mongo 3.2 replica set 配置
一、环境信息CentOS release 6.7 (Final)
mongo version: 3.2.6
192.168.1.173 primary
192.168.1.174 secondary
192.168.1.172 secondary or arbiter
二、安装mongo
1、yum源配置（使用哪个版本enable=1）
# cat /etc/yum.repos.d/mongodb-org-3.2.repo
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.2/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-3.2.asc
name=MongoDB 2.6 Repository
baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/x86_64/
gpgcheck=0
enabled=0
2、yum install -y mongodb-org
三、replicat set 配置
1、修改配置文件(三台服务器除了ip不一样)：
cat /etc/mongod.conf
# mongod.conf
# for documentation of all options, see:
# http://docs.mongodb.org/manual/reference/configuration-options/
# where to write logging data.
systemLog:
destination: file
logAppend: true
path: /var/log/mongodb/mongod.log
# Where and how to store data.
storage:
dbPath: /data/mongo
# dbPath: /var/lib/mongo
journal:
enabled: true
#engine:
#mmapv1:
#wiredTiger:
# how the process runs
processManagement:
fork: true# fork and run in background
pidFilePath: /var/run/mongodb/mongod.pid# location of pidfile
# network interfaces
net:
port: 27017
bindIp: 192.168.1.173# Listen to local interface only, comment to listen on all interfaces.
#security:
security: #副本集配置成功之后才能打开安全认证
authorization: enabled #开启认证
keyFile: /data/mongo/mongodb-keyfile #副本集使用keyFile进行相互认证
#operationProfiling:
#replication:
replication:
oplogSizeMB: 2000 #oplog的大小M
replSetName: rongyi #副本集的名称
#sharding:
## Enterprise-Only Options
#auditLog:
#snmp:
2、配置replicat set 过程
#启动mongod服务
#/usr/bin/mongod -f /etc/mongod.conf
启动成功之后因为还未开启auth认证，可以直接命令行登录
#mongo 192.168.1.173
use admin
admin> config = { _id:"rongyi",members:[
... {_id:172,host:"192.168.1.172:27017",arbiterOnly:true},
... {_id:173,host:"192.168.1.173:27017"},
... {_id:174,host:"192.168.1.174:27017"}]
... }
{
"_id" : "rongyi",
"members" : [
{
"_id" : 172,
"host" : "192.168.1.172:27017",
"arbiterOnly" : true
},
{
"_id" : 173,
"host" : "192.168.1.173:27017"
},
{
"_id" : 174,
"host" : "192.168.1.174:27017"
}
]
}
admin> rs.initiate(config)
{ "ok" : 1 }
或者使用config = { _id:"rongyi",members:[{_id:172,host:"192.168.1.172:27017"},{_id:173,host:"192.168.1.173:27017"},{_id:174,host:"192.168.1.174:27017"}]}
注：前者是一个备份节点，后者是两个备份节点，mongo选举的过程必须符合大多数，如果是偶数的节点，可以使用arbiter（仲裁节点），此节点只是为了参与选举
使用rs.status()查看replicat set的状态
3、创建管理员账户(这个账户要使用root role 否则会报错)：
admin> db.createUser({user:"admin",pwd:"********",roles:[{ role:"root", db:"admin" }]})
Successfully added user: {
"user" : "admin",
"roles" : [
{
"role" : "root",
"db" : "admin"
}
]
}
4、配置keyfile认证
在192.168.1.173上执行
openssl rand -base64 741 > /data/mongo/mongodb-keyfile
chmod 600 /data/mongo/mongodb-keyfile
scp mongodb-keyfile 192.168.1.174:/data/mongo/
scp mongodb-keyfile 192.168.1.172:/data/mongo/
在配置文件中开启认证：
security:
authorization: enabled
keyFile: /data/mongo/mongodb-keyfile
5、重启mongod服务
/etc/init.d/mongod stop && /usr/bin/mongod -f /etc/mongod.conf
四、登录验证
mongo 192.168.1.173:27017/admin -uadmin -p*******
admin> rs.status()
{
"set" : "rongyi",
"date" : ISODate("2016-06-24T08:31:28.549Z"),
"myState" : 1,
"term" : NumberLong(7),
"heartbeatIntervalMillis" : NumberLong(2000),
"members" : [
{
"_id" : 172,
"name" : "192.168.1.172:27017",
"health" : 1,
"state" : 7,
"stateStr" : "ARBITER", #使用了仲裁
"uptime" : 19572,
"lastHeartbeat" : ISODate("2016-06-24T08:31:26.604Z"),
"lastHeartbeatRecv" : ISODate("2016-06-24T08:31:24.145Z"),
"pingMs" : NumberLong(0),
"configVersion" : 3
},
{
"_id" : 173,
"name" : "192.168.1.173:27017",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 19573,
"optime" : {
"ts" : Timestamp(1466740497, 1),
"t" : NumberLong(7)
},
"optimeDate" : ISODate("2016-06-24T03:54:57Z"),
"electionTime" : Timestamp(1466737527, 1),
"electionDate" : ISODate("2016-06-24T03:05:27Z"),
"configVersion" : 3,
"self" : true
},
{
"_id" : 174,
"name" : "192.168.1.174:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 19567,
"optime" : {
"ts" : Timestamp(1466740497, 1),
"t" : NumberLong(7)
},
"optimeDate" : ISODate("2016-06-24T03:54:57Z"),
"lastHeartbeat" : ISODate("2016-06-24T08:31:26.604Z"),
"lastHeartbeatRecv" : ISODate("2016-06-24T08:31:26.604Z"),
"pingMs" : NumberLong(0),
"syncingTo" : "192.168.1.173:27017",
"configVersion" : 3
}
],
"ok" : 1
}
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