容為主，如果涉及侵權請盡快告知，我們將會在第一時間刪除。文章觀點不代表本網(wǎng)站立場，如需處理請聯(lián)系客服。電話：028-86922220；郵箱：631063699@qq.com。內容未經允許不得轉載，或轉載時需注明來源： 創(chuàng)新互聯(lián)