準(zhǔn)備
1吓蘑、JDK8
2挣柬、MongoDB安裝包
3拴曲、在華為云上申請(qǐng)三個(gè)ECS節(jié)點(diǎn)，內(nèi)外IP分別是192.168.0.19凛忿、192.168.0.6澈灼、192.168.0.37
1、安裝JDK
分別在三臺(tái)機(jī)器上安裝JDK
在/home目錄下面創(chuàng)建mongodb文件夾店溢，并把jdk和mongodb的安裝包上傳到文件夾下面叁熔。解壓jdk，然后在/etc/profile文件最后添加環(huán)境變量
tar -xzvf jdk-8u281-linux-x64.tar.gz
vi /etc/profile
文件內(nèi)容：
export JAVA_HOME=/home/mongodb/jdk1.8.0_281
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar:$CLASSPATH
檢查jdk是否安裝成功
source /etc/profile
java -version
安裝成功顯示如下
java version "1.8.0_281"
Java(TM) SE Runtime Environment (build 1.8.0_281-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.281-b09, mixed mode)
2床牧、安裝mongodb集群
在/home/mongodb下面解壓mongodb壓縮包荣回，添加環(huán)境變量
tar -xzvf mongodb-linux-x86_64-3.6.22.tgz
echo 'export PATH=$PATH:/home/mongodb/mongodb-linux-x86_64-3.6.22/bin' >> /etc/profile
source /etc/profile
創(chuàng)建data目錄和log目錄,添加配置文件
mkdir data
mkdir log
vi mongodb.conf
配置文件信息
dbpath=/home/mongodb/data/
logpath=/home/mongodb/log/mongodb.log
pidfilepath=/home/mongodb/mongodb.pid
directoryperdb=true
logappend=true
replSet=mymongodb
bind_ip=0.0.0.0
port=27017
oplogSize=10000
fork=false
參數(shù)解釋?zhuān)?br>
dbpath：數(shù)據(jù)存放目錄
logpath：日志存放路徑
pidfilepath：進(jìn)程文件，方便停止mongodb
directoryperdb：為每一個(gè)數(shù)據(jù)庫(kù)按照數(shù)據(jù)庫(kù)名建立文件夾存放
logappend：以追加的方式記錄日志
replSet：replica set的名字
bind_ip：mongodb所綁定的ip地址
port：mongodb進(jìn)程所使用的端口號(hào)戈咳，默認(rèn)為27017
oplogSize：mongodb操作日志文件的最大大小心软。單位為Mb壕吹，默認(rèn)為硬盤(pán)剩余空間的5%
fork：以后臺(tái)方式運(yùn)行進(jìn)程
noprealloc：不預(yù)先分配存儲(chǔ)
啟動(dòng)mongodb，分別在三個(gè)節(jié)點(diǎn)上執(zhí)行下面命令
mongod -f /home/mongodb/mongodb.conf
啟動(dòng)成功信息如下所示
about to fork child process, waiting until server is ready for connections.
forked process: 1659
child process started successfully, parent exiting
連接數(shù)據(jù)庫(kù)
mongo --host 192.168.0.19 --port 27017
切換數(shù)據(jù)庫(kù)：
use admin
初始化復(fù)制集：
rs.initiate({_id:"mymongodb",members:[{_id:0,host:"192.168.0.19:27017"},{_id:1,host:"192.168.0.6:27017"}, {_id:2,host:"192.168.0.37:27017"}]})
其中_id:"mymongodb"的mymongodb是上面config.conf配置文件里的復(fù)制集名稱删铃，把三臺(tái)服務(wù)器的配置服務(wù)組成復(fù)制集耳贬。
過(guò)十多秒后查看狀態(tài)：
rs.status()
執(zhí)行上面的命令查看狀態(tài)，三臺(tái)機(jī)器的配置服務(wù)就已形成復(fù)制集猎唁，其中1臺(tái)為PRIMARY咒劲，其他2臺(tái)為SECONDARY
{
"set" : "mymongodb",
"date" : ISODate("2021-03-18T17:07:19.075Z"),
"myState" : 1,
"term" : NumberLong(1),
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"heartbeatIntervalMillis" : NumberLong(2000),
"optimes" : {
"lastCommittedOpTime" : {
"ts" : Timestamp(1616087239, 1),
"t" : NumberLong(1)
},
"readConcernMajorityOpTime" : {
"ts" : Timestamp(1616087239, 1),
"t" : NumberLong(1)
},
"appliedOpTime" : {
"ts" : Timestamp(1616087239, 1),
"t" : NumberLong(1)
},
"durableOpTime" : {
"ts" : Timestamp(1616087239, 1),
"t" : NumberLong(1)
}
},
"members" : [
{
"_id" : 0,
"name" : "192.168.0.19:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 43,
"optime" : {
"ts" : Timestamp(1616087229, 1),
"t" : NumberLong(1)
},
"optimeDurable" : {
"ts" : Timestamp(1616087229, 1),
"t" : NumberLong(1)
},
"optimeDate" : ISODate("2021-03-18T17:07:09Z"),
"optimeDurableDate" : ISODate("2021-03-18T17:07:09Z"),
"lastHeartbeat" : ISODate("2021-03-18T17:07:17.254Z"),
"lastHeartbeatRecv" : ISODate("2021-03-18T17:07:18.126Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncingTo" : "192.168.0.37:27017",
"syncSourceHost" : "192.168.0.37:27017",
"syncSourceId" : 2,
"infoMessage" : "",
"configVersion" : 1
},
{
"_id" : 1,
"name" : "192.168.0.6:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 43,
"optime" : {
"ts" : Timestamp(1616087229, 1),
"t" : NumberLong(1)
},
"optimeDurable" : {
"ts" : Timestamp(1616087229, 1),
"t" : NumberLong(1)
},
"optimeDate" : ISODate("2021-03-18T17:07:09Z"),
"optimeDurableDate" : ISODate("2021-03-18T17:07:09Z"),
"lastHeartbeat" : ISODate("2021-03-18T17:07:17.253Z"),
"lastHeartbeatRecv" : ISODate("2021-03-18T17:07:18.108Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncingTo" : "192.168.0.37:27017",
"syncSourceHost" : "192.168.0.37:27017",
"syncSourceId" : 2,
"infoMessage" : "",
"configVersion" : 1
},
{
"_id" : 2,
"name" : "192.168.0.37:27017",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 352,
"optime" : {
"ts" : Timestamp(1616087239, 1),
"t" : NumberLong(1)
},
"optimeDate" : ISODate("2021-03-18T17:07:19Z"),
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "could not find member to sync from",
"electionTime" : Timestamp(1616087207, 1),
"electionDate" : ISODate("2021-03-18T17:06:47Z"),
"configVersion" : 1,
"self" : true,
"lastHeartbeatMessage" : ""
}
],
"ok" : 1,
"operationTime" : Timestamp(1616087239, 1),
"$clusterTime" : {
"clusterTime" : Timestamp(1616087239, 1),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
}
}
