環境

172.16.115.202 ? primary

172.16.111.171 ? secondary

172.16.115.157 ? secondary

一、MongoDB安裝

1. yum下載安裝mongodb

? ? ?擴展源http://repo.mongodb.org/yum/redhat/mongodb-org-3.0.repo

? ? ?mongodb-org-3.0.7-1.el6.x86_64.rpm #元數據包，它可以實現自動安裝下面的4個組件包

? ? ?mongodb-org-mongos-3.0.7-1.el6.x86_64.rpm #?mongod守護程序，以及相關的配置和初始化腳本

? ? ?mongodb-org-server-3.0.7-1.el6.x86_64.rpm #?mongos守護程序

? ? ?mongodb-org-shell-3.0.7-1.el6.x86_64.rpm #?ongo shell環境

? ? ?mongodb-org-tools-3.0.7-1.el6.x86_64.rpm #?MongoDB工具

2. 編輯配置文件vim ?/etc/mongod.conf

? ? 1）去掉以下兩行以#開頭的注釋，以防重啟報錯

? ? ? ? ?fork:true

? ? ? ? ?pidFilePath:/var/mongodb/mongod.pid

? ? 2）bind_ip綁定多個IP，用逗號隔開，如監聽全部，留空即可

3. 修改配置參數，啟動mongd

? ? echo never > /sys/kernel/mm/transparent_hugepage/enabled

? ? echo never > /sys/kernel/mm/transparent_hugepage/defrag

? ? 編輯vim /etc/security/limits.conf，加入內容：

? ? mongod soft nofile 64000

? ? mongod hard nofile 64000

? ? mongod soft nproc 32000

? ? mongod hard nproc 32000

? ? service mongd start

? ? 注：啟動過程較慢，這是它在寫數據/var/lib/mongo，如果啟動不了，mongod -f /etc/mongod.conf方式，可以看到報錯

4. 編輯三臺機器的MongoDB配置文件vim /etc/mongod.conf，重啟

? ? 內容：

? ? ##1）去掉replication的注釋

? ? ##2）加入下面參數(注意首行留空2個空格，固定格式)：

? ? ## 類似于二進制日志

? ? ? ?oplogSizeMB: 20

? ? ## 副本集名字

? ? ? ?replSetName: huangzhenping

5. 查看日志文件tail /var/log/mongodb/mongod.log

?

6. 主上配置，搭建副本集? ?

? ? use admin # 主上進入admin庫

? ? config={_id:"huangzhenping",members:[{_id:0,host:"172.16.115.202:27017"},{_id:1,host:"172.16.115.157:27017"},{_id:2,host:"172.16.111.171:27017"}]} ?#配置機器

? ? rs.initiate(config) ?#刷新

? ? rs.status() ? #查看狀態

?如下結果：出現三臺機器的信息，主的狀態已變為PRIMARY

>?rs.initiate(config) {?"ok"?:?1?} huangzhenping:OTHER>?rs.status() {"set"?:?"huangzhenping","date"?:?ISODate("2017-01-14T20:24:59.490Z"),"myState"?:?1,"members"?:?[{"_id"?:?0,"name"?:?"172.16.115.202:27017","health"?:?1,"state"?:?1,"stateStr"?:?"PRIMARY","uptime"?:?297,"optime"?:?Timestamp(1484425453,?1),"optimeDate"?:?ISODate("2017-01-14T20:24:13Z"),"electionTime"?:?Timestamp(1484425455,?1),"electionDate"?:?ISODate("2017-01-14T20:24:15Z"),"configVersion"?:?1,"self"?:?true},{"_id"?:?1,"name"?:?"172.16.115.157:27017","health"?:?1,"state"?:?2,"stateStr"?:?"SECONDARY","uptime"?:?45,"optime"?:?Timestamp(1484425453,?1),"optimeDate"?:?ISODate("2017-01-14T20:24:13Z"),"lastHeartbeat"?:?ISODate("2017-01-14T20:24:57.851Z"),"lastHeartbeatRecv"?:?ISODate("2017-01-14T20:24:58.343Z")??????????????????,"pingMs"?:?0,"configVersion"?:?1},{"_id"?:?2,"name"?:?"172.16.111.171:27017","health"?:?1,"state"?:?2,"stateStr"?:?"SECONDARY","uptime"?:?45,"optime"?:?Timestamp(1484425453,?1),"optimeDate"?:?ISODate("2017-01-14T20:24:13Z"),"lastHeartbeat"?:?ISODate("2017-01-14T20:24:57.863Z"),"lastHeartbeatRecv"?:?ISODate("2017-01-14T20:24:58.262Z")??????????????????,"pingMs"?:?1,"configVersion"?:?1}],"ok"?:?1 } huangzhenping:PRIMARY>

? ? 注：

? ? ? ?1）如執行rs.status()命令，沒有發現三臺機器，需手動執行添加

? ? ? ? ? ? rs.add("172.16.115.157")

? ? ? ? ? ? rs.add("172.16.111.171")

? ? ? ?2）如從機的狀態為"stateStr":"STARTUP"，則需執行：

? ? ? ? ? ? var config={_id:"huangzhenping",members:[{_id:0,host:"172.16.115.202:27017"},{_id:1,host:"172.16.115.157:27017"},{_id:2,host:"172.16.111.171:27017"}]}

? ? ? ? ? ? rs.initiate(config)

7. 從上登錄，狀態已變為：SECONDARY

?

二、MongoDB主從測試

1. mongodb副本集測試

? ? 1）主上建庫，建集合

? ? ?use mydb

? ? ?db.createCollection('testA')

? ? ?show dbs

? ? ?show tables

?

? ? 2）從上查看，已成功同步庫和集合

? ? ?rs.slaveOk()

? ? ?show dbs

?

2. 副本集更改權重，模擬主宕機

? ?1）主上設置不同的權重，并查看

? ? ? ?cfg = rs.conf()

? ? ? ?cfg.members[0].priority = 3

? ? ? ?cfg.members[1].priority = 2

? ? ? ?cfg.members[2].priority = 1

? ? ? ?rs.reconfig(cfg)

? ? ? ?rs.config()

? ? ? ?查看生效的權重：

huangzhenping:PRIMARY>?rs.config() {"_id"?:?"huangzhenping","version"?:?2,"members"?:?[{"_id"?:?0,"host"?:?"172.16.115.202:27017","arbiterOnly"?:?false,"buildIndexes"?:?true,"hidden"?:?false,"priority"?:?3,"tags"?:?{},"slaveDelay"?:?0,"votes"?:?1},{"_id"?:?1,"host"?:?"172.16.115.157:27017","arbiterOnly"?:?false,"buildIndexes"?:?true,"hidden"?:?false,"priority"?:?2,"tags"?:?{},"slaveDelay"?:?0,"votes"?:?1},{"_id"?:?2,"host"?:?"172.16.111.171:27017","arbiterOnly"?:?false,"buildIndexes"?:?true,"hidden"?:?false,"priority"?:?1,"tags"?:?{},"slaveDelay"?:?0,"votes"?:?1}],"settings"?:?{"chainingAllowed"?:?true,"heartbeatTimeoutSecs"?:?10,"getLastErrorModes"?:?{},"getLastErrorDefaults"?:?{"w"?:?1,"wtimeout"?:?0}} }

2） 主上禁用27017端口，模擬主宕機

? ? ? ? iptables -I INPUT -p tcp --dport 27017 -j DROP

? ? ? ? 原主上：已連接失敗

??

? ? ? ?原一臺從機：狀態已變為PRIMARY

????

? ? ? ?rs.status()查看狀態：

huangzhenping:PRIMARY>?rs.status() {"set"?:?"huangzhenping","date"?:?ISODate("2017-01-22T15:48:15.453Z"),"myState"?:?1,"members"?:?[{"_id"?:?0,"name"?:?"172.16.115.202:27017","health"?:?0,"state"?:?8,"stateStr"?:?"(not?reachable/healthy)","uptime"?:?0,"optime"?:?Timestamp(0,?0),"optimeDate"?:?ISODate("1970-01-01T00:00:00Z"),"lastHeartbeat"?:?ISODate("2017-01-22T15:48:14.551Z"),"lastHeartbeatRecv"?:?ISODate("2017-01-22T15:48:14.632Z"),"pingMs"?:?0,"lastHeartbeatMessage"?:?"Failed?attempt?to?connect?to?172.16.115.202:27017;?couldn't?connect?to?server?172.16.115.202:27017?(172.16.115.202),?connection?attempt?failed","configVersion"?:?-1},{"_id"?:?1,"name"?:?"172.16.115.157:27017","health"?:?1,"state"?:?1,"stateStr"?:?"PRIMARY","uptime"?:?16333,"optime"?:?Timestamp(1484429320,?1),"optimeDate"?:?ISODate("2017-01-14T21:28:40Z"),"electionTime"?:?Timestamp(1485100022,?1),"electionDate"?:?ISODate("2017-01-22T15:47:02Z"),"configVersion"?:?2,"self"?:?true},{"_id"?:?2,"name"?:?"172.16.111.171:27017","health"?:?1,"state"?:?2,"stateStr"?:?"SECONDARY","uptime"?:?5989,"optime"?:?Timestamp(1484429320,?1),"optimeDate"?:?ISODate("2017-01-14T21:28:40Z"),"lastHeartbeat"?:?ISODate("2017-01-22T15:48:14.751Z"),"lastHeartbeatRecv"?:?ISODate("2017-01-22T15:48:14.749Z"),"pingMs"?:?0,"lastHeartbeatMessage"?:?"could?not?find?member?to?sync?from","configVersion"?:?2}],"ok"?:?1 }

3）新主上，創建一個庫和集合

? ? ?use mydb2

? ? ?db.createCollection('testB')

?

?

4）恢復舊主，則自動切換為MASTER狀態，并同步自己離線時新主上創建的庫

? ? ? iptables -D INPUT -p tcp --dport 27017 -j DROP

?

三、MongoDB結合php

1. 下載安裝mongo擴展模塊

? ? ?wget https://github.com/mongodb/mongo-php-driver-legacy/archive/master.zip

? ? ?unzip mongo-php-driver-legacy-master.zip

? ? ?cd mongo-php-driver-legacy-master

? ? ?/usr/bin/phpize

? ? ?./configure --with-php-config=/usr/bin/php-config

? ? ?make;make install?

? ? ?

2. 編輯php配置文件vim /etc/php.ini，加載擴展模塊

??

?

3. 編輯測試文件 vim /usr/local/apache2/htdocs/1.php

? ? 內容：

<?php //?連接到mongodb $m?=?new?MongoClient(); echo?"Connection?to?database?successfully"; //?選擇一個數據庫 $db?=?$m->mydb; echo?"Database?mydb?selected"; ?>

4. 測試 curl localhost/1.php

?

轉載于:https://blog.51cto.com/huangzp/1904088

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