一、集群规划

1.1 集群安装规划

1.2 端口规划

mongos：20000
config：21000
shard1：27001
shard2：27002
shard3：27003

1.3 目录创建

数据目录：
/mongodb/data/config
/mongodb/data/shard1
/mongodb/data/shard2
/mongodb/data/shard3
日志目录：
/mongodb/logs/mongos
/mongodb/logs/config
/mongodb/logs/shard1
/mongodb/logs/shard2
/mongodb/logs/shard3
配置目录：
/usr/local/mongodb/conf
/usr/local/mongodb/server

二、mongodb安装（三台均需要操作）

2.1 下载、解压

https://www.mongodb.com/try/download/community-edition/releases/archive

cd /usr/local/
tar -zxvf mongodb-linux-x86_64-rhel70-4.0.26.tgz

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2.2 配置环境变量

vim /etc/profile

#mongodb path
export MONGODB_HOME=/usr/local/mongodb
export PATH=$MONGODB_HOME/bin:$PATH

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source /etc/profile

三、mongodb组件配置

3.1 配置config server的副本集

3.1.1 config配置文件

vim /usr/local/mongodb/conf/config.conf

## content
systemLog:
  destination: file
  logAppend: true
  path: /mongodb/logs/config.log

# Where and how to store data.
storage:
  dbPath: /mongodb/data/config
  journal:
    enabled: true

# how the process runs
processManagement:
  fork: true
  pidFilePath: /mongodb/logs/config/configsrv.pid

# network interfaces
net:
  port: 21000
  bindIp: 0.0.0.0

#operationProfiling:
replication:
  replSetName: config        
sharding:
  clusterRole: configsvr

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3.1.2 config server启动

/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/config.conf &

3.1.3 初始化config

只需要在一台主机上执行

mongo 10.10.3.134:21000

config = {_id : "config",members : [{_id : 0, host : "10.10.3.134:21000" },{_id : 1, host : "10.10.3.135:21000" },{_id : 2, host : "10.10.3.136:21000" }]}

rs.initiate(config)

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需要关闭防火墙，selinux

3.2 配置shard1 server的副本集

3.2.1 shard1配置文件

vim /usr/local/mongodb/conf/shard1.conf

# where to write logging data.
systemLog:
  destination: file
  logAppend: true
  path: /mongodb/logs/shard1/shard1.log

# Where and how to store data.
storage:
  dbPath: /mongodb/data/shard1
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
       cacheSizeGB: 1

# how the process runs
processManagement:
  fork: true
  pidFilePath: /mongodb/logs/shard1/shard1.pid

# network interfaces
net:
  port: 27001
  bindIp: 0.0.0.0

#operationProfiling:
replication:
  replSetName: shard1
sharding:
  clusterRole: shardsvr

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同步配置文件

scp /usr/local/mongodb/conf/shard1.conf root@mongo02:/usr/local/mongodb/conf/
scp /usr/local/mongodb/conf/shard1.conf root@mongo03:/usr/local/mongodb/conf/

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3.2.2 启动shard1

三台主机上执行

/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/shard1.conf &

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3.2.3 初始化shard1

只需要在一台主机上执行

mongo mongo01:27001

use admin

config = { _id : "shard1",members : [{_id : 0, host : "10.10.3.134:27001" ,priority: 2 },{_id : 1, host : "10.10.3.135:27001" ,priority: 1 },{_id : 2, host : "10.10.3.136:27001",arbiterOnly: true}]}

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“priority”优先级，数字越大，优先等级越高；“arbiterOnly”仲裁节点:仲裁节点根据优先等级判断哪个节点作为主节点

3.3 配置shard2 server的副本集

3.3.1 shard2配置文件

vim /usr/local/mongodb/conf/shard2.conf

# where to write logging data.
systemLog:
  destination: file
  logAppend: true
  path: /mongodb/logs/shard2/shard2.log

# Where and how to store data.
storage:
  dbPath: /mongodb/data/shard2
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
       cacheSizeGB: 1

# how the process runs
processManagement:
  fork: true
  pidFilePath: /mongodb/logs/shard2/shard2.pid

# network interfaces
net:
  port: 27002
  bindIp: 0.0.0.0

#operationProfiling:
replication:
  replSetName: shard2
sharding:
  clusterRole: shardsvr

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同步配置文件

scp /usr/local/mongodb/conf/shard2.conf root@mongo02:/usr/local/mongodb/conf/
scp /usr/local/mongodb/conf/shard2.conf root@mongo03:/usr/local/mongodb/conf/

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3.3.2 启动shard2

三台主机上执行
/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/shard2.conf &

3.3.3 初始化shard2

只需要在一台主机上执行

mongo mongo01:27002

use admin

config = { _id : "shard2",members : [{_id : 0, host : "10.10.3.134:27002" ,arbiterOnly: true },{_id : 1, host : "10.10.3.135:27002" ,priority: 2 },{_id : 2, host : "10.10.3.136:27002",priority: 1}]}

rs.initiate(config)

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3.4 配置shard3 server的副本集

3.4.1 shard3配置文件

vim /usr/local/mongodb/conf/shard3.conf

# where to write logging data.
systemLog:
  destination: file
  logAppend: true
  path: /mongodb/logs/shard3/shard3.log

# Where and how to store data.
storage:
  dbPath: /mongodb/data/shard3
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
       cacheSizeGB: 1

# how the process runs
processManagement:
  fork: true
  pidFilePath: /mongodb/logs/shard3/shard3.pid

# network interfaces
net:
  port: 27003
  bindIp: 0.0.0.0

#operationProfiling:
replication:
  replSetName: shard3
sharding:
  clusterRole: shardsvr

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同步配置文件

scp /usr/local/mongodb/conf/shard3.conf root@mongo02:/usr/local/mongodb/conf/
scp /usr/local/mongodb/conf/shard3.conf root@mongo03:/usr/local/mongodb/conf/

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3.4.2 启动shard3

三台主机上执行

/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/shard3.conf &

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3.4.3 初始化shard3

只需要在一台主机上执行

mongo mongo01:27003

use admin

config = { _id : "shard3",members : [{_id : 0, host : "10.10.3.134:27003" ,priority: 1 },{_id : 1, host : "10.10.3.135:27003" ,arbiterOnly: true },{_id : 2, host : "10.10.3.136:27003",priority: 2}]}

rs.initiate(config)

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3.5 配置mongos server的副本集

3.5.1 mongos配置文件

vim /usr/local/mongodb/conf/mongos.conf

systemLog:
  destination: file
  logAppend: true
  path: /mongodb/logs/mongos/mongos.log
processManagement:
  fork: true
  pidFilePath: /mongodb/logs/mongos/mongos.pid

# network interfaces
net:
  port: 20000
  bindIp: 0.0.0.0
sharding:
  configDB: config/10.10.3.134:21000,10.10.3.135:21000,10.10.3.136:21000

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同步配置文件

scp /usr/local/mongodb/conf/mongos.conf root@mongo02:/usr/local/mongodb/conf/
scp /usr/local/mongodb/conf/mongos.conf root@mongo03:/usr/local/mongodb/conf/

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3.5.2 启动mongos

三台主机上执行

/usr/local/mongodb/bin/mongos -f /usr/local/mongodb/conf/mongos.conf &

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3.6 添加分片

只需要在一台主机上执行

mongo mongo01:20000
sh.addShard("shard1/10.10.3.134:27001,10.10.3.135:27001,10.10.3.136:27001")
sh.addShard("shard2/10.10.3.134:27002,10.10.3.135:27002,10.10.3.136:27002")
sh.addShard("shard3/10.10.3.134:27003,10.10.3.135:27003,10.10.3.136:27003")

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查看分片状态

sh.status()

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3.7 安全验证

3.7.1 生成key文件

openssl rand -base64 756 > /usr/local/mongodb/conf/KeyFile.file

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分发key文件

scp /usr/local/mongodb/conf/KeyFile.file root@mongo02:/usr/local/mongodb/conf/
scp /usr/local/mongodb/conf/KeyFile.file root@mongo03:/usr/local/mongodb/conf/

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3.7.2 创建管理员用户密码

只需要在一台主机上执行

mongo -port 20000

use admin

db.createUser(
{
user:"live",
pwd:"xxxx",
roles:[{role:"root",db:"admin"}]
}
)

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3.7.3 关闭所有的节点

按照先后顺序来处理关闭，mongos>config>shard3>shard2>shard1
三台主机的服务都关闭后再关闭下一个服务。例如三台主机mongos服务都关闭后再关闭config服务，以此类推
关闭mongos

mongo -port 20000

use admin

db.auth('live','xxxx')

db.shutdownServer()

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关闭config

/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/config.conf --shutdown

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关闭shard

/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/shard3.conf --shutdown
/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/shard2.conf --shutdown
/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/shard1.conf --shutdown

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3.7.4 在配置文件后添加key文件

config.conf、shard1.conf、shard2.conf、shard3.conf最后添加：

security:
  keyFile: /usr/local/mongodb/conf/KeyFile.file
  authorization: enabled

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mongos.conf配置文件中最后添加：

security:
keyFile: /usr/local/mongodb/conf/KeyFile.file

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同步配置文件

scp *.conf root@mongo02:/usr/local/mongodb/conf/
scp *.conf root@mongo03:/usr/local/mongodb/conf/

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3.7.5 启动所有节点

启动顺序：config>shadr1>shadr2>shadr3>mongos
三台主机的服务都开启后再开启下一个服务。例如三台主机config服务都开启后再开启shard1服务，以此类推

/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/config.conf &
/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/shard1.conf &
/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/shard2.conf &
/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/shard3.conf &
/usr/local/mongodb/bin/mongos -f /usr/local/mongodb/conf/mongos.conf &

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3.7.6 开启分片

mongo 10.10.3.134:20000
use admin
db.auth('live','xxxx')
#为testdb库开启分片功能
db.runCommand( { enablesharding :"testdb"})
#指定数据库里需要分片的集合和片键
db.runCommand( { shardcollection : "testdb.table1",key : {_id: 1} } )

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3.7.7 设置chunksize

use testdb
#设置数据块的大小，超过这个数据块大小（1M）就会分裂，自动均衡迁移到别的分片
db.settings.save({"_id":"chunksize","value":1})
#查看配置
db.settings.find()

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四、验证

4.1 批量插入数据

use testdb

for (var i = 1; i <= 100000; i++){db.table1.insert({"_id":i,"test1":"testval1"+i});}

#查看数据分布
db.table1.getShardDistribution()

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等十几分钟后，数据会均匀分配到其他分片