4.1、安装部署
1、选择三台服务器：10.211.55.7（主节点） 10.211.55.8（副本节点） 10.211.55.9（副本节点）
下载mongodb：
wget <https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.4.7.tgz>
解压到：/root/data/program/software
文件夹重命名为mongodb
进入mongodb目录：cd /root/data/program/software/mongodb
新建两个文件夹：
mkdir db
mkdir logs
进入bin目录cd /root/data/program/software/mongodb/bin
新建配置文件：
touch mongodb.conf
内容：
dbpath=/root/data/program/software/mongodb/db
logpath=/root/data/program/software/mongodb/logs/mongodb.log
port=27017
fork=true
nohttpinterface=true
命令解释：mongod --dbpath=/data/db前台启动Mongodb进程，如果Session窗口关闭，Mongodb进程也随之停止，不过Mongodb同时还提供了一种后台Daemon方式启动，只需要加上一个"--fork"参数即可，值得注意的是，用到了"--fork"参数就必须启用"--logpath"参数。
分别三台服务器上启动mongodb：
/root/data/program/software/mongodb/bin/mongod --replSet repset -f /root/data/program/software/mongodb/bin/mongodb.conf
命令解释：
启动配置文件
各个服务器查看，都已经启动：
[root@bigdata3 bin]# ps -ef|grep mongodb
root 2574 1 1 22:09 ? 00:00:00 /data/program/software/mongodb/bin/mongod --replSet repset -f /root/data/program/software/mongodb/bin/mongodb.conf
在三台机器上任意一台机器登陆mongodb：
/root/data/program/software/mongodb/bin/mongo
使用admin数据库
use admin
定义副本集配置变量，这里的_id:”repset”和上面命令参数--replSet repset保持一致
config = { _id:"repset", members:[{_id:0,host:"192.168.222.128:27017"},{_id:1,host:"192.168.222.129:27017"},{_id:2,host:"192.168.222.130:27017"}]}
初始化副本集群：
rs.initiate(config);
表示成功
查看集群节点的状态：
rs.status();
如下结果：
{
"set" : "repset",
"date" : ISODate("2017-09-21T14:30:17.190Z"),
"myState" : 1,
"term" : NumberLong(1),
"heartbeatIntervalMillis" : NumberLong(2000),
"optimes" : {
"lastCommittedOpTime" : {
"ts" : Timestamp(1506004207, 1),
"t" : NumberLong(1)
},
"appliedOpTime" : {
"ts" : Timestamp(1506004207, 1),
"t" : NumberLong(1)
},
"durableOpTime" : {
"ts" : Timestamp(1506004207, 1),
"t" : NumberLong(1)
}
},
"members" : [
{
"_id" : 0,
"name" : "10.211.55.7:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 111,
"optime" : {
"ts" : Timestamp(1506004207, 1),
"t" : NumberLong(1)
},
"optimeDurable" : {
"ts" : Timestamp(1506004207, 1),
"t" : NumberLong(1)
},
"optimeDate" : ISODate("2017-09-21T14:30:07Z"),
"optimeDurableDate" : ISODate("2017-09-21T14:30:07Z"),
"lastHeartbeat" : ISODate("2017-09-21T14:30:16.070Z"),
"lastHeartbeatRecv" : ISODate("2017-09-21T14:30:16.887Z"),
"pingMs" : NumberLong(0),
"syncingTo" : "10.211.55.9:27017",
"configVersion" : 1
},
{
"_id" : 1,
"name" : "10.211.55.8:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 111,
"optime" : {
"ts" : Timestamp(1506004207, 1),
"t" : NumberLong(1)
},
"optimeDurable" : {
"ts" : Timestamp(1506004207, 1),
"t" : NumberLong(1)
},
"optimeDate" : ISODate("2017-09-21T14:30:07Z"),
"optimeDurableDate" : ISODate("2017-09-21T14:30:07Z"),
"lastHeartbeat" : ISODate("2017-09-21T14:30:16.070Z"),
"lastHeartbeatRecv" : ISODate("2017-09-21T14:30:16.877Z"),
"pingMs" : NumberLong(0),
"syncingTo" : "10.211.55.9:27017",
"configVersion" : 1
},
{
"_id" : 2,
"name" : "10.211.55.9:27017",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 163,
"optime" : {
"ts" : Timestamp(1506004207, 1),
"t" : NumberLong(1)
},
"optimeDate" : ISODate("2017-09-21T14:30:07Z"),
"infoMessage" : "could not find member to sync from",
"electionTime" : Timestamp(1506004115, 1),
"electionDate" : ISODate("2017-09-21T14:28:35Z"),
"configVersion" : 1,
"self" : true
}
],
"ok" : 1
}